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x86/msr-index: Define an IA32_PASID MSR

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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@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/1600187413-163670-7-git-send-email-fenghua.yu@intel.com
This commit is contained in:
Fenghua Yu 2020-09-15 09:30:10 -07:00 • committed by Borislav Petkov
parent b454feb9ab
commit f0f2f9feb4
1 changed files with 3 additions and 0 deletions
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3
arch/x86/include/asm/msr-index.h
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@ -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