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authorIngo Molnar <mingo@kernel.org>2020-06-26 12:24:42 +0200
committerIngo Molnar <mingo@kernel.org>2020-06-26 12:24:42 +0200
commit2c92d787cc9fad57d05c96bd117782183768258a (patch)
tree51c0c567b8be2fd56073a8ce31f8ebd123a7d562 /arch
parent145a773aef83181d47ebab21bb33c89233aadb1e (diff)
parent8be3a53e18e0e1a98f288f6c7f5e9da3adbe9c49 (diff)
downloadlinux-2c92d787cc9fad57d05c96bd117782183768258a.tar.bz2
Merge branch 'linus' into x86/entry, to resolve conflicts
Conflicts: arch/x86/kernel/traps.c Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/kernel/ftrace.c3
-rw-r--r--arch/arm/kernel/kgdb.c2
-rw-r--r--arch/arm/kernel/traps.c2
-rw-r--r--arch/arm/mm/alignment.c4
-rw-r--r--arch/arm64/Kconfig4
-rw-r--r--arch/arm64/Kconfig.debug15
-rw-r--r--arch/arm64/Makefile6
-rw-r--r--arch/arm64/include/asm/pgtable.h2
-rw-r--r--arch/arm64/kernel/fpsimd.c31
-rw-r--r--arch/arm64/kernel/hw_breakpoint.c44
-rw-r--r--arch/arm64/kernel/insn.c4
-rw-r--r--arch/arm64/kernel/machine_kexec_file.c3
-rw-r--r--arch/arm64/kernel/traps.c3
-rw-r--r--arch/arm64/mm/init.c15
-rw-r--r--arch/arm64/mm/mmu.c1
-rw-r--r--arch/csky/kernel/ftrace.c5
-rw-r--r--arch/ia64/include/asm/sections.h2
-rw-r--r--arch/ia64/kernel/ftrace.c6
-rw-r--r--arch/ia64/kernel/unwind_i.h2
-rw-r--r--arch/mips/kernel/kprobes.c6
-rw-r--r--arch/mips/kvm/mips.c2
-rw-r--r--arch/nds32/kernel/ftrace.c5
-rw-r--r--arch/parisc/kernel/ftrace.c2
-rw-r--r--arch/parisc/kernel/kgdb.c4
-rw-r--r--arch/parisc/kernel/process.c2
-rw-r--r--arch/parisc/lib/memcpy.c2
-rw-r--r--arch/powerpc/include/asm/nohash/32/pgtable.h18
-rw-r--r--arch/powerpc/include/asm/sections.h2
-rw-r--r--arch/powerpc/include/uapi/asm/papr_pdsm.h132
-rw-r--r--arch/powerpc/kernel/exceptions-64s.S4
-rw-r--r--arch/powerpc/kernel/kgdb.c2
-rw-r--r--arch/powerpc/kernel/kprobes.c2
-rw-r--r--arch/powerpc/kernel/module_64.c6
-rw-r--r--arch/powerpc/kernel/process.c25
-rw-r--r--arch/powerpc/kernel/trace/ftrace.c4
-rw-r--r--arch/powerpc/kvm/book3s_64_mmu_radix.c4
-rw-r--r--arch/powerpc/lib/inst.c12
-rw-r--r--arch/powerpc/oprofile/backtrace.c6
-rw-r--r--arch/powerpc/perf/callchain_32.c2
-rw-r--r--arch/powerpc/perf/callchain_64.c2
-rw-r--r--arch/powerpc/perf/core-book3s.c6
-rw-r--r--arch/powerpc/platforms/cell/spu_callbacks.c2
-rw-r--r--arch/powerpc/platforms/pseries/papr_scm.c420
-rw-r--r--arch/powerpc/sysdev/fsl_pci.c6
-rw-r--r--arch/riscv/include/asm/cmpxchg.h8
-rw-r--r--arch/riscv/kernel/ftrace.c3
-rw-r--r--arch/riscv/kernel/kgdb.c8
-rw-r--r--arch/riscv/kernel/patch.c4
-rw-r--r--arch/riscv/kernel/sys_riscv.c6
-rw-r--r--arch/riscv/kernel/traps.c4
-rw-r--r--arch/riscv/mm/pageattr.c14
-rw-r--r--arch/s390/Kconfig1
-rw-r--r--arch/s390/crypto/prng.c14
-rw-r--r--arch/s390/include/asm/syscall.h12
-rw-r--r--arch/s390/include/asm/vdso.h1
-rw-r--r--arch/s390/kernel/asm-offsets.c2
-rw-r--r--arch/s390/kernel/entry.S2
-rw-r--r--arch/s390/kernel/ftrace.c4
-rw-r--r--arch/s390/kernel/ipl.c2
-rw-r--r--arch/s390/kernel/ptrace.c83
-rw-r--r--arch/s390/kernel/time.c1
-rw-r--r--arch/s390/kernel/uv.c8
-rw-r--r--arch/s390/kernel/vdso64/Makefile10
-rw-r--r--arch/s390/kernel/vdso64/clock_getres.S10
-rw-r--r--arch/s390/mm/fault.c2
-rw-r--r--arch/sh/kernel/ftrace.c6
-rw-r--r--arch/sh/kernel/traps.c2
-rw-r--r--arch/um/kernel/maccess.c2
-rw-r--r--arch/x86/include/asm/kvm_host.h4
-rw-r--r--arch/x86/include/asm/mwait.h2
-rw-r--r--arch/x86/include/asm/ptrace.h4
-rw-r--r--arch/x86/kernel/cpu/umwait.c6
-rw-r--r--arch/x86/kernel/dumpstack.c2
-rw-r--r--arch/x86/kernel/ftrace.c10
-rw-r--r--arch/x86/kernel/kgdb.c6
-rw-r--r--arch/x86/kernel/kprobes/core.c21
-rw-r--r--arch/x86/kernel/kprobes/opt.c2
-rw-r--r--arch/x86/kernel/probe_roms.c24
-rw-r--r--arch/x86/kernel/traps.c3
-rw-r--r--arch/x86/kvm/lapic.c50
-rw-r--r--arch/x86/kvm/mmu.h2
-rw-r--r--arch/x86/kvm/mmu/mmu.c4
-rw-r--r--arch/x86/kvm/mmu/paging_tmpl.h16
-rw-r--r--arch/x86/kvm/svm/svm.c2
-rw-r--r--arch/x86/kvm/vmx/vmcs.h32
-rw-r--r--arch/x86/kvm/vmx/vmx.c27
-rw-r--r--arch/x86/kvm/vmx/vmx.h2
-rw-r--r--arch/x86/kvm/x86.c7
-rw-r--r--arch/x86/mm/fault.c8
-rw-r--r--arch/x86/mm/init_32.c2
-rw-r--r--arch/x86/mm/maccess.c4
-rw-r--r--arch/x86/pci/pcbios.c2
-rw-r--r--arch/x86/platform/intel-mid/sfi.c4
-rw-r--r--arch/x86/purgatory/Makefile1
-rw-r--r--arch/x86/xen/enlighten_pv.c2
95 files changed, 961 insertions, 329 deletions
diff --git a/arch/arm/kernel/ftrace.c b/arch/arm/kernel/ftrace.c
index 10499d44964a..9a79ef6b1876 100644
--- a/arch/arm/kernel/ftrace.c
+++ b/arch/arm/kernel/ftrace.c
@@ -84,7 +84,8 @@ static int ftrace_modify_code(unsigned long pc, unsigned long old,
old = __opcode_to_mem_arm(old);
if (validate) {
- if (probe_kernel_read(&replaced, (void *)pc, MCOUNT_INSN_SIZE))
+ if (copy_from_kernel_nofault(&replaced, (void *)pc,
+ MCOUNT_INSN_SIZE))
return -EFAULT;
if (replaced != old)
diff --git a/arch/arm/kernel/kgdb.c b/arch/arm/kernel/kgdb.c
index 6a95b9296640..7bd30c0a4280 100644
--- a/arch/arm/kernel/kgdb.c
+++ b/arch/arm/kernel/kgdb.c
@@ -236,7 +236,7 @@ int kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt)
/* patch_text() only supports int-sized breakpoints */
BUILD_BUG_ON(sizeof(int) != BREAK_INSTR_SIZE);
- err = probe_kernel_read(bpt->saved_instr, (char *)bpt->bpt_addr,
+ err = copy_from_kernel_nofault(bpt->saved_instr, (char *)bpt->bpt_addr,
BREAK_INSTR_SIZE);
if (err)
return err;
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 65a3b1e75480..17d5a785df28 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -396,7 +396,7 @@ int is_valid_bugaddr(unsigned long pc)
u32 insn = __opcode_to_mem_arm(BUG_INSTR_VALUE);
#endif
- if (probe_kernel_address((unsigned *)pc, bkpt))
+ if (get_kernel_nofault(bkpt, (void *)pc))
return 0;
return bkpt == insn;
diff --git a/arch/arm/mm/alignment.c b/arch/arm/mm/alignment.c
index 84718eddae60..81a627e6e1c5 100644
--- a/arch/arm/mm/alignment.c
+++ b/arch/arm/mm/alignment.c
@@ -774,7 +774,7 @@ static int alignment_get_arm(struct pt_regs *regs, u32 *ip, u32 *inst)
if (user_mode(regs))
fault = get_user(instr, ip);
else
- fault = probe_kernel_address(ip, instr);
+ fault = get_kernel_nofault(instr, ip);
*inst = __mem_to_opcode_arm(instr);
@@ -789,7 +789,7 @@ static int alignment_get_thumb(struct pt_regs *regs, u16 *ip, u16 *inst)
if (user_mode(regs))
fault = get_user(instr, ip);
else
- fault = probe_kernel_address(ip, instr);
+ fault = get_kernel_nofault(instr, ip);
*inst = __mem_to_opcode_thumb16(instr);
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 31380da53689..a4a094bedcb2 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1564,7 +1564,7 @@ config CC_HAS_SIGN_RETURN_ADDRESS
def_bool $(cc-option,-msign-return-address=all)
config AS_HAS_PAC
- def_bool $(as-option,-Wa$(comma)-march=armv8.3-a)
+ def_bool $(cc-option,-Wa$(comma)-march=armv8.3-a)
config AS_HAS_CFI_NEGATE_RA_STATE
def_bool $(as-instr,.cfi_startproc\n.cfi_negate_ra_state\n.cfi_endproc\n)
@@ -1630,6 +1630,8 @@ config ARM64_BTI_KERNEL
depends on CC_HAS_BRANCH_PROT_PAC_RET_BTI
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94697
depends on !CC_IS_GCC || GCC_VERSION >= 100100
+ # https://reviews.llvm.org/rGb8ae3fdfa579dbf366b1bb1cbfdbf8c51db7fa55
+ depends on !CC_IS_CLANG || CLANG_VERSION >= 100001
depends on !(CC_IS_CLANG && GCOV_KERNEL)
depends on (!FUNCTION_GRAPH_TRACER || DYNAMIC_FTRACE_WITH_REGS)
help
diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug
index cdf7ec0b975e..265c4461031f 100644
--- a/arch/arm64/Kconfig.debug
+++ b/arch/arm64/Kconfig.debug
@@ -8,21 +8,6 @@ config PID_IN_CONTEXTIDR
instructions during context switch. Say Y here only if you are
planning to use hardware trace tools with this kernel.
-config ARM64_RANDOMIZE_TEXT_OFFSET
- bool "Randomize TEXT_OFFSET at build time"
- help
- Say Y here if you want the image load offset (AKA TEXT_OFFSET)
- of the kernel to be randomized at build-time. When selected,
- this option will cause TEXT_OFFSET to be randomized upon any
- build of the kernel, and the offset will be reflected in the
- text_offset field of the resulting Image. This can be used to
- fuzz-test bootloaders which respect text_offset.
-
- This option is intended for bootloader and/or kernel testing
- only. Bootloaders must make no assumptions regarding the value
- of TEXT_OFFSET and platforms must not require a specific
- value.
-
config DEBUG_EFI
depends on EFI && DEBUG_INFO
bool "UEFI debugging"
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 76359cfb328a..a0d94d063fa8 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -121,13 +121,7 @@ endif
head-y := arch/arm64/kernel/head.o
# The byte offset of the kernel image in RAM from the start of RAM.
-ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
-TEXT_OFFSET := $(shell awk "BEGIN {srand(); printf \"0x%06x\n\", \
- int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \
- rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}")
-else
TEXT_OFFSET := 0x0
-endif
ifeq ($(CONFIG_KASAN_SW_TAGS), y)
KASAN_SHADOW_SCALE_SHIFT := 4
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 6dbd267ab931..758e2d1577d0 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -416,7 +416,7 @@ static inline pmd_t pmd_mkdevmap(pmd_t pmd)
__pgprot((pgprot_val(prot) & ~(mask)) | (bits))
#define pgprot_nx(prot) \
- __pgprot_modify(prot, 0, PTE_PXN)
+ __pgprot_modify(prot, PTE_MAYBE_GP, PTE_PXN)
/*
* Mark the prot value as uncacheable and unbufferable.
diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
index 35cb5e66c504..55c8f3ec6705 100644
--- a/arch/arm64/kernel/fpsimd.c
+++ b/arch/arm64/kernel/fpsimd.c
@@ -12,6 +12,7 @@
#include <linux/bug.h>
#include <linux/cache.h>
#include <linux/compat.h>
+#include <linux/compiler.h>
#include <linux/cpu.h>
#include <linux/cpu_pm.h>
#include <linux/kernel.h>
@@ -119,10 +120,20 @@ struct fpsimd_last_state_struct {
static DEFINE_PER_CPU(struct fpsimd_last_state_struct, fpsimd_last_state);
/* Default VL for tasks that don't set it explicitly: */
-static int sve_default_vl = -1;
+static int __sve_default_vl = -1;
+
+static int get_sve_default_vl(void)
+{
+ return READ_ONCE(__sve_default_vl);
+}
#ifdef CONFIG_ARM64_SVE
+static void set_sve_default_vl(int val)
+{
+ WRITE_ONCE(__sve_default_vl, val);
+}
+
/* Maximum supported vector length across all CPUs (initially poisoned) */
int __ro_after_init sve_max_vl = SVE_VL_MIN;
int __ro_after_init sve_max_virtualisable_vl = SVE_VL_MIN;
@@ -338,13 +349,13 @@ static unsigned int find_supported_vector_length(unsigned int vl)
return sve_vl_from_vq(__bit_to_vq(bit));
}
-#ifdef CONFIG_SYSCTL
+#if defined(CONFIG_ARM64_SVE) && defined(CONFIG_SYSCTL)
static int sve_proc_do_default_vl(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
int ret;
- int vl = sve_default_vl;
+ int vl = get_sve_default_vl();
struct ctl_table tmp_table = {
.data = &vl,
.maxlen = sizeof(vl),
@@ -361,7 +372,7 @@ static int sve_proc_do_default_vl(struct ctl_table *table, int write,
if (!sve_vl_valid(vl))
return -EINVAL;
- sve_default_vl = find_supported_vector_length(vl);
+ set_sve_default_vl(find_supported_vector_length(vl));
return 0;
}
@@ -383,9 +394,9 @@ static int __init sve_sysctl_init(void)
return 0;
}
-#else /* ! CONFIG_SYSCTL */
+#else /* ! (CONFIG_ARM64_SVE && CONFIG_SYSCTL) */
static int __init sve_sysctl_init(void) { return 0; }
-#endif /* ! CONFIG_SYSCTL */
+#endif /* ! (CONFIG_ARM64_SVE && CONFIG_SYSCTL) */
#define ZREG(sve_state, vq, n) ((char *)(sve_state) + \
(SVE_SIG_ZREG_OFFSET(vq, n) - SVE_SIG_REGS_OFFSET))
@@ -868,7 +879,7 @@ void __init sve_setup(void)
* For the default VL, pick the maximum supported value <= 64.
* VL == 64 is guaranteed not to grow the signal frame.
*/
- sve_default_vl = find_supported_vector_length(64);
+ set_sve_default_vl(find_supported_vector_length(64));
bitmap_andnot(tmp_map, sve_vq_partial_map, sve_vq_map,
SVE_VQ_MAX);
@@ -889,7 +900,7 @@ void __init sve_setup(void)
pr_info("SVE: maximum available vector length %u bytes per vector\n",
sve_max_vl);
pr_info("SVE: default vector length %u bytes per vector\n",
- sve_default_vl);
+ get_sve_default_vl());
/* KVM decides whether to support mismatched systems. Just warn here: */
if (sve_max_virtualisable_vl < sve_max_vl)
@@ -1029,13 +1040,13 @@ void fpsimd_flush_thread(void)
* vector length configured: no kernel task can become a user
* task without an exec and hence a call to this function.
* By the time the first call to this function is made, all
- * early hardware probing is complete, so sve_default_vl
+ * early hardware probing is complete, so __sve_default_vl
* should be valid.
* If a bug causes this to go wrong, we make some noise and
* try to fudge thread.sve_vl to a safe value here.
*/
vl = current->thread.sve_vl_onexec ?
- current->thread.sve_vl_onexec : sve_default_vl;
+ current->thread.sve_vl_onexec : get_sve_default_vl();
if (WARN_ON(!sve_vl_valid(vl)))
vl = SVE_VL_MIN;
diff --git a/arch/arm64/kernel/hw_breakpoint.c b/arch/arm64/kernel/hw_breakpoint.c
index 0b727edf4104..af234a1e08b7 100644
--- a/arch/arm64/kernel/hw_breakpoint.c
+++ b/arch/arm64/kernel/hw_breakpoint.c
@@ -730,6 +730,27 @@ static u64 get_distance_from_watchpoint(unsigned long addr, u64 val,
return 0;
}
+static int watchpoint_report(struct perf_event *wp, unsigned long addr,
+ struct pt_regs *regs)
+{
+ int step = is_default_overflow_handler(wp);
+ struct arch_hw_breakpoint *info = counter_arch_bp(wp);
+
+ info->trigger = addr;
+
+ /*
+ * If we triggered a user watchpoint from a uaccess routine, then
+ * handle the stepping ourselves since userspace really can't help
+ * us with this.
