Messages in this thread Patch in this message | | | Date | Mon, 20 Jul 2015 08:46:14 +0100 | From | "Jan Beulich" <> | Subject | [PATCH] x86: adjust default caching mode translation tables |
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Make WT really mean WT (rather than UC).
I can't see why commit 9cd25aac1f ("x86/mm/pat: Emulate PAT when it is disabled") didn't make this match its changes to pat_init().
Signed-off-by: Jan Beulich <jbeulich@suse.com> Cc: Borislav Petkov <bp@suse.de> Cc: Toshi Kani <toshi.kani@hp.com> --- arch/x86/mm/init.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
--- 4.2-rc3/arch/x86/mm/init.c +++ 4.2-rc3-x86-default-cache-mode/arch/x86/mm/init.c @@ -43,18 +43,18 @@ uint16_t __cachemode2pte_tbl[_PAGE_CACHE [_PAGE_CACHE_MODE_WC ] = 0 | _PAGE_PCD, [_PAGE_CACHE_MODE_UC_MINUS] = 0 | _PAGE_PCD, [_PAGE_CACHE_MODE_UC ] = _PAGE_PWT | _PAGE_PCD, - [_PAGE_CACHE_MODE_WT ] = 0 | _PAGE_PCD, + [_PAGE_CACHE_MODE_WT ] = _PAGE_PWT | 0, [_PAGE_CACHE_MODE_WP ] = 0 | _PAGE_PCD, }; EXPORT_SYMBOL(__cachemode2pte_tbl); uint8_t __pte2cachemode_tbl[8] = { [__pte2cm_idx( 0 | 0 | 0 )] = _PAGE_CACHE_MODE_WB, - [__pte2cm_idx(_PAGE_PWT | 0 | 0 )] = _PAGE_CACHE_MODE_UC_MINUS, + [__pte2cm_idx(_PAGE_PWT | 0 | 0 )] = _PAGE_CACHE_MODE_WT, [__pte2cm_idx( 0 | _PAGE_PCD | 0 )] = _PAGE_CACHE_MODE_UC_MINUS, [__pte2cm_idx(_PAGE_PWT | _PAGE_PCD | 0 )] = _PAGE_CACHE_MODE_UC, [__pte2cm_idx( 0 | 0 | _PAGE_PAT)] = _PAGE_CACHE_MODE_WB, - [__pte2cm_idx(_PAGE_PWT | 0 | _PAGE_PAT)] = _PAGE_CACHE_MODE_UC_MINUS, + [__pte2cm_idx(_PAGE_PWT | 0 | _PAGE_PAT)] = _PAGE_CACHE_MODE_WT, [__pte2cm_idx(0 | _PAGE_PCD | _PAGE_PAT)] = _PAGE_CACHE_MODE_UC_MINUS, [__pte2cm_idx(_PAGE_PWT | _PAGE_PCD | _PAGE_PAT)] = _PAGE_CACHE_MODE_UC, };
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