iommu/vt-d: Replace spin_lock_irqsave() with spin_lock()

Browse source

The iommu->lock is used to protect changes in root/context/pasid tables
and domain ID allocation. There's no use case to change these resources
in any interrupt context. Therefore, it is unnecessary to disable the
interrupts when the spinlock is held. The same thing happens on the
device_domain_lock side, which protects the device domain attachment
information. This replaces spin_lock/unlock_irqsave/irqrestore() calls
with the normal spin_lock/unlock().

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20220706025524.2904370-6-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

...

This commit is contained in:

Lu Baolu 2022-07-12 08:08:56 +08:00 • committed by Joerg Roedel

parent 2e1c8dafb8

commit ffd5869d93

3 changed files with 32 additions and 46 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

6

drivers/iommu/intel/debugfs.c

View file

66

drivers/iommu/intel/iommu.c

View file

6

drivers/iommu/intel/svm.c

View file