8 files changed, 42 insertions, 49 deletions

diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index a509e35132d2..6ad715d67df8 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -570,6 +570,20 @@ static const struct midr_range arm64_harden_el2_vectors[] = {
 
 #endif
 
+#ifdef CONFIG_ARM64_WORKAROUND_REPEAT_TLBI
+
+static const struct midr_range arm64_repeat_tlbi_cpus[] = {
+#ifdef CONFIG_QCOM_FALKOR_ERRATUM_1009
+	MIDR_RANGE(MIDR_QCOM_FALKOR_V1, 0, 0, 0, 0),
+#endif
+#ifdef CONFIG_ARM64_ERRATUM_1286807
+	MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 0),
+#endif
+	{},
+};
+
+#endif
+
 const struct arm64_cpu_capabilities arm64_errata[] = {
 #if	defined(CONFIG_ARM64_ERRATUM_826319) || \
 	defined(CONFIG_ARM64_ERRATUM_827319) || \
@@ -695,11 +709,11 @@ const struct arm64_cpu_capabilities arm64_errata[] = {
 		.matches = is_kryo_midr,
 	},
 #endif
-#ifdef CONFIG_QCOM_FALKOR_ERRATUM_1009
+#ifdef CONFIG_ARM64_WORKAROUND_REPEAT_TLBI
 	{
-		.desc = "Qualcomm Technologies Falkor erratum 1009",
+		.desc = "Qualcomm erratum 1009, ARM erratum 1286807",
 		.capability = ARM64_WORKAROUND_REPEAT_TLBI,
-		ERRATA_MIDR_REV(MIDR_QCOM_FALKOR_V1, 0, 0),
+		ERRATA_MIDR_RANGE_LIST(arm64_repeat_tlbi_cpus),
 	},
 #endif
 #ifdef CONFIG_ARM64_ERRATUM_858921
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index af50064dea51..aec5ecb85737 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -1333,7 +1333,6 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
 		.cpu_enable = cpu_enable_hw_dbm,
 	},
 #endif
-#ifdef CONFIG_ARM64_SSBD
 	{
 		.desc = "CRC32 instructions",
 		.capability = ARM64_HAS_CRC32,
@@ -1343,6 +1342,7 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
 		.field_pos = ID_AA64ISAR0_CRC32_SHIFT,
 		.min_field_value = 1,
 	},
+#ifdef CONFIG_ARM64_SSBD
 	{
 		.desc = "Speculative Store Bypassing Safe (SSBS)",
 		.capability = ARM64_SSBS,
diff --git a/arch/arm64/kernel/crash_dump.c b/arch/arm64/kernel/crash_dump.c
index f46d57c31443..6b5037ed15b2 100644
--- a/arch/arm64/kernel/crash_dump.c
+++ b/arch/arm64/kernel/crash_dump.c
@@ -58,7 +58,7 @@ ssize_t copy_oldmem_page(unsigned long pfn, char *buf,
 /**
  * elfcorehdr_read - read from ELF core header
  * @buf: buffer where the data is placed
- * @csize: number of bytes to read
+ * @count: number of bytes to read
  * @ppos: address in the memory
  *
  * This function reads @count bytes from elf core header which exists
diff --git a/arch/arm64/kernel/ftrace.c b/arch/arm64/kernel/ftrace.c
index 50986e388d2b..57e962290df3 100644
--- a/arch/arm64/kernel/ftrace.c
+++ b/arch/arm64/kernel/ftrace.c
@@ -216,8 +216,6 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
 {
 	unsigned long return_hooker = (unsigned long)&return_to_handler;
 	unsigned long old;
-	struct ftrace_graph_ent trace;
-	int err;
 
 	if (unlikely(atomic_read(&current->tracing_graph_pause)))
 		return;
@@ -229,18 +227,7 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
 	 */
 	old = *parent;
 
