From: Jason Gunthorpe <jgg@nvidia.com>
To: Eric Auger <eric.auger@redhat.com>
Cc: Nicolin Chen <nicolinc@nvidia.com>,
Shameer Kolothum <skolothumtho@nvidia.com>,
qemu-arm@nongnu.org, qemu-devel@nongnu.org,
peter.maydell@linaro.org, ddutile@redhat.com,
berrange@redhat.com, nathanc@nvidia.com, mochs@nvidia.com,
smostafa@google.com, wangzhou1@hisilicon.com,
jiangkunkun@huawei.com, jonathan.cameron@huawei.com,
zhangfei.gao@linaro.org, zhenzhong.duan@intel.com,
yi.l.liu@intel.com, shameerkolothum@gmail.com
Subject: Re: [PATCH v4 22/27] hw/arm/smmuv3-accel: Add support for ATS
Date: Tue, 28 Oct 2025 10:41:48 -0300 [thread overview]
Message-ID: <20251028134148.GH1018328@nvidia.com> (raw)
In-Reply-To: <9748e922-057b-4e7c-ad6b-b83f5591290a@redhat.com>
On Tue, Oct 28, 2025 at 02:21:32PM +0100, Eric Auger wrote:
>
>
> On 10/28/25 1:16 PM, Jason Gunthorpe wrote:
> > On Mon, Oct 27, 2025 at 10:53:10AM -0700, Nicolin Chen wrote:
> >
> >> Hmm, that sounds a legit reason, though adding the ATS support to
> >> the emulated SMMUv3 isn't seemingly a small effort...
> > What is "emulated ATS" anyhow?
> I guess it means implementing ATS translation requests and capability to
> send ATS invalidations. something like:
>
> https://lore.kernel.org/all/20250628180226.133285-1-clement.mathieu--drif@eviden.com/
Why would you even want this? The cover letter didn't explain what the
point was.
qemu emulating two levels of IOTLB caching in software, with a
software page table walk?? Why??
Jason
next prev parent reply other threads:[~2025-10-28 13:43 UTC|newest]
Thread overview: 162+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-29 13:36 [PATCH v4 00/27] hw/arm/virt: Add support for user-creatable accelerated SMMUv3 Shameer Kolothum
2025-09-29 13:36 ` [PATCH v4 01/27] backends/iommufd: Introduce iommufd_backend_alloc_viommu Shameer Kolothum
2025-09-29 15:35 ` Jonathan Cameron via
2025-10-17 12:21 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 02/27] backends/iommufd: Introduce iommufd_vdev_alloc Shameer Kolothum
2025-09-29 15:40 ` Jonathan Cameron via
2025-09-29 17:52 ` Nicolin Chen
2025-09-30 8:14 ` Shameer Kolothum
2025-09-29 13:36 ` [PATCH v4 03/27] hw/arm/smmu-common: Factor out common helper functions and export Shameer Kolothum
2025-09-29 15:43 ` Jonathan Cameron via
2025-09-29 13:36 ` [PATCH v4 04/27] hw/arm/smmu-common:Make iommu ops part of SMMUState Shameer Kolothum
2025-09-29 15:45 ` Jonathan Cameron via
2025-09-29 21:53 ` Nicolin Chen via
2025-10-01 16:11 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 05/27] hw/arm/smmuv3-accel: Introduce smmuv3 accel device Shameer Kolothum
2025-09-29 15:53 ` Jonathan Cameron via
2025-09-29 22:24 ` Nicolin Chen
2025-10-01 16:25 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 06/27] hw/arm/smmuv3-accel: Restrict accelerated SMMUv3 to vfio-pci endpoints with iommufd Shameer Kolothum
2025-09-29 16:08 ` Jonathan Cameron via
2025-09-30 8:03 ` Shameer Kolothum
2025-10-01 16:38 ` Eric Auger
2025-10-02 8:16 ` Shameer Kolothum
2025-09-30 0:11 ` Nicolin Chen
2025-10-02 7:29 ` Shameer Kolothum
2025-10-01 17:32 ` Eric Auger
2025-10-02 9:30 ` Shameer Kolothum
2025-10-17 12:47 ` Eric Auger
2025-10-17 13:15 ` Shameer Kolothum
2025-10-17 17:19 ` Eric Auger
2025-10-20 16:31 ` Eric Auger
2025-10-20 18:25 ` Nicolin Chen
2025-10-20 18:59 ` Shameer Kolothum
2025-10-21 15:28 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 07/27] hw/arm/smmuv3: Implement get_viommu_cap() callback Shameer Kolothum
