From: sashiko-bot@kernel.org
To: "Nicolin Chen" <nicolinc@nvidia.com>
Cc: linux-pci@vger.kernel.org
Subject: Re: [PATCH v4 11/15] iommu/arm-smmu-v3: Discard partial PRI faults on PRIQ overflow
Date: Thu, 10 Sep 2026 23:33:41 +0000 [thread overview]
Message-ID: <20260910233341.8F8BA1F0089E@smtp.kernel.org> (raw)
In-Reply-To: <1c274d8836e59c549130170d5794d22e9b8c7d7a.1789081084.git.nicolinc@nvidia.com>
> On PRIQ overflow, partial requests stored via report_partial_fault() whose
> LAST-page entry was lost stay in iopf_param->partial. Drop them by calling
> iopf_queue_discard_partial(), matching intel-iommu's handling.
>
> Do it only after the queue is fully drained, since the visible entries all
> precede the loss point: a group whose LAST-page entry is still in the queue
> gets assembled before the discard, rather than losing its stored partials
> to it.
>
> Nothing can arrive in between, as an active overflow inhibits new entries
> from being written to the PRI queue until a final CONS write acknowledges
> it (IHI0070 8.1).
>
> Suggested-by: Harsha Vardhan V <harsha.v@oss.qualcomm.com>
> Assisted-by: Claude:claude-sonnet-5
> Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/cover.1789081084.git.nicolinc@nvidia.com?part=11
next prev parent reply other threads:[~2026-09-10 23:33 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-10 23:16 [PATCH v4 00/15] iommu/arm-smmu-v3: Add PRI support Nicolin Chen
2026-09-10 23:16 ` [PATCH v4 01/15] iommu/arm-smmu-v3: Disable the impl before disabling the SMMU on shutdown Nicolin Chen
2026-09-10 23:32 ` sashiko-bot
2026-09-11 0:14 ` Jonathan Cameron
2026-09-11 23:17 ` Nicolin Chen
2026-09-10 23:16 ` [PATCH v4 02/15] iommu/arm-smmu-v3: Add arm_smmu_attach_release() Nicolin Chen
2026-09-10 23:28 ` sashiko-bot
2026-09-11 0:14 ` Jonathan Cameron
2026-09-10 23:16 ` [PATCH v4 03/15] iommu/arm-smmu-v3: Add Q_POS() macro Nicolin Chen
2026-09-10 23:21 ` sashiko-bot
2026-09-10 23:16 ` [PATCH v4 04/15] iommu/arm-smmu-v3: Drain in-flight fault events on domain detach Nicolin Chen
2026-09-10 23:31 ` sashiko-bot
2026-09-11 0:14 ` Jonathan Cameron
2026-09-10 23:16 ` [PATCH v4 05/15] iommu/arm-smmu-v3: Flush in-flight fault work " Nicolin Chen
2026-09-10 23:35 ` sashiko-bot
2026-09-11 0:14 ` Jonathan Cameron
2026-09-10 23:16 ` [PATCH v4 06/15] iommu/arm-smmu-v3: Allocate IOPF queue without FEAT_SVA Nicolin Chen
2026-09-10 23:28 ` sashiko-bot
2026-09-10 23:16 ` [PATCH v4 07/15] iommu/arm-smmu-v3: Submit CMDQ_OP_PRI_RESP for IOPF event Nicolin Chen
2026-09-10 23:36 ` sashiko-bot
2026-09-10 23:17 ` [PATCH v4 08/15] iommu/arm-smmu-v3: Disable the queue IRQs before disabling the SMMU Nicolin Chen
2026-09-10 23:28 ` sashiko-bot
2026-09-10 23:17 ` [PATCH v4 09/15] iommu/arm-smmu-v3: Disable PRI when no IRQ handler is registered Nicolin Chen
2026-09-10 23:36 ` sashiko-bot
2026-09-10 23:17 ` [PATCH v4 10/15] iommu/arm-smmu-v3: Support PRI Page Request in arm_smmu_handle_ppr() Nicolin Chen
2026-09-10 23:35 ` sashiko-bot
2026-09-11 0:14 ` Jonathan Cameron
2026-09-11 23:16 ` Nicolin Chen
2026-09-10 23:17 ` [PATCH v4 11/15] iommu/arm-smmu-v3: Discard partial PRI faults on PRIQ overflow Nicolin Chen
2026-09-10 23:33 ` sashiko-bot [this message]
2026-09-11 0:14 ` Jonathan Cameron
2026-09-10 23:17 ` [PATCH v4 12/15] iommu/arm-smmu-v3: Allocate IOPF queue for ARM_SMMU_FEAT_PRI Nicolin Chen
2026-09-10 23:31 ` sashiko-bot
2026-09-10 23:17 ` [PATCH v4 13/15] PCI/ATS: Add PRI stubs Nicolin Chen
2026-09-10 23:25 ` sashiko-bot
2026-09-10 23:17 ` [PATCH v4 14/15] PCI/ATS: Export pci_enable_pri() and pci_reset_pri() Nicolin Chen
2026-09-10 23:28 ` sashiko-bot
2026-09-10 23:17 ` [PATCH v4 15/15] iommu/arm-smmu-v3: Enable PRI for PCI device in arm_smmu_probe_device() Nicolin Chen
2026-09-10 23:36 ` sashiko-bot
2026-09-11 0:14 ` Jonathan Cameron
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