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From: Jason Gunthorpe <jgg@ziepe.ca>
To: Mostafa Saleh <smostafa@google.com>
Cc: Nicolin Chen <nicolinc@nvidia.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev,
	iommu@lists.linux.dev, catalin.marinas@arm.com, will@kernel.org,
	maz@kernel.org, oliver.upton@linux.dev, joey.gouly@arm.com,
	suzuki.poulose@arm.com, yuzenghui@huawei.com, joro@8bytes.org,
	mark.rutland@arm.com, qperret@google.com, tabba@google.com,
	vdonnefort@google.com, sebastianene@google.com, keirf@google.com
Subject: Re: [PATCH v8 11/25] iommu/arm-smmu-v3-kvm: Add the kernel driver
Date: Wed, 23 Sep 2026 14:22:07 -0300	[thread overview]
Message-ID: <20260923172207.GL1540250@ziepe.ca> (raw)
In-Reply-To: <arQHamIHuaUqlJyy@google.com>

On Wed, Sep 23, 2026 at 05:07:54PM +0000, Mostafa Saleh wrote:
> On Wed, Sep 23, 2026 at 12:55:07PM -0300, Jason Gunthorpe wrote:
> > On Wed, Sep 23, 2026 at 11:52:36AM +0000, Mostafa Saleh wrote:
> > > I can add more info in the cover letter about the code split. Mainly:
> > > - arm-smmu-v3-kvm.c: Is the kernel driver for KVM SMMUv3 (this runs in
> > >   EL1 and can use all the kernel functions).
> > >   The main job of this driver is for discovery, it doesn't do anything
> > >   else in the runtime.
> > 
> > Maybe call this el1 stub or something like that?
> > 
> > guest_pkvm_stub.c
> > pkvm/hyp.c
> > 
> 
> It is not really a stub and I was following the convention of
> arm-smmu-v3-(iommufd/test/sva) I think for the pkvm/ one it can be:
> - pkvm/arm-smmu-v3-pkvm.c
> - pkvm/arm-smmu-v3-nested.c
> - pkvm/arm-smmu-v3-el2.c
> - pkvm/arm-smmu-v3-hyp.c

pkvm/arm-smmu-v3-hyp.c reads well to me

> All of those are fine and for the other one:
> - arm-smmu-v3-{pkvm, nested, el2, hyp}-init.c
> - arm-smmu-v3-pkvm-el1.c
> 
> Anything along this lines, otherwise it's too vague IMHO.

arm-smmu-v3-pkvm-init.c seems clear?

Linus has complained about the stuttering before, so think about it..

Jason

  reply	other threads:[~2026-09-23 17:22 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-22 13:12 [PATCH v8 00/25] KVM: arm64: SMMUv3 driver for pKVM (trap and emulate) Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 01/25] KVM: arm64: Donate MMIO to the hypervisor Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 02/25] iommu/arm-smmu-v3: Move Queue and STE functions to header Mostafa Saleh
2026-09-22 18:23   ` Nicolin Chen
2026-09-22 13:12 ` [PATCH v8 03/25] iommu/arm-smmu-v3: Introduce RangeInval encoding helpers Mostafa Saleh
2026-09-22 18:45   ` Nicolin Chen
2026-09-22 13:12 ` [PATCH v8 04/25] iommu/arm-smmu-v3: Move IDR parsing to common functions Mostafa Saleh
2026-09-22 19:45   ` Nicolin Chen
2026-09-22 21:48     ` Jason Gunthorpe
2026-09-23 10:13       ` Mostafa Saleh
2026-09-23 11:55         ` Jason Gunthorpe
2026-09-23 12:21           ` Mostafa Saleh
2026-09-23 10:09     ` Mostafa Saleh
2026-09-23 11:52       ` Jason Gunthorpe
2026-09-23 12:18         ` Mostafa Saleh
2026-09-23 12:34           ` Jason Gunthorpe
2026-09-22 13:12 ` [PATCH v8 05/25] iommu/arm-smmu-v3: Move hitless machinery to common code Mostafa Saleh
2026-09-22 19:59   ` Nicolin Chen
2026-09-23 10:15     ` Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 06/25] KVM: arm64: iommu: Introduce IOMMU driver infrastructure Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 07/25] KVM: arm64: iommu: Shadow host stage-2 page table Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 08/25] KVM: arm64: iommu: Add memory pool Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 09/25] KVM: arm64: iommu: Support DABT for IOMMU Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 10/25] iommu/arm-smmu-v3-kvm: Add SMMUv3 driver Mostafa Saleh
2026-09-22 22:39   ` Nicolin Chen
2026-09-23 10:30     ` Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 11/25] iommu/arm-smmu-v3-kvm: Add the kernel driver Mostafa Saleh
2026-09-23  0:22   ` Nicolin Chen
2026-09-23 11:52     ` Mostafa Saleh
2026-09-23 15:55       ` Jason Gunthorpe
2026-09-23 17:07         ` Mostafa Saleh
2026-09-23 17:22           ` Jason Gunthorpe [this message]
2026-09-22 13:12 ` [PATCH v8 12/25] iommu/arm-smmu-v3-kvm: Probe SMMU HW Mostafa Saleh
2026-09-23  1:43   ` Nicolin Chen
2026-09-23 12:03     ` Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 13/25] iommu/arm-smmu-v3-kvm: Add MMIO emulation Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 14/25] iommu/arm-smmu-v3-kvm: Shadow the command queue Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 15/25] iommu/arm-smmu-v3-kvm: Add CMDQ functions Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 16/25] iommu/arm-smmu-v3-kvm: Emulate CMDQ for host Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 17/25] iommu/arm-smmu-v3-kvm: Shadow stream table Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 18/25] iommu/arm-smmu-v3-kvm: Shadow STEs Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 19/25] iommu/arm-smmu-v3-kvm: Share other queues Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 20/25] iommu/arm-smmu-v3-kvm: Emulate GBPA Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 21/25] iommu/io-pgtable-arm: Support io-pgtable-arm in the hypervisor Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 22/25] iommu/arm-smmu-v3-kvm: Shadow the CPU stage-2 page table Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 23/25] iommu/arm-smmu-v3-kvm: Invalidate the SMMU TLBs Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 24/25] iommu/arm-smmu-v3-kvm: Enable nesting Mostafa Saleh
2026-09-22 13:12 ` [PATCH v8 25/25] KVM: arm64: Add documentation for pKVM DMA isolation Mostafa Saleh
2026-09-22 18:07 ` [PATCH v8 00/25] KVM: arm64: SMMUv3 driver for pKVM (trap and emulate) Nicolin Chen
2026-09-23  8:52   ` Mostafa Saleh

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