+ */
+ if (!user_mode(regs) && info->ctrl.privilege == AARCH64_BREAKPOINT_EL0)
+ step = 1;
+ else
+ perf_bp_event(wp, regs);
+
+ return step;
+}
+
static int watchpoint_handler(unsigned long addr, unsigned int esr,
struct pt_regs *regs)
{
@@ -739,7 +760,6 @@ static int watchpoint_handler(unsigned long addr, unsigned int esr,
u64 val;
struct perf_event *wp, **slots;
struct debug_info *debug_info;
- struct arch_hw_breakpoint *info;
struct arch_hw_breakpoint_ctrl ctrl;
slots = this_cpu_ptr(wp_on_reg);
@@ -777,25 +797,13 @@ static int watchpoint_handler(unsigned long addr, unsigned int esr,
if (dist != 0)
continue;
- info = counter_arch_bp(wp);
- info->trigger = addr;
- perf_bp_event(wp, regs);
-
- /* Do we need to handle the stepping? */
- if (is_default_overflow_handler(wp))
- step = 1;
+ step = watchpoint_report(wp, addr, regs);
}
- if (min_dist > 0 && min_dist != -1) {
- /* No exact match found. */
- wp = slots[closest_match];
- info = counter_arch_bp(wp);
- info->trigger = addr;
- perf_bp_event(wp, regs);
- /* Do we need to handle the stepping? */
- if (is_default_overflow_handler(wp))
- step = 1;
- }
+ /* No exact match found? */
+ if (min_dist > 0 && min_dist != -1)
+ step = watchpoint_report(slots[closest_match], addr, regs);
+
rcu_read_unlock();
if (!step)
diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c
index 684d871ae38d..a107375005bc 100644
--- a/arch/arm64/kernel/insn.c
+++ b/arch/arm64/kernel/insn.c
@@ -135,7 +135,7 @@ int __kprobes aarch64_insn_read(void *addr, u32 *insnp)
int ret;
__le32 val;
- ret = probe_kernel_read(&val, addr, AARCH64_INSN_SIZE);
+ ret = copy_from_kernel_nofault(&val, addr, AARCH64_INSN_SIZE);
if (!ret)
*insnp = le32_to_cpu(val);
@@ -151,7 +151,7 @@ static int __kprobes __aarch64_insn_write(void *addr, __le32 insn)
raw_spin_lock_irqsave(&patch_lock, flags);
waddr = patch_map(addr, FIX_TEXT_POKE0);
- ret = probe_kernel_write(waddr, &insn, AARCH64_INSN_SIZE);
+ ret = copy_to_kernel_nofault(waddr, &insn, AARCH64_INSN_SIZE);
patch_unmap(FIX_TEXT_POKE0);
raw_spin_unlock_irqrestore(&patch_lock, flags);
diff --git a/arch/arm64/kernel/machine_kexec_file.c b/arch/arm64/kernel/machine_kexec_file.c
index 522e6f517ec0..361a1143e09e 100644
--- a/arch/arm64/kernel/machine_kexec_file.c
+++ b/arch/arm64/kernel/machine_kexec_file.c
@@ -219,8 +219,7 @@ static int prepare_elf_headers(void **addr, unsigned long *sz)
MEMBLOCK_NONE, &start, &end, NULL)
nr_ranges++;
- cmem = kmalloc(sizeof(struct crash_mem) +
- sizeof(struct crash_mem_range) * nr_ranges, GFP_KERNEL);
+ cmem = kmalloc(struct_size(cmem, ranges, nr_ranges), GFP_KERNEL);
if (!cmem)
return -ENOMEM;
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index 50cc30acf106..47f651df781c 100644
--- a/arch/arm64/kernel/traps.c
+++ b/arch/arm64/kernel/traps.c
@@ -376,7 +376,7 @@ static int call_undef_hook(struct pt_regs *regs)
if (!user_mode(regs)) {
__le32 instr_le;
- if (probe_kernel_address((__force __le32 *)pc, instr_le))
+ if (get_kernel_nofault(instr_le, (__force __le32 *)pc))
goto exit;
instr = le32_to_cpu(instr_le);
} else if (compat_thumb_mode(regs)) {
@@ -813,6 +813,7 @@ asmlinkage void bad_mode(struct pt_regs *regs, int reason, unsigned int esr)
handler[reason], smp_processor_id(), esr,
esr_get_class_string(esr));
+ __show_regs(regs);
local_daif_mask();
panic("bad mode");
}
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index e631e6425165..1e93cfc7c47a 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -404,11 +404,6 @@ void __init arm64_memblock_init(void)
high_memory = __va(memblock_end_of_DRAM() - 1) + 1;
dma_contiguous_reserve(arm64_dma32_phys_limit);
-
-#ifdef CONFIG_ARM64_4K_PAGES
- hugetlb_cma_reserve(PUD_SHIFT - PAGE_SHIFT);
-#endif
-
}
void __init bootmem_init(void)
@@ -424,6 +419,16 @@ void __init bootmem_init(void)
min_low_pfn = min;
arm64_numa_init();
+
+ /*
+ * must be done after arm64_numa_init() which calls numa_init() to
+ * initialize node_online_map that gets used in hugetlb_cma_reserve()
+ * while allocating required CMA size across online nodes.
+ */
+#ifdef CONFIG_ARM64_4K_PAGES
+ hugetlb_cma_reserve(PUD_SHIFT - PAGE_SHIFT);
+#endif
+
/*
* Sparsemem tries to allocate bootmem in memory_present(), so must be
* done after the fixed reservations.
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 990929c8837e..1df25f26571d 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -723,6 +723,7 @@ int kern_addr_valid(unsigned long addr)
pmd_t *pmdp, pmd;
pte_t *ptep, pte;
+ addr = arch_kasan_reset_tag(addr);
if ((((long)addr) >> VA_BITS) != -1UL)
return 0;
diff --git a/arch/csky/kernel/ftrace.c b/arch/csky/kernel/ftrace.c
index 3c425b84e3be..b4a7ec1517ff 100644
--- a/arch/csky/kernel/ftrace.c
+++ b/arch/csky/kernel/ftrace.c
@@ -72,7 +72,8 @@ static int ftrace_check_current_nop(unsigned long hook)
uint16_t olds[7];
unsigned long hook_pos = hook - 2;
- if (probe_kernel_read((void *)olds, (void *)hook_pos, sizeof(nops)))
+ if (copy_from_kernel_nofault((void *)olds, (void *)hook_pos,
+ sizeof(nops)))
return -EFAULT;
if (memcmp((void *)nops, (void *)olds, sizeof(nops))) {
@@ -97,7 +98,7 @@ static int ftrace_modify_code(unsigned long hook, unsigned long target,
make_jbsr(target, hook, call, nolr);
- ret = probe_kernel_write((void *)hook_pos, enable ? call : nops,
+ ret = copy_to_kernel_nofault((void *)hook_pos, enable ? call : nops,
sizeof(nops));
if (ret)
return -EPERM;
diff --git a/arch/ia64/include/asm/sections.h b/arch/ia64/include/asm/sections.h
index cea15f2dd38d..3a033d2008b3 100644
--- a/arch/ia64/include/asm/sections.h
+++ b/arch/ia64/include/asm/sections.h
@@ -35,7 +35,7 @@ static inline void *dereference_function_descriptor(void *ptr)
struct fdesc *desc = ptr;
void *p;
- if (!probe_kernel_address(&desc->ip, p))
+ if (!get_kernel_nofault(p, (void *)&desc->ip))
ptr = p;
return ptr;
}
diff --git a/arch/ia64/kernel/ftrace.c b/arch/ia64/kernel/ftrace.c
index cee411e647ca..b2ab2d58fb30 100644
--- a/arch/ia64/kernel/ftrace.c
+++ b/arch/ia64/kernel/ftrace.c
@@ -108,7 +108,7 @@ ftrace_modify_code(unsigned long ip, unsigned char *old_code,
goto skip_check;
/* read the text we want to modify */
- if (probe_kernel_read(replaced, (void *)ip, MCOUNT_INSN_SIZE))
+ if (copy_from_kernel_nofault(replaced, (void *)ip, MCOUNT_INSN_SIZE))
return -EFAULT;
/* Make sure it is what we expect it to be */
@@ -117,7 +117,7 @@ ftrace_modify_code(unsigned long ip, unsigned char *old_code,
skip_check:
/* replace the text with the new text */
- if (probe_kernel_write(((void *)ip), new_code, MCOUNT_INSN_SIZE))
+ if (copy_to_kernel_nofault(((void *)ip), new_code, MCOUNT_INSN_SIZE))
return -EPERM;
flush_icache_range(ip, ip + MCOUNT_INSN_SIZE);
@@ -129,7 +129,7 @@ static int ftrace_make_nop_check(struct dyn_ftrace *rec, unsigned long addr)
unsigned char __attribute__((aligned(8))) replaced[MCOUNT_INSN_SIZE];
unsigned long ip = rec->ip;
- if (probe_kernel_read(replaced, (void *)ip, MCOUNT_INSN_SIZE))
+ if (copy_from_kernel_nofault(replaced, (void *)ip, MCOUNT_INSN_SIZE))
return -EFAULT;
if (rec->flags & FTRACE_FL_CONVERTED) {
struct ftrace_call_insn *call_insn, *tmp_call;
diff --git a/arch/ia64/kernel/unwind_i.h b/arch/ia64/kernel/unwind_i.h
index 67994a7e5816..1dd57ba44327 100644
--- a/arch/ia64/kernel/unwind_i.h
+++ b/arch/ia64/kernel/unwind_i.h
@@ -42,7 +42,7 @@ enum unw_register_index {
struct unw_info_block {
u64 header;
- u64 desc[0]; /* unwind descriptors */
+ u64 desc[]; /* unwind descriptors */
/* personality routine and language-specific data follow behind descriptors */
};
diff --git a/arch/mips/kernel/kprobes.c b/arch/mips/kernel/kprobes.c
index 6cfae2411c04..d043c2f897fc 100644
--- a/arch/mips/kernel/kprobes.c
+++ b/arch/mips/kernel/kprobes.c
@@ -86,9 +86,9 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
goto out;
}
- if ((probe_kernel_read(&prev_insn, p->addr - 1,
- sizeof(mips_instruction)) == 0) &&
- insn_has_delayslot(prev_insn)) {
+ if (copy_from_kernel_nofault(&prev_insn, p->addr - 1,
+ sizeof(mips_instruction)) == 0 &&
+ insn_has_delayslot(prev_insn)) {
pr_notice("Kprobes for branch delayslot are not supported\n");
ret = -EINVAL;
goto out;
diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
index 521bd5891e84..666d3350b4ac 100644
--- a/arch/mips/kvm/mips.c
+++ b/arch/mips/kvm/mips.c
@@ -67,8 +67,10 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
VCPU_STAT("vz_ghfc", vz_ghfc_exits),
VCPU_STAT("vz_gpa", vz_gpa_exits),
VCPU_STAT("vz_resvd", vz_resvd_exits),
+#ifdef CONFIG_CPU_LOONGSON64
VCPU_STAT("vz_cpucfg", vz_cpucfg_exits),
#endif
+#endif
VCPU_STAT("halt_successful_poll", halt_successful_poll),
VCPU_STAT("halt_attempted_poll", halt_attempted_poll),
VCPU_STAT("halt_poll_invalid", halt_poll_invalid),
diff --git a/arch/nds32/kernel/ftrace.c b/arch/nds32/kernel/ftrace.c
index 22ab77ea27ad..3763b3f8c3db 100644
--- a/arch/nds32/kernel/ftrace.c
+++ b/arch/nds32/kernel/ftrace.c
@@ -131,13 +131,14 @@ static int __ftrace_modify_code(unsigned long pc, unsigned long *old_insn,
unsigned long orig_insn[3];
if (validate) {
- if (probe_kernel_read(orig_insn, (void *)pc, MCOUNT_INSN_SIZE))
+ if (copy_from_kernel_nofault(orig_insn, (void *)pc,
+ MCOUNT_INSN_SIZE))
return -EFAULT;
if (memcmp(orig_insn, old_insn, MCOUNT_INSN_SIZE))
return -EINVAL;
}
- if (probe_kernel_write((void *)pc, new_insn, MCOUNT_INSN_SIZE))
+ if (copy_to_kernel_nofault((void *)pc, new_insn, MCOUNT_INSN_SIZE))
return -EPERM;
return 0;
diff --git a/arch/parisc/kernel/ftrace.c b/arch/parisc/kernel/ftrace.c
index b836fc61a24f..1df0f67ed667 100644
--- a/arch/parisc/kernel/ftrace.c
+++ b/arch/parisc/kernel/ftrace.c
@@ -172,7 +172,7 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
ip = (void *)(rec->ip + 4 - size);
- ret = probe_kernel_read(insn, ip, size);
+ ret = copy_from_kernel_nofault(insn, ip, size);
if (ret)
return ret;
diff --git a/arch/parisc/kernel/kgdb.c b/arch/parisc/kernel/kgdb.c
index 664278db9b97..c4554ac13eac 100644
--- a/arch/parisc/kernel/kgdb.c
+++ b/arch/parisc/kernel/kgdb.c
@@ -154,8 +154,8 @@ void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long ip)
int kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt)
{
- int ret = probe_kernel_read(bpt->saved_instr, (char *)bpt->bpt_addr,
- BREAK_INSTR_SIZE);
+ int ret = copy_from_kernel_nofault(bpt->saved_instr,
+ (char *)bpt->bpt_addr, BREAK_INSTR_SIZE);
if (ret)
return ret;
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index 230a6422b99f..b7abb12edd3a 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -293,7 +293,7 @@ void *dereference_function_descriptor(void *ptr)
Elf64_Fdesc *desc = ptr;
void *p;
- if (!probe_kernel_address(&desc->addr, p))
+ if (!get_kernel_nofault(p, (void *)&desc->addr))
ptr = p;
return ptr;
}
diff --git a/arch/parisc/lib/memcpy.c b/arch/parisc/lib/memcpy.c
index 94a9fe2702c2..4b75388190b4 100644
--- a/arch/parisc/lib/memcpy.c
+++ b/arch/parisc/lib/memcpy.c
@@ -57,7 +57,7 @@ void * memcpy(void * dst,const void *src, size_t count)
EXPORT_SYMBOL(raw_copy_in_user);
EXPORT_SYMBOL(memcpy);
-bool probe_kernel_read_allowed(const void *unsafe_src, size_t size)
+bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size)
{
if ((unsigned long)unsafe_src < PAGE_SIZE)
return false;
diff --git a/arch/powerpc/include/asm/nohash/32/pgtable.h b/arch/powerpc/include/asm/nohash/32/pgtable.h
index b56f14160ae5..b0afbdd07740 100644
--- a/arch/powerpc/include/asm/nohash/32/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/32/pgtable.h
@@ -205,10 +205,6 @@ static inline void pmd_clear(pmd_t *pmdp)
*pmdp = __pmd(0);
}
-/* to find an entry in a page-table-directory */
-#define pgd_index(address) ((address) >> PGDIR_SHIFT)
-#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
-
/*
* PTE updates. This function is called whenever an existing
* valid PTE is updated. This does -not- include set_pte_at()
@@ -230,6 +226,8 @@ static inline void pmd_clear(pmd_t *pmdp)
* For other page sizes, we have a single entry in the table.
*/
#ifdef CONFIG_PPC_8xx
+static pmd_t *pmd_off(struct mm_struct *mm, unsigned long addr);
+
static inline pte_basic_t pte_update(struct mm_struct *mm, unsigned long addr, pte_t *p,
unsigned long clr, unsigned long set, int huge)
{
@@ -237,7 +235,7 @@ static inline pte_basic_t pte_update(struct mm_struct *mm, unsigned long addr, p
pte_basic_t old = pte_val(*p);
pte_basic_t new = (old & ~(pte_basic_t)clr) | set;
int num, i;
- pmd_t *pmd = pmd_offset(pud_offset(p4d_offset(pgd_offset(mm, addr), addr), addr), addr);
+ pmd_t *pmd = pmd_off(mm, addr);
if (!huge)
num = PAGE_SIZE / SZ_4K;
@@ -286,6 +284,16 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
return __pte(pte_update(mm, addr, ptep, ~0, 0, 0));
}
+#if defined(CONFIG_PPC_8xx) && defined(CONFIG_PPC_16K_PAGES)
+#define __HAVE_ARCH_PTEP_GET
+static inline pte_t ptep_get(pte_t *ptep)
+{
+ pte_t pte = {READ_ONCE(ptep->pte), 0, 0, 0};
+
+ return pte;
+}
+#endif
+
#define __HAVE_ARCH_PTEP_SET_WRPROTECT
static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
pte_t *ptep)
diff --git a/arch/powerpc/include/asm/sections.h b/arch/powerpc/include/asm/sections.h
index d19871763ed4..324d7b298ec3 100644
--- a/arch/powerpc/include/asm/sections.h
+++ b/arch/powerpc/include/asm/sections.h
@@ -85,7 +85,7 @@ static inline void *dereference_function_descriptor(void *ptr)
struct ppc64_opd_entry *desc = ptr;
void *p;
- if (!probe_kernel_address(&desc->funcaddr, p))
+ if (!get_kernel_nofault(p, (void *)&desc->funcaddr))
ptr = p;
return ptr;
}
diff --git a/arch/powerpc/include/uapi/asm/papr_pdsm.h b/arch/powerpc/include/uapi/asm/papr_pdsm.h
new file mode 100644
index 000000000000..9ccecc1d6840
--- /dev/null
+++ b/arch/powerpc/include/uapi/asm/papr_pdsm.h
@@ -0,0 +1,132 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * PAPR nvDimm Specific Methods (PDSM) and structs for libndctl
+ *
+ * (C) Copyright IBM 2020
+ *
+ * Author: Vaibhav Jain <vaibhav at linux.ibm.com>
+ */
+
+#ifndef _UAPI_ASM_POWERPC_PAPR_PDSM_H_
+#define _UAPI_ASM_POWERPC_PAPR_PDSM_H_
+
+#include <linux/types.h>
+#include <linux/ndctl.h>
+
+/*
+ * PDSM Envelope:
+ *
+ * The ioctl ND_CMD_CALL exchange data between user-space and kernel via
+ * envelope which consists of 2 headers sections and payload sections as
+ * illustrated below:
+ * +-----------------+---------------+---------------------------+
+ * | 64-Bytes | 8-Bytes | Max 184-Bytes |
+ * +-----------------+---------------+---------------------------+
+ * | ND-HEADER | PDSM-HEADER | PDSM-PAYLOAD |
+ * +-----------------+---------------+---------------------------+
+ * | nd_family | | |
+ * | nd_size_out | cmd_status | |
+ * | nd_size_in | reserved | nd_pdsm_payload |
+ * | nd_command | payload --> | |
+ * | nd_fw_size | | |
+ * | nd_payload ---> | | |
+ * +---------------+-----------------+---------------------------+
+ *
+ * ND Header:
+ * This is the generic libnvdimm header described as 'struct nd_cmd_pkg'
+ * which is interpreted by libnvdimm before passed on to papr_scm. Important
+ * member fields used are:
+ * 'nd_family' : (In) NVDIMM_FAMILY_PAPR_SCM
+ * 'nd_size_in' : (In) PDSM-HEADER + PDSM-IN-PAYLOAD (usually 0)
+ * 'nd_size_out' : (In) PDSM-HEADER + PDSM-RETURN-PAYLOAD
+ * 'nd_command' : (In) One of PAPR_PDSM_XXX
+ * 'nd_fw_size' : (Out) PDSM-HEADER + size of actual payload returned
+ *
+ * PDSM Header:
+ * This is papr-scm specific header that precedes the payload. This is defined
+ * as nd_cmd_pdsm_pkg. Following fields aare available in this header:
+ *
+ * 'cmd_status' : (Out) Errors if any encountered while servicing PDSM.
