[patch 25/60] KVM: VMX: Force vm86 mode if setting flags during real mode

Greg KH
2007-12-13T07:06:38Z

[-- Attachment #1: kvm-vmx-force-vm86-mode-if-setting-flags-during-real-mode.patch --]
[-- Type: text/plain, Size: 767 bytes --]

2.6.23-stable review patch. If anyone has any objections, please let us
know.

------------------
From: Avi Kivity <avi@qumranet.com>

patch 78f7826868da8e27d097802139a3fec39f47f3b8 in mainline.

When resetting from userspace, we need to handle the flags being cleared
even after we are in real mode.

Signed-off-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/kvm/vmx.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -463,6 +463,8 @@ static unsigned long vmx_get_rflags(stru

static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
{
+ if (vcpu->rmode.active)
+ rflags |= IOPL_MASK | X86_EFLAGS_VM;
vmcs_writel(GUEST_RFLAGS, rflags);
}

--