From: Jason Gunthorpe <jgg@nvidia.com>
To: Michael Shavit <mshavit@google.com>
Cc: iommu@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, will@kernel.org,
nicolinc@nvidia.com, tina.zhang@intel.com,
jean-philippe@linaro.org, robin.murphy@arm.com
Subject: Re: [RFC PATCH v1 3/8] iommu/arm-smmu-v3-sva: Allocate new ASID from installed_smmus
Date: Thu, 17 Aug 2023 15:38:35 -0300 [thread overview]
Message-ID: <ZN5pK03Drao/egeF@nvidia.com> (raw)
In-Reply-To: <20230818021629.RFC.v1.3.I326c62dc062aed8d901d319aa665dbe983c7904c@changeid>
On Fri, Aug 18, 2023 at 02:16:25AM +0800, Michael Shavit wrote:
> Pick an ASID that is within the supported range of all SMMUs that the
> domain is installed to.
>
> Signed-off-by: Michael Shavit <mshavit@google.com>
> ---
This seems like a pretty niche scenario, maybe we should just keep a
global for the max ASID?
Otherwise we need a code to change the ASID, even for non-SVA domains,
when the domain is installed in different devices if the current ASID
is over the instance max..
Ideally domain ASID would be selected at domain allocation time.
Jason
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next prev parent reply other threads:[~2023-08-17 18:39 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-17 18:16 [RFC PATCH v1 0/8] Install domain onto multiple smmus Michael Shavit
2023-08-17 18:16 ` [RFC PATCH v1 1/8] iommu/arm-smmu-v3: Add list of installed_smmus Michael Shavit
2023-08-17 19:05 ` Jason Gunthorpe
2023-08-17 19:34 ` Robin Murphy
2023-08-18 5:34 ` Michael Shavit
2023-08-17 18:16 ` [RFC PATCH v1 2/8] iommu/arm-smmu-v3: Perform invalidations over installed_smmus Michael Shavit
2023-08-17 19:20 ` Jason Gunthorpe
2023-08-17 19:41 ` Robin Murphy
2023-08-18 3:44 ` Michael Shavit
2023-08-18 13:51 ` Jason Gunthorpe
2023-08-21 8:33 ` Michael Shavit
2023-08-21 11:57 ` Jason Gunthorpe
2023-08-22 8:17 ` Michael Shavit
2023-08-22 8:21 ` Michael Shavit
2023-08-22 10:10 ` Michael Shavit
2023-08-22 14:15 ` Jason Gunthorpe
2023-08-17 18:16 ` [RFC PATCH v1 3/8] iommu/arm-smmu-v3-sva: Allocate new ASID from installed_smmus Michael Shavit
2023-08-17 18:38 ` Jason Gunthorpe [this message]
2023-08-21 9:31 ` Michael Shavit
2023-08-21 11:54 ` Jason Gunthorpe
2023-08-21 13:38 ` Michael Shavit
2023-08-21 13:50 ` Jason Gunthorpe
2023-08-21 14:16 ` Michael Shavit
2023-08-21 14:26 ` Jason Gunthorpe
2023-08-21 14:39 ` Michael Shavit
2023-08-21 14:56 ` Jason Gunthorpe
2023-08-22 8:53 ` Michael Shavit
2023-08-17 18:16 ` [RFC PATCH v1 4/8] iommu/arm-smmu-v3: check smmu compatibility on attach Michael Shavit
2023-08-17 19:16 ` Robin Murphy
2023-08-18 3:14 ` Michael Shavit
2023-08-17 18:16 ` [RFC PATCH v1 5/8] iommu/arm-smmu-v3: Add arm_smmu_device as a parameter to domain_finalise Michael Shavit
2023-08-17 18:16 ` [RFC PATCH v1 6/8] iommu/arm-smmu-v3: Free VMID when uninstalling domain from SMMU Michael Shavit
2023-08-17 18:50 ` Jason Gunthorpe
2023-08-17 18:16 ` [RFC PATCH v1 7/8] iommu/arm-smmu-v3: check for domain initialization using pgtbl_ops Michael Shavit
2023-08-17 18:16 ` [RFC PATCH v1 8/8] iommu/arm-smmu-v3: allow multi-SMMU domain installs Michael Shavit
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