+ * 'reserved' : Not used, reserved for future and should be set to 0.
+ * 'payload' : A union of all the possible payload structs
+ *
+ * PDSM Payload:
+ *
+ * The layout of the PDSM Payload is defined by various structs shared between
+ * papr_scm and libndctl so that contents of payload can be interpreted. As such
+ * its defined as a union of all possible payload structs as
+ * 'union nd_pdsm_payload'. Based on the value of 'nd_cmd_pkg.nd_command'
+ * appropriate member of the union is accessed.
+ */
+
+/* Max payload size that we can handle */
+#define ND_PDSM_PAYLOAD_MAX_SIZE 184
+
+/* Max payload size that we can handle */
+#define ND_PDSM_HDR_SIZE \
+ (sizeof(struct nd_pkg_pdsm) - ND_PDSM_PAYLOAD_MAX_SIZE)
+
+/* Various nvdimm health indicators */
+#define PAPR_PDSM_DIMM_HEALTHY 0
+#define PAPR_PDSM_DIMM_UNHEALTHY 1
+#define PAPR_PDSM_DIMM_CRITICAL 2
+#define PAPR_PDSM_DIMM_FATAL 3
+
+/*
+ * Struct exchanged between kernel & ndctl in for PAPR_PDSM_HEALTH
+ * Various flags indicate the health status of the dimm.
+ *
+ * extension_flags : Any extension fields present in the struct.
+ * dimm_unarmed : Dimm not armed. So contents wont persist.
+ * dimm_bad_shutdown : Previous shutdown did not persist contents.
+ * dimm_bad_restore : Contents from previous shutdown werent restored.
+ * dimm_scrubbed : Contents of the dimm have been scrubbed.
+ * dimm_locked : Contents of the dimm cant be modified until CEC reboot
+ * dimm_encrypted : Contents of dimm are encrypted.
+ * dimm_health : Dimm health indicator. One of PAPR_PDSM_DIMM_XXXX
+ */
+struct nd_papr_pdsm_health {
+ union {
+ struct {
+ __u32 extension_flags;
+ __u8 dimm_unarmed;
+ __u8 dimm_bad_shutdown;
+ __u8 dimm_bad_restore;
+ __u8 dimm_scrubbed;
+ __u8 dimm_locked;
+ __u8 dimm_encrypted;
+ __u16 dimm_health;
+ };
+ __u8 buf[ND_PDSM_PAYLOAD_MAX_SIZE];
+ };
+};
+
+/*
+ * Methods to be embedded in ND_CMD_CALL request. These are sent to the kernel
+ * via 'nd_cmd_pkg.nd_command' member of the ioctl struct
+ */
+enum papr_pdsm {
+ PAPR_PDSM_MIN = 0x0,
+ PAPR_PDSM_HEALTH,
+ PAPR_PDSM_MAX,
+};
+
+/* Maximal union that can hold all possible payload types */
+union nd_pdsm_payload {
+ struct nd_papr_pdsm_health health;
+ __u8 buf[ND_PDSM_PAYLOAD_MAX_SIZE];
+} __packed;
+
+/*
+ * PDSM-header + payload expected with ND_CMD_CALL ioctl from libnvdimm
+ * Valid member of union 'payload' is identified via 'nd_cmd_pkg.nd_command'
+ * that should always precede this struct when sent to papr_scm via CMD_CALL
+ * interface.
+ */
+struct nd_pkg_pdsm {
+ __s32 cmd_status; /* Out: Sub-cmd status returned back */
+ __u16 reserved[2]; /* Ignored and to be set as '0' */
+ union nd_pdsm_payload payload;
+} __packed;
+
+#endif /* _UAPI_ASM_POWERPC_PAPR_PDSM_H_ */
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index e70ebb5c318c..fa080694e581 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -270,7 +270,7 @@ BEGIN_FTR_SECTION
END_FTR_SECTION_IFSET(CPU_FTR_CFAR)
.endif
- ld r10,PACA_EXGEN+EX_CTR(r13)
+ ld r10,IAREA+EX_CTR(r13)
mtctr r10
BEGIN_FTR_SECTION
ld r10,IAREA+EX_PPR(r13)
@@ -298,7 +298,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
.if IKVM_SKIP
89: mtocrf 0x80,r9
- ld r10,PACA_EXGEN+EX_CTR(r13)
+ ld r10,IAREA+EX_CTR(r13)
mtctr r10
ld r9,IAREA+EX_R9(r13)
ld r10,IAREA+EX_R10(r13)
diff --git a/arch/powerpc/kernel/kgdb.c b/arch/powerpc/kernel/kgdb.c
index 652b2852bea3..409080208a6c 100644
--- a/arch/powerpc/kernel/kgdb.c
+++ b/arch/powerpc/kernel/kgdb.c
@@ -421,7 +421,7 @@ int kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt)
unsigned int instr;
struct ppc_inst *addr = (struct ppc_inst *)bpt->bpt_addr;
- err = probe_kernel_address(addr, instr);
+ err = get_kernel_nofault(instr, (unsigned *) addr);
if (err)
return err;
diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c
index 6f96f65ebfe8..9cc792a3a6a9 100644
--- a/arch/powerpc/kernel/kprobes.c
+++ b/arch/powerpc/kernel/kprobes.c
@@ -289,7 +289,7 @@ int kprobe_handler(struct pt_regs *regs)
if (!p) {
unsigned int instr;
- if (probe_kernel_address(addr, instr))
+ if (get_kernel_nofault(instr, addr))
goto no_kprobe;
if (instr != BREAKPOINT_INSTRUCTION) {
diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c
index f4c2fa190192..ae2b188365b1 100644
--- a/arch/powerpc/kernel/module_64.c
+++ b/arch/powerpc/kernel/module_64.c
@@ -756,7 +756,8 @@ int module_trampoline_target(struct module *mod, unsigned long addr,
stub = (struct ppc64_stub_entry *)addr;
- if (probe_kernel_read(&magic, &stub->magic, sizeof(magic))) {
+ if (copy_from_kernel_nofault(&magic, &stub->magic,
+ sizeof(magic))) {
pr_err("%s: fault reading magic for stub %lx for %s\n", __func__, addr, mod->name);
return -EFAULT;
}
@@ -766,7 +767,8 @@ int module_trampoline_target(struct module *mod, unsigned long addr,
return -EFAULT;
}
- if (probe_kernel_read(&funcdata, &stub->funcdata, sizeof(funcdata))) {
+ if (copy_from_kernel_nofault(&funcdata, &stub->funcdata,
+ sizeof(funcdata))) {
pr_err("%s: fault reading funcdata for stub %lx for %s\n", __func__, addr, mod->name);
return -EFAULT;
}
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 7bb7faf84490..4650b9bb217f 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1252,29 +1252,31 @@ struct task_struct *__switch_to(struct task_struct *prev,
static void show_instructions(struct pt_regs *regs)
{
int i;
+ unsigned long nip = regs->nip;
unsigned long pc = regs->nip - (NR_INSN_TO_PRINT * 3 / 4 * sizeof(int));
printk("Instruction dump:");
+ /*
+ * If we were executing with the MMU off for instructions, adjust pc
+ * rather than printing XXXXXXXX.
+ */
+ if (!IS_ENABLED(CONFIG_BOOKE) && !(regs->msr & MSR_IR)) {
+ pc = (unsigned long)phys_to_virt(pc);
+ nip = (unsigned long)phys_to_virt(regs->nip);
+ }
+
for (i = 0; i < NR_INSN_TO_PRINT; i++) {
int instr;
if (!(i % 8))
pr_cont("\n");
-#if !defined(CONFIG_BOOKE)
- /* If executing with the IMMU off, adjust pc rather
- * than print XXXXXXXX.
- */
- if (!(regs->msr & MSR_IR))
- pc = (unsigned long)phys_to_virt(pc);
-#endif
-
if (!__kernel_text_address(pc) ||
- probe_kernel_address((const void *)pc, instr)) {
+ get_kernel_nofault(instr, (const void *)pc)) {
pr_cont("XXXXXXXX ");
} else {
- if (regs->nip == pc)
+ if (nip == pc)
pr_cont("<%08x> ", instr);
else
pr_cont("%08x ", instr);
@@ -1305,7 +1307,8 @@ void show_user_instructions(struct pt_regs *regs)
for (i = 0; i < 8 && n; i++, n--, pc += sizeof(int)) {
int instr;
- if (probe_user_read(&instr, (void __user *)pc, sizeof(instr))) {
+ if (copy_from_user_nofault(&instr, (void __user *)pc,
+ sizeof(instr))) {
seq_buf_printf(&s, "XXXXXXXX ");
continue;
}
diff --git a/arch/powerpc/kernel/trace/ftrace.c b/arch/powerpc/kernel/trace/ftrace.c
index 5e399628f51a..c1fede6ec934 100644
--- a/arch/powerpc/kernel/trace/ftrace.c
+++ b/arch/powerpc/kernel/trace/ftrace.c
@@ -226,7 +226,7 @@ __ftrace_make_nop(struct module *mod,
unsigned long ip = rec->ip;
unsigned long tramp;
- if (probe_kernel_read(&op, (void *)ip, MCOUNT_INSN_SIZE))
+ if (copy_from_kernel_nofault(&op, (void *)ip, MCOUNT_INSN_SIZE))
return -EFAULT;
/* Make sure that that this is still a 24bit jump */
@@ -249,7 +249,7 @@ __ftrace_make_nop(struct module *mod,
pr_devel("ip:%lx jumps to %lx", ip, tramp);
/* Find where the trampoline jumps to */
- if (probe_kernel_read(jmp, (void *)tramp, sizeof(jmp))) {
+ if (copy_from_kernel_nofault(jmp, (void *)tramp, sizeof(jmp))) {
pr_err("Failed to read %lx\n", tramp);
return -EFAULT;
}
diff --git a/arch/powerpc/kvm/book3s_64_mmu_radix.c b/arch/powerpc/kvm/book3s_64_mmu_radix.c
index 3cb0c9843d01..e738ea652192 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_radix.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_radix.c
@@ -64,9 +64,9 @@ unsigned long __kvmhv_copy_tofrom_guest_radix(int lpid, int pid,
isync();
if (is_load)
- ret = probe_user_read(to, (const void __user *)from, n);
+ ret = copy_from_user_nofault(to, (const void __user *)from, n);
else
- ret = probe_user_write((void __user *)to, from, n);
+ ret = copy_to_user_nofault((void __user *)to, from, n);
/* switch the pid first to avoid running host with unallocated pid */
if (quadrant == 1 && pid != old_pid)
diff --git a/arch/powerpc/lib/inst.c b/arch/powerpc/lib/inst.c
index aedfd6e31e53..9cc17eb62462 100644
--- a/arch/powerpc/lib/inst.c
+++ b/arch/powerpc/lib/inst.c
@@ -15,11 +15,11 @@ int probe_user_read_inst(struct ppc_inst *inst,
unsigned int val, suffix;
int err;
- err = probe_user_read(&val, nip, sizeof(val));
+ err = copy_from_user_nofault(&val, nip, sizeof(val));
if (err)
return err;
if (get_op(val) == OP_PREFIX) {
- err = probe_user_read(&suffix, (void __user *)nip + 4, 4);
+ err = copy_from_user_nofault(&suffix, (void __user *)nip + 4, 4);
*inst = ppc_inst_prefix(val, suffix);
} else {
*inst = ppc_inst(val);
@@ -33,11 +33,11 @@ int probe_kernel_read_inst(struct ppc_inst *inst,
unsigned int val, suffix;
int err;
- err = probe_kernel_read(&val, src, sizeof(val));
+ err = copy_from_kernel_nofault(&val, src, sizeof(val));
if (err)
return err;
if (get_op(val) == OP_PREFIX) {
- err = probe_kernel_read(&suffix, (void *)src + 4, 4);
+ err = copy_from_kernel_nofault(&suffix, (void *)src + 4, 4);
*inst = ppc_inst_prefix(val, suffix);
} else {
*inst = ppc_inst(val);
@@ -51,7 +51,7 @@ int probe_user_read_inst(struct ppc_inst *inst,
unsigned int val;
int err;
- err = probe_user_read(&val, nip, sizeof(val));
+ err = copy_from_user_nofault(&val, nip, sizeof(val));
if (!err)
*inst = ppc_inst(val);
@@ -64,7 +64,7 @@ int probe_kernel_read_inst(struct ppc_inst *inst,
unsigned int val;
int err;
- err = probe_kernel_read(&val, src, sizeof(val));
+ err = copy_from_kernel_nofault(&val, src, sizeof(val));
if (!err)
*inst = ppc_inst(val);
diff --git a/arch/powerpc/oprofile/backtrace.c b/arch/powerpc/oprofile/backtrace.c
index 6f347fa29f41..9db7ada79d10 100644
--- a/arch/powerpc/oprofile/backtrace.c
+++ b/arch/powerpc/oprofile/backtrace.c
@@ -33,7 +33,8 @@ static unsigned int user_getsp32(unsigned int sp, int is_first)
* which means that we've done all that we can do from
* interrupt context.
