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@xxxxxxxxxx>
---
arch/x86/kvm/emulate.c | 7 ++++---
arch/x86/kvm/x86.c | 4 +++-
2 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index c8acc1d..ef4a3ab 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2525,8 +2525,9 @@ 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;
@@ -2583,7 +2584,7 @@ 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
@@ -3061,7 +3062,7 @@ 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 f1ebeed..f0b12f4 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3874,6 +3874,7 @@ 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)
@@ -4877,7 +4878,8 @@ 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;
}
--
1.6.5
--
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