On 10/18/2010 06:19 PM, Dave Young wrote:
> On Tue, Oct 19, 2010 at 2:47 AM, H. Peter Anvin <[email protected]> wrote:
>> On 10/18/2010 07:06 AM, Avi Kivity wrote:
>>> On 10/18/2010 03:58 PM, Dave Young wrote:
>>>>>
>>>>> Please patch hardware_setup() to show the value of
>>>>> boot_cpu_has(X86_FEATURE_NX).
>>>>
>>>> It's 0
>>>
>>> Well, that's ridiculous. Looking back at your /proc/cpuinfo:
>>>
>>>> processor : 0
>>>> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr
>>>> pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe
>>>> syscall lm constant_tsc arch_perfmon pebs bts rep_good aperfmperf pni
>>>> dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm ida dts
>>>> tpr_shadow vnmi flexpriority
>>>>
>>>> processor : 1
>>>> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr
>>>> pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe
>>>> syscall nx lm constant_tsc arch_perfmon pebs bts rep_good aperfmperf pni
>>>> dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm ida dts
>>>> tpr_shadow vnmi flexpriority
>>>
>>> processor 0 doesn't have nx.
>>>
>>> Ingo, Peter, any ideas? Where did the missing feature go?
>>>
>>
>> I don't see the original report -- in particular I can't see the kernel
>> version -- but I suspect this *might* be an instance of the same bug
>> fixed in mainline by checkin d900329e20f4476db6461752accebcf7935a8055
>> (for backporting 1dedefd1a066a795a87afca9c0236e1a94de9bf6 is also
>> needed; these both should be in -stable or on the way there.)
>
> The kernel is git version after 2.6.36-rc8, so I think the commits
> don't fix this problem.
OK. Please install msr-tools on your system, and give us the outputs of:
rdmsr -p 0 -xc 0x1a0
rdmsr -p 1 -xc 0x1a0
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
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