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Message-ID: <ZELPCTOEgU8XlhFh@nvidia.com>
Date: Fri, 21 Apr 2023 14:59:37 -0300
From: Jason Gunthorpe <jgg@...dia.com>
To: Nicolin Chen <nicolinc@...dia.com>
Cc: "Tian, Kevin" <kevin.tian@...el.com>,
"alex.williamson@...hat.com" <alex.williamson@...hat.com>,
"robin.murphy@....com" <robin.murphy@....com>,
"eric.auger@...hat.com" <eric.auger@...hat.com>,
"Liu, Yi L" <yi.l.liu@...el.com>,
"baolu.lu@...ux.intel.com" <baolu.lu@...ux.intel.com>,
"will@...nel.org" <will@...nel.org>,
"joro@...tes.org" <joro@...tes.org>,
"shameerali.kolothum.thodi@...wei.com"
<shameerali.kolothum.thodi@...wei.com>,
"jean-philippe@...aro.org" <jean-philippe@...aro.org>,
"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
"iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH RFC v2 0/3] Add set_dev_data and unset_dev_data support
On Fri, Apr 21, 2023 at 10:37:22AM -0700, Nicolin Chen wrote:
> How about the following piece? Needs a test with QEMU though..
>
> static const size_t iommufd_device_data_size[] = {
> [IOMMU_HW_INFO_TYPE_NONE] = 0,
> [IOMMU_HW_INFO_TYPE_INTEL_VTD] = 0,
> [IOMMU_HW_INFO_TYPE_ARM_SMMUV3] =
> sizeof(struct iommu_device_data_arm_smmuv3),
> };
If we need more than one of these things we'll need a better
solution..
> rc = ops->set_dev_data_user(idev->dev, data);
Where will the iommu driver store the vsid to sid xarray from these
arguments?
Jason
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