[PATCH 055/104] KVM: Communicate cr8 changes to userspace

Avi Kivity
2007-09-17T08:31:37Z

From: Yang, Sheng <sheng.yang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

This allows running 64-bit Windows.

Signed-off-by: Sheng Yang <sheng.yang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
---
drivers/kvm/vmx.c | 3 ++-
include/linux/kvm.h | 1 +
2 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index a9b4cb5..cd999c0 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -1831,7 +1831,8 @@ static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
vcpu_load_rsp_rip(vcpu);
set_cr8(vcpu, vcpu->regs[reg]);
skip_emulated_instruction(vcpu);
- return 1;
+ kvm_run->exit_reason = KVM_EXIT_SET_TPR;
+ return 0;
};
break;
case 2: /* clts */
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index 91a446f..1d5a49c 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -46,6 +46,7 @@ enum kvm_exit_reason {
KVM_EXIT_SHUTDOWN = 8,
KVM_EXIT_FAIL_ENTRY = 9,
KVM_EXIT_INTR = 10,
+ KVM_EXIT_SET_TPR = 11
};

/* for KVM_RUN, returned by mmap(vcpu_fd, offset=0) */