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Commit 2030753d authored by Joerg Roedel's avatar Joerg Roedel Committed by Avi Kivity
Browse files

KVM: SVM: Make Use of the generic guest-mode functions 



This patch replaces the is_nested logic in the SVM module
with the generic notion of guest-mode.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent ec9e60b2

arch/x86/kvm/svm.c

+21 −23
Original line number Diff line number Diff line
@@ -192,11 +192,6 @@ static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu) 
	return container_of(vcpu, struct vcpu_svm, vcpu);

}



static inline bool is_nested(struct vcpu_svm *svm)

{

	return svm->nested.vmcb;

}



static inline void enable_gif(struct vcpu_svm *svm)

{

	svm->vcpu.arch.hflags |= HF_GIF_MASK;
@@ -727,7 +722,7 @@ static void svm_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) 
	struct vcpu_svm *svm = to_svm(vcpu);

	u64 g_tsc_offset = 0;



	if (is_nested(svm)) {

	if (is_guest_mode(vcpu)) {

		g_tsc_offset = svm->vmcb->control.tsc_offset -

			       svm->nested.hsave->control.tsc_offset;

		svm->nested.hsave->control.tsc_offset = offset;
@@ -741,7 +736,7 @@ static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment) 
	struct vcpu_svm *svm = to_svm(vcpu);



	svm->vmcb->control.tsc_offset += adjustment;

	if (is_nested(svm))

	if (is_guest_mode(vcpu))

		svm->nested.hsave->control.tsc_offset += adjustment;

}
@@ -1209,7 +1204,7 @@ static void update_cr0_intercept(struct vcpu_svm *svm) 
	if (gcr0 == *hcr0 && svm->vcpu.fpu_active) {

		vmcb->control.intercept_cr_read &= ~INTERCEPT_CR0_MASK;

		vmcb->control.intercept_cr_write &= ~INTERCEPT_CR0_MASK;

		if (is_nested(svm)) {

		if (is_guest_mode(&svm->vcpu)) {

			struct vmcb *hsave = svm->nested.hsave;



			hsave->control.intercept_cr_read  &= ~INTERCEPT_CR0_MASK;
@@ -1220,7 +1215,7 @@ static void update_cr0_intercept(struct vcpu_svm *svm) 
	} else {

		svm->vmcb->control.intercept_cr_read |= INTERCEPT_CR0_MASK;

		svm->vmcb->control.intercept_cr_write |= INTERCEPT_CR0_MASK;

		if (is_nested(svm)) {

		if (is_guest_mode(&svm->vcpu)) {

			struct vmcb *hsave = svm->nested.hsave;



			hsave->control.intercept_cr_read |= INTERCEPT_CR0_MASK;
@@ -1233,7 +1228,7 @@ static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) 
{

	struct vcpu_svm *svm = to_svm(vcpu);



	if (is_nested(svm)) {

	if (is_guest_mode(vcpu)) {

		/*

		 * We are here because we run in nested mode, the host kvm

		 * intercepts cr0 writes but the l1 hypervisor does not.
@@ -1471,7 +1466,7 @@ static void svm_fpu_activate(struct kvm_vcpu *vcpu) 
	struct vcpu_svm *svm = to_svm(vcpu);

	u32 excp;



	if (is_nested(svm)) {

	if (is_guest_mode(vcpu)) {

		u32 h_excp, n_excp;



		h_excp  = svm->nested.hsave->control.intercept_exceptions;
@@ -1701,7 +1696,7 @@ static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr, 
{

	int vmexit;



	if (!is_nested(svm))

	if (!is_guest_mode(&svm->vcpu))

		return 0;



	svm->vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr;
@@ -1719,7 +1714,7 @@ static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr, 
/* This function returns true if it is save to enable the irq window */

static inline bool nested_svm_intr(struct vcpu_svm *svm)

{

	if (!is_nested(svm))

	if (!is_guest_mode(&svm->vcpu))

		return true;



	if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
@@ -1758,7 +1753,7 @@ static inline bool nested_svm_intr(struct vcpu_svm *svm) 
/* This function returns true if it is save to enable the nmi window */

static inline bool nested_svm_nmi(struct vcpu_svm *svm)

{

	if (!is_nested(svm))

	if (!is_guest_mode(&svm->vcpu))

		return true;



	if (!(svm->nested.intercept & (1ULL << INTERCEPT_NMI)))
@@ -1995,7 +1990,8 @@ static int nested_svm_vmexit(struct vcpu_svm *svm) 
	if (!nested_vmcb)

		return 1;



	/* Exit nested SVM mode */

	/* Exit Guest-Mode */

	leave_guest_mode(&svm->vcpu);

	svm->nested.vmcb = 0;



	/* Give the current vmcb to the guest */
@@ -2303,7 +2299,9 @@ static bool nested_svm_vmrun(struct vcpu_svm *svm) 


	nested_svm_unmap(page);



	/* nested_vmcb is our indicator if nested SVM is activated */

	/* Enter Guest-Mode */

	enter_guest_mode(&svm->vcpu);



	svm->nested.vmcb = vmcb_gpa;



	enable_gif(svm);
@@ -2589,7 +2587,7 @@ static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data) 
	case MSR_IA32_TSC: {

		u64 tsc_offset;



		if (is_nested(svm))

		if (is_guest_mode(vcpu))

			tsc_offset = svm->nested.hsave->control.tsc_offset;

		else

			tsc_offset = svm->vmcb->control.tsc_offset;
@@ -3003,7 +3001,7 @@ static int handle_exit(struct kvm_vcpu *vcpu) 
		return 1;

	}



	if (is_nested(svm)) {

	if (is_guest_mode(vcpu)) {

		int vmexit;



		trace_kvm_nested_vmexit(svm->vmcb->save.rip, exit_code,
@@ -3110,7 +3108,7 @@ static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr) 
{

	struct vcpu_svm *svm = to_svm(vcpu);



	if (is_nested(svm) && (vcpu->arch.hflags & HF_VINTR_MASK))

	if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))

		return;



	if (irr == -1)
@@ -3164,7 +3162,7 @@ static int svm_interrupt_allowed(struct kvm_vcpu *vcpu) 


	ret = !!(vmcb->save.rflags & X86_EFLAGS_IF);



	if (is_nested(svm))

	if (is_guest_mode(vcpu))

		return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK);



	return ret;
@@ -3221,7 +3219,7 @@ static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu) 
{

	struct vcpu_svm *svm = to_svm(vcpu);



	if (is_nested(svm) && (vcpu->arch.hflags & HF_VINTR_MASK))

	if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))

		return;



	if (!(svm->vmcb->control.intercept_cr_write & INTERCEPT_CR8_MASK)) {
@@ -3235,7 +3233,7 @@ static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu) 
	struct vcpu_svm *svm = to_svm(vcpu);

	u64 cr8;



	if (is_nested(svm) && (vcpu->arch.hflags & HF_VINTR_MASK))

	if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))

		return;



	cr8 = kvm_get_cr8(vcpu);
@@ -3621,7 +3619,7 @@ static void svm_fpu_deactivate(struct kvm_vcpu *vcpu) 
	struct vcpu_svm *svm = to_svm(vcpu);



	svm->vmcb->control.intercept_exceptions |= 1 << NM_VECTOR;

	if (is_nested(svm))

	if (is_guest_mode(vcpu))

		svm->nested.hsave->control.intercept_exceptions |= 1 << NM_VECTOR;

	update_cr0_intercept(svm);

}