Re: [Qemu-devel] [edk2] (PAM stuff) reset doesn't work on OVMF + SeaBIOS CSM

[Laszlo Ersek]

On 02/18/13 18:28, Laszlo Ersek wrote:
> On 02/18/13 17:48, David Woodhouse wrote:
>> On Mon, 2013-02-18 at 16:38 +0100, Paolo Bonzini wrote:
>>> Indeed the difference between CPUs is puzzling.
>>
>> Very much so. So far I have established that it works OK here:
>>
>> cpu family   : 6
>> model                : 44
>> model name   : Intel(R) Core(TM) i7 CPU       X 980  @ 3.33GHz
>> stepping     : 2
>> microcode    : 0x5
>> 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
>> pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl
>> xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx
>> est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 popcnt aes lahf_lm arat
>> dtherm tpr_shadow vnmi flexpriority ept vpid
> 
>> ... but not here:
>>
>> cpu family   : 6
>> model                : 30
>> model name   : Intel(R) Core(TM) i7 CPU         870  @ 2.93GHz
>> stepping     : 5
>> microcode    : 0x5
>> 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
>> rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology
>> nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3
>> cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm ida dtherm tpr_shadow vnmi
>> flexpriority ept vpid
> 
> Maybe related to <https://patchwork.kernel.org/patch/26836/>?


http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=3a624e2
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=046d871

Can you please compare the values of

  /sys/module/kvm_intel/parameters/unrestricted_guest

between the working & non-working hosts? On my workstation, it says "N".

Assuming it says "Y" on your "working" machines, what happens if you
flip it to "N" (or load the kvm_intel module with the
"unrestricted_guest=N" modparam)?

Thanks!
Laszlo