Messages in this thread Patch in this message | | | From | Alexandre Chartre <> | Subject | [PATCH] KVM: x86: Set BHI_NO in guest when host is not affected by BHI | Date | Thu, 11 Apr 2024 09:24:45 +0200 |
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When a system is not affected by the BHI bug then KVM should configure guests with BHI_NO to ensure they won't enable any BHI mitigation.
Signed-off-by: Alexandre Chartre <alexandre.chartre@oracle.com> --- arch/x86/kvm/x86.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 984ea2089efc..f43d3c15a6b7 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1678,6 +1678,9 @@ static u64 kvm_get_arch_capabilities(void) if (!boot_cpu_has_bug(X86_BUG_GDS) || gds_ucode_mitigated()) data |= ARCH_CAP_GDS_NO; + if (!boot_cpu_has_bug(X86_BUG_BHI)) + data |= ARCH_CAP_BHI_NO; + return data; } -- 2.39.3
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