[PATCH] aspeed: Create SRAM name from first CPU index

[Peter Delevoryas]

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 <me@pjd.dev>
---
 hw/arm/aspeed_ast10x0.c | 5 ++++-
 hw/arm/aspeed_ast2600.c | 5 +++--
 hw/arm/aspeed_soc.c     | 5 +++--
 3 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/hw/arm/aspeed_ast10x0.c b/hw/arm/aspeed_ast10x0.c
index 33ef331771..b6b6f0d053 100644
--- a/hw/arm/aspeed_ast10x0.c
+++ b/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;
+    char name[64];
 
     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);
+    snprintf(name, sizeof(name), "aspeed.sram.%d",
+             CPU(s->armv7m.cpu)->cpu_index);
+    memory_region_init_ram(&s->sram, NULL, name, sc->sram_size, &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
diff --git a/hw/arm/aspeed_ast2600.c b/hw/arm/aspeed_ast2600.c
index 3f0611ac11..7efb9f888a 100644
--- a/hw/arm/aspeed_ast2600.c
+++ b/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;
+    char name[64];
 
     /* 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);
+    snprintf(name, sizeof(name), "aspeed.sram.%d", CPU(&s->cpu[0])->cpu_index);
+    memory_region_init_ram(&s->sram, OBJECT(dev), name, sc->sram_size, &err);
     if (err) {
         error_propagate(errp, err);
         return;
diff --git a/hw/arm/aspeed_soc.c b/hw/arm/aspeed_soc.c
index 0f675e7fcd..1ddba33d2a 100644
--- a/hw/arm/aspeed_soc.c
+++ b/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;
+    char name[64];
 
     /* 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);
+    snprintf(name, sizeof(name), "aspeed.sram.%d", CPU(&s->cpu[0])->cpu_index);
+    memory_region_init_ram(&s->sram, OBJECT(dev), name, sc->sram_size, &err);
     if (err) {
         error_propagate(errp, err);
         return;
-- 
2.37.0