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| author | Ingo Molnar <mingo@elte.hu> | 2009-02-20 17:40:43 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-20 17:40:43 +0100 |
| commit | 3b6f7b9beb553ea71a6d4d76ba82cf32eb6dadd2 (patch) | |
| tree | 2cd8a8d61f350aa3b00e6b0afc998544923f183e /drivers/pci/intel-iommu.c | |
| parent | 9be1b56a3e718aa998772019c57c398dbb19e258 (diff) | |
| parent | 07a66d7c53a538e1a9759954a82bb6c07365eff9 (diff) | |
| download | op-kernel-dev-3b6f7b9beb553ea71a6d4d76ba82cf32eb6dadd2.zip op-kernel-dev-3b6f7b9beb553ea71a6d4d76ba82cf32eb6dadd2.tar.gz | |
Merge branch 'x86/urgent' into x86/core
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 f4b7c79..f3f6865 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); |
