pflash_cfi01: New pflash_cfi01_legacy_drive()

Factored out of pc_system_firmware_init() so the next commit can reuse
it in hw/arm/virt.c.
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Reviewed-by: NLaszlo Ersek <lersek@redhat.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20190416091348.26075-3-armbru@redhat.com
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

hw/block/pflash_cfi01.c

@@ -44,9 +44,12 @@
 #include "qapi/error.h"
 #include "qemu/timer.h"
 #include "qemu/bitops.h"
+#include "qemu/error-report.h"
 #include "qemu/host-utils.h"
 #include "qemu/log.h"
+#include "qemu/option.h"
 #include "hw/sysbus.h"
+#include "sysemu/blockdev.h"
 #include "sysemu/sysemu.h"
 #include "trace.h"
 
@@ -968,6 +971,31 @@ MemoryRegion *pflash_cfi01_get_memory(PFlashCFI01 *fl)
     return &fl->mem;
 }
 
+/*
+ * Handle -drive if=pflash for machines that use properties.
+ * If @dinfo is null, do nothing.
+ * Else if @fl's property "drive" is already set, fatal error.
+ * Else set it to the BlockBackend with @dinfo.
+ */
+void pflash_cfi01_legacy_drive(PFlashCFI01 *fl, DriveInfo *dinfo)
+{
+    Location loc;
+
+    if (!dinfo) {
+        return;
+    }
+
+    loc_push_none(&loc);
+    qemu_opts_loc_restore(dinfo->opts);
+    if (fl->blk) {
+        error_report("clashes with -machine");
+        exit(1);
+    }
+    qdev_prop_set_drive(DEVICE(fl), "drive",
+                        blk_by_legacy_dinfo(dinfo), &error_fatal);
+    loc_pop(&loc);
+}
+
 static void postload_update_cb(void *opaque, int running, RunState state)
 {
     PFlashCFI01 *pfl = opaque;

hw/i386/pc_sysfw.c

@@ -269,9 +269,7 @@ void pc_system_firmware_init(PCMachineState *pcms,
 {
     PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
     int i;
-    DriveInfo *pflash_drv;
     BlockBackend *pflash_blk[ARRAY_SIZE(pcms->flash)];
-    Location loc;
 
     if (!pcmc->pci_enabled) {
         old_pc_system_rom_init(rom_memory, true);
@@ -280,18 +278,8 @@ void pc_system_firmware_init(PCMachineState *pcms,
 
     /* Map legacy -drive if=pflash to machine properties */
     for (i = 0; i < ARRAY_SIZE(pcms->flash); i++) {
-        pflash_drv = drive_get(IF_PFLASH, 0, i);
-        if (pflash_drv) {
-            loc_push_none(&loc);
-            qemu_opts_loc_restore(pflash_drv->opts);
-            if (pflash_cfi01_get_blk(pcms->flash[i])) {
-                error_report("clashes with -machine");
-                exit(1);
-            }
-            qdev_prop_set_drive(DEVICE(pcms->flash[i]), "drive",
-                                blk_by_legacy_dinfo(pflash_drv), &error_fatal);
-            loc_pop(&loc);
-        }
+        pflash_cfi01_legacy_drive(pcms->flash[i],
+                                  drive_get(IF_PFLASH, 0, i));
         pflash_blk[i] = pflash_cfi01_get_blk(pcms->flash[i]);
     }
 

include/hw/block/flash.h

@@ -24,6 +24,7 @@ PFlashCFI01 *pflash_cfi01_register(hwaddr base,
                                    int be);
 BlockBackend *pflash_cfi01_get_blk(PFlashCFI01 *fl);
 MemoryRegion *pflash_cfi01_get_memory(PFlashCFI01 *fl);
+void pflash_cfi01_legacy_drive(PFlashCFI01 *dev, DriveInfo *dinfo);
 
 /* pflash_cfi02.c */