*/
- if (probe_user_read(stack_frame, (void __user *)p, sizeof(stack_frame)))
+ if (copy_from_user_nofault(stack_frame, (void __user *)p,
+ sizeof(stack_frame)))
return 0;
if (!is_first)
@@ -51,7 +52,8 @@ static unsigned long user_getsp64(unsigned long sp, int is_first)
{
unsigned long stack_frame[3];
- if (probe_user_read(stack_frame, (void __user *)sp, sizeof(stack_frame)))
+ if (copy_from_user_nofault(stack_frame, (void __user *)sp,
+ sizeof(stack_frame)))
return 0;
if (!is_first)
diff --git a/arch/powerpc/perf/callchain_32.c b/arch/powerpc/perf/callchain_32.c
index f7d888d39cd3..542e68b8eae0 100644
--- a/arch/powerpc/perf/callchain_32.c
+++ b/arch/powerpc/perf/callchain_32.c
@@ -44,7 +44,7 @@ static int read_user_stack_32(unsigned int __user *ptr, unsigned int *ret)
((unsigned long)ptr & 3))
return -EFAULT;
- rc = probe_user_read(ret, ptr, sizeof(*ret));
+ rc = copy_from_user_nofault(ret, ptr, sizeof(*ret));
if (IS_ENABLED(CONFIG_PPC64) && rc)
return read_user_stack_slow(ptr, ret, 4);
diff --git a/arch/powerpc/perf/callchain_64.c b/arch/powerpc/perf/callchain_64.c
index 814d1c2c2b9c..fa2a1b83b9b0 100644
--- a/arch/powerpc/perf/callchain_64.c
+++ b/arch/powerpc/perf/callchain_64.c
@@ -50,7 +50,7 @@ static int read_user_stack_64(unsigned long __user *ptr, unsigned long *ret)
((unsigned long)ptr & 7))
return -EFAULT;
- if (!probe_user_read(ret, ptr, sizeof(*ret)))
+ if (!copy_from_user_nofault(ret, ptr, sizeof(*ret)))
return 0;
return read_user_stack_slow(ptr, ret, 8);
diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index 13b9dd5e4a76..cd6a742ac6ef 100644
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -418,14 +418,16 @@ static __u64 power_pmu_bhrb_to(u64 addr)
__u64 target;
if (is_kernel_addr(addr)) {
- if (probe_kernel_read(&instr, (void *)addr, sizeof(instr)))
+ if (copy_from_kernel_nofault(&instr, (void *)addr,
+ sizeof(instr)))
return 0;
return branch_target((struct ppc_inst *)&instr);
}
/* Userspace: need copy instruction here then translate it */
- if (probe_user_read(&instr, (unsigned int __user *)addr, sizeof(instr)))
+ if (copy_from_user_nofault(&instr, (unsigned int __user *)addr,
+ sizeof(instr)))
return 0;
target = branch_target((struct ppc_inst *)&instr);
diff --git a/arch/powerpc/platforms/cell/spu_callbacks.c b/arch/powerpc/platforms/cell/spu_callbacks.c
index cbee3666da07..abdef9bcf432 100644
--- a/arch/powerpc/platforms/cell/spu_callbacks.c
+++ b/arch/powerpc/platforms/cell/spu_callbacks.c
@@ -35,7 +35,7 @@
*/
static void *spu_syscall_table[] = {
-#define __SYSCALL(nr, entry) entry,
+#define __SYSCALL(nr, entry) [nr] = entry,
#include <asm/syscall_table_spu.h>
#undef __SYSCALL
};
diff --git a/arch/powerpc/platforms/pseries/papr_scm.c b/arch/powerpc/platforms/pseries/papr_scm.c
index f35592423380..9c569078a09f 100644
--- a/arch/powerpc/platforms/pseries/papr_scm.c
+++ b/arch/powerpc/platforms/pseries/papr_scm.c
@@ -12,16 +12,57 @@
#include <linux/libnvdimm.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
+#include <linux/seq_buf.h>
#include <asm/plpar_wrappers.h>
+#include <asm/papr_pdsm.h>
#define BIND_ANY_ADDR (~0ul)
#define PAPR_SCM_DIMM_CMD_MASK \
((1ul << ND_CMD_GET_CONFIG_SIZE) | \
(1ul << ND_CMD_GET_CONFIG_DATA) | \
- (1ul << ND_CMD_SET_CONFIG_DATA))
-
+ (1ul << ND_CMD_SET_CONFIG_DATA) | \
+ (1ul << ND_CMD_CALL))
+
+/* DIMM health bitmap bitmap indicators */
+/* SCM device is unable to persist memory contents */
+#define PAPR_PMEM_UNARMED (1ULL << (63 - 0))
+/* SCM device failed to persist memory contents */
+#define PAPR_PMEM_SHUTDOWN_DIRTY (1ULL << (63 - 1))
+/* SCM device contents are persisted from previous IPL */
+#define PAPR_PMEM_SHUTDOWN_CLEAN (1ULL << (63 - 2))
+/* SCM device contents are not persisted from previous IPL */
+#define PAPR_PMEM_EMPTY (1ULL << (63 - 3))
+/* SCM device memory life remaining is critically low */
+#define PAPR_PMEM_HEALTH_CRITICAL (1ULL << (63 - 4))
+/* SCM device will be garded off next IPL due to failure */
+#define PAPR_PMEM_HEALTH_FATAL (1ULL << (63 - 5))
+/* SCM contents cannot persist due to current platform health status */
+#define PAPR_PMEM_HEALTH_UNHEALTHY (1ULL << (63 - 6))
+/* SCM device is unable to persist memory contents in certain conditions */
+#define PAPR_PMEM_HEALTH_NON_CRITICAL (1ULL << (63 - 7))
+/* SCM device is encrypted */
+#define PAPR_PMEM_ENCRYPTED (1ULL << (63 - 8))
+/* SCM device has been scrubbed and locked */
+#define PAPR_PMEM_SCRUBBED_AND_LOCKED (1ULL << (63 - 9))
+
+/* Bits status indicators for health bitmap indicating unarmed dimm */
+#define PAPR_PMEM_UNARMED_MASK (PAPR_PMEM_UNARMED | \
+ PAPR_PMEM_HEALTH_UNHEALTHY)
+
+/* Bits status indicators for health bitmap indicating unflushed dimm */
+#define PAPR_PMEM_BAD_SHUTDOWN_MASK (PAPR_PMEM_SHUTDOWN_DIRTY)
+
+/* Bits status indicators for health bitmap indicating unrestored dimm */
+#define PAPR_PMEM_BAD_RESTORE_MASK (PAPR_PMEM_EMPTY)
+
+/* Bit status indicators for smart event notification */
+#define PAPR_PMEM_SMART_EVENT_MASK (PAPR_PMEM_HEALTH_CRITICAL | \
+ PAPR_PMEM_HEALTH_FATAL | \
+ PAPR_PMEM_HEALTH_UNHEALTHY)
+
+/* private struct associated with each region */
struct papr_scm_priv {
struct platform_device *pdev;
struct device_node *dn;
@@ -39,6 +80,15 @@ struct papr_scm_priv {
struct resource res;
struct nd_region *region;
struct nd_interleave_set nd_set;
+
+ /* Protect dimm health data from concurrent read/writes */
+ struct mutex health_mutex;
+
+ /* Last time the health information of the dimm was updated */
+ unsigned long lasthealth_jiffies;
+
+ /* Health information for the dimm */
+ u64 health_bitmap;
};
static int drc_pmem_bind(struct papr_scm_priv *p)
@@ -144,6 +194,61 @@ err_out:
return drc_pmem_bind(p);
}
+/*
+ * Issue hcall to retrieve dimm health info and populate papr_scm_priv with the
+ * health information.
+ */
+static int __drc_pmem_query_health(struct papr_scm_priv *p)
+{
+ unsigned long ret[PLPAR_HCALL_BUFSIZE];
+ long rc;
+
+ /* issue the hcall */
+ rc = plpar_hcall(H_SCM_HEALTH, ret, p->drc_index);
+ if (rc != H_SUCCESS) {
+ dev_err(&p->pdev->dev,
+ "Failed to query health information, Err:%ld\n", rc);
+ return -ENXIO;
+ }
+
+ p->lasthealth_jiffies = jiffies;
+ p->health_bitmap = ret[0] & ret[1];
+
+ dev_dbg(&p->pdev->dev,
+ "Queried dimm health info. Bitmap:0x%016lx Mask:0x%016lx\n",
+ ret[0], ret[1]);
+
+ return 0;
+}
+
+/* Min interval in seconds for assuming stable dimm health */
+#define MIN_HEALTH_QUERY_INTERVAL 60
+
+/* Query cached health info and if needed call drc_pmem_query_health */
+static int drc_pmem_query_health(struct papr_scm_priv *p)
+{
+ unsigned long cache_timeout;
+ int rc;
+
+ /* Protect concurrent modifications to papr_scm_priv */
+ rc = mutex_lock_interruptible(&p->health_mutex);
+ if (rc)
+ return rc;
+
+ /* Jiffies offset for which the health data is assumed to be same */
+ cache_timeout = p->lasthealth_jiffies +
+ msecs_to_jiffies(MIN_HEALTH_QUERY_INTERVAL * 1000);
+
+ /* Fetch new health info is its older than MIN_HEALTH_QUERY_INTERVAL */
+ if (time_after(jiffies, cache_timeout))
+ rc = __drc_pmem_query_health(p);
+ else
+ /* Assume cached health data is valid */
+ rc = 0;
+
+ mutex_unlock(&p->health_mutex);
+ return rc;
+}
static int papr_scm_meta_get(struct papr_scm_priv *p,
struct nd_cmd_get_config_data_hdr *hdr)
@@ -246,16 +351,250 @@ static int papr_scm_meta_set(struct papr_scm_priv *p,
return 0;
}
+/*
+ * Do a sanity checks on the inputs args to dimm-control function and return
+ * '0' if valid. Validation of PDSM payloads happens later in
+ * papr_scm_service_pdsm.
+ */
+static int is_cmd_valid(struct nvdimm *nvdimm, unsigned int cmd, void *buf,
+ unsigned int buf_len)
+{
+ unsigned long cmd_mask = PAPR_SCM_DIMM_CMD_MASK;
+ struct nd_cmd_pkg *nd_cmd;
+ struct papr_scm_priv *p;
+ enum papr_pdsm pdsm;
+
+ /* Only dimm-specific calls are supported atm */
+ if (!nvdimm)
+ return -EINVAL;
+
+ /* get the provider data from struct nvdimm */
+ p = nvdimm_provider_data(nvdimm);
+
+ if (!test_bit(cmd, &cmd_mask)) {
+ dev_dbg(&p->pdev->dev, "Unsupported cmd=%u\n", cmd);
+ return -EINVAL;
+ }
+
+ /* For CMD_CALL verify pdsm request */
+ if (cmd == ND_CMD_CALL) {
+ /* Verify the envelope and envelop size */
+ if (!buf ||
+ buf_len < (sizeof(struct nd_cmd_pkg) + ND_PDSM_HDR_SIZE)) {
+ dev_dbg(&p->pdev->dev, "Invalid pkg size=%u\n",
+ buf_len);
+ return -EINVAL;
+ }
+
+ /* Verify that the nd_cmd_pkg.nd_family is correct */
+ nd_cmd = (struct nd_cmd_pkg *)buf;
+
+ if (nd_cmd->nd_family != NVDIMM_FAMILY_PAPR) {
+ dev_dbg(&p->pdev->dev, "Invalid pkg family=0x%llx\n",
+ nd_cmd->nd_family);
+ return -EINVAL;
+ }
+
+ pdsm = (enum papr_pdsm)nd_cmd->nd_command;
+
+ /* Verify if the pdsm command is valid */
+ if (pdsm <= PAPR_PDSM_MIN || pdsm >= PAPR_PDSM_MAX) {
+ dev_dbg(&p->pdev->dev, "PDSM[0x%x]: Invalid PDSM\n",
+ pdsm);
+ return -EINVAL;
+ }
+
+ /* Have enough space to hold returned 'nd_pkg_pdsm' header */
+ if (nd_cmd->nd_size_out < ND_PDSM_HDR_SIZE) {
+ dev_dbg(&p->pdev->dev, "PDSM[0x%x]: Invalid payload\n",
+ pdsm);
+ return -EINVAL;
+ }
+ }
+
+ /* Let the command be further processed */
+ return 0;
+}
+
+/* Fetch the DIMM health info and populate it in provided package. */
+static int papr_pdsm_health(struct papr_scm_priv *p,
+ union nd_pdsm_payload *payload)
+{
+ int rc;
+
+ /* Ensure dimm health mutex is taken preventing concurrent access */
+ rc = mutex_lock_interruptible(&p->health_mutex);
+ if (rc)
+ goto out;
+
+ /* Always fetch upto date dimm health data ignoring cached values */
+ rc = __drc_pmem_query_health(p);
+ if (rc) {
+ mutex_unlock(&p->health_mutex);
+ goto out;
+ }
+
+ /* update health struct with various flags derived from health bitmap */
+ payload->health = (struct nd_papr_pdsm_health) {
+ .extension_flags = 0,
+ .dimm_unarmed = !!(p->health_bitmap & PAPR_PMEM_UNARMED_MASK),
+ .dimm_bad_shutdown = !!(p->health_bitmap & PAPR_PMEM_BAD_SHUTDOWN_MASK),
+ .dimm_bad_restore = !!(p->health_bitmap & PAPR_PMEM_BAD_RESTORE_MASK),
+ .dimm_scrubbed = !!(p->health_bitmap & PAPR_PMEM_SCRUBBED_AND_LOCKED),
+ .dimm_locked = !!(p->health_bitmap & PAPR_PMEM_SCRUBBED_AND_LOCKED),
+ .dimm_encrypted = !!(p->health_bitmap & PAPR_PMEM_ENCRYPTED),
+ .dimm_health = PAPR_PDSM_DIMM_HEALTHY,
+ };
+
+ /* Update field dimm_health based on health_bitmap flags */
+ if (p->health_bitmap & PAPR_PMEM_HEALTH_FATAL)
+ payload->health.dimm_health = PAPR_PDSM_DIMM_FATAL;
+ else if (p->health_bitmap & PAPR_PMEM_HEALTH_CRITICAL)
+ payload->health.dimm_health = PAPR_PDSM_DIMM_CRITICAL;
+ else if (p->health_bitmap & PAPR_PMEM_HEALTH_UNHEALTHY)
+ payload->health.dimm_health = PAPR_PDSM_DIMM_UNHEALTHY;
+
+ /* struct populated hence can release the mutex now */
+ mutex_unlock(&p->health_mutex);
+ rc = sizeof(struct nd_papr_pdsm_health);
+
+out:
+ return rc;
+}
+
+/*
+ * 'struct pdsm_cmd_desc'
+ * Identifies supported PDSMs' expected length of in/out payloads
+ * and pdsm service function.
+ *
+ * size_in : Size of input payload if any in the PDSM request.
+ * size_out : Size of output payload if any in the PDSM request.
+ * service : Service function for the PDSM request. Return semantics:
+ * rc < 0 : Error servicing PDSM and rc indicates the error.
+ * rc >=0 : Serviced successfully and 'rc' indicate number of
+ * bytes written to payload.
+ */
+struct pdsm_cmd_desc {
+ u32 size_in;
+ u32 size_out;
+ int (*service)(struct papr_scm_priv *dimm,
+ union nd_pdsm_payload *payload);
+};
+
+/* Holds all supported PDSMs' command descriptors */
+static const struct pdsm_cmd_desc __pdsm_cmd_descriptors[] = {
+ [PAPR_PDSM_MIN] = {
+ .size_in = 0,
+ .size_out = 0,
+ .service = NULL,
+ },
+ /* New PDSM command descriptors to be added below */
+
+ [PAPR_PDSM_HEALTH] = {
+ .size_in = 0,
+ .size_out = sizeof(struct nd_papr_pdsm_health),
+ .service = papr_pdsm_health,
+ },
+ /* Empty */
+ [PAPR_PDSM_MAX] = {
+ .size_in = 0,
+ .size_out = 0,
+ .service = NULL,
+ },
+};
+
+/* Given a valid pdsm cmd return its command descriptor else return NULL */
+static inline const struct pdsm_cmd_desc *pdsm_cmd_desc(enum papr_pdsm cmd)
+{
+ if (cmd >= 0 || cmd < ARRAY_SIZE(__pdsm_cmd_descriptors))
+ return &__pdsm_cmd_descriptors[cmd];
+
+ return NULL;
+}
+
+/*
+ * For a given pdsm request call an appropriate service function.
+ * Returns errors if any while handling the pdsm command package.
