81cea5e7f2
.. so it could be used for adding CPU hotplug to Q35 machine Add an additional header with that will be shared between C and ASL code: include/hw/acpi/cpu_hotplug_defs.h Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
65 lines
1.7 KiB
C
65 lines
1.7 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,
|
|
},
|
|
};
|
|
|
|
void AcpiCpuHotplug_add(ACPIGPE *gpe, AcpiCpuHotplug *g, CPUState *cpu)
|
|
{
|
|
CPUClass *k = CPU_GET_CLASS(cpu);
|
|
int64_t cpu_id;
|
|
|
|
*gpe->sts = *gpe->sts | ACPI_CPU_HOTPLUG_STATUS;
|
|
cpu_id = k->get_arch_id(CPU(cpu));
|
|
g->sts[cpu_id / 8] |= (1 << (cpu_id % 8));
|
|
}
|
|
|
|
void AcpiCpuHotplug_init(MemoryRegion *parent, Object *owner,
|
|
AcpiCpuHotplug *gpe_cpu, uint16_t base)
|
|
{
|
|
CPUState *cpu;
|
|
|
|
CPU_FOREACH(cpu) {
|
|
CPUClass *cc = CPU_GET_CLASS(cpu);
|
|
int64_t id = cc->get_arch_id(cpu);
|
|
|
|
g_assert((id / 8) < ACPI_GPE_PROC_LEN);
|
|
gpe_cpu->sts[id / 8] |= (1 << (id % 8));
|
|
}
|
|
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);
|
|
}
|