From: Manoj Vishwanathan <manojvishy@google.com>
To: Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Joerg Roedel <joro@8bytes.org>,
Alex Williamson <alex.williamson@redhat.com>,
linux-arm-kernel@lists.infradead.org
Cc: kvm@vger.kernel.org, iommu@lists.linux.dev,
linux-kernel@vger.kernel.org, David Dillow <dillow@google.com>,
Manoj Vishwanathan <manojvishy@google.com>
Subject: [PATCH v1 3/4] vfio: Add VFIO_DMA_MAP_FLAG_SYS_CACHE to control device access to system cache
Date: Mon, 26 Aug 2024 07:16:40 +0000 [thread overview]
Message-ID: <20240826071641.2691374-4-manojvishy@google.com> (raw)
In-Reply-To: <20240826071641.2691374-1-manojvishy@google.com>
This new flag allows controlling whether a device buffers should be mapped to
sys cache for mapped DMA regions.
Signed-off-by: Manoj Vishwanathan <manojvishy@google.com>
---
include/uapi/linux/vfio.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 2b68e6cdf190..494611a046d3 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -1560,6 +1560,7 @@ struct vfio_iommu_type1_dma_map {
#define VFIO_DMA_MAP_FLAG_READ (1 << 0) /* readable from device */
#define VFIO_DMA_MAP_FLAG_WRITE (1 << 1) /* writable from device */
#define VFIO_DMA_MAP_FLAG_VADDR (1 << 2)
+#define VFIO_DMA_MAP_FLAG_SYS_CACHE (1 << 6) /* Sys Cache able from device */
__u64 vaddr; /* Process virtual address */
__u64 iova; /* IO virtual address */
__u64 size; /* Size of mapping (bytes) */
--
2.46.0.295.g3b9ea8a38a-goog
next prev parent reply other threads:[~2024-08-26 7:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-26 7:16 [PATCH v1 0/4] vfio/iommu: Flag to allow userspace to set DMA buffers system cacheable Manoj Vishwanathan
2024-08-26 7:16 ` [PATCH v1 1/4] iommu: Add IOMMU_SYS_CACHE flag for system cache control Manoj Vishwanathan
2024-08-26 7:16 ` [PATCH v1 2/4] iommu/io-pgtable-arm: Force outer cache for page-level MAIR via user flag Manoj Vishwanathan
2024-08-26 7:16 ` Manoj Vishwanathan [this message]
2024-08-26 7:16 ` [PATCH v1 4/4] vfio/type1: Add support for VFIO_DMA_MAP_FLAG_SYS_CACHE Manoj Vishwanathan
2024-08-26 17:04 ` [PATCH v1 0/4] vfio/iommu: Flag to allow userspace to set DMA buffers system cacheable Alex Williamson
2024-08-26 17:36 ` Manoj Vishwanathan
2024-08-26 23:17 ` Jason Gunthorpe
2024-08-27 17:31 ` Robin Murphy
2024-08-28 2:55 ` Manoj Vishwanathan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20240826071641.2691374-4-manojvishy@google.com \
--to=manojvishy@google.com \
--cc=alex.williamson@redhat.com \
--cc=dillow@google.com \
--cc=iommu@lists.linux.dev \
--cc=joro@8bytes.org \
--cc=kvm@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=robin.murphy@arm.com \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox