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i386/kvm: add support for Hyper-V reenlightenment MSRs

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KVM recently gained support for Hyper-V Reenlightenment MSRs which are
required to make KVM-on-Hyper-V enable TSC page clocksource to its guests
when INVTSC is not passed to it (and it is not passed by default in Qemu
as it effectively blocks migration).

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20180411115036.31832-2-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov 2018-04-11 13:50:36 +02:00 • committed by Paolo Bonzini
parent 45b47130f4
commit ba6a4fd95d
5 changed files with 77 additions and 3 deletions
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4
target/i386/cpu.c
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@ -416,7 +416,8 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
NULL /* hv_vpindex_access */, NULL /* hv_msr_reset_access */,
NULL /* hv_msr_stats_access */, NULL /* hv_reftsc_access */,
NULL /* hv_msr_idle_access */, NULL /* hv_msr_frequency_access */,
NULL, NULL, NULL, NULL,
NULL /* hv_msr_debug_access */, NULL /* hv_msr_reenlightenment_access */,
NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
@ -4770,6 +4771,7 @@ static Property x86_cpu_properties[] = {
DEFINE_PROP_BOOL("hv-synic", X86CPU, hyperv_synic, false),
DEFINE_PROP_BOOL("hv-stimer", X86CPU, hyperv_stimer, false),
DEFINE_PROP_BOOL("hv-frequencies", X86CPU, hyperv_frequencies, false),
DEFINE_PROP_BOOL("hv-reenlightenment", X86CPU, hyperv_reenlightenment, false),
DEFINE_PROP_BOOL("check", X86CPU, check_cpuid, true),
DEFINE_PROP_BOOL("enforce", X86CPU, enforce_cpuid, false),
DEFINE_PROP_BOOL("kvm", X86CPU, expose_kvm, true),