linux-kernel - Re: [PATCH v1 2/2] KVM: s390: Topology expose TOPOLOGY facility

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Message-ID: <3a7836ad-f748-296e-cd1a-a10cbc570474@redhat.com>
Date:   Thu, 15 Jul 2021 10:52:33 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Pierre Morel <pmorel@...ux.ibm.com>, kvm@...r.kernel.org
Cc:     linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        borntraeger@...ibm.com, frankja@...ux.ibm.com, cohuck@...hat.com,
        thuth@...hat.com, imbrenda@...ux.ibm.com, hca@...ux.ibm.com,
        gor@...ux.ibm.com
Subject: Re: [PATCH v1 2/2] KVM: s390: Topology expose TOPOLOGY facility

On 14.07.21 17:25, Pierre Morel wrote:
> We add the KVM extension KVM_CAP_S390_CPU_TOPOLOGY, this will
> allow the userland hypervisor to handle the interception of the
> PTF (Perform topology Function) instruction.

Ehm, no you don't add any new capability. Or my eyes are too tired to 
spot it :)

> 
> Signed-off-by: Pierre Morel <pmorel@...ux.ibm.com>
> ---
>   arch/s390/tools/gen_facilities.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/arch/s390/tools/gen_facilities.c b/arch/s390/tools/gen_facilities.c
> index 606324e56e4e..2c260eb22bae 100644
> --- a/arch/s390/tools/gen_facilities.c
> +++ b/arch/s390/tools/gen_facilities.c
> @@ -112,6 +112,7 @@ static struct facility_def facility_defs[] = {
>   
>   		.name = "FACILITIES_KVM_CPUMODEL",
>   		.bits = (int[]){
> +			11, /* configuration topology facility */
>   			12, /* AP Query Configuration Information */
>   			15, /* AP Facilities Test */
>   			156, /* etoken facility */
> 


-- 
Thanks,

David / dhildenb