summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/irq.c5
-rw-r--r--arch/powerpc/kernel/isa-bridge.c28
-rw-r--r--arch/powerpc/kernel/nvram_64.c4
-rw-r--r--arch/powerpc/kernel/pci_64.c54
-rw-r--r--arch/powerpc/kernel/syscalls/syscall.tbl1
-rw-r--r--arch/powerpc/kernel/traps.c22
-rw-r--r--arch/powerpc/kernel/vmlinux.lds.S1
7 files changed, 68 insertions, 47 deletions
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 1f1169856dc8..112d150354b2 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -748,9 +748,8 @@ void do_IRQ(struct pt_regs *regs)
static void *__init alloc_vm_stack(void)
{
- return __vmalloc_node_range(THREAD_SIZE, THREAD_ALIGN, VMALLOC_START,
- VMALLOC_END, THREADINFO_GFP, PAGE_KERNEL,
- 0, NUMA_NO_NODE, (void*)_RET_IP_);
+ return __vmalloc_node(THREAD_SIZE, THREAD_ALIGN, THREADINFO_GFP,
+ NUMA_NO_NODE, (void *)_RET_IP_);
}
static void __init vmap_irqstack_init(void)
diff --git a/arch/powerpc/kernel/isa-bridge.c b/arch/powerpc/kernel/isa-bridge.c
index 773671b512df..2257d24e6a26 100644
--- a/arch/powerpc/kernel/isa-bridge.c
+++ b/arch/powerpc/kernel/isa-bridge.c
@@ -18,6 +18,7 @@
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/notifier.h>
+#include <linux/vmalloc.h>
#include <asm/processor.h>
#include <asm/io.h>
@@ -38,6 +39,22 @@ EXPORT_SYMBOL_GPL(isa_bridge_pcidev);
#define ISA_SPACE_MASK 0x1
#define ISA_SPACE_IO 0x1
+static void remap_isa_base(phys_addr_t pa, unsigned long size)
+{
+ WARN_ON_ONCE(ISA_IO_BASE & ~PAGE_MASK);
+ WARN_ON_ONCE(pa & ~PAGE_MASK);
+ WARN_ON_ONCE(size & ~PAGE_MASK);
+
+ if (slab_is_available()) {
+ if (ioremap_page_range(ISA_IO_BASE, ISA_IO_BASE + size, pa,
+ pgprot_noncached(PAGE_KERNEL)))
+ unmap_kernel_range(ISA_IO_BASE, size);
+ } else {
+ early_ioremap_range(ISA_IO_BASE, pa, size,
+ pgprot_noncached(PAGE_KERNEL));
+ }
+}
+
static void pci_process_ISA_OF_ranges(struct device_node *isa_node,
unsigned long phb_io_base_phys)
{
@@ -105,15 +122,13 @@ static void pci_process_ISA_OF_ranges(struct device_node *isa_node,
if (size > 0x10000)
size = 0x10000;
- __ioremap_at(phb_io_base_phys, (void *)ISA_IO_BASE,
- size, pgprot_noncached(PAGE_KERNEL));
+ remap_isa_base(phb_io_base_phys, size);
return;
inval_range:
printk(KERN_ERR "no ISA IO ranges or unexpected isa range, "
"mapping 64k\n");
- __ioremap_at(phb_io_base_phys, (void *)ISA_IO_BASE,
- 0x10000, pgprot_noncached(PAGE_KERNEL));
+ remap_isa_base(phb_io_base_phys, 0x10000);
}
@@ -248,8 +263,7 @@ void __init isa_bridge_init_non_pci(struct device_node *np)
* and map it
*/
isa_io_base = ISA_IO_BASE;
- __ioremap_at(pbase, (void *)ISA_IO_BASE,
- size, pgprot_noncached(PAGE_KERNEL));
+ remap_isa_base(pbase, size);
pr_debug("ISA: Non-PCI bridge is %pOF\n", np);
}
@@ -297,7 +311,7 @@ static void isa_bridge_remove(void)
isa_bridge_pcidev = NULL;
/* Unmap the ISA area */
- __iounmap_at((void *)ISA_IO_BASE, 0x10000);
+ unmap_kernel_range(ISA_IO_BASE, 0x10000);
}
/**
diff --git a/arch/powerpc/kernel/nvram_64.c b/arch/powerpc/kernel/nvram_64.c
index fb4f61096613..0cd1c88bfc8b 100644
--- a/arch/powerpc/kernel/nvram_64.c
+++ b/arch/powerpc/kernel/nvram_64.c
@@ -655,9 +655,7 @@ static void oops_to_nvram(struct kmsg_dumper *dumper,
int rc = -1;
switch (reason) {
- case KMSG_DUMP_RESTART:
- case KMSG_DUMP_HALT:
- case KMSG_DUMP_POWEROFF:
+ case KMSG_DUMP_SHUTDOWN:
/* These are almost always orderly shutdowns. */
return;
case KMSG_DUMP_OOPS:
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index f83d1f69b1dd..d9ac980c398c 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -109,23 +109,47 @@ int pcibios_unmap_io_space(struct pci_bus *bus)
/* Get the host bridge */
hose = pci_bus_to_host(bus);
- /* Check if we have IOs allocated */
- if (hose->io_base_alloc == NULL)
- return 0;
-
pr_debug("IO unmapping for PHB %pOF\n", hose->dn);
pr_debug(" alloc=0x%p\n", hose->io_base_alloc);
- /* This is a PHB, we fully unmap the IO area */
- vunmap(hose->io_base_alloc);
-
+ iounmap(hose->io_base_alloc);
return 0;
}
EXPORT_SYMBOL_GPL(pcibios_unmap_io_space);
-static int pcibios_map_phb_io_space(struct pci_controller *hose)
+void __iomem *ioremap_phb(phys_addr_t paddr, unsigned long size)
{
struct vm_struct *area;
+ unsigned long addr;
+
+ WARN_ON_ONCE(paddr & ~PAGE_MASK);
+ WARN_ON_ONCE(size & ~PAGE_MASK);
+
+ /*
+ * Let's allocate some IO space for that guy. We don't pass VM_IOREMAP
+ * because we don't care about alignment tricks that the core does in
+ * that case. Maybe we should due to stupid card with incomplete
+ * address decoding but I'd rather not deal with those outside of the
+ * reserved 64K legacy region.
