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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-02 16:46:35 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-02 16:46:35 +0300 |
| commit | b6a09416e83ffe4eccfb4ef1b91b3b66483fa810 (patch) | |
| tree | b30f266e85047244dcdb47d5afc134e76aec530d /arch/x86/include/asm/pgalloc.h | |
| parent | db809859c8cee415293b830e67178f526d1eb2be (diff) | |
| parent | 30a7acd573899fd8b8ac39236eff6468b195ac7d (diff) | |
| download | linux-b6a09416e83ffe4eccfb4ef1b91b3b66483fa810.tar.xz | |
Merge 4.15-rc6 into char-misc-next
We want the fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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. */ |