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arm/aspeed: actually check RAM size

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It's supposed that SOC will check if "-m" provided
RAM size is valid by setting "ram-size" property and
then board would read back valid (possibly corrected
value) to map RAM MemoryReging with valid size.
It isn't doing so, since check is called only
indirectly from
  aspeed_sdmc_reset()->asc->compute_conf()
or much later when guest writes to configuration
register.

So depending on "-m" value QEMU end-ups with a warning
and an invalid MemoryRegion size allocated and mapped.
(examples:
 -M ast2500-evb -m 1M
    0000000080000000-000000017ffffffe (prio 0, i/o): aspeed-ram-container
      0000000080000000-00000000800fffff (prio 0, ram): ram
      0000000080100000-00000000bfffffff (prio 0, i/o): max_ram
 -M ast2500-evb -m 3G
    0000000080000000-000000017ffffffe (prio 0, i/o): aspeed-ram-container
      0000000080000000-000000013fffffff (prio 0, ram): ram
      [DETECTED OVERFLOW!] 0000000140000000-00000000bfffffff (prio 0, i/o): max_ram
)
On top of that sdmc falls back and reports to guest
"default" size, it thinks machine should have.

This patch makes ram-size check actually work and
changes behavior from a warning later on during
machine reset to error_fatal at the moment SOC.ram-size
is set so user will have to fix RAM size on CLI
to start machine.

It also gets out of the way mutable ram-size logic,
so we could consolidate RAM allocation logic around
pre-allocated hostmem backend (supplied by user or
auto created by generic machine code depending on
supplied -m/mem-path/mem-prealloc options.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200219160953.13771-10-imammedo@redhat.com>
This commit is contained in:
Igor Mammedov 2020-02-19 11:08:43 -05:00 committed by Patchew Importer
parent b844d822cf
commit 533eb415df
3 changed files with 70 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
hw/arm/aspeed.c
View File

@ -204,8 +204,12 @@ static void aspeed_machine_init(MachineState *machine)
sc = ASPEED_SOC_GET_CLASS(&bmc->soc);
/*
* This will error out if isize is not supported by memory controller.
*/
object_property_set_uint(OBJECT(&bmc->soc), ram_size, "ram-size",
&error_abort);
&error_fatal);
object_property_set_int(OBJECT(&bmc->soc), amc->hw_strap1, "hw-strap1",
&error_abort);
object_property_set_int(OBJECT(&bmc->soc), amc->hw_strap2, "hw-strap2",
@ -228,13 +232,6 @@ static void aspeed_machine_init(MachineState *machine)
object_property_set_bool(OBJECT(&bmc->soc), true, "realized",
&error_abort);
/*
* Allocate RAM after the memory controller has checked the size
* was valid. If not, a default value is used.
*/
ram_size = object_property_get_uint(OBJECT(&bmc->soc), "ram-size",
&error_abort);
memory_region_allocate_system_memory(&bmc->ram, NULL, "ram", ram_size);
memory_region_add_subregion(&bmc->ram_container, 0, &bmc->ram);
memory_region_add_subregion(get_system_memory(),

