From: Jason Gunthorpe <jgg@nvidia.com>
To: Nicolin Chen <nicolinc@nvidia.com>
Cc: "Tian, Kevin" <kevin.tian@intel.com>,
"joro@8bytes.org" <joro@8bytes.org>,
"suravee.suthikulpanit@amd.com" <suravee.suthikulpanit@amd.com>,
"will@kernel.org" <will@kernel.org>,
"robin.murphy@arm.com" <robin.murphy@arm.com>,
"sven@kernel.org" <sven@kernel.org>,
"j@jannau.net" <j@jannau.net>,
"jean-philippe@linaro.org" <jean-philippe@linaro.org>,
"robin.clark@oss.qualcomm.com" <robin.clark@oss.qualcomm.com>,
"dwmw2@infradead.org" <dwmw2@infradead.org>,
"baolu.lu@linux.intel.com" <baolu.lu@linux.intel.com>,
"yong.wu@mediatek.com" <yong.wu@mediatek.com>,
"matthias.bgg@gmail.com" <matthias.bgg@gmail.com>,
"angelogioacchino.delregno@collabora.com"
<angelogioacchino.delregno@collabora.com>,
"tjeznach@rivosinc.com" <tjeznach@rivosinc.com>,
"pjw@kernel.org" <pjw@kernel.org>,
"palmer@dabbelt.com" <palmer@dabbelt.com>,
"aou@eecs.berkeley.edu" <aou@eecs.berkeley.edu>,
"heiko@sntech.de" <heiko@sntech.de>,
"schnelle@linux.ibm.com" <schnelle@linux.ibm.com>,
"mjrosato@linux.ibm.com" <mjrosato@linux.ibm.com>,
"wens@csie.org" <wens@csie.org>,
"jernej.skrabec@gmail.com" <jernej.skrabec@gmail.com>,
"samuel@sholland.org" <samuel@sholland.org>,
"thierry.reding@gmail.com" <thierry.reding@gmail.com>,
"jonathanh@nvidia.com" <jonathanh@nvidia.com>,
"iommu@lists.linux.dev" <iommu@lists.linux.dev>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"asahi@lists.linux.dev" <asahi@lists.linux.dev>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-arm-msm@vger.kernel.org" <linux-arm-msm@vger.kernel.org>,
"linux-mediatek@lists.infradead.org"
<linux-mediatek@lists.infradead.org>,
"linux-riscv@lists.infradead.org"
<linux-riscv@lists.infradead.org>,
"linux-rockchip@lists.infradead.org"
<linux-rockchip@lists.infradead.org>,
"linux-s390@vger.kernel.org" <linux-s390@vger.kernel.org>,
"linux-sunxi@lists.linux.dev" <linux-sunxi@lists.linux.dev>,
"linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>,
"virtualization@lists.linux.dev" <virtualization@lists.linux.dev>,
"patches@lists.linux.dev" <patches@lists.linux.dev>
Subject: Re: [PATCH v1 02/20] iommu: Introduce a test_dev domain op and an internal helper
Date: Mon, 3 Nov 2025 14:54:00 -0400 [thread overview]
Message-ID: <20251103185400.GA1537560@nvidia.com> (raw)
In-Reply-To: <aQO//+6/B/WbdK2h@Asurada-Nvidia>
On Thu, Oct 30, 2025 at 12:43:59PM -0700, Nicolin Chen wrote:
> FWIW, I am thinking of another design based on Jason's remarks:
> https://lore.kernel.org/linux-iommu/aQBopHFub8wyQh5C@Asurada-Nvidia/
>
> So, instead of core initiating the round trip between the blocking
> domain and group->domain, it forwards dev_reset_prepare/done to the
> driver where it does a low-level attachment that wouldn't fail:
> For SMMUv3, it's an STE update.
> For intel_iommu, it seems to be the context table update?
Kevin, how bad do you think the UAPI issue is if we ignore it?
