From: Wanpeng Li <kernellwp@gmail.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>
Subject: [PATCH v2 1/5] KVM: X86: Dynamic allocate core residency msr state
Date: Tue, 11 Jun 2019 15:34:07 +0800 [thread overview]
Message-ID: <1560238451-19495-2-git-send-email-wanpengli@tencent.com> (raw)
In-Reply-To: <1560238451-19495-1-git-send-email-wanpengli@tencent.com>
From: Wanpeng Li <wanpengli@tencent.com>
Dynamic allocate core residency msr state. MSR_CORE_C1_RES is unreadable
except for ATOM platform, so it is ignore here.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
---
arch/x86/include/asm/kvm_host.h | 11 +++++++++++
arch/x86/kvm/vmx/vmx.c | 5 +++++
2 files changed, 16 insertions(+)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 15e973d..bd615ee 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -538,6 +538,15 @@ struct kvm_vcpu_hv {
cpumask_t tlb_flush;
};
+#define NR_CORE_RESIDENCY_MSRS 3
+
+struct kvm_residency_msr {
+ s64 value;
+ u32 index;
+ bool delta_from_host;
+ bool count_with_host;
+};
+
struct kvm_vcpu_arch {
/*
* rip and regs accesses must go through
@@ -785,6 +794,8 @@ struct kvm_vcpu_arch {
/* AMD MSRC001_0015 Hardware Configuration */
u64 msr_hwcr;
+
+ struct kvm_residency_msr *core_cstate_msrs;
};
struct kvm_lpage_info {
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 0b241f4..4dc2459 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -6658,6 +6658,11 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
goto free_vmcs;
}
+ vmx->vcpu.arch.core_cstate_msrs = kzalloc(sizeof(struct kvm_residency_msr) *
+ NR_CORE_RESIDENCY_MSRS, GFP_KERNEL_ACCOUNT);
+ if (!vmx->vcpu.arch.core_cstate_msrs)
+ goto free_vmcs;
+
if (nested)
nested_vmx_setup_ctls_msrs(&vmx->nested.msrs,
vmx_capability.ept,
--
2.7.4
next prev parent reply other threads:[~2019-06-11 7:34 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-11 7:34 [PATCH v2 0/5] KVM: X86: Add virtual C-states residency msrs support Wanpeng Li
2019-06-11 7:34 ` Wanpeng Li [this message]
2019-06-12 16:01 ` [PATCH v2 1/5] KVM: X86: Dynamic allocate core residency msr state Sean Christopherson
2019-06-13 0:43 ` Wanpeng Li
2019-06-11 7:34 ` [PATCH v2 2/5] KVM: X86: Introduce residency msrs read/write operations Wanpeng Li
2019-06-11 7:34 ` [PATCH v2 3/5] KVM: X86: setup residency msrs during vCPU creation Wanpeng Li
2019-06-11 7:34 ` [PATCH v2 4/5] KVM: VMX: Add get/set residency msrs logic Wanpeng Li
2019-06-11 7:34 ` [PATCH v2 5/5] KVM: X86: Save/restore residency values when vCPU migrations Wanpeng Li
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