From: "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>
To: linux-coco@lists.linux.dev, kvmarm@lists.linux.dev,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Cc: "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>,
Alexey Kardashevskiy <aik@amd.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Dan Williams <dan.j.williams@intel.com>,
Jason Gunthorpe <jgg@ziepe.ca>, Joerg Roedel <joro@8bytes.org>,
Jonathan Cameron <jic23@kernel.org>,
Marc Zyngier <maz@kernel.org>, Nicolin Chen <nicolinc@nvidia.com>,
Pranjal Shrivastava <praan@google.com>,
Robin Murphy <robin.murphy@arm.com>,
Samuel Ortiz <sameo@rivosinc.com>,
Steven Price <steven.price@arm.com>,
Suzuki K Poulose <Suzuki.Poulose@arm.com>,
Will Deacon <will@kernel.org>,
Xu Yilun <yilun.xu@linux.intel.com>
Subject: [RFC PATCH v4 02/16] iommu/arm-smmu-v3: Save the programmed MSI message in msi_desc
Date: Mon, 27 Apr 2026 14:23:30 +0530 [thread overview]
Message-ID: <20260427085344.941627-3-aneesh.kumar@kernel.org> (raw)
In-Reply-To: <20260427085344.941627-1-aneesh.kumar@kernel.org>
Cache the MSI message in desc->msg from arm_smmu_write_msi_msg(). The
realm support code later reads the MSI address and data through
irq_get_msi_desc(), so it needs the descriptor to reflect the last
programmed message.
This matches the caching done by __pci_write_msi_msg().
Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index d5b9ab95beea..17fd99887aab 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -4012,6 +4012,9 @@ static void arm_smmu_write_msi_msg(struct msi_desc *desc, struct msi_msg *msg)
if (smmu->features & ARM_SMMU_FEAT_PRI)
max_config_index = PRIQ_MSI_INDEX;
+ /* save the programmed msi message details */
+ desc->msg = *msg;
+
/* Don't try to config for Realm interrupts. */
if (desc->msi_index > max_config_index)
return;
--
2.43.0
next prev parent reply other threads:[~2026-04-27 8:54 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-27 8:53 [RFC PATCH v4 00/16] coco/TSM: Implement host-side support for Arm CCA TDISP setup Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 01/16] iommu/arm-smmu-v3: Discover RME support and realm IRQ topology Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` Aneesh Kumar K.V (Arm) [this message]
2026-04-27 8:53 ` [RFC PATCH v4 03/16] iommu/arm-smmu-v3: Add initial pSMMU realm viommu plumbing Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 04/16] iommu/arm-smmu-v3: Track realm pSMMU users with refcount_t Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 05/16] coco: host: arm64: Add support for virtual device communication Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 06/16] coco: host: arm64: Add support for RMM vdev objects Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 07/16] coco: host: arm64: Add pdev stream key refresh and purge helpers Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 08/16] coco: host: arm64: Add helpers to unlock and destroy RMM vdev Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 09/16] coco: host: arm64: Add support for da object read RHI handling Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 10/16] coco: host: arm64: Add helper for cached object fetches Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 11/16] coco: host: arm64: Fetch interface report via RMI Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 12/16] coco: host: arm64: Fetch device measurements " Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 13/16] coco: host: KVM: arm64: Handle vdev validate-mapping exits Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 14/16] KVM: arm64: Unmap device mappings when a private granule is destroyed Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 15/16] coco: host: arm64: Transition vdevs to TDISP RUN state Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 16/16] KVM: arm64: CCA: enable DA in realm create parameters Aneesh Kumar K.V (Arm)
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