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Diffstat (limited to 'arch/x86/kernel/amd_iommu.c')
-rw-r--r--arch/x86/kernel/amd_iommu.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 329b2c3f2fed..f2766d84c7a0 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -140,16 +140,22 @@ static int iommu_queue_inv_iommu_pages(struct amd_iommu *iommu,
static int iommu_flush_pages(struct amd_iommu *iommu, u16 domid,
u64 address, size_t size)
{
- int i;
+ int s = 0;
unsigned pages = to_pages(address, size);
address &= PAGE_MASK;
- for (i = 0; i < pages; ++i) {
- iommu_queue_inv_iommu_pages(iommu, address, domid, 0, 0);
- address += PAGE_SIZE;
+ if (pages > 1) {
+ /*
+ * If we have to flush more than one page, flush all
+ * TLB entries for this domain
+ */
+ address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS;
+ s = 1;
}
+ iommu_queue_inv_iommu_pages(iommu, address, domid, 0, s);
+
return 0;
}