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authorGuillaume Thouvenin <guillaume.thouvenin@ext.bull.net>2008-10-28 10:51:30 +0100
committerAvi Kivity <avi@redhat.com>2008-12-31 16:51:48 +0200
commite93f36bcfaa9e899c595e1c446c784a69021854a (patch)
tree25a506f2427ee4cd8f7197a7748fc90efd0bf7b8
parentc0d09828c870f90c6bc72070ada281568f89c63b (diff)
KVM: allow emulator to adjust rip for emulated pio instructions
If we call the emulator we shouldn't call skip_emulated_instruction() in the first place, since the emulator already computes the next rip for us. Thus we move ->skip_emulated_instruction() out of kvm_emulate_pio() and into handle_io() (and the svm equivalent). We also replaced "return 0" by "break" in the "do_io:" case because now the shadow register state needs to be committed. Otherwise eip will never be updated. Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net> Signed-off-by: Avi Kivity <avi@redhat.com>
-rw-r--r--arch/x86/kvm/svm.c1
-rw-r--r--arch/x86/kvm/vmx.c1
-rw-r--r--arch/x86/kvm/x86.c2
-rw-r--r--arch/x86/kvm/x86_emulate.c2
4 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 743aebd7bfc..f0ad4d4217e 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1115,6 +1115,7 @@ static int io_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
rep = (io_info & SVM_IOIO_REP_MASK) != 0;
down = (svm->vmcb->save.rflags & X86_EFLAGS_DF) != 0;
+ skip_emulated_instruction(&svm->vcpu);
return kvm_emulate_pio(&svm->vcpu, kvm_run, in, size, port);
}
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 7623eb7b68d..816d23185fb 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -2687,6 +2687,7 @@ static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
rep = (exit_qualification & 32) != 0;
port = exit_qualification >> 16;
+ skip_emulated_instruction(vcpu);
return kvm_emulate_pio(vcpu, kvm_run, in, size, port);
}
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index ceeac889714..38f79b6aaf1 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2478,8 +2478,6 @@ int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
val = kvm_register_read(vcpu, VCPU_REGS_RAX);
memcpy(vcpu->arch.pio_data, &val, 4);
- kvm_x86_ops->skip_emulated_instruction(vcpu);
-
pio_dev = vcpu_find_pio_dev(vcpu, port, size, !in);
if (pio_dev) {
kernel_pio(pio_dev, vcpu, vcpu->arch.pio_data);
diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c
index 57d7cc45be4..8f60ace1387 100644
--- a/arch/x86/kvm/x86_emulate.c
+++ b/arch/x86/kvm/x86_emulate.c
@@ -1772,7 +1772,7 @@ special_insn:
c->eip = saved_eip;
goto cannot_emulate;
}
- return 0;
+ break;
case 0xf4: /* hlt */
ctxt->vcpu->arch.halt_request = 1;
break;