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Commit 3fb1b5db authored by Gleb Natapov's avatar Gleb Natapov Committed by Avi Kivity
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KVM: x86 emulator: add (set|get)_msr callbacks to x86_emulate_ops 



Add (set|get)_msr callbacks to x86_emulate_ops instead of calling
them directly.

Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 35aa5375

arch/x86/include/asm/kvm_emulate.h

+2 −0
Original line number Diff line number Diff line
@@ -139,6 +139,8 @@ struct x86_emulate_ops { 
	void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);

	int (*get_dr)(int dr, unsigned long *dest, struct kvm_vcpu *vcpu);

	int (*set_dr)(int dr, unsigned long value, struct kvm_vcpu *vcpu);

	int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);

	int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);

};



/* Type, address-of, and value of an instruction's operand. */

arch/x86/kvm/emulate.c

+18 −18
Original line number Diff line number Diff line
@@ -1875,7 +1875,7 @@ setup_syscalls_segments(struct x86_emulate_ctxt *ctxt, 
}



static int

emulate_syscall(struct x86_emulate_ctxt *ctxt)

emulate_syscall(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)

{

	struct decode_cache *c = &ctxt->decode;

	struct kvm_segment cs, ss;
@@ -1890,7 +1890,7 @@ emulate_syscall(struct x86_emulate_ctxt *ctxt) 


	setup_syscalls_segments(ctxt, &cs, &ss);



	kvm_x86_ops->get_msr(ctxt->vcpu, MSR_STAR, &msr_data);

	ops->get_msr(ctxt->vcpu, MSR_STAR, &msr_data);

	msr_data >>= 32;

	cs.selector = (u16)(msr_data & 0xfffc);

	ss.selector = (u16)(msr_data + 8);
@@ -1907,17 +1907,17 @@ emulate_syscall(struct x86_emulate_ctxt *ctxt) 
#ifdef CONFIG_X86_64

		c->regs[VCPU_REGS_R11] = ctxt->eflags & ~EFLG_RF;



		kvm_x86_ops->get_msr(ctxt->vcpu,

		ops->get_msr(ctxt->vcpu,

			     ctxt->mode == X86EMUL_MODE_PROT64 ?

			     MSR_LSTAR : MSR_CSTAR, &msr_data);

		c->eip = msr_data;



		kvm_x86_ops->get_msr(ctxt->vcpu, MSR_SYSCALL_MASK, &msr_data);

		ops->get_msr(ctxt->vcpu, MSR_SYSCALL_MASK, &msr_data);

		ctxt->eflags &= ~(msr_data | EFLG_RF);

#endif

	} else {

		/* legacy mode */

		kvm_x86_ops->get_msr(ctxt->vcpu, MSR_STAR, &msr_data);

		ops->get_msr(ctxt->vcpu, MSR_STAR, &msr_data);

		c->eip = (u32)msr_data;



		ctxt->eflags &= ~(EFLG_VM | EFLG_IF | EFLG_RF);
@@ -1927,7 +1927,7 @@ emulate_syscall(struct x86_emulate_ctxt *ctxt) 
}



static int

emulate_sysenter(struct x86_emulate_ctxt *ctxt)

emulate_sysenter(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)

{

	struct decode_cache *c = &ctxt->decode;

	struct kvm_segment cs, ss;
@@ -1949,7 +1949,7 @@ emulate_sysenter(struct x86_emulate_ctxt *ctxt) 


	setup_syscalls_segments(ctxt, &cs, &ss);



	kvm_x86_ops->get_msr(ctxt->vcpu, MSR_IA32_SYSENTER_CS, &msr_data);

	ops->get_msr(ctxt->vcpu, MSR_IA32_SYSENTER_CS, &msr_data);

	switch (ctxt->mode) {

	case X86EMUL_MODE_PROT32:

		if ((msr_data & 0xfffc) == 0x0) {
@@ -1979,17 +1979,17 @@ emulate_sysenter(struct x86_emulate_ctxt *ctxt) 
	kvm_x86_ops->set_segment(ctxt->vcpu, &cs, VCPU_SREG_CS);

