Return new RIP as part of instruction emulation result instead of updating KVM's RIP from x86 emulator code.
Signed-off-by: Gleb Natapov <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
