[PATCH 2/5] hw/arm/aspeed: Do not sysbus-map mmio flash region directly, use alias

[Philippe Mathieu-Daudé]

The flash mmio region is exposed as an AddressSpace.
AddressSpaces must not be sysbus-mapped, therefore map
the region using an alias.
Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org>
---
 include/hw/ssi/aspeed_smc.h | 1 +
 hw/ssi/aspeed_smc.c         | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/hw/ssi/aspeed_smc.h b/include/hw/ssi/aspeed_smc.h
index 16c03fe64f3..e3c96cecbd8 100644
--- a/include/hw/ssi/aspeed_smc.h
+++ b/include/hw/ssi/aspeed_smc.h
@@ -84,6 +84,7 @@ struct AspeedSMCState {
 
     MemoryRegion mmio;
     MemoryRegion mmio_flash;
+    MemoryRegion mmio_flash_alias;
 
     qemu_irq irq;
     int irqline;
diff --git a/hw/ssi/aspeed_smc.c b/hw/ssi/aspeed_smc.c
index 16addee4dc8..aa26578bdac 100644
--- a/hw/ssi/aspeed_smc.c
+++ b/hw/ssi/aspeed_smc.c
@@ -1386,7 +1386,9 @@ static void aspeed_smc_realize(DeviceState *dev, Error 
**errp)
     memory_region_init_io(&s->mmio_flash, OBJECT(s),
                           &aspeed_smc_flash_default_ops, s, name,
                           s->ctrl->flash_window_size);
-    sysbus_init_mmio(sbd, &s->mmio_flash);
+    memory_region_init_alias(&s->mmio_flash_alias, OBJECT(s), name,
+                             &s->mmio_flash, 0, s->ctrl->flash_window_size);
+    sysbus_init_mmio(sbd, &s->mmio_flash_alias);
 
     s->flashes = g_new0(AspeedSMCFlash, s->ctrl->max_peripherals);
 
-- 
2.26.2