dmesg log on bionic (successful):
[ 7.346107] arm-smmu: deprecated "mmu-masters" DT property in use; DMA API
support unavailable
[ 7.355854] arm-smmu 830000000000.smmu0: probing hardware configuration...
[ 7.362798] arm-smmu 830000000000.smmu0: SMMUv2 with:
[ 7.367895] arm-smmu 830000000000.smmu0: stage 1 translation
[ 7.373694] arm-smmu 830000000000.smmu0: stage 2 translation
[ 7.379494] arm-smmu 830000000000.smmu0: nested translation
[ 7.385205] arm-smmu 830000000000.smmu0: non-coherent table walk
[ 7.391354] arm-smmu 830000000000.smmu0: (IDR0.CTTW overridden by FW
configuration)
[ 7.399170] arm-smmu 830000000000.smmu0: stream matching with 128 register
groups
[ 7.406812] arm-smmu 830000000000.smmu0: 128 context banks (0 stage-2 only)
[ 7.413925] arm-smmu 830000000000.smmu0: enabling workaround for Cavium erratum
27704
[ 7.421918] arm-smmu 830000000000.smmu0: Supported page sizes: 0x62215000
[ 7.428856] arm-smmu 830000000000.smmu0: Stage-1: 48-bit VA -> 48-bit IPA
[ 7.435794] arm-smmu 830000000000.smmu0: Stage-2: 48-bit IPA -> 48-bit PA
[ 7.443907] arm-smmu 831000000000.smmu1: probing hardware configuration...
[ 7.450855] arm-smmu 831000000000.smmu1: SMMUv2 with:
[ 7.455953] arm-smmu 831000000000.smmu1: stage 1 translation
[ 7.461751] arm-smmu 831000000000.smmu1: stage 2 translation
[ 7.467550] arm-smmu 831000000000.smmu1: nested translation
[ 7.473260] arm-smmu 831000000000.smmu1: non-coherent table walk
[ 7.481375] arm-smmu 831000000000.smmu1: (IDR0.CTTW overridden by FW
configuration)
[ 7.491124] arm-smmu 831000000000.smmu1: stream matching with 128 register
groups
[ 7.500689] arm-smmu 831000000000.smmu1: 128 context banks (0 stage-2 only)
[ 7.509731] arm-smmu 831000000000.smmu1: enabling workaround for Cavium erratum
27704
[ 7.519627] arm-smmu 831000000000.smmu1: Supported page sizes: 0x62215000
[ 7.528435] arm-smmu 831000000000.smmu1: Stage-1: 48-bit VA -> 48-bit IPA
[ 7.537208] arm-smmu 831000000000.smmu1: Stage-2: 48-bit IPA -> 48-bit PA
[ 7.547082] arm-smmu 832000000000.smmu2: probing hardware configuration...
[ 7.555825] arm-smmu 832000000000.smmu2: SMMUv2 with:
[ 7.562718] arm-smmu 832000000000.smmu2: stage 1 translation
[ 7.570304] arm-smmu 832000000000.smmu2: stage 2 translation
[ 7.577832] arm-smmu 832000000000.smmu2: nested translation
[ 7.585246] arm-smmu 832000000000.smmu2: non-coherent table walk
[ 7.593088] arm-smmu 832000000000.smmu2: (IDR0.CTTW overridden by FW
configuration)
[ 7.602609] arm-smmu 832000000000.smmu2: stream matching with 128 register
groups
[ 7.611936] arm-smmu 832000000000.smmu2: 128 context banks (0 stage-2 only)
[ 7.620720] arm-smmu 832000000000.smmu2: enabling workaround for Cavium erratum
27704
[ 7.630395] arm-smmu 832000000000.smmu2: Supported page sizes: 0x62215000
[ 7.639030] arm-smmu 832000000000.smmu2: Stage-1: 48-bit VA -> 48-bit IPA
[ 7.647652] arm-smmu 832000000000.smmu2: Stage-2: 48-bit IPA -> 48-bit PA
[ 7.657446] arm-smmu 833000000000.smmu3: probing hardware configuration...
[ 7.666045] arm-smmu 833000000000.smmu3: SMMUv2 with:
[ 7.672781] arm-smmu 833000000000.smmu3: stage 1 translation
[ 7.680207] arm-smmu 833000000000.smmu3: stage 2 translation
[ 7.687584] arm-smmu 833000000000.smmu3: nested translation
[ 7.694845] arm-smmu 833000000000.smmu3: non-coherent table walk
[ 7.702516] arm-smmu 833000000000.smmu3: (IDR0.CTTW overridden by FW
configuration)
[ 7.711851] arm-smmu 833000000000.smmu3: stream matching with 128 register
groups
[ 7.711856] arm-smmu 833000000000.smmu3: 128 context banks (0 stage-2 only)
[ 7.729556] arm-smmu 833000000000.smmu3: enabling workaround for Cavium erratum
27704
[ 7.739008] arm-smmu 833000000000.smmu3: Supported page sizes: 0x62215000
[ 7.747432] arm-smmu 833000000000.smmu3: Stage-1: 48-bit VA -> 48-bit IPA
[ 7.755876] arm-smmu 833000000000.smmu3: Stage-2: 48-bit IPA -> 48-bit PA
** Description changed:
For some of the arm64 systems arm-smmu driver doesn't seem to work with
older versions of the firmware where it encounters "mmu-masters" in the
device-tree.
In this case, kernel is unable to map simple drm device and fail to boot
(Note that for "DMA_API" it works fine). See, drivers/iommu/arm/arm-
smmu/arm-smmu.c:arm_smmu_device_dt_probe() for more information.
I have seen the error for the following arm64 instances in testflinger:
moigno, igor, egede. Updating the firmware seems like one of the
possible solutions.
I have seen this error in 6.8 kernels (noble+jammy). However, both
- series should fail.
+ series should fail regardless of the kernel version.
Focal can be different since "CONFIG_ARM_SMMU_LEGACY_DT_BINDINGS" config
options is not defined there. If Focal works, we can remove this config
option from Jammy and Noble.
+
+ See error messages below for more information.
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Mehmet Basaran (mehmetbasaran)
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Also affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Noble)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2088458
Title:
noble/jammy arm-smmu and firmware discrepancy
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