Suravee Suthikulpanit 974b6289e8 iommu/amd: Use IVHD EFR for early initialization of IOMMU features ... [ Upstream commit a44092e326d403c7878018ba532369f84d31dbfa ] IOMMU Extended Feature Register (EFR) is used to communicate the supported features for each IOMMU to the IOMMU driver. This is normally read from the PCI MMIO register offset 0x30, and used by the iommu_feature() helper function. However, there are certain scenarios where the information is needed prior to PCI initialization, and the iommu_feature() function is used prematurely w/o warning. This has caused incorrect initialization of IOMMU. This is the case for the commit 6d39bdee23 ("iommu/amd: Enforce 4k mapping for certain IOMMU data structures") Since, the EFR is also available in the IVHD header, and is available to the driver prior to PCI initialization. Therefore, default to using the IVHD EFR instead. Fixes: 6d39bdee23 ("iommu/amd: Enforce 4k mapping for certain IOMMU data structures") Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Tested-by: Brijesh Singh <brijesh.singh@amd.com> Reviewed-by: Robert Richter <rrichter@amd.com> Link: https://lore.kernel.org/r/20210120135002.2682-1-suravee.suthikulpanit@amd.com Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-02-03 23:28:50 +01:00
..
amd_iommu_types.h	iommu/amd: Use IVHD EFR for early initialization of IOMMU features	2021-02-03 23:28:50 +01:00
amd_iommu.h	iommu/amd: Use IVHD EFR for early initialization of IOMMU features	2021-02-03 23:28:50 +01:00
debugfs.c
init.c	iommu/amd: Use IVHD EFR for early initialization of IOMMU features	2021-02-03 23:28:50 +01:00
iommu_v2.c	drm, iommu: Change type of pasid to u32	2020-09-17 19:21:16 +02:00
iommu.c	dma-mapping updates for 5.10	2020-10-15 14:43:29 -07:00
Kconfig	iommu/amd: Use cmpxchg_double() when updating 128-bit IRTE	2020-09-04 11:53:18 +02:00
Makefile	iommu/amd: Move Kconfig and Makefile bits down into amd directory	2020-07-29 14:15:36 +02:00
quirks.c