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iommu/amd: Optimize alloc_new_range for new fetch_pte interface 

Now that fetch_pte returns the page-size of the pte, the
call in this function can also be optimized a little bit.

Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
hifive-unleashed-5.1
Joerg Roedel 2015-04-01 14:58:50 +02:00
parent 71b390e9be
commit 5d7c94c3f4
1 changed files with 4 additions and 4 deletions
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8
drivers/iommu/amd_iommu.c
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@ -1591,7 +1591,7 @@ static int alloc_new_range(struct dma_ops_domain *dma_dom,
{
int index = dma_dom->aperture_size >> APERTURE_RANGE_SHIFT;
struct amd_iommu *iommu;
unsigned long i, old_size;
unsigned long i, old_size, pte_pgsize;
#ifdef CONFIG_IOMMU_STRESS
populate = false;
@ -1664,13 +1664,13 @@ static int alloc_new_range(struct dma_ops_domain *dma_dom,
*/
for (i = dma_dom->aperture[index]->offset;
i < dma_dom->aperture_size;
i += PAGE_SIZE) {
unsigned long pte_pgsize;
i += pte_pgsize) {
u64 *pte = fetch_pte(&dma_dom->domain, i, &pte_pgsize);
if (!pte || !IOMMU_PTE_PRESENT(*pte))
continue;
dma_ops_reserve_addresses(dma_dom, i >> PAGE_SHIFT, 1);
dma_ops_reserve_addresses(dma_dom, i >> PAGE_SHIFT,
pte_pgsize >> 12);
}
update_domain(&dma_dom->domain);