diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-02-22 22:05:19 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-22 22:05:19 +0300 |
| commit | fc6fc7f1b1095b92d4834e69b385b91e412a7ce5 (patch) | |
| tree | 2ad451d5dac4d460830536944cef1de93be36b2a /drivers/pci/intel-iommu.c | |
| parent | ef1f87aa7ba6224bef1b750b3272ba281d8f43ed (diff) | |
| parent | 770824bdc421ff58a64db608294323571c949f4c (diff) | |
| download | linux-fc6fc7f1b1095b92d4834e69b385b91e412a7ce5.tar.xz | |
Merge branch 'linus' into x86/apic
Conflicts:
arch/x86/mach-default/setup.c
Semantic conflict resolution:
arch/x86/kernel/setup.c
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/pci/intel-iommu.c')
| -rw-r--r-- | drivers/pci/intel-iommu.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index f4b7c79023ff..f3f686581a90 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -61,6 +61,8 @@ /* global iommu list, set NULL for ignored DMAR units */ static struct intel_iommu **g_iommus; +static int rwbf_quirk; + /* * 0: Present * 1-11: Reserved @@ -785,7 +787,7 @@ static void iommu_flush_write_buffer(struct intel_iommu *iommu) u32 val; unsigned long flag; - if (!cap_rwbf(iommu->cap)) + if (!rwbf_quirk && !cap_rwbf(iommu->cap)) return; val = iommu->gcmd | DMA_GCMD_WBF; @@ -3137,3 +3139,15 @@ static struct iommu_ops intel_iommu_ops = { .unmap = intel_iommu_unmap_range, .iova_to_phys = intel_iommu_iova_to_phys, }; + +static void __devinit quirk_iommu_rwbf(struct pci_dev *dev) +{ + /* + * Mobile 4 Series Chipset neglects to set RWBF capability, + * but needs it: + */ + printk(KERN_INFO "DMAR: Forcing write-buffer flush capability\n"); + rwbf_quirk = 1; +} + +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2a40, quirk_iommu_rwbf); |