From: Jason Gunthorpe <jgg@ziepe.ca>
To: Mostafa Saleh <smostafa@google.com>
Cc: linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev,
linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev,
maz@kernel.org, oliver.upton@linux.dev, joey.gouly@arm.com,
suzuki.poulose@arm.com, yuzenghui@huawei.com,
catalin.marinas@arm.com, will@kernel.org, robin.murphy@arm.com,
jean-philippe@linaro.org, qperret@google.com, tabba@google.com,
mark.rutland@arm.com, praan@google.com
Subject: Re: [PATCH v3 29/29] iommu/arm-smmu-v3-kvm: Add IOMMU ops
Date: Wed, 30 Jul 2025 11:42:53 -0300 [thread overview]
Message-ID: <20250730144253.GM26511@ziepe.ca> (raw)
In-Reply-To: <20250728175316.3706196-30-smostafa@google.com>
On Mon, Jul 28, 2025 at 05:53:16PM +0000, Mostafa Saleh wrote:
> Register the SMMUv3 through IOMMU ops, that only support identity
> domains. This allows the driver to know which device are currently used
> to properly enable/disable then.
>
> Signed-off-by: Mostafa Saleh <smostafa@google.com>
> ---
> .../iommu/arm/arm-smmu-v3/arm-smmu-v3-kvm.c | 92 ++++++++++++++++++-
> 1 file changed, 91 insertions(+), 1 deletion(-)
Can you split the new iommu subysstem driver out please? I think I
asked this before.
This series is big, reviewing a new iommu driver should be done separately.
Please review all the comments for the verisilicon driver, I think
many of the remarks apply here too:
- Domain attachment looks questionable. Please do not have
attach/detach language at all in the hypervisor facing API.
- Get the ordering and APIs right so replace works. You need this to support RMRs
- Use a blocking domain not some unclear detatch idea
- Use a blocking domain for release
- Use the smmu-v3 approach for the fwspec, don't store things in the drvdata.
Jason
next prev parent reply other threads:[~2025-07-30 14:42 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-28 17:52 [PATCH v3 00/29] KVM: arm64: SMMUv3 driver for pKVM Mostafa Saleh
2025-07-28 17:52 ` [PATCH v3 01/29] KVM: arm64: Add a new function to donate memory with prot Mostafa Saleh
2025-07-28 17:52 ` [PATCH v3 02/29] KVM: arm64: Donate MMIO to the hypervisor Mostafa Saleh
2025-07-28 17:52 ` [PATCH v3 03/29] KVM: arm64: pkvm: Add pkvm_time_get() Mostafa Saleh
2025-07-28 17:52 ` [PATCH v3 04/29] iommu/io-pgtable-arm: Split the page table driver Mostafa Saleh
2025-07-28 17:52 ` [PATCH v3 05/29] iommu/io-pgtable-arm: Split initialization Mostafa Saleh
2025-07-28 17:52 ` [PATCH v3 06/29] iommu/arm-smmu-v3: Move some definitions to a new common file Mostafa Saleh
2025-07-28 17:52 ` [PATCH v3 07/29] iommu/arm-smmu-v3: Extract driver-specific bits from probe function Mostafa Saleh
2025-07-28 17:52 ` [PATCH v3 08/29] iommu/arm-smmu-v3: Move some functions to arm-smmu-v3-common.c Mostafa Saleh
2025-07-28 17:52 ` [PATCH v3 09/29] iommu/arm-smmu-v3: Move queue and table allocation " Mostafa Saleh
2025-07-28 17:52 ` [PATCH v3 10/29] iommu/arm-smmu-v3: Move firmware probe to arm-smmu-v3-common Mostafa Saleh
2025-07-28 17:52 ` [PATCH v3 11/29] iommu/arm-smmu-v3: Move IOMMU registration to arm-smmu-v3-common.c Mostafa Saleh
2025-07-28 17:52 ` [PATCH v3 12/29] iommu/arm-smmu-v3: Split cmdq code with hyp Mostafa Saleh
2025-07-28 17:53 ` [PATCH v3 13/29] iommu/arm-smmu-v3: Move TLB range invalidation into a macro Mostafa Saleh
2025-07-28 17:53 ` [PATCH v3 14/29] KVM: arm64: iommu: Introduce IOMMU driver infrastructure Mostafa Saleh
2025-07-28 17:53 ` [PATCH v3 15/29] KVM: arm64: iommu: Shadow host stage-2 page table Mostafa Saleh
2025-07-28 17:53 ` [PATCH v3 16/29] KVM: arm64: iommu: Add a memory pool Mostafa Saleh
2025-07-28 17:53 ` [PATCH v3 17/29] KVM: arm64: iommu: Add enable/disable hypercalls Mostafa Saleh
2025-07-28 17:53 ` [PATCH v3 18/29] iommu/arm-smmu-v3-kvm: Add SMMUv3 driver Mostafa Saleh
2025-07-28 17:53 ` [PATCH v3 19/29] iommu/arm-smmu-v3-kvm: Initialize registers Mostafa Saleh
2025-07-28 17:53 ` [PATCH v3 20/29] iommu/arm-smmu-v3-kvm: Setup command queue Mostafa Saleh
2025-07-29 6:44 ` Krzysztof Kozlowski
2025-07-29 9:55 ` Mostafa Saleh
2025-07-28 17:53 ` [PATCH v3 21/29] iommu/arm-smmu-v3-kvm: Setup stream table Mostafa Saleh
2025-07-28 17:53 ` [PATCH v3 22/29] iommu/arm-smmu-v3-kvm: Reset the device Mostafa Saleh
2025-07-28 17:53 ` [PATCH v3 23/29] iommu/arm-smmu-v3-kvm: Support io-pgtable Mostafa Saleh
2025-07-28 17:53 ` [PATCH v3 24/29] iommu/arm-smmu-v3-kvm: Shadow the CPU stage-2 page table Mostafa Saleh
2025-07-28 17:53 ` [PATCH v3 25/29] iommu/arm-smmu-v3-kvm: Add enable/disable device HVCs Mostafa Saleh
2025-07-28 17:53 ` [PATCH v3 26/29] iommu/arm-smmu-v3-kvm: Add host driver for pKVM Mostafa Saleh
2025-07-28 17:53 ` [PATCH v3 27/29] iommu/arm-smmu-v3-kvm: Pass a list of SMMU devices to the hypervisor Mostafa Saleh
2025-07-28 17:53 ` [PATCH v3 28/29] iommu/arm-smmu-v3-kvm: Allocate structures and reset device Mostafa Saleh
2025-07-28 17:53 ` [PATCH v3 29/29] iommu/arm-smmu-v3-kvm: Add IOMMU ops Mostafa Saleh
2025-07-30 14:42 ` Jason Gunthorpe [this message]
2025-07-30 15:07 ` Mostafa Saleh
2025-07-30 16:47 ` Jason Gunthorpe
2025-07-31 14:17 ` Mostafa Saleh
2025-07-31 16:57 ` Jason Gunthorpe
2025-07-31 17:44 ` Mostafa Saleh
2025-08-01 18:59 ` Jason Gunthorpe
2025-08-04 14:41 ` Mostafa Saleh
2025-08-05 17:57 ` Jason Gunthorpe
2025-08-06 14:10 ` Mostafa Saleh
2025-08-11 18:55 ` Jason Gunthorpe
2025-08-12 10:29 ` Mostafa Saleh
2025-08-12 12:10 ` Jason Gunthorpe
2025-08-12 12:37 ` Mostafa Saleh
2025-08-12 13:48 ` Jason Gunthorpe
2025-08-13 13:52 ` Mostafa Saleh
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