The memory layout of the PowerNV machine is defined as :
#define KERNEL_LOAD_BASE ((void *)0x20000000)
#define KERNEL_LOAD_SIZE 0x08000000
#define INITRAMFS_LOAD_BASE KERNEL_LOAD_BASE + KERNEL_LOAD_SIZE
#define INITRAMFS_LOAD_SIZE 0x08000000
#define SKIBOOT_BASE 0x30000000
#define SKIBOOT_SIZE 0x01c10000
#define CPU_STACKS_BASE (SKIBOOT_BASE + SKIBOOT_SIZE)
#define STACK_SHIFT 15
#define STACK_SIZE (1 << STACK_SHIFT)
The overall size of the CPU stacks is (max PIR + 1) * 32K and the
machine easily reaches 800MB of minimum required RAM.
Any value below will result in a skiboot crash :
[ 0.
034949905,3] MEM: Partial overlap detected between regions:
[ 0.
034959039,3] MEM: ibm,firmware-stacks [0x31c10000-0x3a450000] (new)
[ 0.
034968576,3] MEM: ibm,firmware-allocs-memory@0 [0x31c10000-0x38400000]
[ 0.
034980367,3] Out of memory adding skiboot reserved areas
[ 0.
035074945,3] ***********************************************
[ 0.
035093627,3] < assert failed at core/mem_region.c:1129 >
[ 0.
035104247,3] .
[ 0.
035108025,3] .
[ 0.
035111651,3] .
[ 0.
035115231,3] OO__)
[ 0.
035119198,3] <"__/
[ 0.
035122980,3] ^ ^
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <
20210129111719.790692-1-clg@kaod.org>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
#include "qemu-common.h"
#include "qemu/datadir.h"
#include "qemu/units.h"
+#include "qemu/cutils.h"
#include "qapi/error.h"
#include "sysemu/qtest.h"
#include "sysemu/sysemu.h"
DeviceState *dev;
/* allocate RAM */
- if (machine->ram_size < (1 * GiB)) {
- warn_report("skiboot may not work with < 1GB of RAM");
+ if (machine->ram_size < mc->default_ram_size) {
+ char *sz = size_to_str(mc->default_ram_size);
+ error_report("Invalid RAM size, should be bigger than %s", sz);
+ g_free(sz);
+ exit(EXIT_FAILURE);
}
memory_region_add_subregion(get_system_memory(), 0, machine->ram);
* RAM defaults to less than 2048 for 32-bit hosts, and large
* enough to fit the maximum initrd size at it's load address
*/
- mc->default_ram_size = INITRD_LOAD_ADDR + INITRD_MAX_SIZE;
+ mc->default_ram_size = 1 * GiB;
mc->default_ram_id = "pnv.ram";
ispc->print_info = pnv_pic_print_info;
nc->nmi_monitor_handler = pnv_nmi;