diff options
| author | Takashi Iwai <tiwai@suse.de> | 2025-05-16 09:58:27 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2025-05-16 09:58:35 +0200 |
| commit | a3d14d1602ca11429d242d230c31af8f822f614f (patch) | |
| tree | cb15a4235841e657753505538e6715711e7cd151 /arch/x86/include/asm/pgalloc.h | |
| parent | 1c116e5569ef3bd33be1d6f687b0270c0932838d (diff) | |
| parent | 7b9938a14460e8ec7649ca2e80ac0aae9815bf02 (diff) | |
Merge branch 'for-linus' into for-next
Back-merge of 6.15 devel branch for further development of HD-audio
stuff.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'arch/x86/include/asm/pgalloc.h')
| -rw-r--r-- | arch/x86/include/asm/pgalloc.h | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/arch/x86/include/asm/pgalloc.h b/arch/x86/include/asm/pgalloc.h index a33147520044..c88691b15f3c 100644 --- a/arch/x86/include/asm/pgalloc.h +++ b/arch/x86/include/asm/pgalloc.h @@ -6,6 +6,8 @@ #include <linux/mm.h> /* for struct page */ #include <linux/pagemap.h> +#include <asm/cpufeature.h> + #define __HAVE_ARCH_PTE_ALLOC_ONE #define __HAVE_ARCH_PGD_FREE #include <asm-generic/pgalloc.h> @@ -29,16 +31,17 @@ static inline void paravirt_release_pud(unsigned long pfn) {} static inline void paravirt_release_p4d(unsigned long pfn) {} #endif -#ifdef CONFIG_MITIGATION_PAGE_TABLE_ISOLATION /* - * Instead of one PGD, we acquire two PGDs. Being order-1, it is - * both 8k in size and 8k-aligned. That lets us just flip bit 12 - * in a pointer to swap between the two 4k halves. + * In case of Page Table Isolation active, we acquire two PGDs instead of one. + * Being order-1, it is both 8k in size and 8k-aligned. That lets us just + * flip bit 12 in a pointer to swap between the two 4k halves. */ -#define PGD_ALLOCATION_ORDER 1 -#else -#define PGD_ALLOCATION_ORDER 0 -#endif +static inline unsigned int pgd_allocation_order(void) +{ + if (cpu_feature_enabled(X86_FEATURE_PTI)) + return 1; + return 0; +} /* * Allocate and free page tables. |