2025-09-29 16:13 ` Jonathan Cameron via
2025-10-01 17:36 ` Eric Auger
2025-10-02 9:38 ` Shameer Kolothum
2025-10-02 12:31 ` Eric Auger
2025-10-02 9:39 ` Jonathan Cameron via
2025-09-29 13:36 ` [PATCH v4 08/27] hw/arm/smmuv3-accel: Add set/unset_iommu_device callback Shameer Kolothum
2025-09-29 16:25 ` Jonathan Cameron via
2025-09-30 8:13 ` Shameer Kolothum
2025-10-02 6:52 ` Eric Auger
2025-10-02 11:34 ` Shameer Kolothum
2025-10-02 16:44 ` Nicolin Chen
2025-10-02 18:35 ` Jason Gunthorpe
2025-10-17 12:06 ` Eric Auger
2025-10-27 11:56 ` Shameer Kolothum
2025-10-27 14:10 ` Eric Auger
2025-10-17 12:23 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 09/27] hw/arm/smmuv3-accel: Support nested STE install/uninstall support Shameer Kolothum
2025-09-29 16:41 ` Jonathan Cameron via
2025-10-02 10:04 ` Eric Auger
2025-10-02 12:08 ` Shameer Kolothum
2025-10-02 12:27 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 10/27] hw/arm/smmuv3-accel: Allocate a vDEVICE object for device Shameer Kolothum
2025-09-29 16:42 ` Jonathan Cameron via
2025-10-17 13:08 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 11/27] hw/pci/pci: Introduce optional get_msi_address_space() callback Shameer Kolothum
2025-09-29 16:48 ` Jonathan Cameron via
2025-10-16 22:30 ` Nicolin Chen
2025-10-20 16:14 ` Eric Auger
2025-10-20 18:00 ` Nicolin Chen
2025-10-21 16:26 ` Eric Auger
2025-10-21 18:56 ` Nicolin Chen
2025-10-22 16:25 ` Eric Auger
2025-10-22 16:56 ` Shameer Kolothum
2025-10-20 16:21 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 12/27] hw/arm/smmuv3-accel: Make use of " Shameer Kolothum
2025-09-29 16:51 ` Jonathan Cameron via
2025-10-02 7:33 ` Shameer Kolothum
2025-10-16 23:28 ` Nicolin Chen
2025-10-20 16:43 ` Eric Auger
2025-10-21 8:15 ` Shameer Kolothum
2025-10-21 16:16 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 13/27] hw/arm/smmuv3-accel: Add support to issue invalidation cmd to host Shameer Kolothum
2025-09-29 16:53 ` Jonathan Cameron via
2025-10-16 22:59 ` Nicolin Chen via
2025-10-27 10:13 ` Eric Auger
2025-10-27 12:20 ` Shameer Kolothum
2025-10-27 14:05 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 14/27] hw/arm/smmuv3-accel: Get host SMMUv3 hw info and validate Shameer Kolothum
2025-10-01 12:56 ` Jonathan Cameron via
2025-10-02 7:37 ` Shameer Kolothum
2025-10-02 9:54 ` Jonathan Cameron via
2025-10-27 10:41 ` Eric Auger
2025-10-27 12:23 ` Shameer Kolothum
2025-10-27 10:46 ` Eric Auger
2025-10-27 12:24 ` Shameer Kolothum
2025-09-29 13:36 ` [PATCH v4 15/27] acpi/gpex: Fix PCI Express Slot Information function 0 returned value Shameer Kolothum
2025-10-01 12:59 ` Jonathan Cameron via
2025-10-02 7:39 ` Shameer Kolothum
2025-10-21 15:32 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 16/27] hw/pci-host/gpex: Allow to generate preserve boot config DSM #5 Shameer Kolothum
2025-10-01 13:05 ` Jonathan Cameron via
2025-10-27 11:14 ` Eric Auger
2025-10-27 11:10 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 17/27] hw/arm/virt: Set PCI preserve_config for accel SMMUv3 Shameer Kolothum
2025-10-01 13:06 ` Jonathan Cameron via
2025-10-27 11:21 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 18/27] hw/arm/virt-acpi-build: Add IORT RMR regions to handle MSI nested binding Shameer Kolothum
2025-10-01 13:30 ` Jonathan Cameron via
2025-09-29 13:36 ` [PATCH v4 19/27] hw/arm/smmuv3-accel: Install S1 bypass hwpt on reset Shameer Kolothum