	kvm_x86_ops->set_segment(ctxt->vcpu, &ss, VCPU_SREG_SS);



	kvm_x86_ops->get_msr(ctxt->vcpu, MSR_IA32_SYSENTER_EIP, &msr_data);

	ops->get_msr(ctxt->vcpu, MSR_IA32_SYSENTER_EIP, &msr_data);

	c->eip = msr_data;



	kvm_x86_ops->get_msr(ctxt->vcpu, MSR_IA32_SYSENTER_ESP, &msr_data);

	ops->get_msr(ctxt->vcpu, MSR_IA32_SYSENTER_ESP, &msr_data);

	c->regs[VCPU_REGS_RSP] = msr_data;



	return X86EMUL_CONTINUE;

}



static int

emulate_sysexit(struct x86_emulate_ctxt *ctxt)

emulate_sysexit(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)

{

	struct decode_cache *c = &ctxt->decode;

	struct kvm_segment cs, ss;
@@ -2012,7 +2012,7 @@ emulate_sysexit(struct x86_emulate_ctxt *ctxt) 


	cs.dpl = 3;

	ss.dpl = 3;

	kvm_x86_ops->get_msr(ctxt->vcpu, MSR_IA32_SYSENTER_CS, &msr_data);

	ops->get_msr(ctxt->vcpu, MSR_IA32_SYSENTER_CS, &msr_data);

	switch (usermode) {

	case X86EMUL_MODE_PROT32:

		cs.selector = (u16)(msr_data + 16);
@@ -3099,7 +3099,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) 
		}

		break;

	case 0x05: 		/* syscall */

		rc = emulate_syscall(ctxt);

		rc = emulate_syscall(ctxt, ops);

		if (rc != X86EMUL_CONTINUE)

			goto done;

		else
@@ -3155,7 +3155,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) 
		/* wrmsr */

		msr_data = (u32)c->regs[VCPU_REGS_RAX]

			| ((u64)c->regs[VCPU_REGS_RDX] << 32);

		if (kvm_set_msr(ctxt->vcpu, c->regs[VCPU_REGS_RCX], msr_data)) {

		if (ops->set_msr(ctxt->vcpu, c->regs[VCPU_REGS_RCX], msr_data)) {

			kvm_inject_gp(ctxt->vcpu, 0);

			goto done;

		}
@@ -3164,7 +3164,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) 
		break;

	case 0x32:

		/* rdmsr */

		if (kvm_get_msr(ctxt->vcpu, c->regs[VCPU_REGS_RCX], &msr_data)) {

		if (ops->get_msr(ctxt->vcpu, c->regs[VCPU_REGS_RCX], &msr_data)) {

			kvm_inject_gp(ctxt->vcpu, 0);

			goto done;

		} else {
@@ -3175,14 +3175,14 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) 
		c->dst.type = OP_NONE;

		break;

	case 0x34:		/* sysenter */

		rc = emulate_sysenter(ctxt);

		rc = emulate_sysenter(ctxt, ops);

		if (rc != X86EMUL_CONTINUE)

			goto done;

		else

			goto writeback;

		break;

	case 0x35:		/* sysexit */

		rc = emulate_sysexit(ctxt);

		rc = emulate_sysexit(ctxt, ops);

		if (rc != X86EMUL_CONTINUE)

			goto done;

		else

arch/x86/kvm/x86.c

+2 −0
Original line number Diff line number Diff line
@@ -3811,6 +3811,8 @@ static struct x86_emulate_ops emulate_ops = { 
	.set_rflags          = emulator_set_rflags,

	.get_dr              = emulator_get_dr,

	.set_dr              = emulator_set_dr,

	.set_msr             = kvm_set_msr,

	.get_msr             = kvm_get_msr,

};



static void cache_all_regs(struct kvm_vcpu *vcpu)