diff options
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/cpufeature.c | 13 | ||||
| -rw-r--r-- | arch/arm64/kernel/cpuinfo.c | 2 | ||||
| -rw-r--r-- | arch/arm64/kernel/process.c | 4 |
3 files changed, 19 insertions, 0 deletions
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index c82ebd8f0087..f15000872e08 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1191,6 +1191,12 @@ static void cpu_clear_disr(const struct arm64_cpu_capabilities *__unused) #endif /* CONFIG_ARM64_RAS_EXTN */ #ifdef CONFIG_ARM64_PTR_AUTH +static void cpu_enable_address_auth(struct arm64_cpu_capabilities const *cap) +{ + sysreg_clear_set(sctlr_el1, 0, SCTLR_ELx_ENIA | SCTLR_ELx_ENIB | + SCTLR_ELx_ENDA | SCTLR_ELx_ENDB); +} + static bool has_address_auth(const struct arm64_cpu_capabilities *entry, int __unused) { @@ -1478,6 +1484,7 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .capability = ARM64_HAS_ADDRESS_AUTH, .type = ARM64_CPUCAP_SYSTEM_FEATURE, .matches = has_address_auth, + .cpu_enable = cpu_enable_address_auth, }, { .desc = "Generic authentication (architected algorithm)", @@ -1552,6 +1559,12 @@ static const struct arm64_cpu_capabilities arm64_elf_hwcaps[] = { HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_SVE_SHIFT, FTR_UNSIGNED, ID_AA64PFR0_SVE, CAP_HWCAP, HWCAP_SVE), #endif HWCAP_CAP(SYS_ID_AA64PFR1_EL1, ID_AA64PFR1_SSBS_SHIFT, FTR_UNSIGNED, ID_AA64PFR1_SSBS_PSTATE_INSNS, CAP_HWCAP, HWCAP_SSBS), +#ifdef CONFIG_ARM64_PTR_AUTH + { .desc = "HWCAP_PACA", .type = ARM64_CPUCAP_SYSTEM_FEATURE, .matches = has_address_auth, + .hwcap_type = CAP_HWCAP, .hwcap = HWCAP_PACA }, + { .desc = "HWCAP_PACG", .type = ARM64_CPUCAP_SYSTEM_FEATURE, .matches = has_generic_auth, + .hwcap_type = CAP_HWCAP, .hwcap = HWCAP_PACG }, +#endif {}, }; diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c index 7cb0b08ab0a7..ca0685f33900 100644 --- a/arch/arm64/kernel/cpuinfo.c +++ b/arch/arm64/kernel/cpuinfo.c @@ -83,6 +83,8 @@ static const char *const hwcap_str[] = { "flagm", "ssbs", "sb", + "paca", + "pacg", NULL }; diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 8a2d68f04e0d..e0a443730e04 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -57,6 +57,7 @@ #include <asm/fpsimd.h> #include <asm/mmu_context.h> #include <asm/processor.h> +#include <asm/pointer_auth.h> #include <asm/stacktrace.h> #if defined(CONFIG_STACKPROTECTOR) && !defined(CONFIG_STACKPROTECTOR_PER_TASK) @@ -429,6 +430,7 @@ __notrace_funcgraph struct task_struct *__switch_to(struct task_struct *prev, contextidr_thread_switch(next); entry_task_switch(next); uao_thread_switch(next); + ptrauth_thread_switch(next); /* * Complete any pending TLB or cache maintenance on this CPU in case @@ -496,4 +498,6 @@ unsigned long arch_randomize_brk(struct mm_struct *mm) void arch_setup_new_exec(void) { current->mm->context.flags = is_compat_task() ? MMCF_AARCH32 : 0; + + ptrauth_thread_init_user(current); } |