[PULL 09/16] i386/pc: factor out cxl range end to helper

["Michael S. Tsirkin" <mst@redhat.com>]

From: Joao Martins <joao.m.martins@oracle.com>

Move calculation of CXL memory region end to separate helper.

This is in preparation to a future change that removes CXL range
dependency on the CXL memory region, with the goal of allowing
pc_pci_hole64_start() to be called before any memory region are
initialized.

Cc: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20220719170014.27028-6-joao.m.martins@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/pc.c | 31 +++++++++++++++++++++----------
 1 file changed, 21 insertions(+), 10 deletions(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index d1e20ccb27..cb27309e76 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -825,6 +825,25 @@ static hwaddr pc_above_4g_end(PCMachineState *pcms)
     return x86ms->above_4g_mem_start + x86ms->above_4g_mem_size;
 }
 
+static uint64_t pc_get_cxl_range_end(PCMachineState *pcms)
+{
+    uint64_t start = 0;
+
+    if (pcms->cxl_devices_state.host_mr.addr) {
+        start = pcms->cxl_devices_state.host_mr.addr +
+            memory_region_size(&pcms->cxl_devices_state.host_mr);
+        if (pcms->cxl_devices_state.fixed_windows) {
+            GList *it;
+            for (it = pcms->cxl_devices_state.fixed_windows; it; it = it->next) {
+                CXLFixedWindow *fw = it->data;
+                start = fw->mr.addr + memory_region_size(&fw->mr);
+            }
+        }
+    }
+
+    return start;
+}
+
 void pc_memory_init(PCMachineState *pcms,
                     MemoryRegion *system_memory,
                     MemoryRegion *rom_memory,
@@ -1020,16 +1039,8 @@ uint64_t pc_pci_hole64_start(void)
     MachineState *ms = MACHINE(pcms);
     uint64_t hole64_start = 0;
 
-    if (pcms->cxl_devices_state.host_mr.addr) {
-        hole64_start = pcms->cxl_devices_state.host_mr.addr +
-            memory_region_size(&pcms->cxl_devices_state.host_mr);
-        if (pcms->cxl_devices_state.fixed_windows) {
-            GList *it;
-            for (it = pcms->cxl_devices_state.fixed_windows; it; it = it->next) {
-                CXLFixedWindow *fw = it->data;
-                hole64_start = fw->mr.addr + memory_region_size(&fw->mr);
-            }
-        }
+    if (pcms->cxl_devices_state.is_enabled) {
+        hole64_start = pc_get_cxl_range_end(pcms);
     } else if (pcmc->has_reserved_memory && ms->device_memory->base) {
         hole64_start = ms->device_memory->base;
         if (!pcmc->broken_reserved_end) {
-- 
MST