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IOMMU Fixes for Linux v6.0-rc4

Browse source 
Including:
 
 	- Intel VT-d fixes from Lu Baolu
 
 	  - Boot kdump kernels with VT-d scalable mode on
 
 	  - Calculate the right page table levels
 
 	  - Fix two recursive locking issues
 
 	  - Fix a lockdep splat issue
 
 	- AMD IOMMU fixes:
 
 	  - Fix for completion-wait command to use full 64 bits of data
 
 	  - Fix PASID related issue where GPU sound devices failed to
 	    initialize
 
 	- Fix for Virtio-IOMMU to report correct caching behavior, needed for
 	  use with VFIO
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Merge tag 'iommu-fixes-v6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull iommu fixes from Joerg Roedel:

 - Intel VT-d fixes from Lu Baolu:
     - Boot kdump kernels with VT-d scalable mode on
     - Calculate the right page table levels
     - Fix two recursive locking issues
     - Fix a lockdep splat issue

 - AMD IOMMU fixes:
     - Fix for completion-wait command to use full 64 bits of data
     - Fix PASID related issue where GPU sound devices failed to
       initialize

 - Fix for Virtio-IOMMU to report correct caching behavior, needed for
   use with VFIO

* tag 'iommu-fixes-v6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu: Fix false ownership failure on AMD systems with PASID activated
  iommu/vt-d: Fix possible recursive locking in intel_iommu_init()
  iommu/virtio: Fix interaction with VFIO
  iommu/vt-d: Fix lockdep splat due to klist iteration in atomic context
  iommu/vt-d: Fix recursive lock issue in iommu_flush_dev_iotlb()
  iommu/vt-d: Correctly calculate sagaw value of IOMMU
  iommu/vt-d: Fix kdump kernels boot failure with scalable mode
  iommu/amd: use full 64-bit value in build_completion_wait()
This commit is contained in:
Linus Torvalds 2022-09-11 07:32:26 -04:00
commit 2ccd4502f5
8 changed files with 163 additions and 135 deletions
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4
include/linux/dmar.h
View file

@ -65,6 +65,7 @@ struct dmar_pci_notify_info {
extern struct rw_semaphore dmar_global_lock;
extern struct list_head dmar_drhd_units;
extern int intel_iommu_enabled;
#define for_each_drhd_unit(drhd) \
list_for_each_entry_rcu(drhd, &dmar_drhd_units, list, \
@ -88,7 +89,8 @@ extern struct list_head dmar_drhd_units;
static inline bool dmar_rcu_check(void)
{
return rwsem_is_locked(&dmar_global_lock) ||
system_state == SYSTEM_BOOTING;
system_state == SYSTEM_BOOTING ||
(IS_ENABLED(CONFIG_INTEL_IOMMU) && !intel_iommu_enabled);
}
#define dmar_rcu_dereference(p) rcu_dereference_check((p), dmar_rcu_check())