intel_iommu: introduce vtd_reset_caches()

Provide the function and use it in vtd_init().  Used to reset both
context entry cache and iotlb cache for the whole IOMMU unit.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 06aba4ca52fd2c8718b8ba486f22f0aa7c99ed55)
*functional dep. for 2cc9ddcceb
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 0a8cd4e9ccf6c874b56f828bdc892a1ea016bb53..f66e93ed2c1c37719d4ded9c56db2e79b4e87df1 100644 (file)
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -227,6 +227,14 @@ static void vtd_reset_iotlb(IntelIOMMUState *s)
     vtd_iommu_unlock(s);
 }
 
+static void vtd_reset_caches(IntelIOMMUState *s)
+{
+    vtd_iommu_lock(s);
+    vtd_reset_iotlb_locked(s);
+    vtd_reset_context_cache_locked(s);
+    vtd_iommu_unlock(s);
+}
+
 static uint64_t vtd_get_iotlb_key(uint64_t gfn, uint16_t source_id,
                                   uint32_t level)
 {
@@ -3123,10 +3131,7 @@ static void vtd_init(IntelIOMMUState *s)
         s->cap |= VTD_CAP_CM;
     }
 
-    vtd_iommu_lock(s);
-    vtd_reset_context_cache_locked(s);
-    vtd_reset_iotlb_locked(s);
-    vtd_iommu_unlock(s);
+    vtd_reset_caches(s);
 
     /* Define registers with default values and bit semantics */
     vtd_define_long(s, DMAR_VER_REG, 0x10UL, 0, 0);