diff options
Diffstat (limited to 'arch/arm64/include/asm/processor.h')
| -rw-r--r-- | arch/arm64/include/asm/processor.h | 42 |
1 files changed, 38 insertions, 4 deletions
diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index 3e2091708b8e..f1a7ab18faf3 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -19,10 +19,16 @@ #ifndef __ASM_PROCESSOR_H #define __ASM_PROCESSOR_H -#define TASK_SIZE_64 (UL(1) << VA_BITS) +#define KERNEL_DS UL(-1) +#define USER_DS ((UL(1) << MAX_USER_VA_BITS) - 1) -#define KERNEL_DS UL(-1) -#define USER_DS (TASK_SIZE_64 - 1) +/* + * On arm64 systems, unaligned accesses by the CPU are cheap, and so there is + * no point in shifting all network buffers by 2 bytes just to make some IP + * header fields appear aligned in memory, potentially sacrificing some DMA + * performance on some platforms. + */ +#define NET_IP_ALIGN 0 #ifndef __ASSEMBLY__ #ifdef __KERNEL__ @@ -38,6 +44,7 @@ #include <asm/hw_breakpoint.h> #include <asm/lse.h> #include <asm/pgtable-hwdef.h> +#include <asm/pointer_auth.h> #include <asm/ptrace.h> #include <asm/types.h> @@ -45,19 +52,31 @@ * TASK_SIZE - the maximum size of a user space task. * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area. */ + +#define DEFAULT_MAP_WINDOW_64 (UL(1) << VA_BITS) +#define TASK_SIZE_64 (UL(1) << vabits_user) + #ifdef CONFIG_COMPAT #define TASK_SIZE_32 UL(0x100000000) #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) ? \ TASK_SIZE_32 : TASK_SIZE_64) +#define DEFAULT_MAP_WINDOW (test_thread_flag(TIF_32BIT) ? \ + TASK_SIZE_32 : DEFAULT_MAP_WINDOW_64) #else #define TASK_SIZE TASK_SIZE_64 +#define DEFAULT_MAP_WINDOW DEFAULT_MAP_WINDOW_64 #endif /* CONFIG_COMPAT */ +#ifdef CONFIG_ARM64_FORCE_52BIT +#define STACK_TOP_MAX TASK_SIZE_64 #define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 4)) +#else +#define STACK_TOP_MAX DEFAULT_MAP_WINDOW_64 +#define TASK_UNMAPPED_BASE (PAGE_ALIGN(DEFAULT_MAP_WINDOW / 4)) +#endif /* CONFIG_ARM64_FORCE_52BIT */ -#define STACK_TOP_MAX TASK_SIZE_64 #ifdef CONFIG_COMPAT #define AARCH32_VECTORS_BASE 0xffff0000 #define STACK_TOP (test_thread_flag(TIF_32BIT) ? \ @@ -66,6 +85,15 @@ #define STACK_TOP STACK_TOP_MAX #endif /* CONFIG_COMPAT */ +#ifndef CONFIG_ARM64_FORCE_52BIT +#define arch_get_mmap_end(addr) ((addr > DEFAULT_MAP_WINDOW) ? TASK_SIZE :\ + DEFAULT_MAP_WINDOW) + +#define arch_get_mmap_base(addr, base) ((addr > DEFAULT_MAP_WINDOW) ? \ + base + TASK_SIZE - DEFAULT_MAP_WINDOW :\ + base) +#endif /* CONFIG_ARM64_FORCE_52BIT */ + extern phys_addr_t arm64_dma_phys_limit; #define ARCH_LOW_ADDRESS_LIMIT (arm64_dma_phys_limit - 1) @@ -119,6 +147,9 @@ struct thread_struct { unsigned long fault_address; /* fault info */ unsigned long fault_code; /* ESR_EL1 value */ struct debug_info debug; /* debugging */ +#ifdef CONFIG_ARM64_PTR_AUTH + struct ptrauth_keys keys_user; +#endif }; static inline void arch_thread_struct_whitelist(unsigned long *offset, @@ -262,6 +293,9 @@ extern void __init minsigstksz_setup(void); #define SVE_SET_VL(arg) sve_set_current_vl(arg) #define SVE_GET_VL() sve_get_current_vl() +/* PR_PAC_RESET_KEYS prctl */ +#define PAC_RESET_KEYS(tsk, arg) ptrauth_prctl_reset_keys(tsk, arg) + /* * For CONFIG_GCC_PLUGIN_STACKLEAK * |