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From: | BALATON Zoltan |
Subject: | Re: [PATCH-for-6.0] hw/ppc/mac_newworld: Restrict RAM to 2 GiB |
Date: | Tue, 6 Apr 2021 12:38:58 +0200 (CEST) |
On Tue, 6 Apr 2021, Philippe Mathieu-Daudé wrote:
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>
Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>
--- hw/ppc/mac_newworld.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/ppc/mac_newworld.c b/hw/ppc/mac_newworld.c index 21759628466..d88b38e9258 100644 --- a/hw/ppc/mac_newworld.c +++ b/hw/ppc/mac_newworld.c @@ -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 */
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