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| author | Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> | 2019-11-20 07:55:48 -0600 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2019-12-23 14:06:15 +0100 |
| commit | 813071438e83d338ba5cfe98b3b26c890dc0a6c0 (patch) | |
| tree | a5b3e71f7e71480ed2793d202e5ca54ebb166d00 /tools/perf/scripts/python/bin/stackcollapse-report | |
| parent | iommu/amd: Treat per-device exclusion ranges as r/w unity-mapped regions (diff) | |
| download | linux-813071438e83d338ba5cfe98b3b26c890dc0a6c0.tar.gz linux-813071438e83d338ba5cfe98b3b26c890dc0a6c0.zip | |
iommu/amd: Check feature support bit before accessing MSI capability registers
The IOMMU MMIO access to MSI capability registers is available only if
the EFR[MsiCapMmioSup] is set. Current implementation assumes this bit
is set if the EFR[XtSup] is set, which might not be the case.
Fix by checking the EFR[MsiCapMmioSup] before accessing the MSI address
low/high and MSI data registers via the MMIO.
Fixes: 66929812955b ('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>
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-report')
0 files changed, 0 insertions, 0 deletions