[PATCH v2 1/5] KVM: X86: Dynamic allocate core residency msr state

[Wanpeng Li]

From: Wanpeng Li <wanpen...@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 <pbonz...@redhat.com>
Cc: Radim Krčmář <rkrc...@redhat.com>
Signed-off-by: Wanpeng Li <wanpen...@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