83
hw/misc/aspeed_sdmc.c
View File

@ -17,6 +17,9 @@
#include "migration/vmstate.h"
#include "qapi/error.h"
#include "trace.h"
#include "qemu/units.h"
#include "qemu/cutils.h"
#include "qapi/visitor.h"
/* Protection Key Register */
#define R_PROT (0x00 / 4)
@ -160,14 +163,9 @@ static int ast2400_rambits(AspeedSDMCState *s)
case 512:
return ASPEED_SDMC_DRAM_512MB;
default:
g_assert_not_reached();
break;
}
/* use a common default */
warn_report("Invalid RAM size 0x%" PRIx64 ". Using default 256M",
s->ram_size);
s->ram_size = 256 << 20;
return ASPEED_SDMC_DRAM_256MB;
}
static int ast2500_rambits(AspeedSDMCState *s)
@ -182,14 +180,9 @@ static int ast2500_rambits(AspeedSDMCState *s)
case 1024:
return ASPEED_SDMC_AST2500_1024MB;
default:
g_assert_not_reached();
break;
}
/* use a common default */
warn_report("Invalid RAM size 0x%" PRIx64 ". Using default 512M",
s->ram_size);
s->ram_size = 512 << 20;
return ASPEED_SDMC_AST2500_512MB;
}
static int ast2600_rambits(AspeedSDMCState *s)
@ -204,14 +197,9 @@ static int ast2600_rambits(AspeedSDMCState *s)
case 2048:
return ASPEED_SDMC_AST2600_2048MB;
default:
g_assert_not_reached();
break;
}
/* use a common default */
warn_report("Invalid RAM size 0x%" PRIx64 ". Using default 1024M",
s->ram_size);
s->ram_size = 1024 << 20;
return ASPEED_SDMC_AST2600_1024MB;
}
static void aspeed_sdmc_reset(DeviceState *dev)
@ -225,6 +213,51 @@ static void aspeed_sdmc_reset(DeviceState *dev)
s->regs[R_CONF] = asc->compute_conf(s, 0);
}
static void aspeed_sdmc_get_ram_size(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
AspeedSDMCState *s = ASPEED_SDMC(obj);
int64_t value = s->ram_size;
visit_type_int(v, name, &value, errp);
}
static void aspeed_sdmc_set_ram_size(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
int i;
char *sz;
int64_t value;
Error *local_err = NULL;
AspeedSDMCState *s = ASPEED_SDMC(obj);
AspeedSDMCClass *asc = ASPEED_SDMC_GET_CLASS(s);
visit_type_int(v, name, &value, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
for (i = 0; asc->valid_ram_sizes[i]; i++) {
if (value == asc->valid_ram_sizes[i]) {
s->ram_size = value;
return;
}
}
sz = size_to_str(value);
error_setg(&local_err, "Invalid RAM size %s", sz);
g_free(sz);
error_propagate(errp, local_err);
}
static void aspeed_sdmc_initfn(Object *obj)
{
object_property_add(obj, "ram-size", "int",
aspeed_sdmc_get_ram_size, aspeed_sdmc_set_ram_size,
NULL, NULL, NULL);
}
static void aspeed_sdmc_realize(DeviceState *dev, Error **errp)
{
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
@ -249,7 +282,6 @@ static const VMStateDescription vmstate_aspeed_sdmc = {
};
static Property aspeed_sdmc_properties[] = {
DEFINE_PROP_UINT64("ram-size", AspeedSDMCState, ram_size, 0),
DEFINE_PROP_UINT64("max-ram-size", AspeedSDMCState, max_ram_size, 0),
DEFINE_PROP_END_OF_LIST(),
};
@ -268,6 +300,7 @@ static const TypeInfo aspeed_sdmc_info = {
.name = TYPE_ASPEED_SDMC,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(AspeedSDMCState),
.instance_init = aspeed_sdmc_initfn,
.class_init = aspeed_sdmc_class_init,
.class_size = sizeof(AspeedSDMCClass),
.abstract = true,
@ -298,6 +331,9 @@ static void aspeed_2400_sdmc_write(AspeedSDMCState *s, uint32_t reg,
s->regs[reg] = data;
}
static const uint64_t
aspeed_2400_ram_sizes[] = { 64 * MiB, 128 * MiB, 256 * MiB, 512 * MiB, 0};
static void aspeed_2400_sdmc_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
@ -307,6 +343,7 @@ static void aspeed_2400_sdmc_class_init(ObjectClass *klass, void *data)
asc->max_ram_size = 512 << 20;
asc->compute_conf = aspeed_2400_sdmc_compute_conf;
asc->write = aspeed_2400_sdmc_write;
asc->valid_ram_sizes = aspeed_2400_ram_sizes;
}
static const TypeInfo aspeed_2400_sdmc_info = {
@ -351,6 +388,9 @@ static void aspeed_2500_sdmc_write(AspeedSDMCState *s, uint32_t reg,
s->regs[reg] = data;
}
static const uint64_t
aspeed_2500_ram_sizes[] = { 128 * MiB, 256 * MiB, 512 * MiB, 1024 * MiB, 0};
static void aspeed_2500_sdmc_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
@ -360,6 +400,7 @@ static void aspeed_2500_sdmc_class_init(ObjectClass *klass, void *data)
asc->max_ram_size = 1024 << 20;
asc->compute_conf = aspeed_2500_sdmc_compute_conf;
asc->write = aspeed_2500_sdmc_write;
asc->valid_ram_sizes = aspeed_2500_ram_sizes;
}
static const TypeInfo aspeed_2500_sdmc_info = {
@ -404,6 +445,9 @@ static void aspeed_2600_sdmc_write(AspeedSDMCState *s, uint32_t reg,
s->regs[reg] = data;
}
static const uint64_t
aspeed_2600_ram_sizes[] = { 256 * MiB, 512 * MiB, 1024 * MiB, 2048 * MiB, 0};
static void aspeed_2600_sdmc_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
@ -413,6 +457,7 @@ static void aspeed_2600_sdmc_class_init(ObjectClass *klass, void *data)
asc->max_ram_size = 2048 << 20;
asc->compute_conf = aspeed_2600_sdmc_compute_conf;
asc->write = aspeed_2600_sdmc_write;
asc->valid_ram_sizes = aspeed_2600_ram_sizes;
}
static const TypeInfo aspeed_2600_sdmc_info = {

1
include/hw/misc/aspeed_sdmc.h
View File

@ -40,6 +40,7 @@ typedef struct AspeedSDMCClass {
SysBusDeviceClass parent_class;
uint64_t max_ram_size;
const uint64_t *valid_ram_sizes;
uint32_t (*compute_conf)(AspeedSDMCState *s, uint32_t data);
void (*write)(AspeedSDMCState *s, uint32_t reg, uint32_t data);
} AspeedSDMCClass;