+ */
+ area = __get_vm_area_caller(size, 0, PHB_IO_BASE, PHB_IO_END,
+ __builtin_return_address(0));
+ if (!area)
+ return NULL;
+
+ addr = (unsigned long)area->addr;
+ if (ioremap_page_range(addr, addr + size, paddr,
+ pgprot_noncached(PAGE_KERNEL))) {
+ unmap_kernel_range(addr, size);
+ return NULL;
+ }
+
+ return (void __iomem *)addr;
+}
+EXPORT_SYMBOL_GPL(ioremap_phb);
+
+static int pcibios_map_phb_io_space(struct pci_controller *hose)
+{
unsigned long phys_page;
unsigned long size_page;
unsigned long io_virt_offset;
@@ -146,12 +170,11 @@ static int pcibios_map_phb_io_space(struct pci_controller *hose)
* with incomplete address decoding but I'd rather not deal with
* those outside of the reserved 64K legacy region.
*/
- area = __get_vm_area(size_page, 0, PHB_IO_BASE, PHB_IO_END);
- if (area == NULL)
+ hose->io_base_alloc = ioremap_phb(phys_page, size_page);
+ if (!hose->io_base_alloc)
return -ENOMEM;
- hose->io_base_alloc = area->addr;
- hose->io_base_virt = (void __iomem *)(area->addr +
- hose->io_base_phys - phys_page);
+ hose->io_base_virt = hose->io_base_alloc +
+ hose->io_base_phys - phys_page;
pr_debug("IO mapping for PHB %pOF\n", hose->dn);
pr_debug(" phys=0x%016llx, virt=0x%p (alloc=0x%p)\n",
@@ -159,11 +182,6 @@ static int pcibios_map_phb_io_space(struct pci_controller *hose)
pr_debug(" size=0x%016llx (alloc=0x%016lx)\n",
hose->pci_io_size, size_page);
- /* Establish the mapping */
- if (__ioremap_at(phys_page, area->addr, size_page,
- pgprot_noncached(PAGE_KERNEL)) == NULL)
- return -ENOMEM;
-
/* Fixup hose IO resource */
io_virt_offset = pcibios_io_space_offset(hose);
hose->io_resource.start += io_virt_offset;
diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl
index 220ae11555f2..f833a3190822 100644
--- a/arch/powerpc/kernel/syscalls/syscall.tbl
+++ b/arch/powerpc/kernel/syscalls/syscall.tbl
@@ -527,3 +527,4 @@
435 spu clone3 sys_ni_syscall
437 common openat2 sys_openat2
438 common pidfd_getfd sys_pidfd_getfd
+439 common faccessat2 sys_faccessat2
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 3fca22276bb1..b44dd75de517 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -441,15 +441,9 @@ nonrecoverable:
void system_reset_exception(struct pt_regs *regs)
{
unsigned long hsrr0, hsrr1;
- bool nested = in_nmi();
bool saved_hsrrs = false;
- /*
- * Avoid crashes in case of nested NMI exceptions. Recoverability
- * is determined by RI and in_nmi
- */
- if (!nested)
- nmi_enter();
+ nmi_enter();
/*
* System reset can interrupt code where HSRRs are live and MSR[RI]=1.
@@ -521,8 +515,7 @@ out:
mtspr(SPRN_HSRR1, hsrr1);
}
- if (!nested)
- nmi_exit();
+ nmi_exit();
/* What should we do here? We could issue a shutdown or hard reset. */
}
@@ -823,9 +816,8 @@ int machine_check_generic(struct pt_regs *regs)
void machine_check_exception(struct pt_regs *regs)
{
int recover = 0;
- bool nested = in_nmi();
- if (!nested)
- nmi_enter();
+
+ nmi_enter();
__this_cpu_inc(irq_stat.mce_exceptions);
@@ -851,8 +843,7 @@ void machine_check_exception(struct pt_regs *regs)
if (check_io_access(regs))
goto bail;
- if (!nested)
- nmi_exit();
+ nmi_exit();
die("Machine check", regs, SIGBUS);
@@ -863,8 +854,7 @@ void machine_check_exception(struct pt_regs *regs)
return;
bail:
- if (!nested)
- nmi_exit();
+ nmi_exit();
}
void SMIException(struct pt_regs *regs)
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 31a0f201fb6f..a1706b63b82d 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -90,6 +90,7 @@ SECTIONS
#ifdef CONFIG_PPC64
*(.tramp.ftrace.text);
#endif
+ NOINSTR_TEXT
SCHED_TEXT
CPUIDLE_TEXT
LOCK_TEXT
generated by cgit v1.2.3 (git 2.46.0) at 2026-02-19 03:31:19 +0000