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kvm: require KVM_IRQFD for kernel irqchip

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KVM_IRQFD was introduced in Linux 2.6.32, and since then it has always been
available on architectures that support an in-kernel interrupt controller.
We can require it unconditionally.

Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2023-10-17 13:34:50 +02:00
parent cc5e719e2c
commit a788260b20
5 changed files with 10 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

13
accel/kvm/kvm-all.c
View file

@ -91,7 +91,6 @@ bool kvm_split_irqchip;
bool kvm_async_interrupts_allowed;
bool kvm_halt_in_kernel_allowed;
bool kvm_eventfds_allowed;
bool kvm_irqfds_allowed;
bool kvm_resamplefds_allowed;
bool kvm_msi_via_irqfd_allowed;
bool kvm_gsi_routing_allowed;
@ -2128,10 +2127,6 @@ static int kvm_irqchip_assign_irqfd(KVMState *s, EventNotifier *event,
}
}
if (!kvm_irqfds_enabled()) {
return -ENOSYS;
}
return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd);
}
@ -2292,6 +2287,11 @@ static void kvm_irqchip_create(KVMState *s)
return;
}
if (kvm_check_extension(s, KVM_CAP_IRQFD) <= 0) {
fprintf(stderr, "kvm: irqfd not implemented\n");
exit(1);
}
/* First probe and see if there's a arch-specific hook to create the
* in-kernel irqchip for us */
ret = kvm_arch_irqchip_create(s);
@ -2589,9 +2589,6 @@ static int kvm_init(MachineState *ms)
kvm_eventfds_allowed =
(kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0);
kvm_irqfds_allowed =
(kvm_check_extension(s, KVM_CAP_IRQFD) > 0);
kvm_resamplefds_allowed =
(kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0);