On 10/02/18 15:27, Anthony PERARD wrote:
> On Tue, Oct 02, 2018 at 04:17:25PM +0400, [email protected] wrote:
>> From: Marc-AndrĂ© Lureau <[email protected]>
>>
>> This is for conformance with the TCG "Platform Reset Attack Mitigation
>> Specification". Because clearing the CPU caches at boot doesn't impact
>> performance significantly, do it unconditionally, for simplicity's
>> sake.
>>
>> Flush the cache on all logical processors, thanks to
>> EFI_PEI_MP_SERVICES_PPI and CacheMaintenanceLib.
>>
>> Cc: Jordan Justen <[email protected]>
>> Cc: Laszlo Ersek <[email protected]>
>> Cc: Ard Biesheuvel <[email protected]>
>> Cc: Anthony Perard <[email protected]>
>> Cc: Julien Grall <[email protected]>
>> Contributed-under: TianoCore Contribution Agreement 1.1
>> Signed-off-by: Marc-AndrĂ© Lureau <[email protected]>
> 
> That patch works for me on Xen. I can still boot guests with the patch
> applied, with either 1 or 4 vcpus assigned to the guest:
> 
> Tested-by: Anthony PERARD <[email protected]>

Thanks a lot!
Laszlo
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