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authorLinus Torvalds <torvalds@linux-foundation.org>2010-06-27 07:37:51 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-06-27 07:37:51 -0700
commite6d133618836f317f5a2be657f768e56552b9419 (patch)
treea08f0ef9fbcab6c33c7c85e58a0012e9119d2ff1 /drivers
parent7f607455c3b91fec267c48a4177526cbb5e501f4 (diff)
parent2d9e667efdfb4e986074d98e7d9a424003c7c43b (diff)
Merge git://git.infradead.org/iommu-2.6
* git://git.infradead.org/iommu-2.6: intel-iommu: Force-disable IOMMU for iGFX on broken Cantiga revisions. intel-iommu: Fix double lock in get_domain_for_dev() intel-iommu: Fix reference by physical address in intel_iommu_attach_device()
Diffstat (limited to 'drivers')
-rw-r--r--drivers/pci/intel-iommu.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 796828fce34c..c9171be74564 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -340,7 +340,7 @@ int dmar_disabled = 0;
int dmar_disabled = 1;
#endif /*CONFIG_DMAR_DEFAULT_ON*/
-static int __initdata dmar_map_gfx = 1;
+static int dmar_map_gfx = 1;
static int dmar_forcedac;
static int intel_iommu_strict;
@@ -1874,14 +1874,15 @@ static struct dmar_domain *get_domain_for_dev(struct pci_dev *pdev, int gaw)
}
}
if (found) {
+ spin_unlock_irqrestore(&device_domain_lock, flags);
free_devinfo_mem(info);
domain_exit(domain);
domain = found;
} else {
list_add(&info->link, &domain->devices);
list_add(&info->global, &device_domain_list);
+ spin_unlock_irqrestore(&device_domain_lock, flags);
}
- spin_unlock_irqrestore(&device_domain_lock, flags);
}
found_domain:
@@ -3603,7 +3604,8 @@ static int intel_iommu_attach_device(struct iommu_domain *domain,
pte = dmar_domain->pgd;
if (dma_pte_present(pte)) {
free_pgtable_page(dmar_domain->pgd);
- dmar_domain->pgd = (struct dma_pte *)dma_pte_addr(pte);
+ dmar_domain->pgd = (struct dma_pte *)
+ phys_to_virt(dma_pte_addr(pte));
}
dmar_domain->agaw--;
}
@@ -3719,6 +3721,12 @@ static void __devinit quirk_iommu_rwbf(struct pci_dev *dev)
*/
printk(KERN_INFO "DMAR: Forcing write-buffer flush capability\n");
rwbf_quirk = 1;
+
+ /* https://bugzilla.redhat.com/show_bug.cgi?id=538163 */
+ if (dev->revision == 0x07) {
+ printk(KERN_INFO "DMAR: Disabling IOMMU for graphics on this chipset\n");
+ dmar_map_gfx = 0;
+ }
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2a40, quirk_iommu_rwbf);