diff options
| author | Andi Kleen <ak@linux.intel.com> | 2018-08-07 15:09:36 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-15 17:37:33 +0200 |
| commit | 330e5973bb501a6ac1a4e52aa14423876e145bfc (patch) | |
| tree | 4d53c573148b0b99bf2e4e6167fc6f92b3acecdf | |
| parent | 4d3579f7f904cddf55264c427b746e1ac1a83d7c (diff) | |
| download | linux-330e5973bb501a6ac1a4e52aa14423876e145bfc.tar.gz | |
x86/speculation/l1tf: Invert all not present mappings
commit f22cc87f6c1f771b57c407555cfefd811cdd9507 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 177564187fc06..44b1203ece12a 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. */ |