[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Qemu-devel] [PATCH v3] s390x/cpumodel: Set up CPU model for AQIC in

From: Christian Borntraeger
Subject: Re: [Qemu-devel] [PATCH v3] s390x/cpumodel: Set up CPU model for AQIC interception
Date: Fri, 15 Feb 2019 10:58:44 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1

On 15.02.2019 10:53, Pierre Morel wrote:
> On 14/02/2019 13:14, Pierre Morel wrote:
>> A new CPU model facilities is introduced to support AP devices
>> interruption interception for a KVM guest.
>> "APQI" for "AP-Queue Interruption" facility
>> The S390_FEAT_AP_QUEUE_INTERRUPT_CONTROL, CPU facility indicates
>> whether the PQAP instruction with the AQIC command is available
>> to the guest.
>> This feature will be enabled only if the AP instructions are
>> available on the linux host and AQIC facility is installed on
>> the host.
>> This feature must be turned on from userspace to intercept AP
>> instructions on the KVM guest. The QEMU command line to turn
>> this feature on looks something like this:
>>      qemu-system-s390x ... -cpu xxx,apqi=on ...
> Hi,
> I suddenly have a very big doubt on this QEMU patch.
> Older Linux advertise PQAP/AQIC feature (65)

Which Linuxes advertise PQAP/AQIC (stfle.65)?
This was never advertised by any previous Linux as far as I can tell.

reply via email to

[Prev in Thread] Current Thread [Next in Thread]