diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index caaa2a5c98..7031dd4250 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -573,15 +573,12 @@ static void kvm_log_stop(MemoryListener *listener,
 }
 
 /* get kvm's dirty pages bitmap and update qemu's */
-static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section,
-                                         unsigned long *bitmap)
+static void kvm_slot_sync_dirty_pages(KVMSlot *slot)
 {
-    ram_addr_t start = section->offset_within_region +
-                       memory_region_get_ram_addr(section->mr);
-    ram_addr_t pages = int128_get64(section->size) / qemu_real_host_page_size;
+    ram_addr_t start = slot->ram_start_offset;
+    ram_addr_t pages = slot->memory_size / qemu_real_host_page_size;
 
-    cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages);
-    return 0;
+    cpu_physical_memory_set_dirty_lebitmap(slot->dirty_bmap, start, pages);
 }
 
 #define ALIGN(x, y)  (((x)+(y)-1) & ~((y)-1))
@@ -656,26 +653,19 @@ static void kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml,
     KVMState *s = kvm_state;
     KVMSlot *mem;
     hwaddr start_addr, size;
-    hwaddr slot_size, slot_offset = 0;
+    hwaddr slot_size;
 
     size = kvm_align_section(section, &start_addr);
     while (size) {
-        MemoryRegionSection subsection = *section;
-
         slot_size = MIN(kvm_max_slot_size, size);
         mem = kvm_lookup_matching_slot(kml, start_addr, slot_size);
         if (!mem) {
             /* We don't have a slot if we want to trap every access. */
             return;
         }
-
         if (kvm_slot_get_dirty_log(s, mem)) {
-            subsection.offset_within_region += slot_offset;
-            subsection.size = int128_make64(slot_size);
-            kvm_get_dirty_pages_log_range(&subsection, d.dirty_bitmap);
+            kvm_slot_sync_dirty_pages(mem);
         }
-
-        slot_offset += slot_size;
         start_addr += slot_size;
         size -= slot_size;
     }
@@ -1134,7 +1124,8 @@ static void kvm_set_phys_mem(KVMMemoryListener *kml,
     int err;
     MemoryRegion *mr = section->mr;
     bool writeable = !mr->readonly && !mr->rom_device;
-    hwaddr start_addr, size, slot_size;
+    hwaddr start_addr, size, slot_size, mr_offset;
+    ram_addr_t ram_start_offset;
     void *ram;
 
     if (!memory_region_is_ram(mr)) {
@@ -1152,9 +1143,13 @@ static void kvm_set_phys_mem(KVMMemoryListener *kml,
         return;
     }
 
-    /* use aligned delta to align the ram address */
-    ram = memory_region_get_ram_ptr(mr) + section->offset_within_region +
-          (start_addr - section->offset_within_address_space);
+    /* The offset of the kvmslot within the memory region */
+    mr_offset = section->offset_within_region + start_addr -
+        section->offset_within_address_space;
+
+    /* use aligned delta to align the ram address and offset */
+    ram = memory_region_get_ram_ptr(mr) + mr_offset;
+    ram_start_offset = memory_region_get_ram_addr(mr) + mr_offset;
 
     kvm_slots_lock();
 
@@ -1193,6 +1188,7 @@ static void kvm_set_phys_mem(KVMMemoryListener *kml,
         mem->as_id = kml->as_id;
         mem->memory_size = slot_size;
         mem->start_addr = start_addr;
+        mem->ram_start_offset = ram_start_offset;
         mem->ram = ram;
         mem->flags = kvm_mem_flags(mr);
         kvm_slot_init_dirty_bitmap(mem);
@@ -1203,6 +1199,7 @@ static void kvm_set_phys_mem(KVMMemoryListener *kml,
             abort();
         }
         start_addr += slot_size;
+        ram_start_offset += slot_size;
         ram += slot_size;
         size -= slot_size;
     } while (size);
diff --git a/include/sysemu/kvm_int.h b/include/sysemu/kvm_int.h
index e13075f738..ab09a150e1 100644
--- a/include/sysemu/kvm_int.h
+++ b/include/sysemu/kvm_int.h
@@ -25,6 +25,8 @@ typedef struct KVMSlot
     unsigned long *dirty_bmap;
     /* Cache of the address space ID */
     int as_id;
+    /* Cache of the offset in ram address space */
+    ram_addr_t ram_start_offset;
 } KVMSlot;
 
 typedef struct KVMMemoryListener {