From: Jason Gunthorpe <jgg@nvidia.com>
To: Nicolin Chen <nicolinc@nvidia.com>
Cc: will@kernel.org, robin.murphy@arm.com, kevin.tian@intel.com,
joro@8bytes.org, praan@google.com, kees@kernel.org,
baolu.lu@linux.intel.com, miko.lenczewski@arm.com,
smostafa@google.com, linux-arm-kernel@lists.infradead.org,
iommu@lists.linux.dev, linux-kernel@vger.kernel.org,
stable@vger.kernel.org, jamien@nvidia.com
Subject: Re: [PATCH v5 6/6] iommu/arm-smmu-v3: Detect ARM_SMMU_OPT_KDUMP_ADOPT in probe()
Date: Tue, 19 May 2026 14:58:50 -0300 [thread overview]
Message-ID: <20260519175850.GH3602937@nvidia.com> (raw)
In-Reply-To: <69abcccc388952b2ba0ab4b50c31fcbdac59184a.1778416609.git.nicolinc@nvidia.com>
On Sun, May 10, 2026 at 02:23:05PM -0700, Nicolin Chen wrote:
> arm_smmu_device_hw_probe() runs before arm_smmu_init_structures(), so it's
> natural to decide whether the kdump kernel must adopt the crashed kernel's
> stream table.
>
> Given that memremap is used to adopt the old stream table, set this option
> only on a coherent SMMU.
>
> And make sure SMMU isn't in Service Failure Mode.
>
> Fixes: b63b3439b856 ("iommu/arm-smmu-v3: Abort all transactions if SMMU is enabled in kdump kernel")
> Cc: stable@vger.kernel.org # v6.12+
> Reviewed-by: Kevin Tian <kevin.tian@intel.com>
> Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
> ---
> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 31 +++++++++++++++++++++
> 1 file changed, 31 insertions(+)
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Jason
prev parent reply other threads:[~2026-05-19 17:58 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-10 21:22 [PATCH v5 0/6] iommu/arm-smmu-v3: Fix device crash on kdump kernel Nicolin Chen
2026-05-10 21:23 ` [PATCH v5 1/6] iommu/arm-smmu-v3: Add arm_smmu_kdump_adopt_strtab() for kdump Nicolin Chen
2026-05-19 17:10 ` Jason Gunthorpe
2026-05-19 18:11 ` Nicolin Chen
2026-05-10 21:23 ` [PATCH v5 2/6] iommu/arm-smmu-v3: Implement is_attach_deferred() " Nicolin Chen
2026-05-19 17:43 ` Jason Gunthorpe
2026-05-10 21:23 ` [PATCH v5 3/6] iommu/arm-smmu-v3: Suppress EVTQ/PRIQ events in kdump kernel Nicolin Chen
2026-05-19 17:44 ` Jason Gunthorpe
2026-05-19 20:13 ` Nicolin Chen
2026-05-19 22:27 ` Jason Gunthorpe
2026-05-10 21:23 ` [PATCH v5 4/6] iommu/arm-smmu-v3: Skip EVTQ/PRIQ setup " Nicolin Chen
2026-05-19 17:45 ` Jason Gunthorpe
2026-05-10 21:23 ` [PATCH v5 5/6] iommu/arm-smmu-v3: Retain CR0_SMMUEN during kdump device reset Nicolin Chen
2026-05-10 21:23 ` [PATCH v5 6/6] iommu/arm-smmu-v3: Detect ARM_SMMU_OPT_KDUMP_ADOPT in probe() Nicolin Chen
2026-05-19 17:58 ` Jason Gunthorpe [this message]
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