summaryrefslogtreecommitdiff
path: root/arch/arm64/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm64/kernel')
-rw-r--r--arch/arm64/kernel/cpu_errata.c3
-rw-r--r--arch/arm64/kernel/fpsimd.c18
-rw-r--r--arch/arm64/kernel/patching.c75
-rw-r--r--arch/arm64/kernel/ptrace.c3
-rw-r--r--arch/arm64/kernel/signal.c4
-rw-r--r--arch/arm64/kernel/stacktrace.c28
-rw-r--r--arch/arm64/kernel/suspend.c3
-rw-r--r--arch/arm64/kernel/vdso.c5
8 files changed, 130 insertions, 9 deletions
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index 967c7c7a4e7d..76b8dd37092a 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -374,6 +374,7 @@ static const struct midr_range erratum_1463225[] = {
static const struct midr_range trbe_overwrite_fill_mode_cpus[] = {
#ifdef CONFIG_ARM64_ERRATUM_2139208
MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N2),
+ MIDR_ALL_VERSIONS(MIDR_MICROSOFT_AZURE_COBALT_100),
#endif
#ifdef CONFIG_ARM64_ERRATUM_2119858
MIDR_ALL_VERSIONS(MIDR_CORTEX_A710),
@@ -387,6 +388,7 @@ static const struct midr_range trbe_overwrite_fill_mode_cpus[] = {
static const struct midr_range tsb_flush_fail_cpus[] = {
#ifdef CONFIG_ARM64_ERRATUM_2067961
MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N2),
+ MIDR_ALL_VERSIONS(MIDR_MICROSOFT_AZURE_COBALT_100),
#endif
#ifdef CONFIG_ARM64_ERRATUM_2054223
MIDR_ALL_VERSIONS(MIDR_CORTEX_A710),
@@ -399,6 +401,7 @@ static const struct midr_range tsb_flush_fail_cpus[] = {
static struct midr_range trbe_write_out_of_range_cpus[] = {
#ifdef CONFIG_ARM64_ERRATUM_2253138
MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N2),
+ MIDR_ALL_VERSIONS(MIDR_MICROSOFT_AZURE_COBALT_100),
#endif
#ifdef CONFIG_ARM64_ERRATUM_2224489
MIDR_ALL_VERSIONS(MIDR_CORTEX_A710),
diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
index a5dc6f764195..f27acca550d5 100644
--- a/arch/arm64/kernel/fpsimd.c
+++ b/arch/arm64/kernel/fpsimd.c
@@ -1311,6 +1311,22 @@ void __init sme_setup(void)
get_sme_default_vl());
}
+void sme_suspend_exit(void)
+{
+ u64 smcr = 0;
+
+ if (!system_supports_sme())
+ return;
+
+ if (system_supports_fa64())
+ smcr |= SMCR_ELx_FA64;
+ if (system_supports_sme2())
+ smcr |= SMCR_ELx_EZT0;
+
+ write_sysreg_s(smcr, SYS_SMCR_EL1);
+ write_sysreg_s(0, SYS_SMPRI_EL1);
+}
+
#endif /* CONFIG_ARM64_SME */
static void sve_init_regs(void)
@@ -1635,7 +1651,7 @@ void fpsimd_preserve_current_state(void)
void fpsimd_signal_preserve_current_state(void)
{
fpsimd_preserve_current_state();
- if (test_thread_flag(TIF_SVE))
+ if (current->thread.fp_type == FP_STATE_SVE)
sve_to_fpsimd(current);
}
diff --git a/arch/arm64/kernel/patching.c b/arch/arm64/kernel/patching.c
index b4835f6d594b..255534930368 100644
--- a/arch/arm64/kernel/patching.c
+++ b/arch/arm64/kernel/patching.c
@@ -105,6 +105,81 @@ noinstr int aarch64_insn_write_literal_u64(void *addr, u64 val)
return ret;
}
+typedef void text_poke_f(void *dst, void *src, size_t patched, size_t len);
+
