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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-04-19 10:58:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-04-19 10:58:13 -0700 |
| commit | 9d914b3ef38d996aa6b369267fd2975e7efa92d6 (patch) | |
| tree | 1db3591bd44c2a20e82f16f84fbc07a714ec36dc /arch/x86/kernel | |
| parent | 4ae0ff16efeffe7d06726fd3022cdb2f3e9e6892 (diff) | |
| parent | 665d3e2af83c8fbd149534db8f57d82fa6fa6753 (diff) | |
| download | op-kernel-dev-9d914b3ef38d996aa6b369267fd2975e7efa92d6.zip op-kernel-dev-9d914b3ef38d996aa6b369267fd2975e7efa92d6.tar.gz | |
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, gart: Make sure GART does not map physmem above 1TB
x86, gart: Set DISTLBWALKPRB bit always
x86, gart: Convert spaces to tabs in enable_gart_translation
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/aperture_64.c | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/pci-gart_64.c | 9 |
2 files changed, 9 insertions, 2 deletions
diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c index 86d1ad4..73fb469 100644 --- a/arch/x86/kernel/aperture_64.c +++ b/arch/x86/kernel/aperture_64.c @@ -499,7 +499,7 @@ out: * Don't enable translation yet but enable GART IO and CPU * accesses and set DISTLBWALKPRB since GART table memory is UC. */ - u32 ctl = DISTLBWALKPRB | aper_order << 1; + u32 ctl = aper_order << 1; bus = amd_nb_bus_dev_ranges[i].bus; dev_base = amd_nb_bus_dev_ranges[i].dev_base; diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c index 82ada01..b117efd 100644 --- a/arch/x86/kernel/pci-gart_64.c +++ b/arch/x86/kernel/pci-gart_64.c @@ -81,6 +81,9 @@ static u32 gart_unmapped_entry; #define AGPEXTERN #endif +/* GART can only remap to physical addresses < 1TB */ +#define GART_MAX_PHYS_ADDR (1ULL << 40) + /* backdoor interface to AGP driver */ AGPEXTERN int agp_memory_reserved; AGPEXTERN __u32 *agp_gatt_table; @@ -212,9 +215,13 @@ static dma_addr_t dma_map_area(struct device *dev, dma_addr_t phys_mem, size_t size, int dir, unsigned long align_mask) { unsigned long npages = iommu_num_pages(phys_mem, size, PAGE_SIZE); - unsigned long iommu_page = alloc_iommu(dev, npages, align_mask); + unsigned long iommu_page; int i; + if (unlikely(phys_mem + size > GART_MAX_PHYS_ADDR)) + return bad_dma_addr; + + iommu_page = alloc_iommu(dev, npages, align_mask); if (iommu_page == -1) { if (!nonforced_iommu(dev, phys_mem, size)) return phys_mem; |
