From: Xiaoyao Li <xiaoyao.li@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <sean.j.christopherson@intel.com>,
Jim Mattson <jmattson@google.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-doc@vger.kernel.org, Jonathan Corbet <corbet@lwn.net>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Joerg Roedel <joro@8bytes.org>, Xiaoyao Li <xiaoyao.li@intel.com>
Subject: [PATCH v3 4/8] KVM: X86: Split kvm_update_cpuid()
Date: Wed, 8 Jul 2020 14:50:50 +0800 [thread overview]
Message-ID: <20200708065054.19713-5-xiaoyao.li@intel.com> (raw)
In-Reply-To: <20200708065054.19713-1-xiaoyao.li@intel.com>
Split the part of updating vcpu model out of kvm_update_cpuid(), and put
it into a new kvm_update_vcpu_model(). So it's more clear that
kvm_update_cpuid() is to update guest CPUID settings, while
kvm_update_vcpu_model() is to update vcpu model (settings) based on the
updated CPUID settings.
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
---
arch/x86/kvm/cpuid.c | 38 ++++++++++++++++++++++++--------------
arch/x86/kvm/cpuid.h | 1 +
arch/x86/kvm/x86.c | 1 +
3 files changed, 26 insertions(+), 14 deletions(-)
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index a825878b7f84..001f5a94880e 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -76,7 +76,6 @@ static int kvm_check_cpuid(struct kvm_vcpu *vcpu)
void kvm_update_cpuid(struct kvm_vcpu *vcpu)
{
struct kvm_cpuid_entry2 *best;
- struct kvm_lapic *apic = vcpu->arch.apic;
best = kvm_find_cpuid_entry(vcpu, 1, 0);
if (best) {
@@ -89,26 +88,14 @@ void kvm_update_cpuid(struct kvm_vcpu *vcpu)
vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE);
}
- if (best && 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);
if (best && boot_cpu_has(X86_FEATURE_PKU) && best->function == 0x7)
cpuid_entry_change(best, X86_FEATURE_OSPKE,
kvm_read_cr4_bits(vcpu, X86_CR4_PKE));
best = kvm_find_cpuid_entry(vcpu, 0xD, 0);
- if (!best) {
- vcpu->arch.guest_supported_xcr0 = 0;
- } else {
- vcpu->arch.guest_supported_xcr0 =
- (best->eax | ((u64)best->edx << 32)) & supported_xcr0;
+ if (best)
best->ebx = xstate_required_size(vcpu->arch.xcr0, false);
- }
best = kvm_find_cpuid_entry(vcpu, 0xD, 1);
if (best && (cpuid_entry_has(best, X86_FEATURE_XSAVES) ||
@@ -127,6 +114,27 @@ void kvm_update_cpuid(struct kvm_vcpu *vcpu)
vcpu->arch.ia32_misc_enable_msr &
MSR_IA32_MISC_ENABLE_MWAIT);
}
+}
+
+void kvm_update_vcpu_model(struct kvm_vcpu *vcpu)
+{
+ struct kvm_lapic *apic = vcpu->arch.apic;
+ struct kvm_cpuid_entry2 *best;
+
+ best = kvm_find_cpuid_entry(vcpu, 1, 0);
+ if (best && 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, 0xD, 0);
+ if (!best)
+ vcpu->arch.guest_supported_xcr0 = 0;
+ else
+ vcpu->arch.guest_supported_xcr0 =
+ (best->eax | ((u64)best->edx << 32)) & supported_xcr0;
/* Note, maxphyaddr must be updated before tdp_level. */
vcpu->arch.maxphyaddr = cpuid_query_maxphyaddr(vcpu);
@@ -218,6 +226,7 @@ int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
kvm_apic_set_version(vcpu);
kvm_x86_ops.cpuid_update(vcpu);
kvm_update_cpuid(vcpu);
+ kvm_update_vcpu_model(vcpu);
kvfree(cpuid_entries);
out:
@@ -247,6 +256,7 @@ int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
kvm_apic_set_version(vcpu);
kvm_x86_ops.cpuid_update(vcpu);
kvm_update_cpuid(vcpu);
+ kvm_update_vcpu_model(vcpu);
out:
return r;
}
diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h
index f136de1debad..45e3643e2fba 100644
--- a/arch/x86/kvm/cpuid.h
+++ b/arch/x86/kvm/cpuid.h
@@ -10,6 +10,7 @@ extern u32 kvm_cpu_caps[NCAPINTS] __read_mostly;
void kvm_set_cpu_caps(void);
void kvm_update_cpuid(struct kvm_vcpu *vcpu);
+void kvm_update_vcpu_model(struct kvm_vcpu *vcpu);
struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu,
u32 function, u32 index);
int kvm_dev_ioctl_get_cpuid(struct kvm_cpuid2 *cpuid,
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 09ee54f5e385..6f376392e6e6 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8184,6 +8184,7 @@ static void enter_smm(struct kvm_vcpu *vcpu)
#endif
kvm_update_cpuid(vcpu);
+ kvm_update_vcpu_model(vcpu);
kvm_mmu_reset_context(vcpu);
}
--
2.18.4
next prev parent reply other threads:[~2020-07-08 6:51 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-08 6:50 [PATCH v3 0/8] Refactor handling flow of KVM_SET_CPUID* Xiaoyao Li
2020-07-08 6:50 ` [PATCH v3 1/8] KVM: X86: Reset vcpu->arch.cpuid_nent to 0 if SET_CPUID* fails Xiaoyao Li
2020-07-08 12:00 ` Paolo Bonzini
2020-07-08 6:50 ` [PATCH v3 2/8] KVM: X86: Go on updating other CPUID leaves when leaf 1 is absent Xiaoyao Li
2020-07-08 6:50 ` [PATCH v3 3/8] KVM: X86: Introduce kvm_check_cpuid() Xiaoyao Li
2020-07-08 12:28 ` Xiaoyao Li
2020-07-08 12:43 ` Paolo Bonzini
2020-07-08 6:50 ` Xiaoyao Li [this message]
2020-07-08 12:06 ` [PATCH v3 4/8] KVM: X86: Split kvm_update_cpuid() Paolo Bonzini
2020-07-08 12:33 ` Xiaoyao Li
2020-07-08 12:41 ` Paolo Bonzini
2020-07-08 13:27 ` Xiaoyao Li
2020-07-08 13:30 ` Paolo Bonzini
2020-07-08 6:50 ` [PATCH v3 5/8] KVM: X86: Rename cpuid_update() to update_vcpu_model() Xiaoyao Li
2020-07-08 12:08 ` Paolo Bonzini
2020-07-08 6:50 ` [PATCH v3 6/8] KVM: X86: Move kvm_x86_ops.update_vcpu_model() into kvm_update_vcpu_model() Xiaoyao Li
2020-07-08 6:50 ` [PATCH v3 7/8] KVM: lapic: Use guest_cpuid_has() in kvm_apic_set_version() Xiaoyao Li
2020-07-08 6:50 ` [PATCH v3 8/8] KVM: X86: Move kvm_apic_set_version() to kvm_update_vcpu_model() Xiaoyao Li
2020-07-08 12:10 ` [PATCH v3 0/8] Refactor handling flow of KVM_SET_CPUID* Paolo Bonzini
2020-07-09 4:27 ` Xiaoyao Li
2020-07-09 9:37 ` Paolo Bonzini
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