Jason
WARNING: multiple messages have this Message-ID (diff)
From: Jason Gunthorpe <jgg@nvidia.com>
To: Nicolin Chen <nicolinc@nvidia.com>
Cc: "Tian, Kevin" <kevin.tian@intel.com>,
"joro@8bytes.org" <joro@8bytes.org>,
"suravee.suthikulpanit@amd.com" <suravee.suthikulpanit@amd.com>,
"will@kernel.org" <will@kernel.org>,
"robin.murphy@arm.com" <robin.murphy@arm.com>,
"sven@kernel.org" <sven@kernel.org>,
"j@jannau.net" <j@jannau.net>,
"jean-philippe@linaro.org" <jean-philippe@linaro.org>,
"robin.clark@oss.qualcomm.com" <robin.clark@oss.qualcomm.com>,
"dwmw2@infradead.org" <dwmw2@infradead.org>,
"baolu.lu@linux.intel.com" <baolu.lu@linux.intel.com>,
"yong.wu@mediatek.com" <yong.wu@mediatek.com>,
"matthias.bgg@gmail.com" <matthias.bgg@gmail.com>,
"angelogioacchino.delregno@collabora.com"
<angelogioacchino.delregno@collabora.com>,
"tjeznach@rivosinc.com" <tjeznach@rivosinc.com>,
"pjw@kernel.org" <pjw@kernel.org>,
"palmer@dabbelt.com" <palmer@dabbelt.com>,
"aou@eecs.berkeley.edu" <aou@eecs.berkeley.edu>,
"heiko@sntech.de" <heiko@sntech.de>,
"schnelle@linux.ibm.com" <schnelle@linux.ibm.com>,
"mjrosato@linux.ibm.com" <mjrosato@linux.ibm.com>,
"wens@csie.org" <wens@csie.org>,
"jernej.skrabec@gmail.com" <jernej.skrabec@gmail.com>,
"samuel@sholland.org" <samuel@sholland.org>,
"thierry.reding@gmail.com" <thierry.reding@gmail.com>,
"jonathanh@nvidia.com" <jonathanh@nvidia.com>,
"iommu@lists.linux.dev" <iommu@lists.linux.dev>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"asahi@lists.linux.dev" <asahi@lists.linux.dev>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-arm-msm@vger.kernel.org" <linux-arm-msm@vger.kernel.org>,
"linux-mediatek@lists.infradead.org"
<linux-mediatek@lists.infradead.org>,
"linux-riscv@lists.infradead.org"
<linux-riscv@lists.infradead.org>,
"linux-rockchip@lists.infradead.org"
<linux-rockchip@lists.infradead.org>,
"linux-s390@vger.kernel.org" <linux-s390@vger.kernel.org>,
"linux-sunxi@lists.linux.dev" <linux-sunxi@lists.linux.dev>,
"linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>,
"virtualization@lists.linux.dev" <virtualization@lists.linux.dev>,
"patches@lists.linux.dev" <patches@lists.linux.dev>
Subject: Re: [PATCH v1 02/20] iommu: Introduce a test_dev domain op and an internal helper
Date: Mon, 3 Nov 2025 14:54:00 -0400 [thread overview]
Message-ID: <20251103185400.GA1537560@nvidia.com> (raw)
In-Reply-To: <aQO//+6/B/WbdK2h@Asurada-Nvidia>
On Thu, Oct 30, 2025 at 12:43:59PM -0700, Nicolin Chen wrote:
> FWIW, I am thinking of another design based on Jason's remarks:
> https://lore.kernel.org/linux-iommu/aQBopHFub8wyQh5C@Asurada-Nvidia/
>
> So, instead of core initiating the round trip between the blocking
> domain and group->domain, it forwards dev_reset_prepare/done to the
> driver where it does a low-level attachment that wouldn't fail:
> For SMMUv3, it's an STE update.
> For intel_iommu, it seems to be the context table update?
Kevin, how bad do you think the UAPI issue is if we ignore it?
Jason
_______________________________________________
Linux-rockchip mailing list
Linux-rockchip@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-rockchip
WARNING: multiple messages have this Message-ID (diff)
From: Jason Gunthorpe <jgg@nvidia.com>
To: Nicolin Chen <nicolinc@nvidia.com>
Cc: "Tian, Kevin" <kevin.tian@intel.com>,
"joro@8bytes.org" <joro@8bytes.org>,
"suravee.suthikulpanit@amd.com" <suravee.suthikulpanit@amd.com>,
"will@kernel.org" <will@kernel.org>,
"robin.murphy@arm.com" <robin.murphy@arm.com>,
"sven@kernel.org" <sven@kernel.org>,
"j@jannau.net" <j@jannau.net>,
"jean-philippe@linaro.org" <jean-philippe@linaro.org>,
"robin.clark@oss.qualcomm.com" <robin.clark@oss.qualcomm.com>,
"dwmw2@infradead.org" <dwmw2@infradead.org>,
"baolu.lu@linux.intel.com" <baolu.lu@linux.intel.com>,
"yong.wu@mediatek.com" <yong.wu@mediatek.com>,
"matthias.bgg@gmail.com" <matthias.bgg@gmail.com>,
"angelogioacchino.delregno@collabora.com"
<angelogioacchino.delregno@collabora.com>,
"tjeznach@rivosinc.com" <tjeznach@rivosinc.com>,
"pjw@kernel.org" <pjw@kernel.org>,
"palmer@dabbelt.com" <palmer@dabbelt.com>,
"aou@eecs.berkeley.edu" <aou@eecs.berkeley.edu>,
"heiko@sntech.de" <heiko@sntech.de>,
"schnelle@linux.ibm.com" <schnelle@linux.ibm.com>,
"mjrosato@linux.ibm.com" <mjrosato@linux.ibm.com>,
"wens@csie.org" <wens@csie.org>,
"jernej.skrabec@gmail.com" <jernej.skrabec@gmail.com>,
"samuel@sholland.org" <samuel@sholland.org>,
"thierry.reding@gmail.com" <thierry.reding@gmail.com>,
"jonathanh@nvidia.com" <jonathanh@nvidia.com>,
"iommu@lists.linux.dev" <iommu@lists.linux.dev>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"asahi@lists.linux.dev" <asahi@lists.linux.dev>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-arm-msm@vger.kernel.org" <linux-arm-msm@vger.kernel.org>,
"linux-mediatek@lists.infradead.org"
<linux-mediatek@lists.infradead.org>,
"linux-riscv@lists.infradead.org"
<linux-riscv@lists.infradead.org>,
"linux-rockchip@lists.infradead.org"
<linux-rockchip@lists.infradead.org>,
"linux-s390@vger.kernel.org" <linux-s390@vger.kernel.org>,
"linux-sunxi@lists.linux.dev" <linux-sunxi@lists.linux.dev>,
"linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>,
"virtualization@lists.linux.dev" <virtualization@lists.linux.dev>,
"patches@lists.linux.dev" <patches@lists.linux.dev>
Subject: Re: [PATCH v1 02/20] iommu: Introduce a test_dev domain op and an internal helper
Date: Mon, 3 Nov 2025 14:54:00 -0400 [thread overview]
Message-ID: <20251103185400.GA1537560@nvidia.com> (raw)
In-Reply-To: <aQO//+6/B/WbdK2h@Asurada-Nvidia>
On Thu, Oct 30, 2025 at 12:43:59PM -0700, Nicolin Chen wrote:
> FWIW, I am thinking of another design based on Jason's remarks:
> https://lore.kernel.org/linux-iommu/aQBopHFub8wyQh5C@Asurada-Nvidia/
>
> So, instead of core initiating the round trip between the blocking
> domain and group->domain, it forwards dev_reset_prepare/done to the
> driver where it does a low-level attachment that wouldn't fail:
> For SMMUv3, it's an STE update.
> For intel_iommu, it seems to be the context table update?
Kevin, how bad do you think the UAPI issue is if we ignore it?
Jason
_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
next prev parent reply other threads:[~2025-11-03 18:54 UTC|newest]
Thread overview: 129+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-13 0:04 [PATCH v1 00/20] iommu: Introduce and roll out test_dev domain op Nicolin Chen
2025-10-13 0:04 ` Nicolin Chen
2025-10-13 0:04 ` Nicolin Chen
2025-10-13 0:04 ` [PATCH v1 01/20] iommu: Lock group->mutex in iommu_deferred_attach() Nicolin Chen
2025-10-13 0:04 ` Nicolin Chen
2025-10-13 0:04 ` Nicolin Chen
2025-10-13 0:04 ` [PATCH v1 02/20] iommu: Introduce a test_dev domain op and an internal helper Nicolin Chen
2025-10-13 0:04 ` Nicolin Chen
2025-10-13 0:04 ` Nicolin Chen
2025-10-13 9:53 ` Niklas Schnelle
2025-10-13 9:53 ` Niklas Schnelle
2025-10-13 9:53 ` Niklas Schnelle
2025-10-13 17:22 ` Nicolin Chen
2025-10-13 17:22 ` Nicolin Chen
2025-10-13 17:22 ` Nicolin Chen
2025-10-14 14:20 ` Niklas Schnelle
2025-10-14 14:20 ` Niklas Schnelle
2025-10-14 14:20 ` Niklas Schnelle
2025-10-20 16:27 ` Jason Gunthorpe
2025-10-20 16:27 ` Jason Gunthorpe
2025-10-20 16:27 ` Jason Gunthorpe
2025-10-20 18:51 ` Nicolin Chen
2025-10-20 18:51 ` Nicolin Chen
2025-10-20 18:51 ` Nicolin Chen
2025-10-27 23:23 ` Jason Gunthorpe
2025-10-27 23:23 ` Jason Gunthorpe
2025-10-27 23:23 ` Jason Gunthorpe
2025-10-28 4:37 ` Nicolin Chen
2025-10-28 4:37 ` Nicolin Chen
2025-10-28 4:37 ` Nicolin Chen
2025-10-27 23:18 ` Nicolin Chen
2025-10-27 23:18 ` Nicolin Chen
2025-10-27 23:18 ` Nicolin Chen
