From: Mark Cave-Ayland <mark.caveayl...@nutanix.com> Since the isapc machine is now limited to using 32-bit CPUs, add a hard restriction so that the machine cannot be started with more than 3.5G memory. This matches the default value for max_ram_below_4g if not specified and provides consistent behaviour betweem TCG and KVM accelerators.
Signed-off-by: Mark Cave-Ayland <mark.caveayl...@nutanix.com> Link: https://lore.kernel.org/r/20250828111057.468712-3-mark.caveayl...@nutanix.com Signed-off-by: Paolo Bonzini <pbonz...@redhat.com> --- hw/i386/pc_piix.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c index 8f5fb3cf90b..9a3b5d88f08 100644 --- a/hw/i386/pc_piix.c +++ b/hw/i386/pc_piix.c @@ -461,6 +461,12 @@ static void pc_init_isa(MachineState *machine) warn_report("-cpu host is invalid for isapc machine, using pentium3"); } + if (machine->ram_size > 3.5 * GiB) { + error_report("Too much memory for this machine: %" PRId64 " MiB, " + "maximum 3584 MiB", machine->ram_size / MiB); + exit(1); + } + pc_init1(machine, NULL); } #endif -- 2.51.0
