Re: [PATCHv3 1/8] x86/mm: Fix CR3_ADDR_MASK

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On Fri, 2022-06-10 at 17:35 +0300, Kirill A. Shutemov wrote:
> 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@xxxxxxxxxxxxxxx>
> ---
>  arch/x86/include/asm/processor-flags.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> 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)
>  

Reviewed-by: Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx>




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