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| author | Nicolin Chen <nicolinc@nvidia.com> | 2025-03-11 12:44:31 -0700 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2025-03-18 14:17:48 -0300 |
| commit | e7d3fa3d29d5b2ed12d247cf57a0a34fffe89eb8 (patch) | |
| tree | 2db0e550d31519703e498f285efa7bbbb52282f0 /include | |
| parent | iommu/arm-smmu-v3: Introduce struct arm_smmu_vmaster (diff) | |
| download | linux-e7d3fa3d29d5b2ed12d247cf57a0a34fffe89eb8.tar.gz linux-e7d3fa3d29d5b2ed12d247cf57a0a34fffe89eb8.zip | |
iommu/arm-smmu-v3: Report events that belong to devices attached to vIOMMU
Aside from the IOPF framework, iommufd provides an additional pathway to
report hardware events, via the vEVENTQ of vIOMMU infrastructure.
Define an iommu_vevent_arm_smmuv3 uAPI structure, and report stage-1 events
in the threaded IRQ handler. Also, add another four event record types that
can be forwarded to a VM.
Link: https://patch.msgid.link/r/5cf6719682fdfdabffdb08374cdf31ad2466d75a.1741719725.git.nicolinc@nvidia.com
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Pranjal Shrivastava <praan@google.com>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/iommufd.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h index dbb8787d9c63..8719d4f5d618 100644 --- a/include/uapi/linux/iommufd.h +++ b/include/uapi/linux/iommufd.h @@ -1054,9 +1054,32 @@ struct iommufd_vevent_header { /** * enum iommu_veventq_type - Virtual Event Queue Type * @IOMMU_VEVENTQ_TYPE_DEFAULT: Reserved for future use + * @IOMMU_VEVENTQ_TYPE_ARM_SMMUV3: ARM SMMUv3 Virtual Event Queue */ enum iommu_veventq_type { IOMMU_VEVENTQ_TYPE_DEFAULT = 0, + IOMMU_VEVENTQ_TYPE_ARM_SMMUV3 = 1, +}; + +/** + * struct iommu_vevent_arm_smmuv3 - ARM SMMUv3 Virtual Event + * (IOMMU_VEVENTQ_TYPE_ARM_SMMUV3) + * @evt: 256-bit ARM SMMUv3 Event record, little-endian. + * Reported event records: (Refer to "7.3 Event records" in SMMUv3 HW Spec) + * - 0x04 C_BAD_STE + * - 0x06 F_STREAM_DISABLED + * - 0x08 C_BAD_SUBSTREAMID + * - 0x0a C_BAD_CD + * - 0x10 F_TRANSLATION + * - 0x11 F_ADDR_SIZE + * - 0x12 F_ACCESS + * - 0x13 F_PERMISSION + * + * StreamID field reports a virtual device ID. To receive a virtual event for a + * device, a vDEVICE must be allocated via IOMMU_VDEVICE_ALLOC. + */ +struct iommu_vevent_arm_smmuv3 { + __aligned_le64 evt[4]; }; /** |