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authorVitaly Kuznetsov <vkuznets@redhat.com>2021-09-02 11:35:26 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2021-10-01 19:04:45 +0200
commit70367f091777419f42e5f68f4206deb641335877 (patch)
tree99fc953aad6b0a2f8d998d3f640bcb873ab86f65 /target/i386/cpu.c
parent988f7b8bfeffbf521814d1e48c321f7674277512 (diff)
i386: Support KVM_CAP_HYPERV_ENFORCE_CPUID
By default, KVM allows the guest to use all currently supported Hyper-V enlightenments when Hyper-V CPUID interface was exposed, regardless of if some features were not announced in guest visible CPUIDs. hv-enforce-cpuid feature alters this behavior and only allows the guest to use exposed Hyper-V enlightenments. The feature is supported by Linux >= 5.14 and is not enabled by default in QEMU. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Message-Id: <20210902093530.345756-5-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target/i386/cpu.c')
-rw-r--r--target/i386/cpu.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 598019de12..2a19eba56d 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -6834,6 +6834,7 @@ static Property x86_cpu_properties[] = {
DEFINE_PROP_ON_OFF_AUTO("hv-no-nonarch-coresharing", X86CPU,
hyperv_no_nonarch_cs, ON_OFF_AUTO_OFF),
DEFINE_PROP_BOOL("hv-passthrough", X86CPU, hyperv_passthrough, false),
+ DEFINE_PROP_BOOL("hv-enforce-cpuid", X86CPU, hyperv_enforce_cpuid, false),
DEFINE_PROP_BOOL("check", X86CPU, check_cpuid, true),
DEFINE_PROP_BOOL("enforce", X86CPU, enforce_cpuid, false),