-	trace.func = self_addr;
-	trace.depth = current->curr_ret_stack + 1;
-
-	/* Only trace if the calling function expects to */
-	if (!ftrace_graph_entry(&trace))
-		return;
-
-	err = ftrace_push_return_trace(old, self_addr, &trace.depth,
-				       frame_pointer, NULL);
-	if (err == -EBUSY)
-		return;
-	else
+	if (!function_graph_enter(old, self_addr, frame_pointer, NULL))
 		*parent = return_hooker;
 }
 
diff --git a/arch/arm64/kernel/hibernate.c b/arch/arm64/kernel/hibernate.c
index 6b2686d54411..29cdc99688f3 100644
--- a/arch/arm64/kernel/hibernate.c
+++ b/arch/arm64/kernel/hibernate.c
@@ -214,7 +214,7 @@ static int create_safe_exec_page(void *src_start, size_t length,
 	}
 
 	memcpy((void *)dst, src_start, length);
-	flush_icache_range(dst, dst + length);
+	__flush_icache_range(dst, dst + length);
 
 	pgdp = pgd_offset_raw(allocator(mask), dst_addr);
 	if (pgd_none(READ_ONCE(*pgdp))) {
diff --git a/arch/arm64/kernel/probes/kprobes.c b/arch/arm64/kernel/probes/kprobes.c
index 9b65132e789a..2a5b338b2542 100644
--- a/arch/arm64/kernel/probes/kprobes.c
+++ b/arch/arm64/kernel/probes/kprobes.c
@@ -23,7 +23,9 @@
 #include <linux/slab.h>
 #include <linux/stop_machine.h>
 #include <linux/sched/debug.h>
+#include <linux/set_memory.h>
 #include <linux/stringify.h>
+#include <linux/vmalloc.h>
 #include <asm/traps.h>
 #include <asm/ptrace.h>
 #include <asm/cacheflush.h>
@@ -42,10 +44,21 @@ DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
 static void __kprobes
 post_kprobe_handler(struct kprobe_ctlblk *, struct pt_regs *);
 
+static int __kprobes patch_text(kprobe_opcode_t *addr, u32 opcode)
+{
+	void *addrs[1];
+	u32 insns[1];
+
+	addrs[0] = addr;
+	insns[0] = opcode;
+
+	return aarch64_insn_patch_text(addrs, insns, 1);
+}
+
 static void __kprobes arch_prepare_ss_slot(struct kprobe *p)
 {
 	/* prepare insn slot */
-	p->ainsn.api.insn[0] = cpu_to_le32(p->opcode);
+	patch_text(p->ainsn.api.insn, p->opcode);
 
 	flush_icache_range((uintptr_t) (p->ainsn.api.insn),
 			   (uintptr_t) (p->ainsn.api.insn) +
@@ -118,15 +131,15 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
 	return 0;
 }
 
-static int __kprobes patch_text(kprobe_opcode_t *addr, u32 opcode)
+void *alloc_insn_page(void)
 {
-	void *addrs[1];
-	u32 insns[1];
+	void *page;
 
-	addrs[0] = (void *)addr;
-	insns[0] = (u32)opcode;
+	page = vmalloc_exec(PAGE_SIZE);
+	if (page)
+		set_memory_ro((unsigned long)page, 1);
 
-	return aarch64_insn_patch_text(addrs, insns, 1);
+	return page;
 }
 
 /* arm kprobe: install breakpoint in text */
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index ce99c58cd1f1..d9a4c2d6dd8b 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -497,25 +497,3 @@ void arch_setup_new_exec(void)
 {
 	current->mm->context.flags = is_compat_task() ? MMCF_AARCH32 : 0;
 }
-
-#ifdef CONFIG_GCC_PLUGIN_STACKLEAK
-void __used stackleak_check_alloca(unsigned long size)
-{
-	unsigned long stack_left;
-	unsigned long current_sp = current_stack_pointer;
-	struct stack_info info;
-
-	BUG_ON(!on_accessible_stack(current, current_sp, &info));
-
-	stack_left = current_sp - info.low;
-
-	/*
-	 * There's a good chance we're almost out of stack space if this
-	 * is true. Using panic() over BUG() is more likely to give
-	 * reliable debugging output.
-	 */
-	if (size >= stack_left)
-		panic("alloca() over the kernel stack boundary\n");
-}
-EXPORT_SYMBOL(stackleak_check_alloca);
-#endif
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 953e316521fc..f4fc1e0544b7 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -313,6 +313,7 @@ void __init setup_arch(char **cmdline_p)
 	arm64_memblock_init();
 
 	paging_init();
+	efi_apply_persistent_mem_reservations();
 
 	acpi_table_upgrade();