From 344e70945db3af08862e37a8bb10afaf4c59f88b Mon Sep 17 00:00:00 2001
From: Joao Martins <joao.m.martins@oracle.com>
Date: Mon, 17 Jun 2024 08:33:55 +0200
Subject: vfio/common: Move dirty tracking ranges update to helper
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Separate the changes that update the ranges from the listener, to
make it reusable in preparation to expand its use to vIOMMU support.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
[ clg: - Rebased on upstream
       - Introduced vfio_dirty_tracking_update_range()
       - Fixed typ in commit log ]
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
 hw/vfio/common.c | 38 ++++++++++++++++++++++----------------
 1 file changed, 22 insertions(+), 16 deletions(-)

diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index d48cd9b..fe21591 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -839,20 +839,11 @@ static bool vfio_section_is_vfio_pci(MemoryRegionSection *section,
     return false;
 }
 
-static void vfio_dirty_tracking_update(MemoryListener *listener,
-                                       MemoryRegionSection *section)
+static void vfio_dirty_tracking_update_range(VFIODirtyRanges *range,
+                                             hwaddr iova, hwaddr end,
+                                             bool update_pci)
 {
-    VFIODirtyRangesListener *dirty = container_of(listener,
-                                                  VFIODirtyRangesListener,
-                                                  listener);
-    VFIODirtyRanges *range = &dirty->ranges;
-    hwaddr iova, end, *min, *max;
-
-    if (!vfio_listener_valid_section(section, "tracking_update") ||
-        !vfio_get_section_iova_range(dirty->bcontainer, section,
-                                     &iova, &end, NULL)) {
-        return;
-    }
+    hwaddr *min, *max;
 
     /*
      * The address space passed to the dirty tracker is reduced to three ranges:
@@ -873,8 +864,7 @@ static void vfio_dirty_tracking_update(MemoryListener *listener,
      * The alternative would be an IOVATree but that has a much bigger runtime
      * overhead and unnecessary complexity.
      */
-    if (vfio_section_is_vfio_pci(section, dirty->bcontainer) &&
-        iova >= UINT32_MAX) {
+    if (update_pci && iova >= UINT32_MAX) {
         min = &range->minpci64;
         max = &range->maxpci64;
     } else {
@@ -889,7 +879,23 @@ static void vfio_dirty_tracking_update(MemoryListener *listener,
     }
 
     trace_vfio_device_dirty_tracking_update(iova, end, *min, *max);
-    return;
+}
+
+static void vfio_dirty_tracking_update(MemoryListener *listener,
+                                       MemoryRegionSection *section)
+{
+    VFIODirtyRangesListener *dirty =
+        container_of(listener, VFIODirtyRangesListener, listener);
+    hwaddr iova, end;
+
+    if (!vfio_listener_valid_section(section, "tracking_update") ||
+        !vfio_get_section_iova_range(dirty->bcontainer, section,
+                                     &iova, &end, NULL)) {
+        return;
+    }
+
+    vfio_dirty_tracking_update_range(&dirty->ranges, iova, end,
+                      vfio_section_is_vfio_pci(section, dirty->bcontainer));
 }
 
 static const MemoryListener vfio_dirty_tracking_listener = {
-- 
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