x86/amd-iommu: Add function to flush all DTEs on one IOMMU
This function flushes all DTE entries on one IOMMU for all
devices behind this IOMMU. This is required for command
buffer resetting later.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 64cc582..2dc0933 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -516,6 +516,19 @@
flush_all_domains_on_iommu(iommu);
}
+static void flush_all_devices_for_iommu(struct amd_iommu *iommu)
+{
+ int i;
+
+ for (i = 0; i <= amd_iommu_last_bdf; ++i) {
+ if (iommu != amd_iommu_rlookup_table[i])
+ continue;
+
+ iommu_queue_inv_dev_entry(iommu, i);
+ iommu_completion_wait(iommu);
+ }
+}
+
void amd_iommu_flush_all_devices(void)
{
struct amd_iommu *iommu;