+static void *__text_poke(text_poke_f func, void *addr, void *src, size_t len)
+{
+ unsigned long flags;
+ size_t patched = 0;
+ size_t size;
+ void *waddr;
+ void *ptr;
+
+ raw_spin_lock_irqsave(&patch_lock, flags);
+
+ while (patched < len) {
+ ptr = addr + patched;
+ size = min_t(size_t, PAGE_SIZE - offset_in_page(ptr),
+ len - patched);
+
+ waddr = patch_map(ptr, FIX_TEXT_POKE0);
+ func(waddr, src, patched, size);
+ patch_unmap(FIX_TEXT_POKE0);
+
+ patched += size;
+ }
+ raw_spin_unlock_irqrestore(&patch_lock, flags);
+
+ flush_icache_range((uintptr_t)addr, (uintptr_t)addr + len);
+
+ return addr;
+}
+
+static void text_poke_memcpy(void *dst, void *src, size_t patched, size_t len)
+{
+ copy_to_kernel_nofault(dst, src + patched, len);
+}
+
+static void text_poke_memset(void *dst, void *src, size_t patched, size_t len)
+{
+ u32 c = *(u32 *)src;
+
+ memset32(dst, c, len / 4);
+}
+
+/**
+ * aarch64_insn_copy - Copy instructions into (an unused part of) RX memory
+ * @dst: address to modify
+ * @src: source of the copy
+ * @len: length to copy
+ *
+ * Useful for JITs to dump new code blocks into unused regions of RX memory.
+ */
+noinstr void *aarch64_insn_copy(void *dst, void *src, size_t len)
+{
+ /* A64 instructions must be word aligned */
+ if ((uintptr_t)dst & 0x3)
+ return NULL;
+
+ return __text_poke(text_poke_memcpy, dst, src, len);
+}
+
+/**
+ * aarch64_insn_set - memset for RX memory regions.
+ * @dst: address to modify
+ * @insn: value to set
+ * @len: length of memory region.
+ *
+ * Useful for JITs to fill regions of RX memory with illegal instructions.
+ */
+noinstr void *aarch64_insn_set(void *dst, u32 insn, size_t len)
+{
+ if ((uintptr_t)dst & 0x3)
+ return NULL;
+
+ return __text_poke(text_poke_memset, dst, &insn, len);
+}
+
int __kprobes aarch64_insn_patch_text_nosync(void *addr, u32 insn)
{
u32 *tp = addr;
diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c
index dc6cf0e37194..e3bef38fc2e2 100644
--- a/arch/arm64/kernel/ptrace.c
+++ b/arch/arm64/kernel/ptrace.c
@@ -1500,7 +1500,8 @@ static const struct user_regset aarch64_regsets[] = {
#ifdef CONFIG_ARM64_SVE
[REGSET_SVE] = { /* Scalable Vector Extension */
.core_note_type = NT_ARM_SVE,
- .n = DIV_ROUND_UP(SVE_PT_SIZE(SVE_VQ_MAX, SVE_PT_REGS_SVE),
+ .n = DIV_ROUND_UP(SVE_PT_SIZE(ARCH_SVE_VQ_MAX,
+ SVE_PT_REGS_SVE),
SVE_VQ_BYTES),
.size = SVE_VQ_BYTES,
.align = SVE_VQ_BYTES,
diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c
index 0e8beb3349ea..425b1bc17a3f 100644
--- a/arch/arm64/kernel/signal.c
+++ b/arch/arm64/kernel/signal.c
@@ -242,7 +242,7 @@ static int preserve_sve_context(struct sve_context __user *ctx)
vl = task_get_sme_vl(current);
vq = sve_vq_from_vl(vl);
flags |= SVE_SIG_FLAG_SM;
- } else if (test_thread_flag(TIF_SVE)) {
+ } else if (current->thread.fp_type == FP_STATE_SVE) {
vq = sve_vq_from_vl(vl);
}
@@ -878,7 +878,7 @@ static int setup_sigframe_layout(struct rt_sigframe_user_layout *user,
if (system_supports_sve() || system_supports_sme()) {
