aspeed: Create SRAM name from first CPU index

To support multiple SoC's running simultaneously, we need a unique name for
each RAM region. DRAM is created by the machine, but SRAM is created by the
SoC, since in hardware it is part of the SoC's internals.

We need a way to uniquely identify each SRAM region though, for VM
migration. Since each of the SoC's CPU's has an index which identifies it
uniquely from other CPU's in the machine, we can use the index of any of the
CPU's in the SoC to uniquely identify differentiate the SRAM name from other
SoC SRAM's. In this change, I just elected to use the index of the first CPU
in each SoC.

Signed-off-by: Peter Delevoryas <peter@pjd.dev>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220705191400.41632-3-peter@pjd.dev>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

hw/arm/aspeed_ast10x0.c

@@ -159,6 +159,7 @@ static void aspeed_soc_ast1030_realize(DeviceState *dev_soc, Error **errp)
     DeviceState *armv7m;
     Error *err = NULL;
     int i;
+    g_autofree char *sram_name = NULL;
 
     if (!clock_has_source(s->sysclk)) {
         error_setg(errp, "sysclk clock must be wired up by the board code");
@@ -183,7 +184,9 @@ static void aspeed_soc_ast1030_realize(DeviceState *dev_soc, Error **errp)
     sysbus_realize(SYS_BUS_DEVICE(&s->armv7m), &error_abort);
 
     /* Internal SRAM */
-    memory_region_init_ram(&s->sram, NULL, "aspeed.sram", sc->sram_size, &err);
+    sram_name = g_strdup_printf("aspeed.sram.%d",
+                                CPU(s->armv7m.cpu)->cpu_index);
+    memory_region_init_ram(&s->sram, OBJECT(s), sram_name, sc->sram_size, &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;

hw/arm/aspeed_ast2600.c

@@ -276,6 +276,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
     AspeedSoCClass *sc = ASPEED_SOC_GET_CLASS(s);
     Error *err = NULL;
     qemu_irq irq;
+    g_autofree char *sram_name = NULL;
 
     /* IO space */
     aspeed_mmio_map_unimplemented(s, SYS_BUS_DEVICE(&s->iomem), "aspeed.io",
@@ -335,8 +336,8 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
     }
 
     /* SRAM */
-    memory_region_init_ram(&s->sram, OBJECT(dev), "aspeed.sram",
-                           sc->sram_size, &err);
+    sram_name = g_strdup_printf("aspeed.sram.%d", CPU(&s->cpu[0])->cpu_index);
+    memory_region_init_ram(&s->sram, OBJECT(s), sram_name, sc->sram_size, &err);
     if (err) {
         error_propagate(errp, err);
         return;

hw/arm/aspeed_soc.c

@@ -239,6 +239,7 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
     AspeedSoCState *s = ASPEED_SOC(dev);
     AspeedSoCClass *sc = ASPEED_SOC_GET_CLASS(s);
     Error *err = NULL;
+    g_autofree char *sram_name = NULL;
 
     /* IO space */
     aspeed_mmio_map_unimplemented(s, SYS_BUS_DEVICE(&s->iomem), "aspeed.io",
@@ -259,8 +260,8 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
     }
 
     /* SRAM */
-    memory_region_init_ram(&s->sram, OBJECT(dev), "aspeed.sram",
-                           sc->sram_size, &err);
+    sram_name = g_strdup_printf("aspeed.sram.%d", CPU(&s->cpu[0])->cpu_index);
+    memory_region_init_ram(&s->sram, OBJECT(s), sram_name, sc->sram_size, &err);
     if (err) {
         error_propagate(errp, err);
         return;