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Date: Mon, 6 Jun 2022 21:08:29 +0300
From: Maxim Levitsky <mlevitsk@...hat.com>
To: kvm@...r.kernel.org
Cc: Wanpeng Li <wanpengli@...cent.com>,
Vitaly Kuznetsov <vkuznets@...hat.com>,
Sean Christopherson <seanjc@...gle.com>,
Jim Mattson <jmattson@...gle.com>,
"H. Peter Anvin" <hpa@...or.com>, Joerg Roedel <joro@...tes.org>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Ingo Molnar <mingo@...hat.com>,
Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
linux-kernel@...r.kernel.org, Maxim Levitsky <mlevitsk@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
Borislav Petkov <bp@...en8.de>,
Paolo Bonzini <pbonzini@...hat.com>
Subject: [PATCH 7/7] KVM: x86: SVM: there is no need for preempt safe wrappers for avic_vcpu_load/put
Now that these functions are always called with preemption disabled -
remove them.
No functional change intended.
Signed-off-by: Maxim Levitsky <mlevitsk@...hat.com>
---
arch/x86/kvm/svm/avic.c | 27 ++++-----------------------
arch/x86/kvm/svm/svm.c | 4 ++--
arch/x86/kvm/svm/svm.h | 4 ++--
3 files changed, 8 insertions(+), 27 deletions(-)
diff --git a/arch/x86/kvm/svm/avic.c b/arch/x86/kvm/svm/avic.c
index 5d98ac575dedc..5542d8959e114 100644
--- a/arch/x86/kvm/svm/avic.c
+++ b/arch/x86/kvm/svm/avic.c
@@ -946,7 +946,7 @@ avic_update_iommu_vcpu_affinity(struct kvm_vcpu *vcpu, int cpu, bool r)
return ret;
}
-void __avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
+void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
u64 entry;
int h_physical_id = kvm_cpu_get_apicid(cpu);
@@ -978,7 +978,7 @@ void __avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
avic_update_iommu_vcpu_affinity(vcpu, h_physical_id, true);
}
-void __avic_vcpu_put(struct kvm_vcpu *vcpu)
+void avic_vcpu_put(struct kvm_vcpu *vcpu)
{
u64 entry;
struct vcpu_svm *svm = to_svm(vcpu);
@@ -997,25 +997,6 @@ void __avic_vcpu_put(struct kvm_vcpu *vcpu)
WRITE_ONCE(*(svm->avic_physical_id_cache), entry);
}
-static void avic_vcpu_load(struct kvm_vcpu *vcpu)
-{
- int cpu = get_cpu();
-
- WARN_ON(cpu != vcpu->cpu);
-
- __avic_vcpu_load(vcpu, cpu);
-
- put_cpu();
-}
-
-static void avic_vcpu_put(struct kvm_vcpu *vcpu)
-{
- preempt_disable();
-
- __avic_vcpu_put(vcpu);
-
- preempt_enable();
-}
void avic_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu)
{
@@ -1042,7 +1023,7 @@ void avic_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu)
vmcb_mark_dirty(vmcb, VMCB_AVIC);
if (activated)
- avic_vcpu_load(vcpu);
+ avic_vcpu_load(vcpu, vcpu->cpu);
else
avic_vcpu_put(vcpu);
@@ -1075,5 +1056,5 @@ void avic_vcpu_unblocking(struct kvm_vcpu *vcpu)
if (!kvm_vcpu_apicv_active(vcpu))
return;
- avic_vcpu_load(vcpu);
+ avic_vcpu_load(vcpu, vcpu->cpu);
}
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 4aea82f668fb1..b909769c73f03 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -1439,13 +1439,13 @@ static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
indirect_branch_prediction_barrier();
}
if (kvm_vcpu_apicv_active(vcpu))
- __avic_vcpu_load(vcpu, cpu);
+ avic_vcpu_load(vcpu, cpu);
}
static void svm_vcpu_put(struct kvm_vcpu *vcpu)
{
if (kvm_vcpu_apicv_active(vcpu))
- __avic_vcpu_put(vcpu);
+ avic_vcpu_put(vcpu);
svm_prepare_host_switch(vcpu);
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index cd92f43437539..035020d073477 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -614,8 +614,8 @@ void avic_init_vmcb(struct vcpu_svm *svm, struct vmcb *vmcb);
int avic_incomplete_ipi_interception(struct kvm_vcpu *vcpu);
int avic_unaccelerated_access_interception(struct kvm_vcpu *vcpu);
int avic_init_vcpu(struct vcpu_svm *svm);
-void __avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
-void __avic_vcpu_put(struct kvm_vcpu *vcpu);
+void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
+void avic_vcpu_put(struct kvm_vcpu *vcpu);
void avic_apicv_post_state_restore(struct kvm_vcpu *vcpu);
void avic_set_virtual_apic_mode(struct kvm_vcpu *vcpu);
void avic_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu);
--
2.26.3
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