diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-03-17 16:21:20 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-17 16:21:20 +0100 |
| commit | 47239561e39bceefecc3cd67f71fcf86a198a8ff (patch) | |
| tree | 9823d0973494ea8acabb744bc3aba42b610fb434 /drivers/pci/intel-iommu.c | |
| parent | ed681a91ab805341675d166a9592551093c0a2d9 (diff) | |
| parent | 5bee17f18b595937e6beafeee5197868a3f74a06 (diff) | |
Merge branch 'linus' into core/printk
Diffstat (limited to 'drivers/pci/intel-iommu.c')
| -rw-r--r-- | drivers/pci/intel-iommu.c | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 3dfecb20d5e..f3f686581a9 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 @@ -268,7 +270,12 @@ static long list_size; static void domain_remove_dev_info(struct dmar_domain *domain); -int dmar_disabled; +#ifdef CONFIG_DMAR_DEFAULT_ON +int dmar_disabled = 0; +#else +int dmar_disabled = 1; +#endif /*CONFIG_DMAR_DEFAULT_ON*/ + static int __initdata dmar_map_gfx = 1; static int dmar_forcedac; static int intel_iommu_strict; @@ -284,9 +291,12 @@ static int __init intel_iommu_setup(char *str) if (!str) return -EINVAL; while (*str) { - if (!strncmp(str, "off", 3)) { + if (!strncmp(str, "on", 2)) { + dmar_disabled = 0; + printk(KERN_INFO "Intel-IOMMU: enabled\n"); + } else if (!strncmp(str, "off", 3)) { dmar_disabled = 1; - printk(KERN_INFO"Intel-IOMMU: disabled\n"); + printk(KERN_INFO "Intel-IOMMU: disabled\n"); } else if (!strncmp(str, "igfx_off", 8)) { dmar_map_gfx = 0; printk(KERN_INFO @@ -777,7 +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; @@ -3129,3 +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); |