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KVM: x86 emulator: Clean up init_emulate_ctxt() 

Use a local pointer to the emulate_ctxt for simplicity.  Then, arrange
the hard-to-read mode selection lines neatly.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Takuya Yoshikawa 2011-05-25 11:06:16 +09:00 committed by Avi Kivity
parent d780592b99
commit adf52235b4
1 changed files with 11 additions and 10 deletions
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21
arch/x86/kvm/x86.c
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@ -4508,7 +4508,8 @@ static void inject_emulated_exception(struct kvm_vcpu *vcpu)
static void init_emulate_ctxt(struct kvm_vcpu *vcpu)
{
struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode;
struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
struct decode_cache *c = &ctxt->decode;
int cs_db, cs_l;
/*
@ -4521,15 +4522,15 @@ static void init_emulate_ctxt(struct kvm_vcpu *vcpu)
kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
vcpu->arch.emulate_ctxt.eflags = kvm_get_rflags(vcpu);
vcpu->arch.emulate_ctxt.eip = kvm_rip_read(vcpu);
vcpu->arch.emulate_ctxt.mode =
(!is_protmode(vcpu)) ? X86EMUL_MODE_REAL :
(vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM)
? X86EMUL_MODE_VM86 : cs_l
? X86EMUL_MODE_PROT64 : cs_db
? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
vcpu->arch.emulate_ctxt.guest_mode = is_guest_mode(vcpu);
ctxt->eflags = kvm_get_rflags(vcpu);
ctxt->eip = kvm_rip_read(vcpu);
ctxt->mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL :
(ctxt->eflags & X86_EFLAGS_VM) ? X86EMUL_MODE_VM86 :
cs_l ? X86EMUL_MODE_PROT64 :
cs_db ? X86EMUL_MODE_PROT32 :
X86EMUL_MODE_PROT16;
ctxt->guest_mode = is_guest_mode(vcpu);
memset(c, 0, sizeof(struct decode_cache));
memcpy(c->regs, vcpu->arch.regs, sizeof c->regs);
vcpu->arch.emulate_regs_need_sync_from_vcpu = false;