diff options
| author | Fenghua Yu <[email protected]> | 2020-09-15 09:30:10 -0700 |
|---|---|---|
| committer | Borislav Petkov <[email protected]> | 2020-09-17 20:22:15 +0200 |
| commit | f0f2f9feb4ee6f28729e5388da3c03ce1dac077a (patch) | |
| tree | a0a960cba7a6a80a682a4b8f99a9ff0313834f5b | |
| parent | b454feb9abc1a9ee876fb84bfea0fc8d726f5bc4 (diff) | |
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 <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Reviewed-by: Tony Luck <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
| -rw-r--r-- | arch/x86/include/asm/msr-index.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h index 2859ee4f39a8..aaddc6a9e237 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 |