From: Jason Gunthorpe <jgg@nvidia.com>
To: Nicolin Chen <nicolinc@nvidia.com>
Cc: kevin.tian@intel.com, will@kernel.org, corbet@lwn.net,
joro@8bytes.org, suravee.suthikulpanit@amd.com,
robin.murphy@arm.com, dwmw2@infradead.org,
baolu.lu@linux.intel.com, shuah@kernel.org,
linux-kernel@vger.kernel.org, iommu@lists.linux.dev,
linux-arm-kernel@lists.infradead.org,
linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org,
eric.auger@redhat.com, jean-philippe@linaro.org, mdf@kernel.org,
mshavit@google.com, shameerali.kolothum.thodi@huawei.com,
smostafa@google.com, ddutile@redhat.com, yi.l.liu@intel.com,
patches@lists.linux.dev
Subject: Re: [PATCH v3 06/14] iommufd: Add IOMMUFD_OBJ_VIRQ and IOMMUFD_CMD_VIRQ_ALLOC
Date: Thu, 2 Jan 2025 16:52:46 -0400 [thread overview]
Message-ID: <20250102205246.GG5556@nvidia.com> (raw)
In-Reply-To: <dc1252de7ff06c944cb7d91c91b4f61c25182f91.1734477608.git.nicolinc@nvidia.com>
On Tue, Dec 17, 2024 at 09:00:19PM -0800, Nicolin Chen wrote:
> +/* An iommufd_virq_header packs a vIOMMU interrupt in an iommufd_virq queue */
> +struct iommufd_virq_header {
> + struct list_head node;
> + ssize_t irq_len;
> + void *irq_data;
> +};
Based on how it is used in iommufd_viommu_report_irq()
+ header = kzalloc(sizeof(*header) + irq_len, GFP_KERNEL);
+ header->irq_data = (void *)header + sizeof(*header);
+ memcpy(header->irq_data, irq_ptr, irq_len);
It should be a flex array and use the various flexarray tools
struct iommufd_virq_header {
ssize_t irq_len;
u64 irq_data[] __counted_by(irq_len);
}
Jason
next prev parent reply other threads:[~2025-01-02 20:52 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-18 5:00 [PATCH v3 00/14] iommufd: Add vIOMMU infrastructure (Part-3: vIRQ) Nicolin Chen
2024-12-18 5:00 ` [PATCH v3 01/14] iommufd: Keep IOCTL list in an alphabetical order Nicolin Chen
2024-12-19 22:30 ` Nicolin Chen
2024-12-18 5:00 ` [PATCH v3 02/14] iommufd/fault: Add an iommufd_fault_init() helper Nicolin Chen
2024-12-18 5:00 ` [PATCH v3 03/14] iommufd/fault: Move iommufd_fault_iopf_handler() to header Nicolin Chen
2024-12-18 5:00 ` [PATCH v3 04/14] iommufd: Abstract an iommufd_eventq from iommufd_fault Nicolin Chen
2024-12-18 5:00 ` [PATCH v3 05/14] iommufd: Rename fault.c to eventq.c Nicolin Chen
2024-12-18 5:00 ` [PATCH v3 06/14] iommufd: Add IOMMUFD_OBJ_VIRQ and IOMMUFD_CMD_VIRQ_ALLOC Nicolin Chen
2024-12-19 22:31 ` Nicolin Chen
2025-01-02 20:45 ` Jason Gunthorpe
2025-01-02 22:30 ` Nicolin Chen
2025-01-02 20:52 ` Jason Gunthorpe [this message]
2025-01-03 3:30 ` Nicolin Chen
2025-01-06 16:59 ` Jason Gunthorpe
2024-12-18 5:00 ` [PATCH v3 07/14] iommufd/viommu: Add iommufd_viommu_get_vdev_id helper Nicolin Chen
2024-12-19 2:05 ` Baolu Lu
2024-12-19 5:06 ` Nicolin Chen
2024-12-23 2:28 ` Baolu Lu
2024-12-23 19:29 ` Nicolin Chen
2025-01-02 20:29 ` Jason Gunthorpe
2025-01-03 1:19 ` Baolu Lu
2024-12-18 5:00 ` [PATCH v3 08/14] iommufd/viommu: Add iommufd_viommu_report_irq helper Nicolin Chen
2024-12-18 5:00 ` [PATCH v3 09/14] iommufd/selftest: Require vdev_id when attaching to a nested domain Nicolin Chen
2024-12-18 5:00 ` [PATCH v3 10/14] iommufd/selftest: Add IOMMU_TEST_OP_TRIGGER_VIRQ for vIRQ coverage Nicolin Chen
2024-12-18 5:00 ` [PATCH v3 11/14] iommufd/selftest: Add IOMMU_VIRQ_ALLOC test coverage Nicolin Chen
2024-12-18 5:00 ` [PATCH v3 12/14] Documentation: userspace-api: iommufd: Update FAULT and VIRQ Nicolin Chen
2024-12-18 5:00 ` [PATCH v3 13/14] iommu/arm-smmu-v3: Introduce struct arm_smmu_vmaster Nicolin Chen
2024-12-18 5:00 ` [PATCH v3 14/14] iommu/arm-smmu-v3: Report IRQs that belong to devices attached to vIOMMU Nicolin Chen
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