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KVM: x86 emulator: store x86_emulate_ops in emulation context 

It doesn't ever change, so we don't need to pass it around everywhere.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Avi Kivity 2010-07-29 15:11:50 +03:00
parent ab85b12b1a
commit 9aabc88fc8
3 changed files with 13 additions and 11 deletions
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9
arch/x86/include/asm/kvm_emulate.h
View File

@ -208,6 +208,8 @@ struct decode_cache {
};
struct x86_emulate_ctxt {
struct x86_emulate_ops *ops;
/* Register state before/after emulation. */
struct kvm_vcpu *vcpu;
@ -249,12 +251,9 @@ struct x86_emulate_ctxt {
#define X86EMUL_MODE_HOST X86EMUL_MODE_PROT64
#endif
int x86_decode_insn(struct x86_emulate_ctxt *ctxt,
struct x86_emulate_ops *ops);
int x86_emulate_insn(struct x86_emulate_ctxt *ctxt,
struct x86_emulate_ops *ops);
int x86_decode_insn(struct x86_emulate_ctxt *ctxt);
int x86_emulate_insn(struct x86_emulate_ctxt *ctxt);
int emulator_task_switch(struct x86_emulate_ctxt *ctxt,
struct x86_emulate_ops *ops,
u16 tss_selector, int reason,
bool has_error_code, u32 error_code);

8
arch/x86/kvm/emulate.c
View File

@ -943,8 +943,9 @@ done:
}
int
x86_decode_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
x86_decode_insn(struct x86_emulate_ctxt *ctxt)
{
struct x86_emulate_ops *ops = ctxt->ops;
struct decode_cache *c = &ctxt->decode;
int rc = X86EMUL_CONTINUE;
int mode = ctxt->mode;
@ -2586,10 +2587,10 @@ static int emulator_do_task_switch(struct x86_emulate_ctxt *ctxt,
}
int emulator_task_switch(struct x86_emulate_ctxt *ctxt,
struct x86_emulate_ops *ops,
u16 tss_selector, int reason,
bool has_error_code, u32 error_code)
{
struct x86_emulate_ops *ops = ctxt->ops;
struct decode_cache *c = &ctxt->decode;
int rc;
@ -2619,8 +2620,9 @@ static void string_addr_inc(struct x86_emulate_ctxt *ctxt, unsigned long base,
}
int
x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
{
struct x86_emulate_ops *ops = ctxt->ops;
u64 msr_data;
struct decode_cache *c = &ctxt->decode;
int rc = X86EMUL_CONTINUE;

7
arch/x86/kvm/x86.c
View File

@ -3998,7 +3998,7 @@ int emulate_instruction(struct kvm_vcpu *vcpu,
vcpu->arch.emulate_ctxt.interruptibility = 0;
vcpu->arch.emulate_ctxt.exception = -1;
r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
r = x86_decode_insn(&vcpu->arch.emulate_ctxt);
trace_kvm_emulate_insn_start(vcpu);
/* Only allow emulation of specific instructions on #UD
@ -4048,7 +4048,7 @@ int emulate_instruction(struct kvm_vcpu *vcpu,
memcpy(c->regs, vcpu->arch.regs, sizeof c->regs);
restart:
r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
r = x86_emulate_insn(&vcpu->arch.emulate_ctxt);
if (r) { /* emulation failed */
if (reexecute_instruction(vcpu, cr2))
@ -5067,7 +5067,7 @@ int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason,
memset(c, 0, sizeof(struct decode_cache));
memcpy(c->regs, vcpu->arch.regs, sizeof c->regs);
ret = emulator_task_switch(&vcpu->arch.emulate_ctxt, &emulate_ops,
ret = emulator_task_switch(&vcpu->arch.emulate_ctxt,
tss_selector, reason, has_error_code,
error_code);
@ -5424,6 +5424,7 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
BUG_ON(vcpu->kvm == NULL);
kvm = vcpu->kvm;
vcpu->arch.emulate_ctxt.ops = &emulate_ops;
vcpu->arch.mmu.root_hpa = INVALID_PAGE;
if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu))
vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;