+ */
+static int papr_scm_service_pdsm(struct papr_scm_priv *p,
+ struct nd_cmd_pkg *pkg)
+{
+ /* Get the PDSM header and PDSM command */
+ struct nd_pkg_pdsm *pdsm_pkg = (struct nd_pkg_pdsm *)pkg->nd_payload;
+ enum papr_pdsm pdsm = (enum papr_pdsm)pkg->nd_command;
+ const struct pdsm_cmd_desc *pdsc;
+ int rc;
+
+ /* Fetch corresponding pdsm descriptor for validation and servicing */
+ pdsc = pdsm_cmd_desc(pdsm);
+
+ /* Validate pdsm descriptor */
+ /* Ensure that reserved fields are 0 */
+ if (pdsm_pkg->reserved[0] || pdsm_pkg->reserved[1]) {
+ dev_dbg(&p->pdev->dev, "PDSM[0x%x]: Invalid reserved field\n",
+ pdsm);
+ return -EINVAL;
+ }
+
+ /* If pdsm expects some input, then ensure that the size_in matches */
+ if (pdsc->size_in &&
+ pkg->nd_size_in != (pdsc->size_in + ND_PDSM_HDR_SIZE)) {
+ dev_dbg(&p->pdev->dev, "PDSM[0x%x]: Mismatched size_in=%d\n",
+ pdsm, pkg->nd_size_in);
+ return -EINVAL;
+ }
+
+ /* If pdsm wants to return data, then ensure that size_out matches */
+ if (pdsc->size_out &&
+ pkg->nd_size_out != (pdsc->size_out + ND_PDSM_HDR_SIZE)) {
+ dev_dbg(&p->pdev->dev, "PDSM[0x%x]: Mismatched size_out=%d\n",
+ pdsm, pkg->nd_size_out);
+ return -EINVAL;
+ }
+
+ /* Service the pdsm */
+ if (pdsc->service) {
+ dev_dbg(&p->pdev->dev, "PDSM[0x%x]: Servicing..\n", pdsm);
+
+ rc = pdsc->service(p, &pdsm_pkg->payload);
+
+ if (rc < 0) {
+ /* error encountered while servicing pdsm */
+ pdsm_pkg->cmd_status = rc;
+ pkg->nd_fw_size = ND_PDSM_HDR_SIZE;
+ } else {
+ /* pdsm serviced and 'rc' bytes written to payload */
+ pdsm_pkg->cmd_status = 0;
+ pkg->nd_fw_size = ND_PDSM_HDR_SIZE + rc;
+ }
+ } else {
+ dev_dbg(&p->pdev->dev, "PDSM[0x%x]: Unsupported PDSM request\n",
+ pdsm);
+ pdsm_pkg->cmd_status = -ENOENT;
+ pkg->nd_fw_size = ND_PDSM_HDR_SIZE;
+ }
+
+ return pdsm_pkg->cmd_status;
+}
+
static int papr_scm_ndctl(struct nvdimm_bus_descriptor *nd_desc,
struct nvdimm *nvdimm, unsigned int cmd, void *buf,
unsigned int buf_len, int *cmd_rc)
{
struct nd_cmd_get_config_size *get_size_hdr;
+ struct nd_cmd_pkg *call_pkg = NULL;
struct papr_scm_priv *p;
+ int rc;
- /* Only dimm-specific calls are supported atm */
- if (!nvdimm)
- return -EINVAL;
+ rc = is_cmd_valid(nvdimm, cmd, buf, buf_len);
+ if (rc) {
+ pr_debug("Invalid cmd=0x%x. Err=%d\n", cmd, rc);
+ return rc;
+ }
+
+ /* Use a local variable in case cmd_rc pointer is NULL */
+ if (!cmd_rc)
+ cmd_rc = &rc;
p = nvdimm_provider_data(nvdimm);
@@ -277,7 +616,13 @@ static int papr_scm_ndctl(struct nvdimm_bus_descriptor *nd_desc,
*cmd_rc = papr_scm_meta_set(p, buf);
break;
+ case ND_CMD_CALL:
+ call_pkg = (struct nd_cmd_pkg *)buf;
+ *cmd_rc = papr_scm_service_pdsm(p, call_pkg);
+ break;
+
default:
+ dev_dbg(&p->pdev->dev, "Unknown command = %d\n", cmd);
return -EINVAL;
}
@@ -286,6 +631,64 @@ static int papr_scm_ndctl(struct nvdimm_bus_descriptor *nd_desc,
return 0;
}
+static ssize_t flags_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct nvdimm *dimm = to_nvdimm(dev);
+ struct papr_scm_priv *p = nvdimm_provider_data(dimm);
+ struct seq_buf s;
+ u64 health;
+ int rc;
+
+ rc = drc_pmem_query_health(p);
+ if (rc)
+ return rc;
+
+ /* Copy health_bitmap locally, check masks & update out buffer */
+ health = READ_ONCE(p->health_bitmap);
+
+ seq_buf_init(&s, buf, PAGE_SIZE);
+ if (health & PAPR_PMEM_UNARMED_MASK)
+ seq_buf_printf(&s, "not_armed ");
+
+ if (health & PAPR_PMEM_BAD_SHUTDOWN_MASK)
+ seq_buf_printf(&s, "flush_fail ");
+
+ if (health & PAPR_PMEM_BAD_RESTORE_MASK)
+ seq_buf_printf(&s, "restore_fail ");
+
+ if (health & PAPR_PMEM_ENCRYPTED)
+ seq_buf_printf(&s, "encrypted ");
+
+ if (health & PAPR_PMEM_SMART_EVENT_MASK)
+ seq_buf_printf(&s, "smart_notify ");
+
+ if (health & PAPR_PMEM_SCRUBBED_AND_LOCKED)
+ seq_buf_printf(&s, "scrubbed locked ");
+
+ if (seq_buf_used(&s))
+ seq_buf_printf(&s, "\n");
+
+ return seq_buf_used(&s);
+}
+DEVICE_ATTR_RO(flags);
+
+/* papr_scm specific dimm attributes */
+static struct attribute *papr_nd_attributes[] = {
+ &dev_attr_flags.attr,
+ NULL,
+};
+
+static struct attribute_group papr_nd_attribute_group = {
+ .name = "papr",
+ .attrs = papr_nd_attributes,
+};
+
+static const struct attribute_group *papr_nd_attr_groups[] = {
+ &papr_nd_attribute_group,
+ NULL,
+};
+
static int papr_scm_nvdimm_init(struct papr_scm_priv *p)
{
struct device *dev = &p->pdev->dev;
@@ -312,8 +715,8 @@ static int papr_scm_nvdimm_init(struct papr_scm_priv *p)
dimm_flags = 0;
set_bit(NDD_LABELING, &dimm_flags);
- p->nvdimm = nvdimm_create(p->bus, p, NULL, dimm_flags,
- PAPR_SCM_DIMM_CMD_MASK, 0, NULL);
+ p->nvdimm = nvdimm_create(p->bus, p, papr_nd_attr_groups,
+ dimm_flags, PAPR_SCM_DIMM_CMD_MASK, 0, NULL);
if (!p->nvdimm) {
dev_err(dev, "Error creating DIMM object for %pOF\n", p->dn);
goto err;
@@ -399,6 +802,9 @@ static int papr_scm_probe(struct platform_device *pdev)
if (!p)
return -ENOMEM;
+ /* Initialize the dimm mutex */
+ mutex_init(&p->health_mutex);
+
/* optional DT properties */
of_property_read_u32(dn, "ibm,metadata-size", &metadata_size);
diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index 4a8874bc1057..040b9d01c079 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -1066,10 +1066,10 @@ int fsl_pci_mcheck_exception(struct pt_regs *regs)
if (is_in_pci_mem_space(addr)) {
if (user_mode(regs))
- ret = probe_user_read(&inst, (void __user *)regs->nip,
- sizeof(inst));
+ ret = copy_from_user_nofault(&inst,
+ (void __user *)regs->nip, sizeof(inst));
else
- ret = probe_kernel_address((void *)regs->nip, inst);
+ ret = get_kernel_nofault(inst, (void *)regs->nip);
if (!ret && mcheck_handle_load(regs, inst)) {
regs->nip += 4;
diff --git a/arch/riscv/include/asm/cmpxchg.h b/arch/riscv/include/asm/cmpxchg.h
index d969bab4a26b..262e5bbb2776 100644
--- a/arch/riscv/include/asm/cmpxchg.h
+++ b/arch/riscv/include/asm/cmpxchg.h
@@ -179,7 +179,7 @@
" bnez %1, 0b\n" \
"1:\n" \
: "=&r" (__ret), "=&r" (__rc), "+A" (*__ptr) \
- : "rJ" (__old), "rJ" (__new) \
+ : "rJ" ((long)__old), "rJ" (__new) \
: "memory"); \
break; \
case 8: \
@@ -224,7 +224,7 @@
RISCV_ACQUIRE_BARRIER \
"1:\n" \
: "=&r" (__ret), "=&r" (__rc), "+A" (*__ptr) \
- : "rJ" (__old), "rJ" (__new) \
+ : "rJ" ((long)__old), "rJ" (__new) \
: "memory"); \
break; \
case 8: \
@@ -270,7 +270,7 @@
" bnez %1, 0b\n" \
"1:\n" \
: "=&r" (__ret), "=&r" (__rc), "+A" (*__ptr) \
- : "rJ" (__old), "rJ" (__new) \
+ : "rJ" ((long)__old), "rJ" (__new) \
: "memory"); \
break; \
case 8: \
@@ -316,7 +316,7 @@
" fence rw, rw\n" \
"1:\n" \
: "=&r" (__ret), "=&r" (__rc), "+A" (*__ptr) \
- : "rJ" (__old), "rJ" (__new) \
+ : "rJ" ((long)__old), "rJ" (__new) \
: "memory"); \
break; \
case 8: \
diff --git a/arch/riscv/kernel/ftrace.c b/arch/riscv/kernel/ftrace.c
index 08396614d6f4..2ff63d0cbb50 100644
--- a/arch/riscv/kernel/ftrace.c
+++ b/arch/riscv/kernel/ftrace.c
@@ -38,7 +38,8 @@ static int ftrace_check_current_call(unsigned long hook_pos,
* Read the text we want to modify;
* return must be -EFAULT on read error
*/
- if (probe_kernel_read(replaced, (void *)hook_pos, MCOUNT_INSN_SIZE))
+ if (copy_from_kernel_nofault(replaced, (void *)hook_pos,
+ MCOUNT_INSN_SIZE))
return -EFAULT;
/*
diff --git a/arch/riscv/kernel/kgdb.c b/arch/riscv/kernel/kgdb.c
index f16ade84a11f..c3275f42d1ac 100644
--- a/arch/riscv/kernel/kgdb.c
+++ b/arch/riscv/kernel/kgdb.c
@@ -62,7 +62,7 @@ int get_step_address(struct pt_regs *regs, unsigned long *next_addr)
unsigned int rs1_num, rs2_num;
int op_code;
- if (probe_kernel_address((void *)pc, op_code))
+ if (get_kernel_nofault(op_code, (void *)pc))
return -EINVAL;
if ((op_code & __INSN_LENGTH_MASK) != __INSN_LENGTH_GE_32) {
if (is_c_jalr_insn(op_code) || is_c_jr_insn(op_code)) {
@@ -146,14 +146,14 @@ int do_single_step(struct pt_regs *regs)
return error;
/* Store the op code in the stepped address */
- error = probe_kernel_address((void *)addr, stepped_opcode);
+ error = get_kernel_nofault(stepped_opcode, (void *)addr);
if (error)
return error;
stepped_address = addr;
/* Replace the op code with the break instruction */
- error = probe_kernel_write((void *)stepped_address,
+ error = copy_to_kernel_nofault((void *)stepped_address,
arch_kgdb_ops.gdb_bpt_instr,
BREAK_INSTR_SIZE);
/* Flush and return */
@@ -173,7 +173,7 @@ int do_single_step(struct pt_regs *regs)
static void undo_single_step(struct pt_regs *regs)
{
if (stepped_opcode != 0) {
- probe_kernel_write((void *)stepped_address,
+ copy_to_kernel_nofault((void *)stepped_address,
(void *)&stepped_opcode, BREAK_INSTR_SIZE);
flush_icache_range(stepped_address,
stepped_address + BREAK_INSTR_SIZE);
diff --git a/arch/riscv/kernel/patch.c b/arch/riscv/kernel/patch.c
index d4a64dfed342..3fe7a5296aa5 100644
--- a/arch/riscv/kernel/patch.c
+++ b/arch/riscv/kernel/patch.c
@@ -63,7 +63,7 @@ static int patch_insn_write(void *addr, const void *insn, size_t len)
waddr = patch_map(addr, FIX_TEXT_POKE0);
- ret = probe_kernel_write(waddr, insn, len);
+ ret = copy_to_kernel_nofault(waddr, insn, len);
patch_unmap(FIX_TEXT_POKE0);
@@ -76,7 +76,7 @@ NOKPROBE_SYMBOL(patch_insn_write);
#else
static int patch_insn_write(void *addr, const void *insn, size_t len)
{
- return probe_kernel_write(addr, insn, len);
+ return copy_to_kernel_nofault(addr, insn, len);
}
NOKPROBE_SYMBOL(patch_insn_write);
#endif /* CONFIG_MMU */
diff --git a/arch/riscv/kernel/sys_riscv.c b/arch/riscv/kernel/sys_riscv.c
index f3619f59d85c..12f8a7fce78b 100644
--- a/arch/riscv/kernel/sys_riscv.c
+++ b/arch/riscv/kernel/sys_riscv.c
@@ -8,6 +8,7 @@
#include <linux/syscalls.h>
#include <asm/unistd.h>
#include <asm/cacheflush.h>
+#include <asm-generic/mman-common.h>
static long riscv_sys_mmap(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
@@ -16,6 +17,11 @@ static long riscv_sys_mmap(unsigned long addr, unsigned long len,
{
if (unlikely(offset & (~PAGE_MASK >> page_shift_offset)))
return -EINVAL;
+
+ if ((prot & PROT_WRITE) && (prot & PROT_EXEC))
+ if (unlikely(!(prot & PROT_READ)))
+ return -EINVAL;
+
return ksys_mmap_pgoff(addr, len, prot, flags, fd,
offset >> (PAGE_SHIFT - page_shift_offset));
}
diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c
index ecec1778e3a4..7d95cce5e47c 100644
--- a/arch/riscv/kernel/traps.c
+++ b/arch/riscv/kernel/traps.c
@@ -137,7 +137,7 @@ static inline unsigned long get_break_insn_length(unsigned long pc)
{
bug_insn_t insn;
- if (probe_kernel_address((bug_insn_t *)pc, insn))
+ if (get_kernel_nofault(insn, (bug_insn_t *)pc))
return 0;
return GET_INSN_LENGTH(insn);
@@ -165,7 +165,7 @@ int is_valid_bugaddr(unsigned long pc)
if (pc < VMALLOC_START)
return 0;
- if (probe_kernel_address((bug_insn_t *)pc, insn))
+ if (get_kernel_nofault(insn, (bug_insn_t *)pc))
return 0;
if ((insn & __INSN_LENGTH_MASK) == __INSN_LENGTH_32)
return (insn == __BUG_INSN_32);
diff --git a/arch/riscv/mm/pageattr.c b/arch/riscv/mm/pageattr.c
index ec2c70f84994..289a9a5ea5b5 100644
--- a/arch/riscv/mm/pageattr.c
+++ b/arch/riscv/mm/pageattr.c
@@ -151,6 +151,7 @@ int set_memory_nx(unsigned long addr, int numpages)
int set_direct_map_invalid_noflush(struct page *page)
{
+ int ret;
unsigned long start = (unsigned long)page_address(page);
unsigned long end = start + PAGE_SIZE;
struct pageattr_masks masks = {
@@ -158,11 +159,16 @@ int set_direct_map_invalid_noflush(struct page *page)
.clear_mask = __pgprot(_PAGE_PRESENT)
};
- return walk_page_range(&init_mm, start, end, &pageattr_ops, &masks);
+ mmap_read_lock(&init_mm);
+ ret = walk_page_range(&init_mm, start, end, &pageattr_ops, &masks);
+ mmap_read_unlock(&init_mm);
+
+ return ret;
}
int set_direct_map_default_noflush(struct page *page)
{
+ int ret;
unsigned long start = (unsigned long)page_address(page);
unsigned long end = start + PAGE_SIZE;
struct pageattr_masks masks = {
@@ -170,7 +176,11 @@ int set_direct_map_default_noflush(struct page *page)
.clear_mask = __pgprot(0)
};
- return walk_page_range(&init_mm, start, end, &pageattr_ops, &masks);
+ mmap_read_lock(&init_mm);
+ ret = walk_page_range(&init_mm, start, end, &pageattr_ops, &masks);
+ mmap_read_unlock(&init_mm);
+
+ return ret;
}
void __kernel_map_pages(struct page *page, int numpages, int enable)
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 194824932a60..c7d7ede6300c 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -462,6 +462,7 @@ config NUMA
config NODES_SHIFT
int
+ depends on NEED_MULTIPLE_NODES
default "1"
config SCHED_SMT
diff --git a/arch/s390/crypto/prng.c b/arch/s390/crypto/prng.c
index d977643fa627..e1ae23911ccd 100644
--- a/arch/s390/crypto/prng.c
+++ b/arch/s390/crypto/prng.c
@@ -693,7 +693,7 @@ static ssize_t prng_chunksize_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- return snprintf(buf, PAGE_SIZE, "%u\n", prng_chunk_size);
+ return scnprintf(buf, PAGE_SIZE, "%u\n", prng_chunk_size);
}
static DEVICE_ATTR(chunksize, 0444, prng_chunksize_show, NULL);
@@ -712,7 +712,7 @@ static ssize_t prng_counter_show(struct device *dev,
counter = prng_data->prngws.byte_counter;
mutex_unlock(&prng_data->mutex);
- return snprintf(buf, PAGE_SIZE, "%llu\n", counter);
+ return scnprintf(buf, PAGE_SIZE, "%llu\n", counter);
}
static DEVICE_ATTR(byte_counter, 0444, prng_counter_show, NULL);
@@ -721,7 +721,7 @@ static ssize_t prng_errorflag_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- return snprintf(buf, PAGE_SIZE, "%d\n", prng_errorflag);
+ return scnprintf(buf, PAGE_SIZE, "%d\n", prng_errorflag);
}
static DEVICE_ATTR(errorflag, 0444, prng_errorflag_show, NULL);
@@ -731,9 +731,9 @@ static ssize_t prng_mode_show(struct device *dev,
char *buf)
{
if (prng_mode == PRNG_MODE_TDES)
- return snprintf(buf, PAGE_SIZE, "TDES\n");
+ return scnprintf(buf, PAGE_SIZE, "TDES\n");
else
- return snprintf(buf, PAGE_SIZE, "SHA512\n");
+ return scnprintf(buf, PAGE_SIZE, "SHA512\n");
}
static DEVICE_ATTR(mode, 0444, prng_mode_show, NULL);
@@ -756,7 +756,7 @@ static ssize_t prng_reseed_limit_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- return snprintf(buf, PAGE_SIZE, "%u\n", prng_reseed_limit);
+ return scnprintf(buf, PAGE_SIZE, "%u\n", prng_reseed_limit);
}
static ssize_t prng_reseed_limit_store(struct device *dev,
struct device_attribute *attr,
@@ -787,7 +787,7 @@ static ssize_t prng_strength_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- return snprintf(buf, PAGE_SIZE, "256\n");
+ return scnprintf(buf, PAGE_SIZE, "256\n");
}
static DEVICE_ATTR(strength, 0444, prng_strength_show, NULL);
diff --git a/arch/s390/include/asm/syscall.h b/arch/s390/include/asm/syscall.h
index f073292e9fdb..d9d5de0f67ff 100644
--- a/arch/s390/include/asm/syscall.h
+++ b/arch/s390/include/asm/syscall.h
@@ -33,7 +33,17 @@ static inline void syscall_rollback(struct task_struct *task,
static inline long syscall_get_error(struct task_struct *task,
struct pt_regs *regs)
{
- return IS_ERR_VALUE(regs->gprs[2]) ? regs->gprs[2] : 0;
+ unsigned long error = regs->gprs[2];
+#ifdef CONFIG_COMPAT
+ if (test_tsk_thread_flag(task, TIF_31BIT)) {
+ /*
+ * Sign-extend the value so (int)-EFOO becomes (long)-EFOO
+ * and will match correctly in comparisons.
