cc7e0ddf5a
Instead of assuming that we can use irqfds if and only if kvm_irqchip_in_kernel(), add a bool to the KVMState which indicates this, and is set only on x86 and only if the irqchip is in the kernel. The kernel documentation implies that the only thing you need to use KVM_IRQFD is that KVM_CAP_IRQFD is advertised, but this seems to be untrue. In particular the kernel does not (alas) return a sensible error if you try to set up an irqfd when you haven't created an irqchip. If it did we could remove all this nonsense and let the kernel return the error code. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
161 lines
2.6 KiB
C
161 lines
2.6 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-common.h"
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#include "hw/hw.h"
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#include "hw/msi.h"
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#include "cpu.h"
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#include "gdbstub.h"
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#include "kvm.h"
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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_irqfds_allowed;
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int kvm_init_vcpu(CPUArchState *env)
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{
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return -ENOSYS;
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}
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int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
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{
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return -ENOSYS;
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}
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int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
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{
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return -ENOSYS;
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}
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int kvm_init(void)
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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(CPUArchState *env)
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{
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}
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void kvm_cpu_synchronize_post_reset(CPUArchState *env)
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{
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}
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void kvm_cpu_synchronize_post_init(CPUArchState *env)
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{
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}
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int kvm_cpu_exec(CPUArchState *env)
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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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int kvm_has_pit_state2(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(CPUArchState *env, 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(CPUArchState *current_env, 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(CPUArchState *current_env, 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(CPUArchState *current_env)
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{
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}
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#ifndef _WIN32
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int kvm_set_signal_mask(CPUArchState *env, 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_set_ioeventfd_pio_word(int fd, uint16_t addr, uint16_t val, bool assign)
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{
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return -ENOSYS;
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}
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int kvm_set_ioeventfd_mmio(int fd, uint32_t adr, uint32_t val, bool assign, uint32_t len)
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{
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return -ENOSYS;
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}
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int kvm_on_sigbus_vcpu(CPUArchState *env, 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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int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
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{
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return -ENOSYS;
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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_add_irqfd(KVMState *s, int fd, int virq)
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{
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return -ENOSYS;
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}
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int kvm_irqchip_add_irq_notifier(KVMState *s, EventNotifier *n, 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(KVMState *s, int fd, int virq)
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{
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return -ENOSYS;
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}
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int kvm_irqchip_remove_irq_notifier(KVMState *s, EventNotifier *n, int virq)
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{
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return -ENOSYS;
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}
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