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authorGleb Natapov <gleb@redhat.com>2010-04-28 16:15:39 (GMT)
committerAvi Kivity <avi@redhat.com>2010-08-01 07:35:35 (GMT)
commit95c5588652f7742a21c33d9dcce0e043e057d04f (patch)
tree6f948ccbb9e8996d2af5890ecee32b31db72877c
parent3457e4192e367fd4e0da5e9f46f9df85fa99cd11 (diff)
downloadlinux-fsl-qoriq-95c5588652f7742a21c33d9dcce0e043e057d04f.tar.xz
KVM: x86 emulator: advance RIP outside x86 emulator code
Return new RIP as part of instruction emulation result instead of updating KVM's RIP from x86 emulator code. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
-rw-r--r--arch/x86/kvm/emulate.c7
-rw-r--r--arch/x86/kvm/x86.c2
2 files changed, 6 insertions, 3 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index d7a18a0..437f31b 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2496,8 +2496,9 @@ int emulator_task_switch(struct x86_emulate_ctxt *ctxt,
if (rc == X86EMUL_CONTINUE) {
memcpy(ctxt->vcpu->arch.regs, c->regs, sizeof c->regs);
- kvm_rip_write(ctxt->vcpu, c->eip);
rc = writeback(ctxt, ops);
+ if (rc == X86EMUL_CONTINUE)
+ ctxt->eip = c->eip;
}
return (rc == X86EMUL_UNHANDLEABLE) ? -1 : 0;
@@ -2554,7 +2555,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
if (address_mask(c, c->regs[VCPU_REGS_RCX]) == 0) {
string_done:
ctxt->restart = false;
- kvm_rip_write(ctxt->vcpu, c->eip);
+ ctxt->eip = c->eip;
goto done;
}
/* The second termination condition only applies for REPE
@@ -3032,7 +3033,7 @@ writeback:
ctxt->decode.mem_read.end = 0;
/* Commit shadow register state. */
memcpy(ctxt->vcpu->arch.regs, c->regs, sizeof c->regs);
- kvm_rip_write(ctxt->vcpu, c->eip);
+ ctxt->eip = c->eip;
ops->set_rflags(ctxt->vcpu, ctxt->eflags);
done:
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 9e5a833..8f45cc7 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3941,6 +3941,7 @@ restart:
shadow_mask = vcpu->arch.emulate_ctxt.interruptibility;
kvm_x86_ops->set_interrupt_shadow(vcpu, shadow_mask);
+ kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.eip);
if (vcpu->arch.pio.count) {
if (!vcpu->arch.pio.in)
@@ -4945,6 +4946,7 @@ int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason,
if (ret)
return EMULATE_FAIL;
+ kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.eip);
kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags);
return EMULATE_DONE;
}