+ */
+ error = (long)(int)error;
+ }
+#endif
+ return IS_ERR_VALUE(error) ? error : 0;
}
static inline long syscall_get_return_value(struct task_struct *task,
diff --git a/arch/s390/include/asm/vdso.h b/arch/s390/include/asm/vdso.h
index 3bcfdeb01395..0cd085cdeb4f 100644
--- a/arch/s390/include/asm/vdso.h
+++ b/arch/s390/include/asm/vdso.h
@@ -36,6 +36,7 @@ struct vdso_data {
__u32 tk_shift; /* Shift used for xtime_nsec 0x60 */
__u32 ts_dir; /* TOD steering direction 0x64 */
__u64 ts_end; /* TOD steering end 0x68 */
+ __u32 hrtimer_res; /* hrtimer resolution 0x70 */
};
struct vdso_per_cpu_data {
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index 165031bd3370..5d8cc1864566 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -76,6 +76,7 @@ int main(void)
OFFSET(__VDSO_TK_SHIFT, vdso_data, tk_shift);
OFFSET(__VDSO_TS_DIR, vdso_data, ts_dir);
OFFSET(__VDSO_TS_END, vdso_data, ts_end);
+ OFFSET(__VDSO_CLOCK_REALTIME_RES, vdso_data, hrtimer_res);
OFFSET(__VDSO_ECTG_BASE, vdso_per_cpu_data, ectg_timer_base);
OFFSET(__VDSO_ECTG_USER, vdso_per_cpu_data, ectg_user_time);
OFFSET(__VDSO_GETCPU_VAL, vdso_per_cpu_data, getcpu_val);
@@ -86,7 +87,6 @@ int main(void)
DEFINE(__CLOCK_REALTIME_COARSE, CLOCK_REALTIME_COARSE);
DEFINE(__CLOCK_MONOTONIC_COARSE, CLOCK_MONOTONIC_COARSE);
DEFINE(__CLOCK_THREAD_CPUTIME_ID, CLOCK_THREAD_CPUTIME_ID);
- DEFINE(__CLOCK_REALTIME_RES, MONOTONIC_RES_NSEC);
DEFINE(__CLOCK_COARSE_RES, LOW_RES_NSEC);
BLANK();
/* idle data offsets */
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 50ff6dd0f995..496f74d98473 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -401,9 +401,9 @@ ENTRY(system_call)
jnz .Lsysc_nr_ok
# svc 0: system call number in %r1
llgfr %r1,%r1 # clear high word in r1
+ sth %r1,__PT_INT_CODE+2(%r11)
cghi %r1,NR_syscalls
jnl .Lsysc_nr_ok
- sth %r1,__PT_INT_CODE+2(%r11)
slag %r8,%r1,3
.Lsysc_nr_ok:
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
index 44e01dd1e624..b388e87a08bf 100644
--- a/arch/s390/kernel/ftrace.c
+++ b/arch/s390/kernel/ftrace.c
@@ -83,7 +83,7 @@ int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec,
{
struct ftrace_insn orig, new, old;
- if (probe_kernel_read(&old, (void *) rec->ip, sizeof(old)))
+ if (copy_from_kernel_nofault(&old, (void *) rec->ip, sizeof(old)))
return -EFAULT;
if (addr == MCOUNT_ADDR) {
/* Initial code replacement */
@@ -105,7 +105,7 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
{
struct ftrace_insn orig, new, old;
- if (probe_kernel_read(&old, (void *) rec->ip, sizeof(old)))
+ if (copy_from_kernel_nofault(&old, (void *) rec->ip, sizeof(old)))
return -EFAULT;
/* Replace nop with an ftrace call. */
ftrace_generate_nop_insn(&orig);
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index ccea9a245867..90a2a17239b0 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -181,7 +181,7 @@ static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
struct kobj_attribute *attr, \
char *page) \
{ \
- return snprintf(page, PAGE_SIZE, _format, ##args); \
+ return scnprintf(page, PAGE_SIZE, _format, ##args); \
}
#define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index ce60a459a143..3cc15c066298 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -323,6 +323,25 @@ static inline void __poke_user_per(struct task_struct *child,
child->thread.per_user.end = data;
}
+static void fixup_int_code(struct task_struct *child, addr_t data)
+{
+ struct pt_regs *regs = task_pt_regs(child);
+ int ilc = regs->int_code >> 16;
+ u16 insn;
+
+ if (ilc > 6)
+ return;
+
+ if (ptrace_access_vm(child, regs->psw.addr - (regs->int_code >> 16),
+ &insn, sizeof(insn), FOLL_FORCE) != sizeof(insn))
+ return;
+
+ /* double check that tracee stopped on svc instruction */
+ if ((insn >> 8) != 0xa)
+ return;
+
+ regs->int_code = 0x20000 | (data & 0xffff);
+}
/*
* Write a word to the user area of a process at location addr. This
* operation does have an additional problem compared to peek_user.
@@ -334,7 +353,9 @@ static int __poke_user(struct task_struct *child, addr_t addr, addr_t data)
struct user *dummy = NULL;
addr_t offset;
+
if (addr < (addr_t) &dummy->regs.acrs) {
+ struct pt_regs *regs = task_pt_regs(child);
/*
* psw and gprs are stored on the stack
*/
@@ -352,7 +373,11 @@ static int __poke_user(struct task_struct *child, addr_t addr, addr_t data)
/* Invalid addressing mode bits */
return -EINVAL;
}
- *(addr_t *)((addr_t) &task_pt_regs(child)->psw + addr) = data;
+
+ if (test_pt_regs_flag(regs, PIF_SYSCALL) &&
+ addr == offsetof(struct user, regs.gprs[2]))
+ fixup_int_code(child, data);
+ *(addr_t *)((addr_t) &regs->psw + addr) = data;
} else if (addr < (addr_t) (&dummy->regs.orig_gpr2)) {
/*
@@ -718,6 +743,10 @@ static int __poke_user_compat(struct task_struct *child,
regs->psw.mask = (regs->psw.mask & ~PSW_MASK_BA) |
(__u64)(tmp & PSW32_ADDR_AMODE);
} else {
+
+ if (test_pt_regs_flag(regs, PIF_SYSCALL) &&
+ addr == offsetof(struct compat_user, regs.gprs[2]))
+ fixup_int_code(child, data);
/* gpr 0-15 */
*(__u32*)((addr_t) &regs->psw + addr*2 + 4) = tmp;
}
@@ -837,40 +866,66 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
{
unsigned long mask = -1UL;
+ long ret = -1;
+
+ if (is_compat_task())
+ mask = 0xffffffff;
/*
* The sysc_tracesys code in entry.S stored the system
* call number to gprs[2].
*/
if (test_thread_flag(TIF_SYSCALL_TRACE) &&
- (tracehook_report_syscall_entry(regs) ||
- regs->gprs[2] >= NR_syscalls)) {
+ tracehook_report_syscall_entry(regs)) {
/*
- * Tracing decided this syscall should not happen or the
- * debugger stored an invalid system call number. Skip
+ * Tracing decided this syscall should not happen. Skip
* the system call and the system call restart handling.
*/
- clear_pt_regs_flag(regs, PIF_SYSCALL);
- return -1;
+ goto skip;
}
+#ifdef CONFIG_SECCOMP
/* Do the secure computing check after ptrace. */
- if (secure_computing()) {
- /* seccomp failures shouldn't expose any additional code. */
- return -1;
+ if (unlikely(test_thread_flag(TIF_SECCOMP))) {
+ struct seccomp_data sd;
+
+ if (is_compat_task()) {
+ sd.instruction_pointer = regs->psw.addr & 0x7fffffff;
+ sd.arch = AUDIT_ARCH_S390;
+ } else {
+ sd.instruction_pointer = regs->psw.addr;
+ sd.arch = AUDIT_ARCH_S390X;
+ }
+
+ sd.nr = regs->int_code & 0xffff;
+ sd.args[0] = regs->orig_gpr2 & mask;
+ sd.args[1] = regs->gprs[3] & mask;
+ sd.args[2] = regs->gprs[4] & mask;
+ sd.args[3] = regs->gprs[5] & mask;
+ sd.args[4] = regs->gprs[6] & mask;
+ sd.args[5] = regs->gprs[7] & mask;
+
+ if (__secure_computing(&sd) == -1)
+ goto skip;
}
+#endif /* CONFIG_SECCOMP */
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
- trace_sys_enter(regs, regs->gprs[2]);
+ trace_sys_enter(regs, regs->int_code & 0xffff);
- if (is_compat_task())
- mask = 0xffffffff;
- audit_syscall_entry(regs->gprs[2], regs->orig_gpr2 & mask,
+ audit_syscall_entry(regs->int_code & 0xffff, regs->orig_gpr2 & mask,
regs->gprs[3] &mask, regs->gprs[4] &mask,
regs->gprs[5] &mask);
+ if ((signed long)regs->gprs[2] >= NR_syscalls) {
+ regs->gprs[2] = -ENOSYS;
+ ret = -ENOSYS;
+ }
return regs->gprs[2];
+skip:
+ clear_pt_regs_flag(regs, PIF_SYSCALL);
+ return ret;
}
asmlinkage void do_syscall_trace_exit(struct pt_regs *regs)
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index f9d070d016e3..b1113b519432 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -301,6 +301,7 @@ void update_vsyscall(struct timekeeper *tk)
vdso_data->tk_mult = tk->tkr_mono.mult;
vdso_data->tk_shift = tk->tkr_mono.shift;
+ vdso_data->hrtimer_res = hrtimer_resolution;
smp_wmb();
++vdso_data->tb_update_count;
}
diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c
index 66e89b2866d7..c296e5c8dbf9 100644
--- a/arch/s390/kernel/uv.c
+++ b/arch/s390/kernel/uv.c
@@ -331,7 +331,7 @@ EXPORT_SYMBOL_GPL(arch_make_page_accessible);
static ssize_t uv_query_facilities(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
- return snprintf(page, PAGE_SIZE, "%lx\n%lx\n%lx\n%lx\n",
+ return scnprintf(page, PAGE_SIZE, "%lx\n%lx\n%lx\n%lx\n",
uv_info.inst_calls_list[0],
uv_info.inst_calls_list[1],
uv_info.inst_calls_list[2],
@@ -344,7 +344,7 @@ static struct kobj_attribute uv_query_facilities_attr =
static ssize_t uv_query_max_guest_cpus(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
- return snprintf(page, PAGE_SIZE, "%d\n",
+ return scnprintf(page, PAGE_SIZE, "%d\n",
uv_info.max_guest_cpus);
}
@@ -354,7 +354,7 @@ static struct kobj_attribute uv_query_max_guest_cpus_attr =
static ssize_t uv_query_max_guest_vms(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
- return snprintf(page, PAGE_SIZE, "%d\n",
+ return scnprintf(page, PAGE_SIZE, "%d\n",
uv_info.max_num_sec_conf);
}
@@ -364,7 +364,7 @@ static struct kobj_attribute uv_query_max_guest_vms_attr =
static ssize_t uv_query_max_guest_addr(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
- return snprintf(page, PAGE_SIZE, "%lx\n",
+ return scnprintf(page, PAGE_SIZE, "%lx\n",
uv_info.max_sec_stor_addr);
}
diff --git a/arch/s390/kernel/vdso64/Makefile b/arch/s390/kernel/vdso64/Makefile
index bec19e7e6e1c..4a66a1cb919b 100644
--- a/arch/s390/kernel/vdso64/Makefile
+++ b/arch/s390/kernel/vdso64/Makefile
@@ -18,8 +18,8 @@ KBUILD_AFLAGS_64 += -m64 -s
KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS))
KBUILD_CFLAGS_64 += -m64 -fPIC -shared -fno-common -fno-builtin
-KBUILD_CFLAGS_64 += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
- -Wl,--hash-style=both
+ldflags-y := -fPIC -shared -nostdlib -soname=linux-vdso64.so.1 \
+ --hash-style=both --build-id -T
$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_64)
$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_64)
@@ -37,8 +37,8 @@ KASAN_SANITIZE := n
$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
# link rule for the .so file, .lds has to be first
-$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) FORCE
- $(call if_changed,vdso64ld)
+$(obj)/vdso64.so.dbg: $(obj)/vdso64.lds $(obj-vdso64) FORCE
+ $(call if_changed,ld)
# strip rule for the .so file
$(obj)/%.so: OBJCOPYFLAGS := -S
@@ -50,8 +50,6 @@ $(obj-vdso64): %.o: %.S FORCE
$(call if_changed_dep,vdso64as)
# actual build commands
-quiet_cmd_vdso64ld = VDSO64L $@
- cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $(filter %.lds %.o,$^) -o $@
quiet_cmd_vdso64as = VDSO64A $@
cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
diff --git a/arch/s390/kernel/vdso64/clock_getres.S b/arch/s390/kernel/vdso64/clock_getres.S
index 081435398e0a..0c79caa32b59 100644
--- a/arch/s390/kernel/vdso64/clock_getres.S
+++ b/arch/s390/kernel/vdso64/clock_getres.S
@@ -17,12 +17,14 @@
.type __kernel_clock_getres,@function
__kernel_clock_getres:
CFI_STARTPROC
- larl %r1,4f
+ larl %r1,3f
+ lg %r0,0(%r1)
cghi %r2,__CLOCK_REALTIME_COARSE
je 0f
cghi %r2,__CLOCK_MONOTONIC_COARSE
je 0f
- larl %r1,3f
+ larl %r1,_vdso_data
+ llgf %r0,__VDSO_CLOCK_REALTIME_RES(%r1)
cghi %r2,__CLOCK_REALTIME
je 0f
cghi %r2,__CLOCK_MONOTONIC
@@ -36,7 +38,6 @@ __kernel_clock_getres:
jz 2f
0: ltgr %r3,%r3
jz 1f /* res == NULL */
- lg %r0,0(%r1)
xc 0(8,%r3),0(%r3) /* set tp->tv_sec to zero */
stg %r0,8(%r3) /* store tp->tv_usec */
1: lghi %r2,0
@@ -45,6 +46,5 @@ __kernel_clock_getres:
svc 0
br %r14
CFI_ENDPROC
-3: .quad __CLOCK_REALTIME_RES
-4: .quad __CLOCK_COARSE_RES
+3: .quad __CLOCK_COARSE_RES
.size __kernel_clock_getres,.-__kernel_clock_getres
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 6a24751557f0..d53c2e2ea1fd 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -105,7 +105,7 @@ static int bad_address(void *p)
{
unsigned long dummy;
- return probe_kernel_address((unsigned long *)p, dummy);
+ return get_kernel_nofault(dummy, (unsigned long *)p);
}
static void dump_pagetable(unsigned long asce, unsigned long address)
diff --git a/arch/sh/kernel/ftrace.c b/arch/sh/kernel/ftrace.c
index 1b04270e5460..0646c5961846 100644
--- a/arch/sh/kernel/ftrace.c
+++ b/arch/sh/kernel/ftrace.c
@@ -119,7 +119,7 @@ static void ftrace_mod_code(void)
* But if one were to fail, then they all should, and if one were
* to succeed, then they all should.
*/
- mod_code_status = probe_kernel_write(mod_code_ip, mod_code_newcode,
+ mod_code_status = copy_to_kernel_nofault(mod_code_ip, mod_code_newcode,
MCOUNT_INSN_SIZE);
/* if we fail, then kill any new writers */
@@ -203,7 +203,7 @@ static int ftrace_modify_code(unsigned long ip, unsigned char *old_code,
*/
/* read the text we want to modify */
- if (probe_kernel_read(replaced, (void *)ip, MCOUNT_INSN_SIZE))
+ if (copy_from_kernel_nofault(replaced, (void *)ip, MCOUNT_INSN_SIZE))
return -EFAULT;
/* Make sure it is what we expect it to be */
@@ -268,7 +268,7 @@ static int ftrace_mod(unsigned long ip, unsigned long old_addr,
{
unsigned char code[MCOUNT_INSN_SIZE];
- if (probe_kernel_read(code, (void *)ip, MCOUNT_INSN_SIZE))
+ if (copy_from_kernel_nofault(code, (void *)ip, MCOUNT_INSN_SIZE))
return -EFAULT;
if (old_addr != __raw_readl((unsigned long *)code))
diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c
index a33025451fcd..9c3d32b80038 100644
--- a/arch/sh/kernel/traps.c
+++ b/arch/sh/kernel/traps.c
@@ -118,7 +118,7 @@ int is_valid_bugaddr(unsigned long addr)
if (addr < PAGE_OFFSET)
return 0;
- if (probe_kernel_address((insn_size_t *)addr, opcode))
+ if (get_kernel_nofault(opcode, (insn_size_t *)addr))
return 0;
if (opcode == TRAPA_BUG_OPCODE)
return 1;
diff --git a/arch/um/kernel/maccess.c b/arch/um/kernel/maccess.c
index e929c0966696..8ccd56813f68 100644
--- a/arch/um/kernel/maccess.c
+++ b/arch/um/kernel/maccess.c
@@ -7,7 +7,7 @@
#include <linux/kernel.h>
#include <os.h>
-bool probe_kernel_read_allowed(const void *src, size_t size)
+bool copy_from_kernel_nofault_allowed(const void *src, size_t size)
{
void *psrc = (void *)rounddown((unsigned long)src, PAGE_SIZE);
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index f8998e97457f..be5363b21540 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -943,7 +943,7 @@ struct kvm_arch {
atomic_t vapics_in_nmi_mode;
struct mutex apic_map_lock;
struct kvm_apic_map *apic_map;
- bool apic_map_dirty;
+ atomic_t apic_map_dirty;
bool apic_access_page_done;
unsigned long apicv_inhibit_reasons;
@@ -1220,7 +1220,7 @@ struct kvm_x86_ops {
void (*enable_log_dirty_pt_masked)(struct kvm *kvm,
struct kvm_memory_slot *slot,
gfn_t offset, unsigned long mask);
- int (*write_log_dirty)(struct kvm_vcpu *vcpu);
+ int (*write_log_dirty)(struct kvm_vcpu *vcpu, gpa_t l2_gpa);
/* pmu operations of sub-arch */
const struct kvm_pmu_ops *pmu_ops;
diff --git a/arch/x86/include/asm/mwait.h b/arch/x86/include/asm/mwait.h
index 73d997aa2966..e039a933aca3 100644
--- a/arch/x86/include/asm/mwait.h
+++ b/arch/x86/include/asm/mwait.h
@@ -25,8 +25,6 @@
#define TPAUSE_C01_STATE 1
#define TPAUSE_C02_STATE 0
-u32 get_umwait_control_msr(void);
-
static inline void __monitor(const void *eax, unsigned long ecx,
unsigned long edx)
{
diff --git a/arch/x86/include/asm/ptrace.h b/arch/x86/include/asm/ptrace.h
index ebedeab48704..255b2dde2c1b 100644
--- a/arch/x86/include/asm/ptrace.h
+++ b/arch/x86/include/asm/ptrace.h
@@ -278,7 +278,7 @@ static inline unsigned long *regs_get_kernel_stack_nth_addr(struct pt_regs *regs
}
/* To avoid include hell, we can't include uaccess.h */
-extern long probe_kernel_read(void *dst, const void *src, size_t size);
+extern long copy_from_kernel_nofault(void *dst, const void *src, size_t size);
/**
* regs_get_kernel_stack_nth() - get Nth entry of the stack
@@ -298,7 +298,7 @@ static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
addr = regs_get_kernel_stack_nth_addr(regs, n);
if (addr) {
- ret = probe_kernel_read(&val, addr, sizeof(val));
+ ret = copy_from_kernel_nofault(&val, addr, sizeof(val));
if (!ret)
return val;
}
diff --git a/arch/x86/kernel/cpu/umwait.c b/arch/x86/kernel/cpu/umwait.c
index 300e3fd5ade3..ec8064c0ae03 100644
--- a/arch/x86/kernel/cpu/umwait.c
+++ b/arch/x86/kernel/cpu/umwait.c
@@ -18,12 +18,6 @@
*/
static u32 umwait_control_cached = UMWAIT_CTRL_VAL(100000, UMWAIT_C02_ENABLE);
-u32 get_umwait_control_msr(void)
-{
- return umwait_control_cached;
-}
-EXPORT_SYMBOL_GPL(get_umwait_control_msr);
-
/*
* Cache the original IA32_UMWAIT_CONTROL MSR value which is configured by
* hardware or BIOS before kernel boot.
