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IOMMU Fixes for Linux v3.15-rc5

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3 Fixes for the AMD IOMMU driver:
 
 	* Fix a locking issue around get_user_pages()
 	* Fix 2 issues with device aliasing and
 	  exclusion range handling
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Merge tag 'iommu-fixes-v3.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull iommu fixes from Joerg Roedel:
 "Three fixes for the AMD IOMMU driver:
   - fix a locking issue around get_user_pages()
   - fix two issues with device aliasing and exclusion range handling"

* tag 'iommu-fixes-v3.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/amd: fix enabling exclusion range for an exact device
  iommu/amd: Take mmap_sem when calling get_user_pages
  iommu/amd: Fix interrupt remapping for aliased devices
This commit is contained in:
Linus Torvalds 2014-05-22 04:29:39 +09:00
commit 989d216f86
3 changed files with 4 additions and 2 deletions
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2
drivers/iommu/amd_iommu.c
View File

@ -3999,7 +3999,7 @@ static struct irq_remap_table *get_irq_table(u16 devid, bool ioapic)
iommu_flush_dte(iommu, devid);
if (devid != alias) {
irq_lookup_table[alias] = table;
set_dte_irq_entry(devid, table);
set_dte_irq_entry(alias, table);
iommu_flush_dte(iommu, alias);
}

2
drivers/iommu/amd_iommu_init.c
View File

@ -788,7 +788,7 @@ static void __init set_device_exclusion_range(u16 devid, struct ivmd_header *m)
* per device. But we can enable the exclusion range per
* device. This is done here
*/
set_dev_entry_bit(m->devid, DEV_ENTRY_EX);
set_dev_entry_bit(devid, DEV_ENTRY_EX);
iommu->exclusion_start = m->range_start;
iommu->exclusion_length = m->range_length;
}

2
drivers/iommu/amd_iommu_v2.c
View File

@ -504,8 +504,10 @@ static void do_fault(struct work_struct *work)
write = !!(fault->flags & PPR_FAULT_WRITE);
down_read(&fault->state->mm->mmap_sem);
npages = get_user_pages(fault->state->task, fault->state->mm,
fault->address, 1, write, 0, &page, NULL);
up_read(&fault->state->mm->mmap_sem);
if (npages == 1) {
put_page(page);