/* * 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_assert((cpu_id / 8) < ACPI_GPE_PROC_LEN); 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); }