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charset="utf-8" Setting a new pending event will clear a previously pending event of the opposite type, for a given vCPU. Intuitively, a physical CPU cannot be in the process of both hotplugging and hot-unplugging at the same time. Signed-off-by: Eric Mackay --- hw/acpi/cpu.c | 36 ++++++++++++++++++++++++++++++++---- include/hw/acpi/cpu.h | 4 ++++ 2 files changed, 36 insertions(+), 4 deletions(-) diff --git a/hw/acpi/cpu.c b/hw/acpi/cpu.c index 5cb60ca8bc..48cb60dc38 100644 --- a/hw/acpi/cpu.c +++ b/hw/acpi/cpu.c @@ -23,6 +23,33 @@ enum { CPHP_CMD_MAX }; =20 +// Enforce mutual exclusion between is_inserting and is_removing +void acpi_cpu_set_inserting(AcpiCpuStatus *cdev, bool new_val) +{ + if (!cdev) { + return; + } + + if (new_val) { + cdev->is_removing =3D false; + } + + cdev->is_inserting =3D new_val; +} + +void acpi_cpu_set_removing(AcpiCpuStatus *cdev, bool new_val) +{ + if (!cdev) { + return; + } + + if (new_val) { + cdev->is_inserting =3D false; + } + + cdev->is_removing =3D new_val; +} + static ACPIOSTInfo *acpi_cpu_device_status(int idx, AcpiCpuStatus *cdev) { ACPIOSTInfo *info =3D g_new0(ACPIOSTInfo, 1); @@ -125,10 +152,10 @@ static void cpu_hotplug_wr(void *opaque, hwaddr addr,= uint64_t data, case ACPI_CPU_FLAGS_OFFSET_RW: /* set is_* fields */ cdev =3D &cpu_st->devs[cpu_st->selector]; if (data & 2) { /* clear insert event */ - cdev->is_inserting =3D false; + acpi_cpu_set_inserting(cdev, false); trace_cpuhp_acpi_clear_inserting_evt(cpu_st->selector); } else if (data & 4) { /* clear remove event */ - cdev->is_removing =3D false; + acpi_cpu_set_removing(cdev, false); trace_cpuhp_acpi_clear_remove_evt(cpu_st->selector); } else if (data & 8) { DeviceState *dev =3D NULL; @@ -259,7 +286,7 @@ void acpi_cpu_plug_cb(HotplugHandler *hotplug_dev, =20 cdev->cpu =3D CPU(dev); if (dev->hotplugged) { - cdev->is_inserting =3D true; + acpi_cpu_set_inserting(cdev, true); acpi_send_event(DEVICE(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS); } } @@ -272,10 +299,11 @@ void acpi_cpu_unplug_request_cb(HotplugHandler *hotpl= ug_dev, =20 cdev =3D get_cpu_status(cpu_st, dev); if (!cdev) { + warn_report("CPU status bad in unplug req cb\n"); return; } =20 - cdev->is_removing =3D true; + acpi_cpu_set_removing(cdev, true); acpi_send_event(DEVICE(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS); } =20 diff --git a/include/hw/acpi/cpu.h b/include/hw/acpi/cpu.h index 32654dc274..fde4ba4a37 100644 --- a/include/hw/acpi/cpu.h +++ b/include/hw/acpi/cpu.h @@ -39,6 +39,10 @@ typedef struct CPUHotplugState { AcpiCpuStatus *devs; } CPUHotplugState; =20 +// Enforce mutual exclusion between is_inserting and is_removing +void acpi_cpu_set_inserting(AcpiCpuStatus *cdev, bool new_val); +void acpi_cpu_set_removing(AcpiCpuStatus *cdev, bool new_val); + void acpi_cpu_plug_cb(HotplugHandler *hotplug_dev, CPUHotplugState *cpu_st, DeviceState *dev, Error **e= rrp); =20 --=20 2.43.5