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q35: catch invalid cpu hotplug configuration

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Related: https://bugzilla.redhat.com//show_bug.cgi?id=1985924
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-Id: <20210812102341.3316254-1-kraxel@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Gerd Hoffmann 2021-08-12 12:23:41 +02:00 committed by Michael S. Tsirkin
parent aa29466b48
commit 67cebca328
1 changed files with 13 additions and 0 deletions
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13
hw/isa/lpc_ich9.c
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@ -31,6 +31,7 @@
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "cpu.h"
#include "qapi/error.h"
#include "qapi/visitor.h"
#include "qemu/range.h"
#include "hw/isa/isa.h"
@ -676,6 +677,18 @@ static void ich9_lpc_realize(PCIDevice *d, Error **errp)
DeviceState *dev = DEVICE(d);
ISABus *isa_bus;
if ((lpc->smi_host_features & BIT_ULL(ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT)) &&
!(lpc->smi_host_features & BIT_ULL(ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT))) {
/*
* smi_features_ok_callback() throws an error on this.
*
* So bail out here instead of advertizing the invalid
* configuration and get obscure firmware failures from that.
*/
error_setg(errp, "cpu hot-unplug requires cpu hot-plug");
return;
}
isa_bus = isa_bus_new(DEVICE(d), get_system_memory(), get_system_io(),
errp);
if (!isa_bus) {