From: Roger Pau Monné Date: Wed, 18 May 2022 09:21:49 +0000 (+0200) Subject: x86/cpuid: expose MCDT_NO to guests X-Git-Tag: archive/raspbian/4.17.0-1+rpi1^2~33^2~643 X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=ae49ee66cfda4ab6b8ef85cae5d59f8f020615c0;p=xen.git x86/cpuid: expose MCDT_NO to guests Expose the MCDT_NO CPUID flag to guests if available. The bit signals that the CPU does not exhibit MCDT behavior, and as such can be exposed without requiring any additional work. Signed-off-by: Roger Pau Monné Reviewed-by: Andrew Cooper --- diff --git a/tools/libs/light/libxl_cpuid.c b/tools/libs/light/libxl_cpuid.c index d462f9e421..67ba72dd84 100644 --- a/tools/libs/light/libxl_cpuid.c +++ b/tools/libs/light/libxl_cpuid.c @@ -235,6 +235,7 @@ int libxl_cpuid_parse_config(libxl_cpuid_policy_list *cpuid, const char* str) {"fsrcs", 0x00000007, 1, CPUID_REG_EAX, 12, 1}, {"intel-psfd", 0x00000007, 2, CPUID_REG_EDX, 0, 1}, + {"mcdt-no", 0x00000007, 2, CPUID_REG_EDX, 5, 1}, {"lahfsahf", 0x80000001, NA, CPUID_REG_ECX, 0, 1}, {"cmplegacy", 0x80000001, NA, CPUID_REG_ECX, 1, 1}, diff --git a/tools/misc/xen-cpuid.c b/tools/misc/xen-cpuid.c index 0b1b3333fe..a9e0fb5d17 100644 --- a/tools/misc/xen-cpuid.c +++ b/tools/misc/xen-cpuid.c @@ -203,6 +203,8 @@ static const char *const str_7b1[32] = static const char *const str_7d2[32] = { [ 0] = "intel-psfd", + + /* 4 */ [ 5] = "mcdt-no", }; static const struct { diff --git a/xen/include/public/arch-x86/cpufeatureset.h b/xen/include/public/arch-x86/cpufeatureset.h index 9cee4b439e..0c27f5bbaf 100644 --- a/xen/include/public/arch-x86/cpufeatureset.h +++ b/xen/include/public/arch-x86/cpufeatureset.h @@ -304,6 +304,7 @@ XEN_CPUFEATURE(INTEL_PPIN, 12*32+ 0) /* Protected Processor Inventory /* Intel-defined CPU features, CPUID level 0x00000007:2.edx, word 13 */ XEN_CPUFEATURE(INTEL_PSFD, 13*32+ 0) /*A MSR_SPEC_CTRL.PSFD */ +XEN_CPUFEATURE(MCDT_NO, 13*32+ 5) /*A MCDT_NO */ #endif /* XEN_CPUFEATURE */