> >
> I got the same behaviour here, and it seems that the reason is 32-bit
> machines does not use the CR8 register. But the code in vmx.c makes it
> a minimum requirement as in:
>
> min = CPU_BASED_HLT_EXITING |
> CPU_BASED_CR8_LOAD_EXITING |
> CPU_BASED_CR8_STORE_EXITING |
> CPU_BASED_USE_IO_BITMAPS |
> CPU_BASED_MOV_DR_EXITING |
> CPU_BASED_USE_TSC_OFFSETING;
>
> I think the solution is to enclose the CR8 constants in a ifdef
> CONFIG_X86_64, since putting them as optional won't do the right thing
> in 64-bit (and thus, core duo), machines.
>
> I was about to post a patch for it now.
>
> Avi, if you agree with the fix, I can do it right now.
>
BTW, in case you agree, here is the patch
--
Glauber de Oliveira Costa.
"Free as in Freedom"
http://glommer.net
"The less confident you are, the more serious you have to act."
commit 2863174b39dd8768cd7922832e45ea00d5c6442c
Author: Glauber de Oliveira Costa <[EMAIL PROTECTED]>
Date: Tue Aug 14 15:51:22 2007 -0300
don't create vmcs entries for cr8 when running on 32-bit
This is because cr8 is not available on IA-32. It is just used in 64-bit mode.
The rdmsr will then report this as not present, and it will lead us to return
an -EIO.
Signed-off-by: Glauber de Oliveira Costa <[EMAIL PROTECTED]>
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 4901339..906d4fa 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -864,8 +864,10 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
return -EIO;
min = CPU_BASED_HLT_EXITING |
+#ifdef CONFIG_X86_64
CPU_BASED_CR8_LOAD_EXITING |
CPU_BASED_CR8_STORE_EXITING |
+#endif
CPU_BASED_USE_IO_BITMAPS |
CPU_BASED_MOV_DR_EXITING |
CPU_BASED_USE_TSC_OFFSETING;
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