diff options
author | Aaron Young <Aaron.Young@oracle.com> | 2023-12-12 08:51:43 -0800 |
---|---|---|
committer | Michael S. Tsirkin <mst@redhat.com> | 2023-12-25 11:34:55 -0500 |
commit | 45e48809d3d0328fd2f113b878a62a27f1360664 (patch) | |
tree | be8be5051003d260cc9fe34d534f152b4afe008c /hw/acpi | |
parent | 51396556f0927c3d202f9903db5aa5aa8d4cbd2c (diff) |
hw/acpi: propagate vcpu hotplug after switch to modern interface
If a vcpu with an apic-id that is not supported by the legacy
interface (>255) is hot-plugged, the legacy code will dynamically switch
to the modern interface. However, the hotplug event is not forwarded to
the new interface resulting in the vcpu not being fully/properly added
to the machine config. This BUG is evidenced by OVMF when it
it attempts to count the vcpus and reports an inconsistent vcpu count
reported by the fw_cfg interface and the modern hotpug interface.
Fix is to propagate the hotplug event after making the switch from
the legacy interface to the modern interface.
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Aaron Young <aaron.young@oracle.com>
Message-Id: <0e8a9baebbb29f2a6c87fd08e43dc2ac4019759a.1702398644.git.Aaron.Young@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/acpi')
-rw-r--r-- | hw/acpi/cpu_hotplug.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/hw/acpi/cpu_hotplug.c b/hw/acpi/cpu_hotplug.c index 634bbecb31..6f78db0ccb 100644 --- a/hw/acpi/cpu_hotplug.c +++ b/hw/acpi/cpu_hotplug.c @@ -59,7 +59,8 @@ static const MemoryRegionOps AcpiCpuHotplug_ops = { }, }; -static void acpi_set_cpu_present_bit(AcpiCpuHotplug *g, CPUState *cpu) +static void acpi_set_cpu_present_bit(AcpiCpuHotplug *g, CPUState *cpu, + bool *swtchd_to_modern) { CPUClass *k = CPU_GET_CLASS(cpu); int64_t cpu_id; @@ -68,23 +69,34 @@ static void acpi_set_cpu_present_bit(AcpiCpuHotplug *g, CPUState *cpu) if ((cpu_id / 8) >= ACPI_GPE_PROC_LEN) { object_property_set_bool(g->device, "cpu-hotplug-legacy", false, &error_abort); + *swtchd_to_modern = true; return; } + *swtchd_to_modern = false; g->sts[cpu_id / 8] |= (1 << (cpu_id % 8)); } void legacy_acpi_cpu_plug_cb(HotplugHandler *hotplug_dev, AcpiCpuHotplug *g, DeviceState *dev, Error **errp) { - acpi_set_cpu_present_bit(g, CPU(dev)); - acpi_send_event(DEVICE(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS); + bool swtchd_to_modern; + Error *local_err = NULL; + + acpi_set_cpu_present_bit(g, CPU(dev), &swtchd_to_modern); + if (swtchd_to_modern) { + /* propagate the hotplug to the modern interface */ + hotplug_handler_plug(hotplug_dev, dev, &local_err); + } else { + acpi_send_event(DEVICE(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS); + } } void legacy_acpi_cpu_hotplug_init(MemoryRegion *parent, Object *owner, AcpiCpuHotplug *gpe_cpu, uint16_t base) { CPUState *cpu; + bool swtchd_to_modern; memory_region_init_io(&gpe_cpu->io, owner, &AcpiCpuHotplug_ops, gpe_cpu, "acpi-cpu-hotplug", ACPI_GPE_PROC_LEN); @@ -92,7 +104,7 @@ void legacy_acpi_cpu_hotplug_init(MemoryRegion *parent, Object *owner, gpe_cpu->device = owner; CPU_FOREACH(cpu) { - acpi_set_cpu_present_bit(gpe_cpu, cpu); + acpi_set_cpu_present_bit(gpe_cpu, cpu, &swtchd_to_modern); } } |