[PATCH] KVM: x86: Set BHI_NO in guest when host is not affected by BHI

[Alexandre Chartre]

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@xxxxxxxxxx>
---
 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