4c055ab54f
In order to deal well with the kvm vcpus (which can not be removed without any protection), we do not close KVM vcpu fd, just record and mark it as stopped into a list, so that we can reuse it for the appending cpu hot-add request if possible. It is also the approach that kvm guys suggested: https://www.mail-archive.com/kvm@vger.kernel.org/msg102839.html Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com> Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Zhu Guihua <zhugh.fnst@cn.fujitsu.com> Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com> [- Explicit CPU_REMOVE() from qemu_kvm/tcg_destroy_vcpu() isn't needed as it is done from cpu_exec_exit() - Use iothread mutex instead of global mutex during destroy - Don't cleanup vCPU object from vCPU thread context but leave it to the callers (device_add/device_del)] Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
160 lines
2.7 KiB
C
160 lines
2.7 KiB
C
/*
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* QEMU KVM stub
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*
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* Copyright Red Hat, Inc. 2010
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*
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* Author: Paolo Bonzini <pbonzini@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "qemu-common.h"
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#include "cpu.h"
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#include "sysemu/kvm.h"
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#ifndef CONFIG_USER_ONLY
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#include "hw/pci/msi.h"
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#endif
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KVMState *kvm_state;
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bool kvm_kernel_irqchip;
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bool kvm_async_interrupts_allowed;
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bool kvm_eventfds_allowed;
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bool kvm_irqfds_allowed;
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bool kvm_resamplefds_allowed;
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bool kvm_msi_via_irqfd_allowed;
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bool kvm_gsi_routing_allowed;
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bool kvm_gsi_direct_mapping;
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bool kvm_allowed;
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bool kvm_readonly_mem_allowed;
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bool kvm_ioeventfd_any_length_allowed;
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int kvm_destroy_vcpu(CPUState *cpu)
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{
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return -ENOSYS;
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}
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int kvm_init_vcpu(CPUState *cpu)
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{
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return -ENOSYS;
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}
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void kvm_flush_coalesced_mmio_buffer(void)
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{
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}
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void kvm_cpu_synchronize_state(CPUState *cpu)
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{
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}
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void kvm_cpu_synchronize_post_reset(CPUState *cpu)
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{
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}
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void kvm_cpu_synchronize_post_init(CPUState *cpu)
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{
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}
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int kvm_cpu_exec(CPUState *cpu)
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{
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abort();
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}
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int kvm_has_sync_mmu(void)
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{
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return 0;
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}
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int kvm_has_many_ioeventfds(void)
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{
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return 0;
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}
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void kvm_setup_guest_memory(void *start, size_t size)
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{
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}
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int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap)
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{
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return -ENOSYS;
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}
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int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
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target_ulong len, int type)
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{
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return -EINVAL;
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}
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int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
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target_ulong len, int type)
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{
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return -EINVAL;
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}
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void kvm_remove_all_breakpoints(CPUState *cpu)
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{
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}
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#ifndef _WIN32
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int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset)
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{
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abort();
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}
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#endif
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int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
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{
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return 1;
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}
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int kvm_on_sigbus(int code, void *addr)
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{
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return 1;
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}
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#ifndef CONFIG_USER_ONLY
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int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg, PCIDevice *dev)
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{
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return -ENOSYS;
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}
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void kvm_init_irq_routing(KVMState *s)
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{
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}
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void kvm_irqchip_release_virq(KVMState *s, int virq)
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{
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}
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int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
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PCIDevice *dev)
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{
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return -ENOSYS;
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}
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int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter)
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{
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return -ENOSYS;
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}
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int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
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EventNotifier *rn, int virq)
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{
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return -ENOSYS;
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}
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int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
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int virq)
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{
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return -ENOSYS;
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}
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bool kvm_has_free_slot(MachineState *ms)
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{
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return false;
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}
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#endif
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