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| author | Jean-Philippe Brucker <jean-philippe@linaro.org> | 2021-04-01 17:47:11 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2021-04-07 10:54:28 +0200 |
| commit | 434b73e61cc65cdd26618af6fa4736c2ba1eb29b (patch) | |
| tree | 5399a66c1276f4f68215229084db299bc9320400 /drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | |
| parent | 0d35309ab5e080095190965aa7cfc3ca8fb88af9 (diff) | |
| download | lwn-434b73e61cc65cdd26618af6fa4736c2ba1eb29b.tar.gz lwn-434b73e61cc65cdd26618af6fa4736c2ba1eb29b.zip | |
iommu/arm-smmu-v3: Use device properties for pasid-num-bits
The pasid-num-bits property shouldn't need a dedicated fwspec field,
it's a job for device properties. Add properties for IORT, and access
the number of PASID bits using device_property_read_u32().
Suggested-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Will Deacon <will@kernel.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Acked-by: Hanjun Guo <guohanjun@huawei.com>
Link: https://lore.kernel.org/r/20210401154718.307519-3-jean-philippe@linaro.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c')
| -rw-r--r-- | drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 3 |
1 files changed, 2 insertions, 1 deletions
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 8594b4a83043..7edce914c45e 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2392,7 +2392,8 @@ static struct iommu_device *arm_smmu_probe_device(struct device *dev) } } - master->ssid_bits = min(smmu->ssid_bits, fwspec->num_pasid_bits); + device_property_read_u32(dev, "pasid-num-bits", &master->ssid_bits); + master->ssid_bits = min(smmu->ssid_bits, master->ssid_bits); /* * Note that PASID must be enabled before, and disabled after ATS: |