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hw/arm/xlnx-zynqmp: fix unsigned error when checking the RPUs number 

When passing --smp with a number lower than XLNX_ZYNQMP_NUM_APU_CPUS,
the expression (ms->smp.cpus - XLNX_ZYNQMP_NUM_APU_CPUS) will result
in a positive number as ms->smp.cpus is a unsigned int.
This will raise the following error afterwards, as Qemu will try to
instantiate some additional RPUs.
  | $ qemu-system-aarch64 --smp 1 -M xlnx-zcu102
  | **
  | ERROR:../src/tcg/tcg.c:777:tcg_register_thread:
  |   assertion failed: (n < tcg_max_ctxs)

Signed-off-by: Clément Chigot <chigot@adacore.com>
Reviewed-by: Francisco Iglesias <frasse.iglesias@gmail.com>
Tested-by: Francisco Iglesias <frasse.iglesias@gmail.com>
Message-id: 20230524143714.565792-1-chigot@adacore.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit c9ba1c9f02)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Clément Chigot 2023-05-24 16:37:14 +02:00 committed by Michael Tokarev
parent fee86f6c5b
commit f82dcd73e8
1 changed files with 1 additions and 1 deletions
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2
hw/arm/xlnx-zynqmp.c
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@ -213,7 +213,7 @@ static void xlnx_zynqmp_create_rpu(MachineState *ms, XlnxZynqMPState *s,
const char *boot_cpu, Error **errp)
{
int i;
int num_rpus = MIN(ms->smp.cpus - XLNX_ZYNQMP_NUM_APU_CPUS,
int num_rpus = MIN((int)(ms->smp.cpus - XLNX_ZYNQMP_NUM_APU_CPUS),
XLNX_ZYNQMP_NUM_RPU_CPUS);
if (num_rpus <= 0) {