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authorJoerg Roedel <jroedel@suse.de>2015-04-01 14:58:51 +0200
committerJoerg Roedel <jroedel@suse.de>2015-04-02 13:31:08 +0200
commitb24b1b63a37d05d61601d643ef30f95dd2452048 (patch)
treeab66dfad2947c457d366cc28edfdf1e5013f3321 /drivers/iommu
parent5d7c94c3f4f20964b217d64ee44a9a08320c315a (diff)
downloadlinux-b24b1b63a37d05d61601d643ef30f95dd2452048.tar.bz2
iommu/amd: Optimize amd_iommu_iova_to_phys for new fetch_pte interface
Now that fetch_pte returns the page-size of the pte, this function can be optimized too. Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/amd_iommu.c12
1 files changed, 3 insertions, 9 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index f97441b6aaad..7a00e5d40eb6 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -3375,7 +3375,6 @@ static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom,
{
struct protection_domain *domain = dom->priv;
unsigned long offset_mask, pte_pgsize;
- phys_addr_t paddr;
u64 *pte, __pte;
if (domain->mode == PAGE_MODE_NONE)
@@ -3386,15 +3385,10 @@ static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom,
if (!pte || !IOMMU_PTE_PRESENT(*pte))
return 0;
- if (PM_PTE_LEVEL(*pte) == 0)
- offset_mask = PAGE_SIZE - 1;
- else
- offset_mask = PTE_PAGE_SIZE(*pte) - 1;
-
- __pte = *pte & PM_ADDR_MASK;
- paddr = (__pte & ~offset_mask) | (iova & offset_mask);
+ offset_mask = pte_pgsize - 1;
+ __pte = *pte & PM_ADDR_MASK;
- return paddr;
+ return (__pte & ~offset_mask) | (iova & offset_mask);
}
static bool amd_iommu_capable(enum iommu_cap cap)