[PATCH 08/19] AMD IOMMU: add iommu_flush_domain function

Joerg Roedel
2008-12-04T17:35:43Z

Impact: add a function to flush a domain id on every IOMMU

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
arch/x86/kernel/amd_iommu.c | 22 ++++++++++++++++++++++
1 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index d4d0369..3fb5a04 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -350,6 +350,28 @@ static void iommu_flush_tlb(struct amd_iommu *iommu, u16 domid)
iommu_queue_inv_iommu_pages(iommu, address, domid, 0, 1);
}

+/*
+ * This function is used to flush the IO/TLB for a given protection domain
+ * on every IOMMU in the system
+ */
+static void iommu_flush_domain(u16 domid)
+{
+ unsigned long flags;
+ struct amd_iommu *iommu;
+ struct iommu_cmd cmd;
+
+ __iommu_build_inv_iommu_pages(&cmd, CMD_INV_IOMMU_ALL_PAGES_ADDRESS,
+ domid, 1, 1);
+
+ list_for_each_entry(iommu, &amd_iommu_list, list) {
+ spin_lock_irqsave(&iommu->lock, flags);
+ __iommu_queue_command(iommu, &cmd);
+ __iommu_completion_wait(iommu);
+ __iommu_wait_for_completion(iommu);
+ spin_unlock_irqrestore(&iommu->lock, flags);
+ }
+}
+
/****************************************************************************
*
* The functions below are used the create the page table mappings for
--
1.5.6.4