From: Jason Gunthorpe <jgg@nvidia.com>
To: Nicolin Chen <nicolinc@nvidia.com>
Cc: kevin.tian@intel.com, joro@8bytes.org, will@kernel.org,
robin.murphy@arm.com, alex.williamson@redhat.com,
shuah@kernel.org, yi.l.liu@intel.com,
linux-kernel@vger.kernel.org, iommu@lists.linux.dev,
kvm@vger.kernel.org, linux-kselftest@vger.kernel.org,
mjrosato@linux.ibm.com, farman@linux.ibm.com
Subject: Re: [PATCH v4 1/5] vfio: Do not allow !ops->dma_unmap in vfio_pin/unpin_pages()
Date: Fri, 10 Mar 2023 16:14:27 -0400 [thread overview]
Message-ID: <ZAuPo6o9Qk3dlpf0@nvidia.com> (raw)
In-Reply-To: <2dc87ceb7bf02c7f405bde44e9ee9b21398c5228.1678284812.git.nicolinc@nvidia.com>
On Wed, Mar 08, 2023 at 06:25:58AM -0800, Nicolin Chen wrote:
> A driver that doesn't implement ops->dma_unmap shouldn't be allowed to do
> vfio_pin/unpin_pages(), though it can use vfio_dma_rw() to access an iova
> range. Deny !ops->dma_unmap cases in vfio_pin/unpin_pages().
>
> Suggested-by: Kevin Tian <kevin.tian@intel.com>
> Reviewed-by: Kevin Tian <kevin.tian@intel.com>
> Reviewed-by: Yi Liu <yi.l.liu@intel.com>
> Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
> ---
> drivers/vfio/vfio_main.c | 4 ++++
> 1 file changed, 4 insertions(+)
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Jason
next prev parent reply other threads:[~2023-03-10 20:14 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-08 14:25 [PATCH v4 0/5] Add IO page table replacement support Nicolin Chen
2023-03-08 14:25 ` [PATCH v4 1/5] vfio: Do not allow !ops->dma_unmap in vfio_pin/unpin_pages() Nicolin Chen
2023-03-10 20:14 ` Jason Gunthorpe [this message]
2023-03-08 14:25 ` [PATCH v4 2/5] iommufd/selftest: Add IOMMU_TEST_OP_ACCESS_SET_IOAS coverage Nicolin Chen
2023-03-10 20:15 ` Jason Gunthorpe
2023-03-11 0:06 ` Nicolin Chen
2023-03-16 5:38 ` Nicolin Chen
2023-03-08 14:26 ` [PATCH v4 3/5] iommufd: Add replace support in iommufd_access_set_ioas() Nicolin Chen
2023-03-10 11:50 ` Tian, Kevin
2023-03-08 14:26 ` [PATCH v4 4/5] iommufd/selftest: Add coverage for access->ioas replacement Nicolin Chen
2023-03-08 14:26 ` [PATCH v4 5/5] vfio: Support IO page table replacement Nicolin Chen
2023-03-10 11:53 ` Tian, Kevin
2023-03-10 23:38 ` Nicolin Chen
2023-03-13 2:04 ` Tian, Kevin
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