# Commit 15b7611efd497c4b65f350483857082cb70fc348 # Date 2022-02-01 13:20:44 +0000 # Author Andrew Cooper # Committer Andrew Cooper x86/cpuid: Advertise SSB_NO to guests by default This is a statement of hardware behaviour, and not related to controls for the guest kernel to use. Pass it straight through from hardware. Signed-off-by: Andrew Cooper Reviewed-by: Jan Beulich --- a/xen/include/public/arch-x86/cpufeatureset.h +++ b/xen/include/public/arch-x86/cpufeatureset.h @@ -247,7 +247,7 @@ XEN_CPUFEATURE(IBRS_FAST, 8*32+18) / XEN_CPUFEATURE(IBRS_SAME_MODE, 8*32+19) /* IBRS provides same-mode protection */ XEN_CPUFEATURE(AMD_SSBD, 8*32+24) /* MSR_SPEC_CTRL.SSBD available */ XEN_CPUFEATURE(VIRT_SSBD, 8*32+25) /* MSR_VIRT_SPEC_CTRL.SSBD */ -XEN_CPUFEATURE(SSB_NO, 8*32+26) /* Hardware not vulnerable to SSB */ +XEN_CPUFEATURE(SSB_NO, 8*32+26) /*A Hardware not vulnerable to SSB */ XEN_CPUFEATURE(PSFD, 8*32+28) /* MSR_SPEC_CTRL.PSFD */ /* Intel-defined CPU features, CPUID level 0x00000007:0.edx, word 9 */