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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 <ryanh@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Ryan Harper 2007-09-18 14:05:16 -05:00 committed by Avi Kivity
parent 12b7d28fc1
commit 217648638c
1 changed files with 4 additions and 7 deletions
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11
drivers/kvm/kvm_main.c
View File

@ -554,14 +554,11 @@ void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
inject_gp(vcpu); inject_gp(vcpu);
return; 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); mutex_lock(&vcpu->kvm->lock);