From: Xiaoyao Li <xiaoyao.li@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <sean.j.christopherson@intel.com>,
kvm@vger.kernel.org
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>,
Jim Mattson <jmattson@google.com>,
linux-kernel@vger.kernel.org, Xiaoyao Li <xiaoyao.li@intel.com>
Subject: [PATCH 2/6] KVM: X86: Go on updating other CPUID leaves when leaf 1 is absent
Date: Fri, 29 May 2020 16:55:41 +0800 [thread overview]
Message-ID: <20200529085545.29242-3-xiaoyao.li@intel.com> (raw)
In-Reply-To: <20200529085545.29242-1-xiaoyao.li@intel.com>
As handling of bits other leaf 1 added over time, kvm_update_cpuid()
should not return directly if leaf 1 is absent, but should go on
updateing other CPUID leaves.
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
---
arch/x86/kvm/cpuid.c | 23 +++++++++++------------
1 file changed, 11 insertions(+), 12 deletions(-)
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 2f1a9650b7f2..795bbaf37110 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -60,22 +60,21 @@ int kvm_update_cpuid(struct kvm_vcpu *vcpu)
struct kvm_lapic *apic = vcpu->arch.apic;
best = kvm_find_cpuid_entry(vcpu, 1, 0);
- if (!best)
- return 0;
-
- /* Update OSXSAVE bit */
- if (boot_cpu_has(X86_FEATURE_XSAVE) && best->function == 0x1)
- cpuid_entry_change(best, X86_FEATURE_OSXSAVE,
+ if (best) {
+ /* Update OSXSAVE bit */
+ if (boot_cpu_has(X86_FEATURE_XSAVE))
+ cpuid_entry_change(best, X86_FEATURE_OSXSAVE,
kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE));
- cpuid_entry_change(best, X86_FEATURE_APIC,
+ cpuid_entry_change(best, X86_FEATURE_APIC,
vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE);
- if (apic) {
- if (cpuid_entry_has(best, X86_FEATURE_TSC_DEADLINE_TIMER))
- apic->lapic_timer.timer_mode_mask = 3 << 17;
- else
- apic->lapic_timer.timer_mode_mask = 1 << 17;
+ if (apic) {
+ if (cpuid_entry_has(best, X86_FEATURE_TSC_DEADLINE_TIMER))
+ apic->lapic_timer.timer_mode_mask = 3 << 17;
+ else
+ apic->lapic_timer.timer_mode_mask = 1 << 17;
+ }
}
best = kvm_find_cpuid_entry(vcpu, 7, 0);
--
2.18.2
next prev parent reply other threads:[~2020-05-29 8:55 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-29 8:55 [PATCH 0/6] Refactor handling flow of SET_CPUID* Xiaoyao Li
2020-05-29 8:55 ` [PATCH 1/6] KVM: X86: Reset vcpu->arch.cpuid_nent to 0 if SET_CPUID fails Xiaoyao Li
2020-05-29 8:55 ` Xiaoyao Li [this message]
2020-05-29 8:55 ` [PATCH 3/6] KVM: X86: Introduce kvm_check_cpuid() Xiaoyao Li
2020-05-29 8:55 ` [PATCH 4/6] KVM: X86: Split kvm_update_cpuid() Xiaoyao Li
2020-06-03 1:10 ` Sean Christopherson
2020-06-03 7:44 ` Xiaoyao Li
2020-05-29 8:55 ` [PATCH 5/6] KVM: X86: Move kvm_x86_ops.cpuid_update() into kvm_update_state_based_on_cpuid() Xiaoyao Li
2020-05-29 8:55 ` [PATCH 6/6] KVM: X86: Move kvm_apic_set_version() to kvm_update_state_based_on_cpuid() Xiaoyao Li
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