From: Ankit Agrawal <ankita@nvidia.com>
To: Jason Gunthorpe <jgg@nvidia.com>, David Hildenbrand <david@redhat.com>
Cc: "maz@kernel.org" <maz@kernel.org>,
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Subject: Re: [PATCH v9 6/6] KVM: arm64: Expose new KVM cap for cacheable PFNMAP
Date: Fri, 4 Jul 2025 16:20:07 +0000 [thread overview]
Message-ID: <SA1PR12MB7199AB9F09DF483AEC41777AB042A@SA1PR12MB7199.namprd12.prod.outlook.com> (raw)
In-Reply-To: <20250704150442.GI1410929@nvidia.com>
Thanks Jason and David for reviewing the patch!
>> >
>> > I don't know if any VMM will ever use this, but it looks OK
>>
>> So, should we defer it to the point where we actually have a use case?
>>
>> I mean, patch #4 could be simplified by modifying arm64 code in patch #5
>> only. No need for a common kvm_arch function etc.
>
> IDK, I think Marc and Oliver are right it makes sense to have it, I
> just don't really see how a VMM would make use of it..
>
> Jason
Right, it was also pointed out that the VMM could make use of it
for early termination during VM migration between incompatible
systems (i.e. across systems with and without FWB and CACHE DIC).
next prev parent reply other threads:[~2025-07-04 16:20 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-21 4:21 [PATCH v9 0/6] KVM: arm64: Map GPU device memory as cacheable ankita
2025-06-21 4:21 ` [PATCH v9 1/6] KVM: arm64: Rename the device variable to s2_force_noncacheable ankita
2025-07-04 13:41 ` Jason Gunthorpe
2025-07-04 13:57 ` David Hildenbrand
2025-06-21 4:21 ` [PATCH v9 2/6] KVM: arm64: Update the check to detect device memory ankita
2025-07-04 13:43 ` Jason Gunthorpe
2025-07-04 14:02 ` David Hildenbrand
2025-06-21 4:21 ` [PATCH v9 3/6] KVM: arm64: Block cacheable PFNMAP mapping ankita
2025-06-27 13:49 ` Will Deacon
2025-06-30 1:56 ` Ankit Agrawal
2025-06-30 12:25 ` Jason Gunthorpe
2025-07-04 12:21 ` David Hildenbrand
2025-07-04 16:04 ` Will Deacon
2025-07-04 16:47 ` Jason Gunthorpe
2025-07-08 12:47 ` Will Deacon
2025-07-04 13:45 ` Jason Gunthorpe
2025-07-04 14:09 ` David Hildenbrand
2025-06-21 4:21 ` [PATCH v9 4/6] KVM: arm64: New function to determine hardware cache management support ankita
2025-07-04 13:47 ` Jason Gunthorpe
2025-07-04 14:10 ` David Hildenbrand
2025-06-21 4:21 ` [PATCH v9 5/6] KVM: arm64: Allow cacheable stage 2 mapping using VMA flags ankita
2025-07-04 14:04 ` Jason Gunthorpe
2025-07-04 14:13 ` David Hildenbrand
2025-07-04 16:51 ` Ankit Agrawal
2025-06-21 4:21 ` [PATCH v9 6/6] KVM: arm64: Expose new KVM cap for cacheable PFNMAP ankita
2025-07-04 13:44 ` Jason Gunthorpe
2025-07-04 14:15 ` David Hildenbrand
2025-07-04 15:04 ` Jason Gunthorpe
2025-07-04 16:20 ` Ankit Agrawal [this message]
2025-07-04 16:56 ` Jason Gunthorpe
2025-06-27 5:03 ` [PATCH v9 0/6] KVM: arm64: Map GPU device memory as cacheable Ankit Agrawal
2025-07-02 9:33 ` Ankit Agrawal
2025-07-02 16:51 ` Donald Dutile
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