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Date: Fri, 4 Sep 2009 11:40:40 +0200
From: Joerg Roedel <joerg.roedel@....com>
To: iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
CC: Joerg Roedel <joerg.roedel@....com>
Subject: [PATCH 02/14] x86/amd-iommu: Use fetch_pte in iommu_unmap_page
Instead of reimplementing existing logic use fetch_pte to
walk the page table in iommu_unmap_page.
Signed-off-by: Joerg Roedel <joerg.roedel@....com>
---
arch/x86/kernel/amd_iommu.c | 19 +++----------------
1 files changed, 3 insertions(+), 16 deletions(-)
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 29bcd35..5e52798 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -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;
-
- 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)];
+ u64 *pte = fetch_pte(dom, bus_addr);
- *pte = 0;
+ if (pte)
+ *pte = 0;
}
/*
--
1.6.3.3
--
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