diff options
Diffstat (limited to 'arch/x86/include/asm/pgtable_64.h')
| -rw-r--r-- | arch/x86/include/asm/pgtable_64.h | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h index 1cc82ece9ac1..ce97c8c6a310 100644 --- a/arch/x86/include/asm/pgtable_64.h +++ b/arch/x86/include/asm/pgtable_64.h @@ -106,9 +106,32 @@ static inline void native_pud_clear(pud_t *pud) native_set_pud(pud, native_make_pud(0)); } +#ifdef CONFIG_PAGE_TABLE_ISOLATION +extern pgd_t kaiser_set_shadow_pgd(pgd_t *pgdp, pgd_t pgd); + +static inline pgd_t *native_get_shadow_pgd(pgd_t *pgdp) +{ +#ifdef CONFIG_DEBUG_VM + /* linux/mmdebug.h may not have been included at this point */ + BUG_ON(!kaiser_enabled); +#endif + return (pgd_t *)((unsigned long)pgdp | (unsigned long)PAGE_SIZE); +} +#else +static inline pgd_t kaiser_set_shadow_pgd(pgd_t *pgdp, pgd_t pgd) +{ + return pgd; +} +static inline pgd_t *native_get_shadow_pgd(pgd_t *pgdp) +{ + BUILD_BUG_ON(1); + return NULL; +} +#endif /* CONFIG_PAGE_TABLE_ISOLATION */ + static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd) { - *pgdp = pgd; + *pgdp = kaiser_set_shadow_pgd(pgdp, pgd); } static inline void native_pgd_clear(pgd_t *pgd) |