diff options
| author | Liu Yi L <yi.l.liu@intel.com> | 2021-01-07 00:03:57 +0800 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-01-07 14:38:15 +0000 |
| commit | 7c29ada5e70083805bc3a68daa23441df421fbee (patch) | |
| tree | 762d8fe765d706fd1eabd794ecfc1bc2b0e80c3e /arch/arm64/kernel/cpufeature.c | |
| parent | 18abda7a2d555783d28ea1701f3ec95e96237a86 (diff) | |
| download | linux-7c29ada5e70083805bc3a68daa23441df421fbee.tar.bz2 | |
iommu/vt-d: Fix ineffective devTLB invalidation for subdevices
iommu_flush_dev_iotlb() is called to invalidate caches on a device but
only loops over the devices which are fully-attached to the domain. For
sub-devices, this is ineffective and can result in invalid caching
entries left on the device.
Fix the missing invalidation by adding a loop over the subdevices and
ensuring that 'domain->has_iotlb_device' is updated when attaching to
subdevices.
Fixes: 67b8e02b5e76 ("iommu/vt-d: Aux-domain specific domain attach/detach")
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/1609949037-25291-4-git-send-email-yi.l.liu@intel.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/kernel/cpufeature.c')
0 files changed, 0 insertions, 0 deletions