From: Jason Gunthorpe <jgg@nvidia.com>
To: Nicolin Chen <nicolinc@nvidia.com>
Cc: will@kernel.org, robin.murphy@arm.com, joro@8bytes.org,
linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev,
linux-kernel@vger.kernel.org,
shameerali.kolothum.thodi@huawei.com
Subject: Re: [PATCH v1 0/4] iommu/arm-smmu-v3: Allocate vmid per vsmmu instead of s2_parent
Date: Wed, 5 Mar 2025 15:29:50 -0400 [thread overview]
Message-ID: <20250305192950.GA354511@nvidia.com> (raw)
In-Reply-To: <Z8idOr67A0EG1/PN@Asurada-Nvidia>
On Wed, Mar 05, 2025 at 10:51:38AM -0800, Nicolin Chen wrote:
> > I mean a normal S2 domain attaching to multiple devices on multiple
> > instances.
>
> Oh, I haven't thought about a !nest_parent S2 case.
>
> A nest_parent case will not allow devices to attach the S2 but
> always to a proxy nested S1 as we discussed previously. So, I
> think the implementation could be very different?
It could, and that is what you show here
But also, it could be the same implementation.
Jason
next prev parent reply other threads:[~2025-03-05 20:01 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-05 5:03 [PATCH v1 0/4] iommu/arm-smmu-v3: Allocate vmid per vsmmu instead of s2_parent Nicolin Chen
2025-03-05 5:04 ` [PATCH v1 1/4] iommu/arm-smmu-v3: Pass in vmid to arm_smmu_make_s2_domain_ste() Nicolin Chen
2025-03-05 8:50 ` Shameerali Kolothum Thodi
2025-03-05 17:44 ` Nicolin Chen
2025-04-07 8:37 ` Pranjal Shrivastava
2025-03-05 16:55 ` Jason Gunthorpe
2025-04-07 8:32 ` Pranjal Shrivastava
2025-03-05 5:04 ` [PATCH v1 2/4] iommu/arm-smmu-v3: Share arm_smmu_cmdq_issue_cmd_with_sync() with vsmmu Nicolin Chen
2025-04-07 8:43 ` Pranjal Shrivastava
2025-03-05 5:04 ` [PATCH v1 3/4] iommu/arm-smmu-v3: Decouple vmid from S2 nest_parent domain Nicolin Chen
2025-03-05 17:01 ` Jason Gunthorpe
2025-03-05 18:45 ` Nicolin Chen
2025-04-07 10:51 ` Pranjal Shrivastava
2025-04-07 16:52 ` Jason Gunthorpe
2025-04-08 14:20 ` Pranjal Shrivastava
2025-04-15 0:05 ` Nicolin Chen
2025-03-05 5:04 ` [PATCH v1 4/4] iommu/arm-smmu-v3-iommufd: Allow a shared s2_parent to allocate vSMMU Nicolin Chen
2025-03-05 9:01 ` Shameerali Kolothum Thodi
2025-03-05 16:57 ` Jason Gunthorpe
2025-03-05 17:49 ` Nicolin Chen
2025-03-05 16:54 ` [PATCH v1 0/4] iommu/arm-smmu-v3: Allocate vmid per vsmmu instead of s2_parent Jason Gunthorpe
2025-03-05 18:23 ` Nicolin Chen
2025-03-05 18:31 ` Jason Gunthorpe
2025-03-05 18:51 ` Nicolin Chen
2025-03-05 19:29 ` Jason Gunthorpe [this message]
2025-03-05 19:46 ` Nicolin Chen
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