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 456511b2284e..b037cfa7c0c5 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -106,7 +106,7 @@ void show_opcodes(struct pt_regs *regs, const char *loglvl)
bad_ip = user_mode(regs) &&
__chk_range_not_ok(prologue, OPCODE_BUFSIZE, TASK_SIZE_MAX);
- if (bad_ip || probe_kernel_read(opcodes, (u8 *)prologue,
+ if (bad_ip || copy_from_kernel_nofault(opcodes, (u8 *)prologue,
OPCODE_BUFSIZE)) {
printk("%sCode: Bad RIP value.\n", loglvl);
} else {
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index c84d28e90a58..51504566b3a6 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -86,7 +86,7 @@ static int ftrace_verify_code(unsigned long ip, const char *old_code)
* sure what we read is what we expected it to be before modifying it.
*/
/* read the text we want to modify */
- if (probe_kernel_read(cur_code, (void *)ip, MCOUNT_INSN_SIZE)) {
+ if (copy_from_kernel_nofault(cur_code, (void *)ip, MCOUNT_INSN_SIZE)) {
WARN_ON(1);
return -EFAULT;
}
@@ -355,7 +355,7 @@ create_trampoline(struct ftrace_ops *ops, unsigned int *tramp_size)
npages = DIV_ROUND_UP(*tramp_size, PAGE_SIZE);
/* Copy ftrace_caller onto the trampoline memory */
- ret = probe_kernel_read(trampoline, (void *)start_offset, size);
+ ret = copy_from_kernel_nofault(trampoline, (void *)start_offset, size);
if (WARN_ON(ret < 0))
goto fail;
@@ -363,13 +363,13 @@ create_trampoline(struct ftrace_ops *ops, unsigned int *tramp_size)
/* The trampoline ends with ret(q) */
retq = (unsigned long)ftrace_stub;
- ret = probe_kernel_read(ip, (void *)retq, RET_SIZE);
+ ret = copy_from_kernel_nofault(ip, (void *)retq, RET_SIZE);
if (WARN_ON(ret < 0))
goto fail;
if (ops->flags & FTRACE_OPS_FL_SAVE_REGS) {
ip = trampoline + (ftrace_regs_caller_ret - ftrace_regs_caller);
- ret = probe_kernel_read(ip, (void *)retq, RET_SIZE);
+ ret = copy_from_kernel_nofault(ip, (void *)retq, RET_SIZE);
if (WARN_ON(ret < 0))
goto fail;
}
@@ -506,7 +506,7 @@ static void *addr_from_call(void *ptr)
union text_poke_insn call;
int ret;
- ret = probe_kernel_read(&call, ptr, CALL_INSN_SIZE);
+ ret = copy_from_kernel_nofault(&call, ptr, CALL_INSN_SIZE);
if (WARN_ON_ONCE(ret < 0))
return NULL;
diff --git a/arch/x86/kernel/kgdb.c b/arch/x86/kernel/kgdb.c
index c44fe7d8d9a4..68acd30c6b87 100644
--- a/arch/x86/kernel/kgdb.c
+++ b/arch/x86/kernel/kgdb.c
@@ -732,11 +732,11 @@ int kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt)
int err;
bpt->type = BP_BREAKPOINT;
- err = probe_kernel_read(bpt->saved_instr, (char *)bpt->bpt_addr,
+ err = copy_from_kernel_nofault(bpt->saved_instr, (char *)bpt->bpt_addr,
BREAK_INSTR_SIZE);
if (err)
return err;
- err = probe_kernel_write((char *)bpt->bpt_addr,
+ err = copy_to_kernel_nofault((char *)bpt->bpt_addr,
arch_kgdb_ops.gdb_bpt_instr, BREAK_INSTR_SIZE);
if (!err)
return err;
@@ -768,7 +768,7 @@ int kgdb_arch_remove_breakpoint(struct kgdb_bkpt *bpt)
return 0;
knl_write:
- return probe_kernel_write((char *)bpt->bpt_addr,
+ return copy_to_kernel_nofault((char *)bpt->bpt_addr,
(char *)bpt->saved_instr, BREAK_INSTR_SIZE);
}
diff --git a/arch/x86/kernel/kprobes/core.c b/arch/x86/kernel/kprobes/core.c
index 3bafe1bd4dc7..ada39ddbc922 100644
--- a/arch/x86/kernel/kprobes/core.c
+++ b/arch/x86/kernel/kprobes/core.c
@@ -243,7 +243,7 @@ __recover_probed_insn(kprobe_opcode_t *buf, unsigned long addr)
* Fortunately, we know that the original code is the ideal 5-byte
* long NOP.
*/
- if (probe_kernel_read(buf, (void *)addr,
+ if (copy_from_kernel_nofault(buf, (void *)addr,
MAX_INSN_SIZE * sizeof(kprobe_opcode_t)))
return 0UL;
@@ -346,7 +346,8 @@ int __copy_instruction(u8 *dest, u8 *src, u8 *real, struct insn *insn)
return 0;
/* This can access kernel text if given address is not recovered */
- if (probe_kernel_read(dest, (void *)recovered_insn, MAX_INSN_SIZE))
+ if (copy_from_kernel_nofault(dest, (void *)recovered_insn,
+ MAX_INSN_SIZE))
return 0;
kernel_insn_init(insn, dest, MAX_INSN_SIZE);
@@ -753,16 +754,11 @@ asm(
NOKPROBE_SYMBOL(kretprobe_trampoline);
STACK_FRAME_NON_STANDARD(kretprobe_trampoline);
-static struct kprobe kretprobe_kprobe = {
- .addr = (void *)kretprobe_trampoline,
-};
-
/*
* Called from kretprobe_trampoline
*/
__used __visible void *trampoline_handler(struct pt_regs *regs)
{
- struct kprobe_ctlblk *kcb;
struct kretprobe_instance *ri = NULL;
struct hlist_head *head, empty_rp;
struct hlist_node *tmp;
@@ -772,16 +768,12 @@ __used __visible void *trampoline_handler(struct pt_regs *regs)
void *frame_pointer;
bool skipped = false;
- preempt_disable();
-
/*
* Set a dummy kprobe for avoiding kretprobe recursion.
* Since kretprobe never run in kprobe handler, kprobe must not
* be running at this point.
*/
- kcb = get_kprobe_ctlblk();
- __this_cpu_write(current_kprobe, &kretprobe_kprobe);
- kcb->kprobe_status = KPROBE_HIT_ACTIVE;
+ kprobe_busy_begin();
INIT_HLIST_HEAD(&empty_rp);
kretprobe_hash_lock(current, &head, &flags);
@@ -857,7 +849,7 @@ __used __visible void *trampoline_handler(struct pt_regs *regs)
__this_cpu_write(current_kprobe, &ri->rp->kp);
ri->ret_addr = correct_ret_addr;
ri->rp->handler(ri, regs);
- __this_cpu_write(current_kprobe, &kretprobe_kprobe);
+ __this_cpu_write(current_kprobe, &kprobe_busy);
}
recycle_rp_inst(ri, &empty_rp);
@@ -873,8 +865,7 @@ __used __visible void *trampoline_handler(struct pt_regs *regs)
kretprobe_hash_unlock(current, &flags);
- __this_cpu_write(current_kprobe, NULL);
- preempt_enable();
+ kprobe_busy_end();
hlist_for_each_entry_safe(ri, tmp, &empty_rp, hlist) {
hlist_del(&ri->hlist);
diff --git a/arch/x86/kernel/kprobes/opt.c b/arch/x86/kernel/kprobes/opt.c
index 321c19950285..7af4c61dde52 100644
--- a/arch/x86/kernel/kprobes/opt.c
+++ b/arch/x86/kernel/kprobes/opt.c
@@ -56,7 +56,7 @@ found:
* overwritten by jump destination address. In this case, original
* bytes must be recovered from op->optinsn.copied_insn buffer.
*/
- if (probe_kernel_read(buf, (void *)addr,
+ if (copy_from_kernel_nofault(buf, (void *)addr,
MAX_INSN_SIZE * sizeof(kprobe_opcode_t)))
return 0UL;
diff --git a/arch/x86/kernel/probe_roms.c b/arch/x86/kernel/probe_roms.c
index ee0286390a4c..9e1def3744f2 100644
--- a/arch/x86/kernel/probe_roms.c
+++ b/arch/x86/kernel/probe_roms.c
@@ -94,12 +94,12 @@ static bool match_id(struct pci_dev *pdev, unsigned short vendor, unsigned short
}
static bool probe_list(struct pci_dev *pdev, unsigned short vendor,
- const unsigned char *rom_list)
+ const void *rom_list)
{
unsigned short device;
do {
- if (probe_kernel_address(rom_list, device) != 0)
+ if (get_kernel_nofault(device, rom_list) != 0)
device = 0;
if (device && match_id(pdev, vendor, device))
@@ -119,19 +119,19 @@ static struct resource *find_oprom(struct pci_dev *pdev)
for (i = 0; i < ARRAY_SIZE(adapter_rom_resources); i++) {
struct resource *res = &adapter_rom_resources[i];
unsigned short offset, vendor, device, list, rev;
- const unsigned char *rom;
+ const void *rom;
if (res->end == 0)
break;
rom = isa_bus_to_virt(res->start);
- if (probe_kernel_address(rom + 0x18, offset) != 0)
+ if (get_kernel_nofault(offset, rom + 0x18) != 0)
continue;
- if (probe_kernel_address(rom + offset + 0x4, vendor) != 0)
+ if (get_kernel_nofault(vendor, rom + offset + 0x4) != 0)
continue;
- if (probe_kernel_address(rom + offset + 0x6, device) != 0)
+ if (get_kernel_nofault(device, rom + offset + 0x6) != 0)
continue;
if (match_id(pdev, vendor, device)) {
@@ -139,8 +139,8 @@ static struct resource *find_oprom(struct pci_dev *pdev)
break;
}
- if (probe_kernel_address(rom + offset + 0x8, list) == 0 &&
- probe_kernel_address(rom + offset + 0xc, rev) == 0 &&
+ if (get_kernel_nofault(list, rom + offset + 0x8) == 0 &&
+ get_kernel_nofault(rev, rom + offset + 0xc) == 0 &&
rev >= 3 && list &&
probe_list(pdev, vendor, rom + offset + list)) {
oprom = res;
@@ -183,14 +183,14 @@ static int __init romsignature(const unsigned char *rom)
const unsigned short * const ptr = (const unsigned short *)rom;
unsigned short sig;
- return probe_kernel_address(ptr, sig) == 0 && sig == ROMSIGNATURE;
+ return get_kernel_nofault(sig, ptr) == 0 && sig == ROMSIGNATURE;
}
static int __init romchecksum(const unsigned char *rom, unsigned long length)
{
unsigned char sum, c;
- for (sum = 0; length && probe_kernel_address(rom++, c) == 0; length--)
+ for (sum = 0; length && get_kernel_nofault(c, rom++) == 0; length--)
sum += c;
return !length && !sum;
}
@@ -211,7 +211,7 @@ void __init probe_roms(void)
video_rom_resource.start = start;
- if (probe_kernel_address(rom + 2, c) != 0)
+ if (get_kernel_nofault(c, rom + 2) != 0)
continue;
/* 0 < length <= 0x7f * 512, historically */
@@ -249,7 +249,7 @@ void __init probe_roms(void)
if (!romsignature(rom))
continue;
- if (probe_kernel_address(rom + 2, c) != 0)
+ if (get_kernel_nofault(c, rom + 2) != 0)
continue;
/* 0 < length <= 0x7f * 512, historically */
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index 1d9ea2101b97..f58679e487f6 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -492,7 +492,8 @@ static enum kernel_gp_hint get_kernel_gp_address(struct pt_regs *regs,
u8 insn_buf[MAX_INSN_SIZE];
struct insn insn;
- if (probe_kernel_read(insn_buf, (void *)regs->ip, MAX_INSN_SIZE))
+ if (copy_from_kernel_nofault(insn_buf, (void *)regs->ip,
+ MAX_INSN_SIZE))
return GP_NO_HINT;
kernel_insn_init(&insn, insn_buf, MAX_INSN_SIZE);
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 34a7e0533dad..5bf72fc86a8e 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -169,6 +169,18 @@ static void kvm_apic_map_free(struct rcu_head *rcu)
kvfree(map);
}
+/*
+ * CLEAN -> DIRTY and UPDATE_IN_PROGRESS -> DIRTY changes happen without a lock.
+ *
+ * DIRTY -> UPDATE_IN_PROGRESS and UPDATE_IN_PROGRESS -> CLEAN happen with
+ * apic_map_lock_held.
+ */
+enum {
+ CLEAN,
+ UPDATE_IN_PROGRESS,
+ DIRTY
+};
+
void kvm_recalculate_apic_map(struct kvm *kvm)
{
struct kvm_apic_map *new, *old = NULL;
@@ -176,17 +188,17 @@ void kvm_recalculate_apic_map(struct kvm *kvm)
int i;
u32 max_id = 255; /* enough space for any xAPIC ID */
- if (!kvm->arch.apic_map_dirty) {
- /*
- * Read kvm->arch.apic_map_dirty before
- * kvm->arch.apic_map
- */
- smp_rmb();
+ /* Read kvm->arch.apic_map_dirty before kvm->arch.apic_map. */
+ if (atomic_read_acquire(&kvm->arch.apic_map_dirty) == CLEAN)
return;
- }
mutex_lock(&kvm->arch.apic_map_lock);
- if (!kvm->arch.apic_map_dirty) {
+ /*
+ * Read kvm->arch.apic_map_dirty before kvm->arch.apic_map
+ * (if clean) or the APIC registers (if dirty).
+ */
+ if (atomic_cmpxchg_acquire(&kvm->arch.apic_map_dirty,
+ DIRTY, UPDATE_IN_PROGRESS) == CLEAN) {
/* Someone else has updated the map. */
mutex_unlock(&kvm->arch.apic_map_lock);
return;
@@ -256,11 +268,11 @@ out:
lockdep_is_held(&kvm->arch.apic_map_lock));
rcu_assign_pointer(kvm->arch.apic_map, new);
/*
- * Write kvm->arch.apic_map before
- * clearing apic->apic_map_dirty
+ * Write kvm->arch.apic_map before clearing apic->apic_map_dirty.
+ * If another update has come in, leave it DIRTY.