2025-10-30 8:47 ` Tian, Kevin
2025-10-30 8:47 ` Tian, Kevin
2025-10-30 8:47 ` Tian, Kevin
2025-10-30 19:43 ` Nicolin Chen
2025-10-30 19:43 ` Nicolin Chen
2025-10-30 19:43 ` Nicolin Chen
2025-11-03 18:54 ` Jason Gunthorpe [this message]
2025-11-03 18:54 ` Jason Gunthorpe
2025-11-03 18:54 ` Jason Gunthorpe
2025-11-05 6:57 ` Tian, Kevin
2025-11-05 6:57 ` Tian, Kevin
2025-11-05 6:57 ` Tian, Kevin
2025-11-05 18:18 ` Nicolin Chen
2025-11-05 18:18 ` Nicolin Chen
2025-11-05 18:18 ` Nicolin Chen
2025-11-07 18:54 ` Jason Gunthorpe
2025-11-07 18:54 ` Jason Gunthorpe
2025-11-07 18:54 ` Jason Gunthorpe
2025-11-07 18:58 ` Nicolin Chen
2025-11-07 18:58 ` Nicolin Chen
2025-11-07 18:58 ` Nicolin Chen
2025-10-13 0:05 ` [PATCH v1 03/20] iommu/arm-smmu-v3: Implement arm_smmu_domain_test_dev Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-20 16:32 ` Jason Gunthorpe
2025-10-20 16:32 ` Jason Gunthorpe
2025-10-20 16:32 ` Jason Gunthorpe
2025-10-20 20:08 ` Nicolin Chen
2025-10-20 20:08 ` Nicolin Chen
2025-10-20 20:08 ` Nicolin Chen
2025-10-27 23:26 ` Jason Gunthorpe
2025-10-27 23:26 ` Jason Gunthorpe
2025-10-27 23:26 ` Jason Gunthorpe
2025-10-28 6:54 ` Nicolin Chen
2025-10-28 6:54 ` Nicolin Chen
2025-10-28 6:54 ` Nicolin Chen
2025-10-13 0:05 ` [PATCH v1 04/20] iommu/intel: Implement test_dev callbacks to domain ops Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` [PATCH v1 05/20] iommu/amd: " Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` [PATCH v1 06/20] iommu/arm-smmu: Implement arm_smmu_test_dev Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` [PATCH v1 07/20] iommu/qcom_iommu: Implement test_dev callbacks to domain ops Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` [PATCH v1 08/20] iommu/riscv: Implement riscv_iommu_test_paging_domain Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` [PATCH v1 09/20] iommu/mkt_iommu: Implement mtk_iommu_test_device Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` [PATCH v1 10/20] iommu/apple-dart: Implement test_dev callbacks to domain ops Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` [PATCH v1 11/20] iommu/ipmmu-vmsa: Implement ipmmu_domain_test_device Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` [PATCH v1 12/20] iommu/sun50i-iommu: Implement sun50i_iommu_domain_test_device Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` [PATCH v1 13/20] iommu/rockchip-iommu: Implement rk_iommu_identity_test_dev Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` [PATCH v1 14/20] iommu/msm_iommu: Implement msm_iommu_domain_test_dev Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` [PATCH v1 15/20] iommu/fsl_pamu_domain: Implement fsl_pamu_domain_test_device Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-15 22:02 ` Nicolin Chen
2025-10-15 22:02 ` Nicolin Chen
2025-10-15 22:02 ` Nicolin Chen
2025-10-13 0:05 ` [PATCH v1 16/20] iommu/omap-iommu: Implement omap_iommu_domain_test_dev Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` [PATCH v1 17/20] iommu/s390-iommu: Implement s390_iommu_domain_test_device Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 9:59 ` Niklas Schnelle
2025-10-13 9:59 ` Niklas Schnelle
2025-10-13 9:59 ` Niklas Schnelle
2025-10-13 0:05 ` [PATCH v1 18/20] iommufd/selftest: Implement mock_domain_nop_test Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` [PATCH v1 19/20] iommu/virtio-iommu: Implement viommu_domain_test_dev Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` [PATCH v1 20/20] iommu/tegra-smmu: Implement tegra_smmu_domain_test_dev Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-13 0:05 ` Nicolin Chen
2025-10-20 16:24 ` [PATCH v1 00/20] iommu: Introduce and roll out test_dev domain op Jason Gunthorpe
2025-10-20 16:24 ` Jason Gunthorpe
2025-10-20 16:24 ` Jason Gunthorpe
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