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hw/ppc/mac_newworld: Restrict RAM to 2 GiB

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On Mac99 and newer machines, the Uninorth PCI host bridge maps
the PCI hole region at 2GiB, so the RAM area beside 2GiB is not
accessible by the CPU. Restrict the memory to 2GiB to avoid
problems such the one reported in the buglink.

Buglink: https://bugs.launchpad.net/qemu/+bug/1922391
Reported-by: Håvard Eidnes <he@NetBSD.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210406084842.2859664-1-f4bug@amsat.org>
Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Philippe Mathieu-Daudé 2021-04-06 10:48:42 +02:00 committed by David Gibson
parent 15106f7dc3
commit 03b3542ac9
1 changed files with 4 additions and 0 deletions
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4
hw/ppc/mac_newworld.c
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@ -157,6 +157,10 @@ static void ppc_core99_init(MachineState *machine)
}
/* allocate RAM */
if (machine->ram_size > 2 * GiB) {
error_report("RAM size more than 2 GiB is not supported");
exit(1);
}
memory_region_add_subregion(get_system_memory(), 0, machine->ram);
/* allocate and load firmware ROM */