From: Jason Gunthorpe <jgg@nvidia.com>
To: Nicolin Chen <nicolinc@nvidia.com>
Cc: "Tian, Kevin" <kevin.tian@intel.com>,
"Liu, Yi L" <yi.l.liu@intel.com>,
"iommu@lists.linux.dev" <iommu@lists.linux.dev>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] iommufd: Enforce IOMMU_RESV_SW_MSI upon hwpt_paging allocation
Date: Thu, 1 Aug 2024 10:28:48 -0300 [thread overview]
Message-ID: <20240801132848.GE2809814@nvidia.com> (raw)
In-Reply-To: <ZqqBHKEJCm4XXFq5@Asurada-Nvidia>
On Wed, Jul 31, 2024 at 11:23:24AM -0700, Nicolin Chen wrote:
> > If we really want to go this route I wonder whether a per-IOMMU
> > get_resv_regions() API should first exist then there is a clear definition
> > what types are per-IOMMU and what are not.
>
> Probably it'd be necessary.
But domains can cross IOMMU's as well, it is not per-iommu you are
after but hardwired per-IOMMU driver type.
What was the issue with trying to fix this on the nesting attach side?
Jason
next prev parent reply other threads:[~2024-08-01 13:28 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-28 23:51 [PATCH] iommufd: Enforce IOMMU_RESV_SW_MSI upon hwpt_paging allocation Nicolin Chen
2024-07-29 18:24 ` Jason Gunthorpe
2024-07-29 20:05 ` Nicolin Chen
2024-07-31 7:50 ` Tian, Kevin
2024-07-31 18:23 ` Nicolin Chen
2024-08-01 13:28 ` Jason Gunthorpe [this message]
2024-08-01 17:39 ` Nicolin Chen
2024-07-31 7:45 ` Tian, Kevin
2024-07-31 18:13 ` Nicolin Chen
2024-07-31 21:21 ` Nicolin Chen
2024-08-01 8:10 ` Tian, Kevin
2024-08-01 17:40 ` Nicolin Chen
2024-08-01 14:10 ` Jason Gunthorpe
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