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| author | Vasant Hegde <vasant.hegde@amd.com> | 2024-05-06 11:20:39 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-30 10:44:58 +0300 |
| commit | 6f69d9a2e805355e8711f7c5f452727b6c8160c0 (patch) | |
| tree | 61a0532107a088cc371f251834d3df613ad131bf /fs/nfsd/nfsctl.c | |
| parent | ff67c88bb26c555c0861b93cecc35019cbc50fbd (diff) | |
| download | linux-6f69d9a2e805355e8711f7c5f452727b6c8160c0.tar.xz | |
iommu/amd: Enable Guest Translation after reading IOMMU feature register
[ Upstream commit de111f6b4f6a3010020825d22a068f416bc29c95 ]
Commit 8e0179733172 ("iommu/amd: Enable Guest Translation before
registering devices") moved IOMMU Guest Translation (GT) enablement to
early init path. It does feature check based on Global EFR value (got from
ACPI IVRS table). Later it adjusts EFR value based on IOMMU feature
register (late_iommu_features_init()).
It seems in some systems BIOS doesn't set gloabl EFR value properly.
This is causing mismatch. Hence move IOMMU GT enablement after
late_iommu_features_init() so that it does check based on IOMMU EFR
value.
Fixes: 8e0179733172 ("iommu/amd: Enable Guest Translation before registering devices")
Reported-by: Klara Modin <klarasmodin@gmail.com>
Closes: https://lore.kernel.org/linux-iommu/333e6eb6-361c-4afb-8107-2573324bf689@gmail.com/
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Tested-by: Klara Modin <klarasmodin@gmail.com>
Link: https://lore.kernel.org/r/20240506082039.7575-1-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs/nfsd/nfsctl.c')
0 files changed, 0 insertions, 0 deletions