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versatilepb: do not run if user asks for more than 256MB RAM

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The versatilepb physical address space layout only has
a 256MB region for RAM before the devices. Without a guard
on the amount of RAM requested by the user we would happily
create a RAM area that overlapped with the devices, resulting
in very confusing behaviour (typically a guest crash).

Report the problem to the user if they try to request more
RAM than the board can handle (as we do already for some
other board models).

Signed-off-by: Jean-Christophe Dubois <jcd@tribudubois.net>
Message-id: 20161025093711.17407-1-jcd@tribudubois.net
[PMM: tidied up commit message, comments. Use error_report()
 rather than fprintf(stderr, ...).]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Jean-Christophe Dubois 2016-10-28 14:12:31 +01:00 committed by Peter Maydell
parent e9aff9864a
commit 5c8c2aafcf
1 changed files with 9 additions and 0 deletions
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9
hw/arm/versatilepb.c
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@ -198,6 +198,15 @@ static void versatile_init(MachineState *machine, int board_id)
int done_smc = 0;
DriveInfo *dinfo;
if (machine->ram_size > 0x10000000) {
/* Device starting at address 0x10000000,
* and memory cannot overlap with devices.
* Refuse to run rather than behaving very confusingly.
*/
error_report("versatilepb: memory size must not exceed 256MB");
exit(1);
}
if (!machine->cpu_model) {
machine->cpu_model = "arm926";
}