2025-10-01 13:32 ` Jonathan Cameron via
2025-10-16 23:19 ` Nicolin Chen
2025-10-20 14:22 ` Shameer Kolothum
2025-10-27 14:26 ` Eric Auger
2025-10-27 14:51 ` Shameer Kolothum
2025-10-29 4:26 ` Nicolin Chen
2025-10-27 16:34 ` Nicolin Chen
2025-10-27 14:22 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 20/27] hw/arm/smmuv3: Add accel property for SMMUv3 device Shameer Kolothum
2025-10-16 21:48 ` Nicolin Chen
2025-10-27 14:28 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 21/27] hw/arm/smmuv3-accel: Add a property to specify RIL support Shameer Kolothum
2025-10-01 13:39 ` Jonathan Cameron via
2025-10-17 8:48 ` Zhangfei Gao
2025-10-17 9:40 ` Shameer Kolothum
2025-10-17 14:05 ` Zhangfei Gao
2025-10-27 14:44 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 22/27] hw/arm/smmuv3-accel: Add support for ATS Shameer Kolothum
2025-10-01 13:43 ` Jonathan Cameron via
2025-10-27 16:59 ` Eric Auger
2025-10-27 17:13 ` Nicolin Chen via
2025-10-27 17:38 ` Eric Auger
2025-10-27 17:53 ` Nicolin Chen
2025-10-28 12:16 ` Jason Gunthorpe
2025-10-28 13:21 ` Eric Auger
2025-10-28 13:41 ` Jason Gunthorpe [this message]
2025-10-28 13:51 ` Eric Auger
2025-10-28 14:03 ` Jason Gunthorpe
2025-10-28 14:44 ` Shameer Kolothum
2025-10-28 14:46 ` Eric Auger
2025-10-28 14:59 ` Eric Auger
2025-10-28 15:06 ` Jason Gunthorpe
2025-10-27 17:54 ` Shameer Kolothum
2025-10-27 18:02 ` Eric Auger
2025-10-28 14:03 ` Shameer Kolothum
2025-10-27 17:13 ` Shameer Kolothum
2025-09-29 13:36 ` [PATCH v4 23/27] hw/arm/smmuv3-accel: Add property to specify OAS bits Shameer Kolothum
2025-10-01 13:46 ` Jonathan Cameron via
2025-10-27 14:57 ` Eric Auger
2025-10-27 14:55 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 24/27] backends/iommufd: Retrieve PASID width from iommufd_backend_get_device_info() Shameer Kolothum
2025-10-01 13:50 ` Jonathan Cameron via
2025-10-27 17:00 ` Eric Auger
2025-10-27 17:10 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 25/27] backends/iommufd: Add a callback helper to retrieve PASID support Shameer Kolothum
2025-10-01 13:52 ` Jonathan Cameron via
2025-10-27 17:28 ` Eric Auger
2025-09-29 13:36 ` [PATCH v4 26/27] vfio: Synthesize vPASID capability to VM Shameer Kolothum
2025-10-01 13:58 ` Jonathan Cameron via
2025-10-02 8:03 ` Shameer Kolothum
2025-10-02 9:58 ` Jonathan Cameron via
2025-09-29 13:36 ` [PATCH v4 27/27] hw.arm/smmuv3: Add support for PASID enable Shameer Kolothum
2025-10-01 14:01 ` Jonathan Cameron via
2025-10-27 18:15 ` Eric Auger
2025-10-27 18:40 ` Shameer Kolothum
2025-10-28 10:31 ` Eric Auger
2025-10-17 6:25 ` [PATCH v4 00/27] hw/arm/virt: Add support for user-creatable accelerated SMMUv3 Zhangfei Gao
2025-10-17 9:43 ` Shameer Kolothum
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=20251028134148.GH1018328@nvidia.com \
--to=jgg@nvidia.com \
--cc=berrange@redhat.com \
--cc=ddutile@redhat.com \
--cc=eric.auger@redhat.com \
--cc=jiangkunkun@huawei.com \
--cc=jonathan.cameron@huawei.com \
--cc=mochs@nvidia.com \
--cc=nathanc@nvidia.com \
--cc=nicolinc@nvidia.com \
--cc=peter.maydell@linaro.org \
--cc=qemu-arm@nongnu.org \
--cc=qemu-devel@nongnu.org \
--cc=shameerkolothum@gmail.com \
--cc=skolothumtho@nvidia.com \
--cc=smostafa@google.com \
--cc=wangzhou1@hisilicon.com \
--cc=yi.l.liu@intel.com \
--cc=zhangfei.gao@linaro.org \
--cc=zhenzhong.duan@intel.com \
/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;
as well as URLs for NNTP newsgroup(s).