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IOMMU Fixes for Linux v7.0-rc6 

Including:
 
 	- IOMMU-PT related compile breakage in for AMD driver.
 
 	- IOTLB flushing behavior when unmapped region is larger than requested
 	  due to page-sizes.
 
 	- Fix IOTLB flush behavior with empty gathers.
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Merge tag 'iommu-fixes-v7.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux

Pull iommu fixes from Joerg Roedel:

 - IOMMU-PT related compile breakage in for AMD driver

 - IOTLB flushing behavior when unmapped region is larger than requested
   due to page-sizes

 - Fix IOTLB flush behavior with empty gathers

* tag 'iommu-fixes-v7.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux:
  iommupt/amdv1: mark amdv1pt_install_leaf_entry as __always_inline
  iommupt: Fix short gather if the unmap goes into a large mapping
  iommu: Do not call drivers for empty gathers
This commit is contained in:
Linus Torvalds 2026-04-02 09:53:16 -07:00
parent 2ec9074b28 8b72aa5704
commit 4c2c526b5a
3 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/iommu/generic_pt/fmt/amdv1.h
View File

@ -191,7 +191,7 @@ static inline enum pt_entry_type amdv1pt_load_entry_raw(struct pt_state *pts)
}
#define pt_load_entry_raw amdv1pt_load_entry_raw
static inline void
static __always_inline void
amdv1pt_install_leaf_entry(struct pt_state *pts, pt_oaddr_t oa,
unsigned int oasz_lg2,
const struct pt_write_attrs *attrs)

2
drivers/iommu/generic_pt/iommu_pt.h
View File

@ -1057,7 +1057,7 @@ size_t DOMAIN_NS(unmap_pages)(struct iommu_domain *domain, unsigned long iova,
pt_walk_range(&range, __unmap_range, &unmap);
gather_range_pages(iotlb_gather, iommu_table, iova, len,
gather_range_pages(iotlb_gather, iommu_table, iova, unmap.unmapped,
&unmap.free_list);
return unmap.unmapped;

3
include/linux/iommu.h
View File

@ -980,7 +980,8 @@ static inline void iommu_flush_iotlb_all(struct iommu_domain *domain)
static inline void iommu_iotlb_sync(struct iommu_domain *domain,
struct iommu_iotlb_gather *iotlb_gather)
{
if (domain->ops->iotlb_sync)
if (domain->ops->iotlb_sync &&
likely(iotlb_gather->start < iotlb_gather->end))
domain->ops->iotlb_sync(domain, iotlb_gather);
iommu_iotlb_gather_init(iotlb_gather);