Re: [PATCH v3 03/13] iommu/arm-smmu-v3: Support platform SSID
From: Auger Eric <eric.auger@redhat.com>
Date: 2019-12-17 16:46:27
Also in:
linux-acpi, linux-devicetree, linux-iommu, linux-pci
Hi Jean, On 12/17/19 4:21 PM, Jean-Philippe Brucker wrote:
Hi Eric, On Tue, Dec 17, 2019 at 12:05:18PM +0100, Auger Eric wrote:quoted
quoted
+ fwspec = dev_iommu_fwspec_get(dev); + if (!err && fwspec) + of_property_read_u32(master_np, "pasid-num-bits", + &fwspec->num_pasid_bits); + }This patch dedicates to platform devices however I fail to understand, at that stage, how/when do you retrieve/store the same max capability for PCI devices?For PCI devices, the max capability is only described by the PCIe PASID capability, not by firmware. Patch 13 deals with PCI by setting masted->ssid_bits from the PASID capability directly, ignoring fwspec->num_pasid_bits.
Get it now. thank you for the explanation. Eric
quoted
Besides, Reviewed-by: Eric Auger <eric.auger@redhat.com>Thanks! Jean _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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