On 05/26/2011 01:28 PM, Markus Schade wrote:
On 05/26/2011 08:44 AM, Avi Kivity wrote:
On 05/25/2011 09:49 AM, Markus Schade wrote:
Git bisect tells me that this is the first bad commit:
-----------------%<-----------------
aff48baa34c033318ad322ecbf2e4bcd891b29ca is the first bad commit
Does your machine have ept?
(cat /sys/module/kvm_intel/parameters/ept)
Sure. (Assuming that the Y means yes). I am no C developer, but I was
wondering, if the issue is related to the difference in
ept_update_paging_mode_cr0 between original patch in the kvm git and the
linux-2.6. git tree.
I have re-added the missing 4 lines to ept_update_paging_mode_cr0 in
vmx.c, which resolves this issue for in Kernel 2.6,37 and 2.6.39.
I haven't tested all guests, but neither Squeeze nor 2008 R2 reboot anymore.
Markus
static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer)
@@ -1921,6 +1940,8 @@
unsigned long cr0,
struct kvm_vcpu *vcpu)
{
+ ulong cr3;
+
vmx_decache_cr3(vcpu);
if (!(cr0 & X86_CR0_PG)) {
/* From paging/starting to nonpaging */
@@ -1936,8 +1957,11 @@
vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) &
~(CPU_BASED_CR3_LOAD_EXITING |
CPU_BASED_CR3_STORE_EXITING));
+ /* Must fetch cr3 before updating cr0 */
+ cr3 = kvm_read_cr3(vcpu);
vcpu->arch.cr0 = cr0;
vmx_set_cr4(vcpu, kvm_read_cr4(vcpu));
+ vmx_set_cr3(vcpu, cr3);
--
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