cc43364de7
Introduce helper function acpi_set_cpu_present_bit() to simplify acpi_cpu_plug_cb and acpi_cpu_hotplug_init, so that we can keep bit setting in one place. Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com>
78 lines
2.0 KiB
C
78 lines
2.0 KiB
C
/*
|
|
* QEMU ACPI hotplug utilities
|
|
*
|
|
* Copyright (C) 2013 Red Hat Inc
|
|
*
|
|
* Authors:
|
|
* Igor Mammedov <imammedo@redhat.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*/
|
|
#include "hw/hw.h"
|
|
#include "hw/acpi/cpu_hotplug.h"
|
|
|
|
static uint64_t cpu_status_read(void *opaque, hwaddr addr, unsigned int size)
|
|
{
|
|
AcpiCpuHotplug *cpus = opaque;
|
|
uint64_t val = cpus->sts[addr];
|
|
|
|
return val;
|
|
}
|
|
|
|
static void cpu_status_write(void *opaque, hwaddr addr, uint64_t data,
|
|
unsigned int size)
|
|
{
|
|
/* TODO: implement VCPU removal on guest signal that CPU can be removed */
|
|
}
|
|
|
|
static const MemoryRegionOps AcpiCpuHotplug_ops = {
|
|
.read = cpu_status_read,
|
|
.write = cpu_status_write,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
.valid = {
|
|
.min_access_size = 1,
|
|
.max_access_size = 1,
|
|
},
|
|
};
|
|
|
|
static void acpi_set_cpu_present_bit(AcpiCpuHotplug *g, CPUState *cpu,
|
|
Error **errp)
|
|
{
|
|
CPUClass *k = CPU_GET_CLASS(cpu);
|
|
int64_t cpu_id;
|
|
|
|
cpu_id = k->get_arch_id(cpu);
|
|
if ((cpu_id / 8) >= ACPI_GPE_PROC_LEN) {
|
|
error_setg(errp, "acpi: invalid cpu id: %" PRIi64, cpu_id);
|
|
return;
|
|
}
|
|
|
|
g->sts[cpu_id / 8] |= (1 << (cpu_id % 8));
|
|
}
|
|
|
|
void acpi_cpu_plug_cb(ACPIREGS *ar, qemu_irq irq,
|
|
AcpiCpuHotplug *g, DeviceState *dev, Error **errp)
|
|
{
|
|
acpi_set_cpu_present_bit(g, CPU(dev), errp);
|
|
if (*errp != NULL) {
|
|
return;
|
|
}
|
|
|
|
ar->gpe.sts[0] |= ACPI_CPU_HOTPLUG_STATUS;
|
|
acpi_update_sci(ar, irq);
|
|
}
|
|
|
|
void acpi_cpu_hotplug_init(MemoryRegion *parent, Object *owner,
|
|
AcpiCpuHotplug *gpe_cpu, uint16_t base)
|
|
{
|
|
CPUState *cpu;
|
|
|
|
CPU_FOREACH(cpu) {
|
|
acpi_set_cpu_present_bit(gpe_cpu, cpu, &error_abort);
|
|
}
|
|
memory_region_init_io(&gpe_cpu->io, owner, &AcpiCpuHotplug_ops,
|
|
gpe_cpu, "acpi-cpu-hotplug", ACPI_GPE_PROC_LEN);
|
|
memory_region_add_subregion(parent, base, &gpe_cpu->io);
|
|
}
|