diff options
| author | David S. Miller <[email protected]> | 2018-01-09 10:37:00 -0500 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2018-01-09 10:37:00 -0500 |
| commit | a0ce093180f2bbb832b3f5583adc640ad67ea568 (patch) | |
| tree | 62c9aca5be3566ea4810e4584a02870de8b953f8 /arch/x86/include/asm/pgalloc.h | |
| parent | f4803f1b73f877a571be4c8e531dfcf190acc691 (diff) | |
| parent | ef7f8cec80a0ba7bd00ece46844c8994117dc910 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'arch/x86/include/asm/pgalloc.h')
| -rw-r--r-- | arch/x86/include/asm/pgalloc.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pgalloc.h b/arch/x86/include/asm/pgalloc.h index 4b5e1eafada7..aff42e1da6ee 100644 --- a/arch/x86/include/asm/pgalloc.h +++ b/arch/x86/include/asm/pgalloc.h @@ -30,6 +30,17 @@ static inline void paravirt_release_p4d(unsigned long pfn) {} */ extern gfp_t __userpte_alloc_gfp; +#ifdef CONFIG_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. + */ +#define PGD_ALLOCATION_ORDER 1 +#else +#define PGD_ALLOCATION_ORDER 0 +#endif + /* * Allocate and free page tables. */ |