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kvm: require KVM_CAP_IOEVENTFD and KVM_CAP_IOEVENTFD_ANY_LENGTH

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KVM_CAP_IOEVENTFD_ANY_LENGTH was added in Linux 4.4, released in 2016.
Assume that it is present.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2023-10-17 14:13:04 +02:00
parent 5d9ec1f4c7
commit 126e7f7803
9 changed files with 18 additions and 78 deletions
Download patch file Download diff file Expand all files Collapse all files

22
accel/kvm/kvm-all.c
View file

@ -90,7 +90,6 @@ bool kvm_kernel_irqchip;
bool kvm_split_irqchip;
bool kvm_async_interrupts_allowed;
bool kvm_halt_in_kernel_allowed;
bool kvm_eventfds_allowed;
bool kvm_resamplefds_allowed;
bool kvm_msi_via_irqfd_allowed;
bool kvm_gsi_routing_allowed;
@ -98,7 +97,6 @@ bool kvm_gsi_direct_mapping;
bool kvm_allowed;
bool kvm_readonly_mem_allowed;
bool kvm_vm_attributes_allowed;
bool kvm_ioeventfd_any_length_allowed;
bool kvm_msi_use_devid;
bool kvm_has_guest_debug;
static int kvm_sstep_flags;
@ -110,6 +108,8 @@ static const KVMCapabilityInfo kvm_required_capabilites[] = {
KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS),
KVM_CAP_INFO(JOIN_MEMORY_REGIONS_WORKS),
KVM_CAP_INFO(INTERNAL_ERROR_DATA),
KVM_CAP_INFO(IOEVENTFD),
KVM_CAP_INFO(IOEVENTFD_ANY_LENGTH),
KVM_CAP_LAST_INFO
};
@ -2547,18 +2547,12 @@ static int kvm_init(MachineState *ms)
kvm_readonly_mem_allowed =
(kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0);
kvm_eventfds_allowed =
(kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0);
kvm_resamplefds_allowed =
(kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0);
kvm_vm_attributes_allowed =
(kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0);
kvm_ioeventfd_any_length_allowed =
(kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0);
#ifdef KVM_CAP_SET_GUEST_DEBUG
kvm_has_guest_debug =
(kvm_check_extension(s, KVM_CAP_SET_GUEST_DEBUG) > 0);
@ -2595,19 +2589,15 @@ static int kvm_init(MachineState *ms)
kvm_irqchip_create(s);
}
if (kvm_eventfds_allowed) {
s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add;
s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del;
}
s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add;
s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del;
s->memory_listener.listener.coalesced_io_add = kvm_coalesce_mmio_region;
s->memory_listener.listener.coalesced_io_del = kvm_uncoalesce_mmio_region;
kvm_memory_listener_register(s, &s->memory_listener,
&address_space_memory, 0, "kvm-memory");
if (kvm_eventfds_allowed) {
memory_listener_register(&kvm_io_listener,
&address_space_io);
}
memory_listener_register(&kvm_io_listener,
&address_space_io);
memory_listener_register(&kvm_coalesced_pio_listener,
&address_space_io);