KVM: vmx: hack set_cr0_no_modeswitch() to actually do modeswitch

The whole thing is rotten, but this allows vmx to boot with the guest reboot
fix.

Signed-off-by: Markus Rechberger <markus.rechberger@amd.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index ff3bfc5c390a..e02c59807a7e 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -791,6 +791,9 @@ static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
  */
 static void vmx_set_cr0_no_modeswitch(struct kvm_vcpu *vcpu, unsigned long cr0)
 {
+        if (!vcpu->rmode.active && !(cr0 & CR0_PE_MASK))
+                enter_rmode(vcpu);
+
         vcpu->rmode.active = ((cr0 & CR0_PE_MASK) == 0);
         update_exception_bitmap(vcpu);
         vmcs_writel(CR0_READ_SHADOW, cr0);