*/
- smp_wmb();
- kvm->arch.apic_map_dirty = false;
+ atomic_cmpxchg_release(&kvm->arch.apic_map_dirty,
+ UPDATE_IN_PROGRESS, CLEAN);
mutex_unlock(&kvm->arch.apic_map_lock);
if (old)
@@ -282,20 +294,20 @@ static inline void apic_set_spiv(struct kvm_lapic *apic, u32 val)
else
static_key_slow_inc(&apic_sw_disabled.key);
- apic->vcpu->kvm->arch.apic_map_dirty = true;
+ atomic_set_release(&apic->vcpu->kvm->arch.apic_map_dirty, DIRTY);
}
}
static inline void kvm_apic_set_xapic_id(struct kvm_lapic *apic, u8 id)
{
kvm_lapic_set_reg(apic, APIC_ID, id << 24);
- apic->vcpu->kvm->arch.apic_map_dirty = true;
+ atomic_set_release(&apic->vcpu->kvm->arch.apic_map_dirty, DIRTY);
}
static inline void kvm_apic_set_ldr(struct kvm_lapic *apic, u32 id)
{
kvm_lapic_set_reg(apic, APIC_LDR, id);
- apic->vcpu->kvm->arch.apic_map_dirty = true;
+ atomic_set_release(&apic->vcpu->kvm->arch.apic_map_dirty, DIRTY);
}
static inline u32 kvm_apic_calc_x2apic_ldr(u32 id)
@@ -311,7 +323,7 @@ static inline void kvm_apic_set_x2apic_id(struct kvm_lapic *apic, u32 id)
kvm_lapic_set_reg(apic, APIC_ID, id);
kvm_lapic_set_reg(apic, APIC_LDR, ldr);
- apic->vcpu->kvm->arch.apic_map_dirty = true;
+ atomic_set_release(&apic->vcpu->kvm->arch.apic_map_dirty, DIRTY);
}
static inline int apic_lvt_enabled(struct kvm_lapic *apic, int lvt_type)
@@ -1976,7 +1988,7 @@ int kvm_lapic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val)
case APIC_DFR:
if (!apic_x2apic_mode(apic)) {
kvm_lapic_set_reg(apic, APIC_DFR, val | 0x0FFFFFFF);
- apic->vcpu->kvm->arch.apic_map_dirty = true;
+ atomic_set_release(&apic->vcpu->kvm->arch.apic_map_dirty, DIRTY);
} else
ret = 1;
break;
@@ -2232,7 +2244,7 @@ void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value)
static_key_slow_dec_deferred(&apic_hw_disabled);
} else {
static_key_slow_inc(&apic_hw_disabled.key);
- vcpu->kvm->arch.apic_map_dirty = true;
+ atomic_set_release(&apic->vcpu->kvm->arch.apic_map_dirty, DIRTY);
}
}
@@ -2273,7 +2285,6 @@ void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init_event)
if (!apic)
return;
- vcpu->kvm->arch.apic_map_dirty = false;
/* Stop the timer in case it's a reset to an active apic */
hrtimer_cancel(&apic->lapic_timer.timer);
@@ -2567,6 +2578,7 @@ int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s)
}
memcpy(vcpu->arch.apic->regs, s->regs, sizeof(*s));
+ atomic_set_release(&apic->vcpu->kvm->arch.apic_map_dirty, DIRTY);
kvm_recalculate_apic_map(vcpu->kvm);
kvm_apic_set_version(vcpu);
diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h
index 0ad06bfe2c2c..444bb9c54548 100644
--- a/arch/x86/kvm/mmu.h
+++ b/arch/x86/kvm/mmu.h
@@ -222,7 +222,7 @@ void kvm_mmu_gfn_disallow_lpage(struct kvm_memory_slot *slot, gfn_t gfn);
void kvm_mmu_gfn_allow_lpage(struct kvm_memory_slot *slot, gfn_t gfn);
bool kvm_mmu_slot_gfn_write_protect(struct kvm *kvm,
struct kvm_memory_slot *slot, u64 gfn);
-int kvm_arch_write_log_dirty(struct kvm_vcpu *vcpu);
+int kvm_arch_write_log_dirty(struct kvm_vcpu *vcpu, gpa_t l2_gpa);
int kvm_mmu_post_init_vm(struct kvm *kvm);
void kvm_mmu_pre_destroy_vm(struct kvm *kvm);
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index fdd05c233308..76817d13c86e 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -1745,10 +1745,10 @@ void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
* Emulate arch specific page modification logging for the
* nested hypervisor
*/
-int kvm_arch_write_log_dirty(struct kvm_vcpu *vcpu)
+int kvm_arch_write_log_dirty(struct kvm_vcpu *vcpu, gpa_t l2_gpa)
{
if (kvm_x86_ops.write_log_dirty)
- return kvm_x86_ops.write_log_dirty(vcpu);
+ return kvm_x86_ops.write_log_dirty(vcpu, l2_gpa);
return 0;
}
diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h
index a6d484ea110b..bd70ece1ef8b 100644
--- a/arch/x86/kvm/mmu/paging_tmpl.h
+++ b/arch/x86/kvm/mmu/paging_tmpl.h
@@ -235,7 +235,7 @@ static inline unsigned FNAME(gpte_access)(u64 gpte)
static int FNAME(update_accessed_dirty_bits)(struct kvm_vcpu *vcpu,
struct kvm_mmu *mmu,
struct guest_walker *walker,
- int write_fault)
+ gpa_t addr, int write_fault)
{
unsigned level, index;
pt_element_t pte, orig_pte;
@@ -260,7 +260,7 @@ static int FNAME(update_accessed_dirty_bits)(struct kvm_vcpu *vcpu,
!(pte & PT_GUEST_DIRTY_MASK)) {
trace_kvm_mmu_set_dirty_bit(table_gfn, index, sizeof(pte));
#if PTTYPE == PTTYPE_EPT
- if (kvm_arch_write_log_dirty(vcpu))
+ if (kvm_arch_write_log_dirty(vcpu, addr))
return -EINVAL;
#endif
pte |= PT_GUEST_DIRTY_MASK;
@@ -360,7 +360,6 @@ retry_walk:
++walker->level;
do {
- gfn_t real_gfn;
unsigned long host_addr;
pt_access = pte_access;
@@ -375,7 +374,7 @@ retry_walk:
walker->table_gfn[walker->level - 1] = table_gfn;
walker->pte_gpa[walker->level - 1] = pte_gpa;
- real_gfn = mmu->translate_gpa(vcpu, gfn_to_gpa(table_gfn),
+ real_gpa = mmu->translate_gpa(vcpu, gfn_to_gpa(table_gfn),
nested_access,
&walker->fault);
@@ -389,12 +388,10 @@ retry_walk:
* information to fix the exit_qualification or exit_info_1
* fields.
*/
- if (unlikely(real_gfn == UNMAPPED_GVA))
+ if (unlikely(real_gpa == UNMAPPED_GVA))
return 0;
- real_gfn = gpa_to_gfn(real_gfn);
-
- host_addr = kvm_vcpu_gfn_to_hva_prot(vcpu, real_gfn,
+ host_addr = kvm_vcpu_gfn_to_hva_prot(vcpu, gpa_to_gfn(real_gpa),
&walker->pte_writable[walker->level - 1]);
if (unlikely(kvm_is_error_hva(host_addr)))
goto error;
@@ -457,7 +454,8 @@ retry_walk:
(PT_GUEST_DIRTY_SHIFT - PT_GUEST_ACCESSED_SHIFT);
if (unlikely(!accessed_dirty)) {
- ret = FNAME(update_accessed_dirty_bits)(vcpu, mmu, walker, write_fault);
+ ret = FNAME(update_accessed_dirty_bits)(vcpu, mmu, walker,
+ addr, write_fault);
if (unlikely(ret < 0))
goto error;
else if (ret)
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 8ccfa4197d9c..c0da4dd78ac5 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -3344,7 +3344,7 @@ static fastpath_t svm_exit_handlers_fastpath(struct kvm_vcpu *vcpu)
void __svm_vcpu_run(unsigned long vmcb_pa, unsigned long *regs);
-static fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu)
+static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu)
{
fastpath_t exit_fastpath;
struct vcpu_svm *svm = to_svm(vcpu);
diff --git a/arch/x86/kvm/vmx/vmcs.h b/arch/x86/kvm/vmx/vmcs.h
index 5c0ff80b85c0..7a3675fddec2 100644
--- a/arch/x86/kvm/vmx/vmcs.h
+++ b/arch/x86/kvm/vmx/vmcs.h
@@ -72,11 +72,24 @@ struct loaded_vmcs {
struct vmcs_controls_shadow controls_shadow;
};
+static inline bool is_intr_type(u32 intr_info, u32 type)
+{
+ const u32 mask = INTR_INFO_VALID_MASK | INTR_INFO_INTR_TYPE_MASK;
+
+ return (intr_info & mask) == (INTR_INFO_VALID_MASK | type);
+}
+
+static inline bool is_intr_type_n(u32 intr_info, u32 type, u8 vector)
+{
+ const u32 mask = INTR_INFO_VALID_MASK | INTR_INFO_INTR_TYPE_MASK |
+ INTR_INFO_VECTOR_MASK;
+
+ return (intr_info & mask) == (INTR_INFO_VALID_MASK | type | vector);
+}
+
static inline bool is_exception_n(u32 intr_info, u8 vector)
{
- return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
- INTR_INFO_VALID_MASK)) ==
- (INTR_TYPE_HARD_EXCEPTION | vector | INTR_INFO_VALID_MASK);
+ return is_intr_type_n(intr_info, INTR_TYPE_HARD_EXCEPTION, vector);
}
static inline bool is_debug(u32 intr_info)
@@ -106,28 +119,23 @@ static inline bool is_gp_fault(u32 intr_info)
static inline bool is_machine_check(u32 intr_info)
{
- return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
- INTR_INFO_VALID_MASK)) ==
- (INTR_TYPE_HARD_EXCEPTION | MC_VECTOR | INTR_INFO_VALID_MASK);
+ return is_exception_n(intr_info, MC_VECTOR);
}
/* Undocumented: icebp/int1 */
static inline bool is_icebp(u32 intr_info)
{
- return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
- == (INTR_TYPE_PRIV_SW_EXCEPTION | INTR_INFO_VALID_MASK);
+ return is_intr_type(intr_info, INTR_TYPE_PRIV_SW_EXCEPTION);
}
static inline bool is_nmi(u32 intr_info)
{
- return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
- == (INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK);
+ return is_intr_type(intr_info, INTR_TYPE_NMI_INTR);
}
static inline bool is_external_intr(u32 intr_info)
{
- return (intr_info & (INTR_INFO_VALID_MASK | INTR_INFO_INTR_TYPE_MASK))
- == (INTR_INFO_VALID_MASK | INTR_TYPE_EXT_INTR);
+ return is_intr_type(intr_info, INTR_TYPE_EXT_INTR);
}
enum vmcs_field_width {
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 36c771728c8c..cb22f33bf1d8 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -6606,23 +6606,6 @@ static void atomic_switch_perf_msrs(struct vcpu_vmx *vmx)
msrs[i].host, false);
}
-static void atomic_switch_umwait_control_msr(struct vcpu_vmx *vmx)
-{
- u32 host_umwait_control;
-
- if (!vmx_has_waitpkg(vmx))
- return;
-
- host_umwait_control = get_umwait_control_msr();
-
- if (vmx->msr_ia32_umwait_control != host_umwait_control)
- add_atomic_switch_msr(vmx, MSR_IA32_UMWAIT_CONTROL,
- vmx->msr_ia32_umwait_control,
- host_umwait_control, false);
- else
- clear_atomic_switch_msr(vmx, MSR_IA32_UMWAIT_CONTROL);
-}
-
static void vmx_update_hv_timer(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
@@ -6728,9 +6711,7 @@ reenter_guest:
pt_guest_enter(vmx);
- if (vcpu_to_pmu(vcpu)->version)
- atomic_switch_perf_msrs(vmx);
- atomic_switch_umwait_control_msr(vmx);
+ atomic_switch_perf_msrs(vmx);
if (enable_preemption_timer)
vmx_update_hv_timer(vcpu);
@@ -7501,11 +7482,11 @@ static void vmx_flush_log_dirty(struct kvm *kvm)
kvm_flush_pml_buffers(kvm);
}
-static int vmx_write_pml_buffer(struct kvm_vcpu *vcpu)
+static int vmx_write_pml_buffer(struct kvm_vcpu *vcpu, gpa_t gpa)
{
struct vmcs12 *vmcs12;
struct vcpu_vmx *vmx = to_vmx(vcpu);
- gpa_t gpa, dst;
+ gpa_t dst;
if (is_guest_mode(vcpu)) {
WARN_ON_ONCE(vmx->nested.pml_full);
@@ -7524,7 +7505,7 @@ static int vmx_write_pml_buffer(struct kvm_vcpu *vcpu)
return 1;
}
- gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS) & ~0xFFFull;
+ gpa &= ~0xFFFull;
dst = vmcs12->pml_address + sizeof(u64) * vmcs12->guest_pml_index;
if (kvm_write_guest_page(vcpu->kvm, gpa_to_gfn(dst), &gpa,
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index 8a83b5edc820..639798e4a6ca 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -288,8 +288,6 @@ struct vcpu_vmx {
u64 current_tsc_ratio;
- u32 host_pkru;
-
unsigned long host_debugctlmsr;
/*
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 00c88c2f34e4..3b92db412335 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2856,7 +2856,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
return kvm_mtrr_set_msr(vcpu, msr, data);
case MSR_IA32_APICBASE:
return kvm_set_apic_base(vcpu, msr_info);
- case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
+ case APIC_BASE_MSR ... APIC_BASE_MSR + 0xff:
return kvm_x2apic_msr_write(vcpu, msr, data);
case MSR_IA32_TSCDEADLINE:
kvm_set_lapic_tscdeadline_msr(vcpu, data);
@@ -3196,7 +3196,7 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
case MSR_IA32_APICBASE:
msr_info->data = kvm_get_apic_base(vcpu);
break;
- case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
+ case APIC_BASE_MSR ... APIC_BASE_MSR + 0xff:
return kvm_x2apic_msr_read(vcpu, msr_info->index, &msr_info->data);
case MSR_IA32_TSCDEADLINE:
msr_info->data = kvm_get_lapic_tscdeadline_msr(vcpu);
@@ -4603,7 +4603,8 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
r = -EINVAL;
user_tsc_khz = (u32)arg;
- if (user_tsc_khz >= kvm_max_guest_tsc_khz)
+ if (kvm_has_tsc_control &&
+ user_tsc_khz >= kvm_max_guest_tsc_khz)
goto out;
if (user_tsc_khz == 0)
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 66be9bd60307..1ead568c0101 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -99,7 +99,7 @@ check_prefetch_opcode(struct pt_regs *regs, unsigned char *instr,
return !instr_lo || (instr_lo>>1) == 1;
case 0x00:
/* Prefetch instruction is 0x0F0D or 0x0F18 */
- if (probe_kernel_address(instr, opcode))
+ if (get_kernel_nofault(opcode, instr))
return 0;
*prefetch = (instr_lo == 0xF) &&
@@ -133,7 +133,7 @@ is_prefetch(struct pt_regs *regs, unsigned long error_code, unsigned long addr)
while (instr < max_instr) {
unsigned char opcode;
- if (probe_kernel_address(instr, opcode))
+ if (get_kernel_nofault(opcode, instr))
break;
instr++;
@@ -301,7 +301,7 @@ static int bad_address(void *p)
{
unsigned long dummy;
- return probe_kernel_address((unsigned long *)p, dummy);
+ return get_kernel_nofault(dummy, (unsigned long *)p);
}
static void dump_pagetable(unsigned long address)
@@ -442,7 +442,7 @@ static void show_ldttss(const struct desc_ptr *gdt, const char *name, u16 index)
return;
}
- if (probe_kernel_read(&desc, (void *)(gdt->address + offset),
+ if (copy_from_kernel_nofault(&desc, (void *)(gdt->address + offset),
sizeof(struct ldttss_desc))) {
pr_alert("%s: 0x%hx -- GDT entry is not readable\n",
name, index);
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index bda909e3e37e..8b4afad84f4a 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -737,7 +737,7 @@ static void __init test_wp_bit(void)
__set_fixmap(FIX_WP_TEST, __pa_symbol(empty_zero_page), PAGE_KERNEL_RO);
- if (probe_kernel_write((char *)fix_to_virt(FIX_WP_TEST), &z, 1)) {
+ if (copy_to_kernel_nofault((char *)fix_to_virt(FIX_WP_TEST), &z, 1)) {
clear_fixmap(FIX_WP_TEST);
printk(KERN_CONT "Ok.\n");
return;
diff --git a/arch/x86/mm/maccess.c b/arch/x86/mm/maccess.c
index e1d7d7477c22..92ec176a7293 100644
--- a/arch/x86/mm/maccess.c
+++ b/arch/x86/mm/maccess.c
@@ -9,7 +9,7 @@ static __always_inline u64 canonical_address(u64 vaddr, u8 vaddr_bits)
return ((s64)vaddr << (64 - vaddr_bits)) >> (64 - vaddr_bits);
}
-bool probe_kernel_read_allowed(const void *unsafe_src, size_t size)
+bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size)
{
unsigned long vaddr = (unsigned long)unsafe_src;
@@ -22,7 +22,7 @@ bool probe_kernel_read_allowed(const void *unsafe_src, size_t size)
canonical_address(vaddr, boot_cpu_data.x86_virt_bits) == vaddr;
}
#else
-bool probe_kernel_read_allowed(const void *unsafe_src, size_t size)
+bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size)
{
return (unsigned long)unsafe_src >= TASK_SIZE_MAX;
}
diff --git a/arch/x86/pci/pcbios.c b/arch/x86/pci/pcbios.c
index 9c97d814125e..4f15280732ed 100644
--- a/arch/x86/pci/pcbios.c
+++ b/arch/x86/pci/pcbios.c
@@ -302,7 +302,7 @@ static const struct pci_raw_ops *__init pci_find_bios(void)
check <= (union bios32 *) __va(0xffff0);
++check) {
long sig;
- if (probe_kernel_address(&check->fields.signature, sig))
+ if (get_kernel_nofault(sig, &check->fields.signature))
continue;
if (check->fields.signature != BIOS32_SIGNATURE)
diff --git a/arch/x86/platform/intel-mid/sfi.c b/arch/x86/platform/intel-mid/sfi.c
index b8f7f193f383..30bd5714a3d4 100644
--- a/arch/x86/platform/intel-mid/sfi.c
+++ b/arch/x86/platform/intel-mid/sfi.c
@@ -287,8 +287,8 @@ void intel_scu_devices_create(void)
adapter = i2c_get_adapter(i2c_bus[i]);
if (adapter) {
- client = i2c_new_device(adapter, i2c_devs[i]);
- if (!client)
+ client = i2c_new_client_device(adapter, i2c_devs[i]);
+ if (IS_ERR(client))
pr_err("can't create i2c device %s\n",
i2c_devs[i]->type);
} else
diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile
index b04e6e72a592..088bd764e0b7 100644
--- a/arch/x86/purgatory/Makefile
+++ b/arch/x86/purgatory/Makefile
@@ -34,6 +34,7 @@ KCOV_INSTRUMENT := n
PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel
PURGATORY_CFLAGS := -mcmodel=large -ffreestanding -fno-zero-initialized-in-bss
PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN) -DDISABLE_BRANCH_PROFILING
+PURGATORY_CFLAGS += $(call cc-option,-fno-stack-protector)
# Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That
# in turn leaves some undefined symbols like __fentry__ in purgatory and not
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index 33b309d65955..acc49fa6a097 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -386,7 +386,7 @@ static void set_aliased_prot(void *v, pgprot_t prot)
preempt_disable();
- probe_kernel_read(&dummy, v, 1);
+ copy_from_kernel_nofault(&dummy, v, 1);
if (HYPERVISOR_update_va_mapping((unsigned long)v, pte, 0))
BUG();