unsigned int vq = 0;
- if (add_all || test_thread_flag(TIF_SVE) ||
+ if (add_all || current->thread.fp_type == FP_STATE_SVE ||
thread_sm_enabled(&current->thread)) {
int vl = max(sve_max_vl(), sme_max_vl());
diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c
index 7f88028a00c0..684c26511696 100644
--- a/arch/arm64/kernel/stacktrace.c
+++ b/arch/arm64/kernel/stacktrace.c
@@ -7,6 +7,7 @@
#include <linux/kernel.h>
#include <linux/efi.h>
#include <linux/export.h>
+#include <linux/filter.h>
#include <linux/ftrace.h>
#include <linux/kprobes.h>
#include <linux/sched.h>
@@ -247,7 +248,7 @@ struct kunwind_consume_entry_data {
void *cookie;
};
-static bool
+static __always_inline bool
arch_kunwind_consume_entry(const struct kunwind_state *state, void *cookie)
{
struct kunwind_consume_entry_data *data = cookie;
@@ -266,6 +267,31 @@ noinline noinstr void arch_stack_walk(stack_trace_consume_fn consume_entry,
kunwind_stack_walk(arch_kunwind_consume_entry, &data, task, regs);
}
+struct bpf_unwind_consume_entry_data {
+ bool (*consume_entry)(void *cookie, u64 ip, u64 sp, u64 fp);
+ void *cookie;
+};
+
+static bool
+arch_bpf_unwind_consume_entry(const struct kunwind_state *state, void *cookie)
+{
+ struct bpf_unwind_consume_entry_data *data = cookie;
+
+ return data->consume_entry(data->cookie, state->common.pc, 0,
+ state->common.fp);
+}
+
+noinline noinstr void arch_bpf_stack_walk(bool (*consume_entry)(void *cookie, u64 ip, u64 sp,
+ u64 fp), void *cookie)
+{
+ struct bpf_unwind_consume_entry_data data = {
+ .consume_entry = consume_entry,
+ .cookie = cookie,
+ };
+
+ kunwind_stack_walk(arch_bpf_unwind_consume_entry, &data, current, NULL);
+}
+
static bool dump_backtrace_entry(void *arg, unsigned long where)
{
char *loglvl = arg;
diff --git a/arch/arm64/kernel/suspend.c b/arch/arm64/kernel/suspend.c
index eca4d0435211..eaaff94329cd 100644
--- a/arch/arm64/kernel/suspend.c
+++ b/arch/arm64/kernel/suspend.c
@@ -12,6 +12,7 @@
#include <asm/daifflags.h>
#include <asm/debug-monitors.h>
#include <asm/exec.h>
+#include <asm/fpsimd.h>
#include <asm/mte.h>
#include <asm/memory.h>
#include <asm/mmu_context.h>
@@ -80,6 +81,8 @@ void notrace __cpu_suspend_exit(void)
*/
spectre_v4_enable_mitigation(NULL);
+ sme_suspend_exit();
+
/* Restore additional feature-specific configuration */
ptrauth_suspend_exit();
}
diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c
index 5562daf38a22..89b6e7840002 100644
--- a/arch/arm64/kernel/vdso.c
+++ b/arch/arm64/kernel/vdso.c
@@ -69,10 +69,7 @@ static struct vdso_abi_info vdso_info[] __ro_after_init = {
/*
* The vDSO data page.
*/
-static union {
- struct vdso_data data[CS_BASES];
- u8 page[PAGE_SIZE];
-} vdso_data_store __page_aligned_data;
+static union vdso_data_store vdso_data_store __page_aligned_data;
struct vdso_data *vdso_data = vdso_data_store.data;
static int vdso_mremap(const struct vm_special_mapping *sm,
generated by cgit v1.2.3 (git 2.46.0) at 2025-08-23 20:29:21 +0000