renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-16 17:23:55 +08:00
Code

x86/amd-iommu: Use fetch_pte in iommu_unmap_page

Browse Source 
Instead of reimplementing existing logic use fetch_pte to
walk the page table in iommu_unmap_page.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2009-09-02 17:02:47 +02:00
parent 9355a08186
commit 38a76eeeaf
1 changed files with 3 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
arch/x86/kernel/amd_iommu.c
View File

@ -546,23 +546,10 @@ static int iommu_map_page(struct protection_domain *dom,
static void iommu_unmap_page(struct protection_domain *dom,
unsigned long bus_addr)
{
u64 *pte;
u64 *pte = fetch_pte(dom, bus_addr);
pte = &dom->pt_root[IOMMU_PTE_L2_INDEX(bus_addr)];
if (!IOMMU_PTE_PRESENT(*pte))
return;
pte = IOMMU_PTE_PAGE(*pte);
pte = &pte[IOMMU_PTE_L1_INDEX(bus_addr)];
if (!IOMMU_PTE_PRESENT(*pte))
return;
pte = IOMMU_PTE_PAGE(*pte);
pte = &pte[IOMMU_PTE_L1_INDEX(bus_addr)];
*pte = 0;
if (pte)
*pte = 0;
}
/*