iommu/amd: Only support x2APIC with IVHD type 11h/40h

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Current implementation for IOMMU x2APIC support makes use of
the MMIO access to MSI capability block registers, which requires
checking EFR[MsiCapMmioSup]. However, only IVHD type 11h/40h contain
the information, and not in the IVHD type 10h IOMMU feature reporting
field. Since the BIOS in newer systems, which supports x2APIC, would
normally contain IVHD type 11h/40h, remove the IOMMU_FEAT_XTSUP_SHIFT
check for IVHD type 10h, and only support x2APIC with IVHD type 11h/40h.

Fixes: 6692981295 ('iommu/amd: Add support for X2APIC IOMMU interrupts')
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Suravee Suthikulpanit 2019-11-20 07:55:49 -06:00 • committed by Joerg Roedel

parent 813071438e

commit 966b753cf3

2 changed files with 0 additions and 3 deletions

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drivers/iommu/amd_iommu_init.c

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1

drivers/iommu/amd_iommu_types.h

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