From a788260b2000f1fe826885c06f2a34df1c5b335c Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Tue, 17 Oct 2023 13:34:50 +0200 Subject: kvm: require KVM_IRQFD for kernel irqchip 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 Signed-off-by: Paolo Bonzini --- accel/kvm/kvm-all.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) (limited to 'accel/kvm/kvm-all.c') diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index 0c7b0569da..be50d47f7b 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -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); -- cgit 1.4.1