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authorRoedel, Joerg <Joerg.Roedel@amd.com>2010-12-03 13:15:21 +0100
committerAvi Kivity <avi@redhat.com>2011-01-12 11:30:22 +0200
commit8d28fec406e4d5ce6c109fe12699976e72e9748e (patch)
tree1d5403a970d7688ef0bed73268ddb84d68e1f7bd
parent700e1b12196c4b01524ca10d89f8731418d72b6e (diff)
downloadop-kernel-dev-8d28fec406e4d5ce6c109fe12699976e72e9748e.zip
op-kernel-dev-8d28fec406e4d5ce6c109fe12699976e72e9748e.tar.gz
KVM: SVM: Add clean-bits infrastructure code
This patch adds the infrastructure for the implementation of the individual clean-bits. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
-rw-r--r--arch/x86/include/asm/svm.h3
-rw-r--r--arch/x86/kvm/svm.c31
2 files changed, 33 insertions, 1 deletions
diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h
index 11dbca7..235dd73 100644
--- a/arch/x86/include/asm/svm.h
+++ b/arch/x86/include/asm/svm.h
@@ -79,7 +79,8 @@ struct __attribute__ ((__packed__)) vmcb_control_area {
u32 event_inj_err;
u64 nested_cr3;
u64 lbr_ctl;
- u64 reserved_5;
+ u32 clean;
+ u32 reserved_5;
u64 next_rip;
u8 reserved_6[816];
};
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 5038786..e73cbc3 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -185,6 +185,28 @@ static int nested_svm_vmexit(struct vcpu_svm *svm);
static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
bool has_error_code, u32 error_code);
+enum {
+ VMCB_DIRTY_MAX,
+};
+
+#define VMCB_ALWAYS_DIRTY_MASK 0U
+
+static inline void mark_all_dirty(struct vmcb *vmcb)
+{
+ vmcb->control.clean = 0;
+}
+
+static inline void mark_all_clean(struct vmcb *vmcb)
+{
+ vmcb->control.clean = ((1 << VMCB_DIRTY_MAX) - 1)
+ & ~VMCB_ALWAYS_DIRTY_MASK;
+}
+
+static inline void mark_dirty(struct vmcb *vmcb, int bit)
+{
+ vmcb->control.clean &= ~(1 << bit);
+}
+
static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu)
{
return container_of(vcpu, struct vcpu_svm, vcpu);
@@ -973,6 +995,8 @@ static void init_vmcb(struct vcpu_svm *svm)
set_intercept(svm, INTERCEPT_PAUSE);
}
+ mark_all_dirty(svm->vmcb);
+
enable_gif(svm);
}
@@ -1089,6 +1113,7 @@ static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
if (unlikely(cpu != vcpu->cpu)) {
svm->asid_generation = 0;
+ mark_all_dirty(svm->vmcb);
}
#ifdef CONFIG_X86_64
@@ -2140,6 +2165,8 @@ static int nested_svm_vmexit(struct vcpu_svm *svm)
svm->vmcb->save.cpl = 0;
svm->vmcb->control.exit_int_info = 0;
+ mark_all_dirty(svm->vmcb);
+
nested_svm_unmap(page);
nested_svm_uninit_mmu_context(&svm->vcpu);
@@ -2351,6 +2378,8 @@ static bool nested_svm_vmrun(struct vcpu_svm *svm)
enable_gif(svm);
+ mark_all_dirty(svm->vmcb);
+
return true;
}
@@ -3490,6 +3519,8 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
if (unlikely(svm->vmcb->control.exit_code ==
SVM_EXIT_EXCP_BASE + MC_VECTOR))
svm_handle_mce(svm);
+
+ mark_all_clean(svm->vmcb);
}
#undef R
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