repository: /home/avi/kvm/linux-2.6
branch: pf-opt-2
commit 62d1ea7fdcdb905072198e4cec8f724c8ad33092
Author: Ryan Harper <[EMAIL PROTECTED]>
Date: Tue Sep 18 14:05:16 2007 -0500
KVM: MMU: Ignore reserved bits in cr3 in non-pae mode
This patch removes the fault injected when the guest attempts to set
reserved
bits in cr3. X86 hardware doesn't generate a fault when setting reserved
bits.
The result of this patch is that vmware-server, running within a kvm guest,
boots and runs memtest from an iso.
Signed-off-by: Ryan Harper <[EMAIL PROTECTED]>
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index bcb04c1..cecdb1b 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -574,14 +574,11 @@ void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
inject_gp(vcpu);
return;
}
- } else {
- if (cr3 & CR3_NONPAE_RESERVED_BITS) {
- printk(KERN_DEBUG
- "set_cr3: #GP, reserved bits\n");
- inject_gp(vcpu);
- return;
- }
}
+ /*
+ * We don't check reserved bits in nonpae mode, because
+ * this isn't enforced, and VMware depends on this.
+ */
}
mutex_lock(&vcpu->kvm->lock);
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