mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-14 21:01:29 +00:00
AMD IOMMU: avoid unnecessary low zone allocation in alloc_coherent
x86's common alloc_coherent (dma_alloc_coherent in dma-mapping.h) sets up the gfp flag according to the device dma_mask but AMD IOMMU doesn't need it for devices that the IOMMU can do virtual mappings for. This patch avoids unnecessary low zone allocation. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
parent
38ddf41b19
commit
13d9fead3d
@ -1173,6 +1173,9 @@ static void *alloc_coherent(struct device *dev, size_t size,
|
||||
if (!check_device(dev))
|
||||
return NULL;
|
||||
|
||||
if (!get_device_resources(dev, &iommu, &domain, &devid))
|
||||
flag &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
|
||||
|
||||
virt_addr = (void *)__get_free_pages(flag, get_order(size));
|
||||
if (!virt_addr)
|
||||
return 0;
|
||||
@ -1180,8 +1183,6 @@ static void *alloc_coherent(struct device *dev, size_t size,
|
||||
memset(virt_addr, 0, size);
|
||||
paddr = virt_to_phys(virt_addr);
|
||||
|
||||
get_device_resources(dev, &iommu, &domain, &devid);
|
||||
|
||||
if (!iommu || !domain) {
|
||||
*dma_addr = (dma_addr_t)paddr;
|
||||
return virt_addr;
|
||||
|
Loading…
Reference in New Issue
Block a user