diff options
Diffstat (limited to 'arch/arm64/include/asm/processor.h')
| -rw-r--r-- | arch/arm64/include/asm/processor.h | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index fda6f5812281..9eb95ab19924 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -37,6 +37,7 @@ #include <linux/string.h> #include <asm/alternative.h> +#include <asm/cpufeature.h> #include <asm/fpsimd.h> #include <asm/hw_breakpoint.h> #include <asm/lse.h> @@ -49,7 +50,15 @@ * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area. */ #ifdef CONFIG_COMPAT +#ifdef CONFIG_ARM64_64K_PAGES +/* + * With CONFIG_ARM64_64K_PAGES enabled, the last page is occupied + * by the compat vectors page. + */ #define TASK_SIZE_32 UL(0x100000000) +#else +#define TASK_SIZE_32 (UL(0x100000000) - PAGE_SIZE) +#endif /* CONFIG_ARM64_64K_PAGES */ #define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \ TASK_SIZE_32 : TASK_SIZE_64) #define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_32BIT) ? \ @@ -139,11 +148,25 @@ static inline void start_thread_common(struct pt_regs *regs, unsigned long pc) regs->pc = pc; } +static inline void set_ssbs_bit(struct pt_regs *regs) +{ + regs->pstate |= PSR_SSBS_BIT; +} + +static inline void set_compat_ssbs_bit(struct pt_regs *regs) +{ + regs->pstate |= PSR_AA32_SSBS_BIT; +} + static inline void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp) { start_thread_common(regs, pc); regs->pstate = PSR_MODE_EL0t; + + if (arm64_get_ssbd_state() != ARM64_SSBD_FORCE_ENABLE) + set_ssbs_bit(regs); + regs->sp = sp; } @@ -160,6 +183,9 @@ static inline void compat_start_thread(struct pt_regs *regs, unsigned long pc, regs->pstate |= COMPAT_PSR_E_BIT; #endif + if (arm64_get_ssbd_state() != ARM64_SSBD_FORCE_ENABLE) + set_compat_ssbs_bit(regs); + regs->compat_sp = sp; } #endif @@ -214,8 +240,8 @@ static inline void spin_lock_prefetch(const void *ptr) #endif -int cpu_enable_pan(void *__unused); -int cpu_enable_cache_maint_trap(void *__unused); +void cpu_enable_pan(const struct arm64_cpu_capabilities *__unused); +void cpu_enable_cache_maint_trap(const struct arm64_cpu_capabilities *__unused); #endif /* __ASSEMBLY__ */ #endif /* __ASM_PROCESSOR_H */ |