From: Xiaoyao Li <xiaoyao.li@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Xiaoyao Li <xiaoyao.li@intel.com>
Subject: [PATCH v4 2/5] KVM: x86: Extract kvm_update_cpuid_runtime() from kvm_update_cpuid()
Date: Thu, 9 Jul 2020 12:34:23 +0800 [thread overview]
Message-ID: <20200709043426.92712-3-xiaoyao.li@intel.com> (raw)
In-Reply-To: <20200709043426.92712-1-xiaoyao.li@intel.com>
Beside called in kvm_vcpu_ioctl_set_cpuid*(), kvm_update_cpuid() is also
called 5 places else in x86.c and 1 place else in lapic.c. All those 6
places only need the part of updating guest CPUIDs (OSXSAVE, OSPKE, APIC,
KVM_FEATURE_PV_UNHALT, ...) based on the runtime vcpu state, so extract
them as a separate kvm_update_cpuid_runtime().
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
---
arch/x86/kvm/cpuid.c | 44 +++++++++++++++++++++++++++-----------------
arch/x86/kvm/cpuid.h | 2 +-
arch/x86/kvm/lapic.c | 2 +-
arch/x86/kvm/x86.c | 10 +++++-----
4 files changed, 34 insertions(+), 24 deletions(-)
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 1a053022a961..0ed3b343c44e 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -73,10 +73,9 @@ static int kvm_check_cpuid(struct kvm_vcpu *vcpu)
return 0;
}
-void kvm_update_cpuid(struct kvm_vcpu *vcpu)
+void kvm_update_cpuid_runtime(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) {
@@ -89,28 +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;
-
- kvm_apic_set_version(vcpu);
- }
-
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) ||
@@ -129,6 +114,29 @@ void kvm_update_cpuid(struct kvm_vcpu *vcpu)
vcpu->arch.ia32_misc_enable_msr &
MSR_IA32_MISC_ENABLE_MWAIT);
}
+}
+
+static void kvm_update_cpuid(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;
+
+ kvm_apic_set_version(vcpu);
+ }
+
+ 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);
@@ -221,6 +229,7 @@ int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
cpuid_fix_nx_cap(vcpu);
kvm_x86_ops.cpuid_update(vcpu);
+ kvm_update_cpuid_runtime(vcpu);
kvm_update_cpuid(vcpu);
kvfree(cpuid_entries);
@@ -249,6 +258,7 @@ int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
}
kvm_x86_ops.cpuid_update(vcpu);
+ kvm_update_cpuid_runtime(vcpu);
kvm_update_cpuid(vcpu);
out:
return r;
diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h
index f136de1debad..3a923ae15f2f 100644
--- a/arch/x86/kvm/cpuid.h
+++ b/arch/x86/kvm/cpuid.h
@@ -9,7 +9,7 @@
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_cpuid_runtime(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/lapic.c b/arch/x86/kvm/lapic.c
index e5dbb7ebae78..47801a44cfa6 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -2230,7 +2230,7 @@ void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value)
vcpu->arch.apic_base = value;
if ((old_value ^ value) & MSR_IA32_APICBASE_ENABLE)
- kvm_update_cpuid(vcpu);
+ kvm_update_cpuid_runtime(vcpu);
if (!apic)
return;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 7b987bccf0c8..e27d3db7e43f 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -940,7 +940,7 @@ static int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr)
vcpu->arch.xcr0 = xcr0;
if ((xcr0 ^ old_xcr0) & XFEATURE_MASK_EXTEND)
- kvm_update_cpuid(vcpu);
+ kvm_update_cpuid_runtime(vcpu);
return 0;
}
@@ -1004,7 +1004,7 @@ int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
kvm_mmu_reset_context(vcpu);
if ((cr4 ^ old_cr4) & (X86_CR4_OSXSAVE | X86_CR4_PKE))
- kvm_update_cpuid(vcpu);
+ kvm_update_cpuid_runtime(vcpu);
return 0;
}
@@ -2916,7 +2916,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
if (!guest_cpuid_has(vcpu, X86_FEATURE_XMM3))
return 1;
vcpu->arch.ia32_misc_enable_msr = data;
- kvm_update_cpuid(vcpu);
+ kvm_update_cpuid_runtime(vcpu);
} else {
vcpu->arch.ia32_misc_enable_msr = data;
}
@@ -8170,7 +8170,7 @@ static void enter_smm(struct kvm_vcpu *vcpu)
kvm_x86_ops.set_efer(vcpu, 0);
#endif
- kvm_update_cpuid(vcpu);
+ kvm_update_cpuid_runtime(vcpu);
kvm_mmu_reset_context(vcpu);
}
@@ -9192,7 +9192,7 @@ static int __set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
(X86_CR4_OSXSAVE | X86_CR4_PKE));
kvm_x86_ops.set_cr4(vcpu, sregs->cr4);
if (cpuid_update_needed)
- kvm_update_cpuid(vcpu);
+ kvm_update_cpuid_runtime(vcpu);
idx = srcu_read_lock(&vcpu->kvm->srcu);
if (is_pae_paging(vcpu)) {
--
2.18.4
next prev parent reply other threads:[~2020-07-09 4:34 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-09 4:34 [PATCH v4 0/5] Refactor handling flow of KVM_SET_CPUID* Xiaoyao Li
2020-07-09 4:34 ` [PATCH v4 1/5] KVM: x86: Introduce kvm_check_cpuid() Xiaoyao Li
2020-07-09 4:34 ` Xiaoyao Li [this message]
2020-07-09 10:55 ` [PATCH v4 2/5] KVM: x86: Extract kvm_update_cpuid_runtime() from kvm_update_cpuid() Paolo Bonzini
2020-07-09 4:34 ` [PATCH v4 3/5] KVM: x86: Rename kvm_update_cpuid() to kvm_vcpu_after_set_cpuid() Xiaoyao Li
2020-07-09 4:34 ` [PATCH v4 4/5] KVM: x86: Rename cpuid_update() callback to vcpu_after_set_cpuid() Xiaoyao Li
2020-07-09 4:34 ` [PATCH v4 5/5] KVM: x86: Move kvm_x86_ops.vcpu_after_set_cpuid() into kvm_vcpu_after_set_cpuid() Xiaoyao Li
2020-07-09 11:08 ` [PATCH v4 0/5] Refactor handling flow of KVM_SET_CPUID* Paolo Bonzini
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200709043426.92712-3-xiaoyao.li@intel.com \
--to=xiaoyao.li@intel.com \
--cc=jmattson@google.com \
--cc=joro@8bytes.org \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=pbonzini@redhat.com \
--cc=sean.j.christopherson@intel.com \
--cc=vkuznets@redhat.com \
--cc=wanpengli@tencent.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).