diff options
Diffstat (limited to 'arch/arm64/include/asm/pgtable-prot.h')
| -rw-r--r-- | arch/arm64/include/asm/pgtable-prot.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgtable-prot.h b/arch/arm64/include/asm/pgtable-prot.h index 1305e28225fc..2e7e0f452301 100644 --- a/arch/arm64/include/asm/pgtable-prot.h +++ b/arch/arm64/include/asm/pgtable-prot.h @@ -21,6 +21,7 @@ #ifndef __ASSEMBLY__ +#include <asm/cpufeature.h> #include <asm/pgtable-types.h> extern bool arm64_use_ng_mappings; @@ -31,6 +32,16 @@ extern bool arm64_use_ng_mappings; #define PTE_MAYBE_NG (arm64_use_ng_mappings ? PTE_NG : 0) #define PMD_MAYBE_NG (arm64_use_ng_mappings ? PMD_SECT_NG : 0) +/* + * If we have userspace only BTI we don't want to mark kernel pages + * guarded even if the system does support BTI. + */ +#ifdef CONFIG_ARM64_BTI_KERNEL +#define PTE_MAYBE_GP (system_supports_bti() ? PTE_GP : 0) +#else +#define PTE_MAYBE_GP 0 +#endif + #define PROT_DEFAULT (_PROT_DEFAULT | PTE_MAYBE_NG) #define PROT_SECT_DEFAULT (_PROT_SECT_DEFAULT | PMD_MAYBE_NG) |