From: Aneesh Kumar K.V <aneesh.kumar@kernel.org>
To: linux-coco@lists.linux.dev
Cc: Ackerley Tng <ackerleytng@google.com>,
Alex Williamson <alex@shazbot.org>,
David Woodhouse <dwmw2@infradead.org>,
David Hildenbrand <david@kernel.org>,
Jason Gunthorpe <jgg@ziepe.ca>,
"Joerg Roedel (AMD)" <joro@8bytes.org>,
Kevin Tian <kevin.tian@intel.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Robin Murphy <robin.murphy@arm.com>,
Sean Christopherson <seanjc@google.com>,
Will Deacon <will@kernel.org>, Alexey Kardashevskiy <aik@amd.com>,
Xu Yilun <yilun.xu@linux.intel.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Steven Price <steven.price@arm.com>,
Fred Griffoul <griffoul@gmail.com>,
iommu@lists.linux.dev, kvm@vger.kernel.org,
patches@lists.linux.dev
Subject: Re: [RFC PATCH v3 00/13] KVM: guest_memfd: Add a common framework for device memory providers
Date: Mon, 02 Nov 2026 19:10:50 +0530 [thread overview]
Message-ID: <yq5aa4nr5p25.fsf@kernel.org> (raw)
In-Reply-To: <20261101071928.2462549-1-aneesh.kumar@kernel.org>
"Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org> writes:
> Confidential device assignment needs guest_memfd to manage device MMIO as
> well as RAM. Device resources such as PCI BARs supply PFNs directly, and
> their protected mappings need architecture-specific map and unmap
> operations.
>
> This series adds the common guest_memfd support needed by device memory
> providers. It builds on the resource-provider API [1] and the existing
> folio and RAM PFN backing support.
>
> The VFIO provider, IOMMUFD integration and Arm CCA implementation are
> available together at:
>
> https://git.gitlab.arm.com/linux-arm/linux-cca.git cca/topics/cca-da-gmem-backend
>
An updated series is available at:
https://git.gitlab.arm.com/linux-arm/linux-cca.git cca/topics/cca-da-gmem-backend-v4
Most details remain unchanged. The VFIO/PCI code has received cleanups
and updates, as summarized in the cover letter[1]. I will rebase the full
series onto 7.4-rc1 before reposting it. If you would like to review v4
before then, let me know and I can repost it.
[1]
https://git.gitlab.arm.com/linux-arm/linux-cca/-/blob/cca/topics/cca-da-gmem-backend-v4/cover.letter.gmem_vfio?ref_type=heads
-aneesh
prev parent reply other threads:[~2026-11-02 13:41 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-01 7:19 [RFC PATCH v3 00/13] KVM: guest_memfd: Add a common framework for device memory providers Aneesh Kumar K.V (Arm)
2026-11-01 7:19 ` [RFC PATCH v3 01/13] KVM: guest_memfd: Let providers prepare memory regions Aneesh Kumar K.V (Arm)
2026-11-01 7:19 ` [RFC PATCH v3 02/13] KVM: guest_memfd: Dispatch attribute conversion through backing operations Aneesh Kumar K.V (Arm)
2026-11-01 7:19 ` [RFC PATCH v3 03/13] KVM: guest_memfd: Let providers coordinate mapping changes Aneesh Kumar K.V (Arm)
2026-11-01 7:19 ` [RFC PATCH v3 04/13] KVM: guest_memfd: Dispatch revocation through backing operations Aneesh Kumar K.V (Arm)
2026-11-01 7:19 ` [RFC PATCH v3 05/13] KVM: guest_memfd: Split population by backing type Aneesh Kumar K.V (Arm)
2026-11-01 7:19 ` [RFC PATCH v3 06/13] KVM: guest_memfd: Support device-backed PFN providers Aneesh Kumar K.V (Arm)
2026-11-01 7:19 ` [RFC PATCH v3 07/13] KVM: guest_memfd: Support private/shared conversion of device memory Aneesh Kumar K.V (Arm)
2026-11-01 7:19 ` [RFC PATCH v3 08/13] KVM: guest_memfd: Track private device ranges after attribute updates Aneesh Kumar K.V (Arm)
2026-11-01 7:19 ` [RFC PATCH v3 09/13] KVM: guest_memfd: Expose device provider private state Aneesh Kumar K.V (Arm)
2026-11-01 7:19 ` [RFC PATCH v3 10/13] KVM: guest_memfd: Support range revocation of device mappings Aneesh Kumar K.V (Arm)
2026-11-01 7:19 ` [RFC PATCH v3 11/13] KVM: guest_memfd: Add shared device mmap through PFN providers Aneesh Kumar K.V (Arm)
2026-11-01 7:19 ` [RFC PATCH v3 12/13] KVM: guest_memfd: Remove device mappings on final close Aneesh Kumar K.V (Arm)
2026-11-01 7:19 ` [RFC PATCH v3 13/13] KVM: guest_memfd: Invalidate guest_memfd mappings before removing memslot bindings Aneesh Kumar K.V (Arm)
2026-11-02 13:40 ` Aneesh Kumar K.V [this message]
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