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Commit 8d28fec4 authored by Roedel, Joerg's avatar Roedel, Joerg Committed by Avi Kivity
Browse files

KVM: SVM: Add clean-bits infrastructure code 



This patch adds the infrastructure for the implementation of
the individual clean-bits.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 700e1b12

arch/x86/include/asm/svm.h

+2 −1
Original line number Diff line number Diff line
@@ -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];

};

arch/x86/kvm/svm.c

+31 −0
Original line number Diff line number Diff line
@@ -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