Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=038881c8bec0e9a796d1782c56e29e7c2456626d
Commit: 038881c8bec0e9a796d1782c56e29e7c2456626d
Parent: 024aa1c02f0a9f938af83f55c727bcb18187eba4
Author: Avi Kivity <[EMAIL PROTECTED]>
AuthorDate: Wed Mar 21 17:58:32 2007 +0200
Committer: Avi Kivity <[EMAIL PROTECTED]>
CommitDate: Thu May 3 10:52:26 2007 +0300
KVM: Hack real-mode segments on vmx from KVM_SET_SREGS
As usual, we need to mangle segment registers when emulating real mode
as vm86 has specific constraints. We special case the reset segment base,
and set the "access rights" (or descriptor flags) to vm86 comaptible values.
This fixes reboot on vmx.
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
---
drivers/kvm/vmx.c | 9 ++++++++-
1 files changed, 8 insertions(+), 1 deletions(-)
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 027a962..578dff5 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -864,7 +864,14 @@ static void vmx_set_segment(struct kvm_vcpu *vcpu,
vmcs_writel(sf->base, var->base);
vmcs_write32(sf->limit, var->limit);
vmcs_write16(sf->selector, var->selector);
- if (var->unusable)
+ if (vcpu->rmode.active && var->s) {
+ /*
+ * Hack real-mode segments into vm86 compatibility.
+ */
+ if (var->base == 0xffff0000 && var->selector == 0xf000)
+ vmcs_writel(sf->base, 0xf0000);
+ ar = 0xf3;
+ } else if (var->unusable)
ar = 1 << 16;
else {
ar = var->type & 15;
-
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