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[RFCv2,01/10] x86/mm: Fix CR3_ADDR_MASK

Message ID 20220511022751.65540-3-kirill.shutemov@linux.intel.com (mailing list archive)
State New
Headers show
Series Linear Address Masking enabling | expand

Commit Message

Kirill A. Shutemov May 11, 2022, 2:27 a.m. UTC 
The mask must not include bits above physical address mask. These bits
are reserved and can be used for other things. Bits 61 and 62 are used
for Linear Address Masking.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
 arch/x86/include/asm/processor-flags.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/arch/x86/include/asm/processor-flags.h b/arch/x86/include/asm/processor-flags.h
index 02c2cbda4a74..a7f3d9100adb 100644
--- a/arch/x86/include/asm/processor-flags.h
+++ b/arch/x86/include/asm/processor-flags.h
@@ -35,7 +35,7 @@ 
  */
 #ifdef CONFIG_X86_64
 /* Mask off the address space ID and SME encryption bits. */
-#define CR3_ADDR_MASK	__sme_clr(0x7FFFFFFFFFFFF000ull)
+#define CR3_ADDR_MASK	__sme_clr(PHYSICAL_PAGE_MASK)
 #define CR3_PCID_MASK	0xFFFull
 #define CR3_NOFLUSH	BIT_ULL(63)