From e7b7a1c3047a40085acd97756d12750b06c2d8ad Mon Sep 17 00:00:00 2001
From: Peter Xu <peterx@redhat.com>
Date: Mon, 24 Apr 2017 02:52:49 +0200
Subject: [PATCH 10/23] memory: add MemoryRegionIOMMUOps.replay() callback

RH-Author: Peter Xu <peterx@redhat.com>
Message-id: <1493002373-13010-6-git-send-email-peterx@redhat.com>
Patchwork-id: 74853
O-Subject: [RHEL7.4 qemu-kvm-rhev PATCH v2 5/9] memory: add MemoryRegionIOMMUOps.replay() callback
Bugzilla: 1335808
RH-Acked-by: Marcel Apfelbaum <marcel@redhat.com>
RH-Acked-by: Michael S. Tsirkin <mst@redhat.com>
RH-Acked-by: Xiao Wang <jasowang@redhat.com>

Originally we have one memory_region_iommu_replay() function, which is
the default behavior to replay the translations of the whole IOMMU
region. However, on some platform like x86, we may want our own replay
logic for IOMMU regions. This patch adds one more hook for IOMMUOps for
the callback, and it'll override the default if set.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: \"Michael S. Tsirkin\" <mst@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1491562755-23867-6-git-send-email-peterx@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
(cherry picked from commit faa362e3cc94bf739a89b457693e3fbd7a4b95c4)
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 include/exec/memory.h | 2 ++
 memory.c              | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/include/exec/memory.h b/include/exec/memory.h
index 055b3a8..c0280b7 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -191,6 +191,8 @@ struct MemoryRegionIOMMUOps {
     void (*notify_flag_changed)(MemoryRegion *iommu,
                                 IOMMUNotifierFlag old_flags,
                                 IOMMUNotifierFlag new_flags);
+    /* Set this up to provide customized IOMMU replay function */
+    void (*replay)(MemoryRegion *iommu, IOMMUNotifier *notifier);
 };
 
 typedef struct CoalescedMemoryRange CoalescedMemoryRange;
diff --git a/memory.c b/memory.c
index ded4bf1..b782d5b 100644
--- a/memory.c
+++ b/memory.c
@@ -1626,6 +1626,12 @@ void memory_region_iommu_replay(MemoryRegion *mr, IOMMUNotifier *n,
     hwaddr addr, granularity;
     IOMMUTLBEntry iotlb;
 
+    /* If the IOMMU has its own replay callback, override */
+    if (mr->iommu_ops->replay) {
+        mr->iommu_ops->replay(mr, n);
+        return;
+    }
+
     granularity = memory_region_iommu_get_min_page_size(mr);
 
     for (addr = 0; addr < memory_region_size(mr); addr += granularity) {
-- 
1.8.3.1