diff options
| author | Andi Kleen <ak@linux.intel.com> | 2018-08-08 01:09:36 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-08-08 10:23:43 +0300 |
| commit | f22cc87f6c1f771b57c407555cfefd811cdd9507 (patch) | |
| tree | d48bf57d7816867286ff780f2f5d78ef00472fe3 /arch/x86/include | |
| parent | bc2d8d262cba5736332cbc866acb11b1c5748aa9 (diff) | |
| download | linux-f22cc87f6c1f771b57c407555cfefd811cdd9507.tar.xz | |
x86/speculation/l1tf: Invert all not present mappings
For kernel mappings PAGE_PROTNONE is not necessarily set for a non present
mapping, but the inversion logic explicitely checks for !PRESENT and
PROT_NONE.
Remove the PROT_NONE check and make the inversion unconditional for all not
present mappings.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/pgtable-invert.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/pgtable-invert.h b/arch/x86/include/asm/pgtable-invert.h index 177564187fc0..44b1203ece12 100644 --- a/arch/x86/include/asm/pgtable-invert.h +++ b/arch/x86/include/asm/pgtable-invert.h @@ -6,7 +6,7 @@ static inline bool __pte_needs_invert(u64 val) { - return (val & (_PAGE_PRESENT|_PAGE_PROTNONE)) == _PAGE_PROTNONE; + return !(val & _PAGE_PRESENT); } /* Get a mask to xor with the page table entry to get the correct pfn. */ |