The following commit has been merged into the x86/pasid branch of tip: Commit-ID: f0f2f9feb4ee6f28729e5388da3c03ce1dac077a Gitweb: https://git.kernel.org/tip/f0f2f9feb4ee6f28729e5388da3c03ce1dac077a Author: Fenghua Yu <fenghua.yu@xxxxxxxxx> AuthorDate: Tue, 15 Sep 2020 09:30:10 -07:00 Committer: Borislav Petkov <bp@xxxxxxx> CommitterDate: Thu, 17 Sep 2020 20:22:15 +02:00 x86/msr-index: Define an IA32_PASID MSR The IA32_PASID MSR (0xd93) contains the Process Address Space Identifier (PASID), a 20-bit value. Bit 31 must be set to indicate the value programmed in the MSR is valid. Hardware uses the PASID to identify a process address space and direct responses to the right address space. Signed-off-by: Fenghua Yu <fenghua.yu@xxxxxxxxx> Signed-off-by: Borislav Petkov <bp@xxxxxxx> Reviewed-by: Tony Luck <tony.luck@xxxxxxxxx> Link: https://lkml.kernel.org/r/1600187413-163670-7-git-send-email-fenghua.yu@xxxxxxxxx --- arch/x86/include/asm/msr-index.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h index 2859ee4..aaddc6a 100644 --- a/arch/x86/include/asm/msr-index.h +++ b/arch/x86/include/asm/msr-index.h @@ -257,6 +257,9 @@ #define MSR_IA32_LASTINTFROMIP 0x000001dd #define MSR_IA32_LASTINTTOIP 0x000001de +#define MSR_IA32_PASID 0x00000d93 +#define MSR_IA32_PASID_VALID BIT_ULL(31) + /* DEBUGCTLMSR bits (others vary by model): */ #define DEBUGCTLMSR_LBR (1UL << 0) /* last branch recording */ #define DEBUGCTLMSR_BTF_SHIFT 1
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