diff options
Diffstat (limited to 'accel/kvm/kvm-all.c')
| -rw-r--r-- | accel/kvm/kvm-all.c | 47 |
1 files changed, 0 insertions, 47 deletions
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index 50717a0d63..05be687be1 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -1253,43 +1253,6 @@ static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val, } -static int kvm_check_many_ioeventfds(void) -{ - /* Userspace can use ioeventfd for io notification. This requires a host - * that supports eventfd(2) and an I/O thread; since eventfd does not - * support SIGIO it cannot interrupt the vcpu. - * - * Older kernels have a 6 device limit on the KVM io bus. Find out so we - * can avoid creating too many ioeventfds. - */ -#if defined(CONFIG_EVENTFD) - int ioeventfds[7]; - int i, ret = 0; - for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { - ioeventfds[i] = eventfd(0, EFD_CLOEXEC); - if (ioeventfds[i] < 0) { - break; - } - ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true); - if (ret < 0) { - close(ioeventfds[i]); - break; - } - } - - /* Decide whether many devices are supported or not */ - ret = i == ARRAY_SIZE(ioeventfds); - - while (i-- > 0) { - kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true); - close(ioeventfds[i]); - } - return ret; -#else - return 0; -#endif -} - static const KVMCapabilityInfo * kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) { @@ -2648,8 +2611,6 @@ static int kvm_init(MachineState *ms) memory_listener_register(&kvm_coalesced_pio_listener, &address_space_io); - s->many_ioeventfds = kvm_check_many_ioeventfds(); - s->sync_mmu = !!kvm_vm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); if (!s->sync_mmu) { ret = ram_block_discard_disable(true); @@ -3218,14 +3179,6 @@ int kvm_max_nested_state_length(void) return kvm_state->max_nested_state_len; } -int kvm_has_many_ioeventfds(void) -{ - if (!kvm_enabled()) { - return 0; - } - return kvm_state->many_ioeventfds; -} - int kvm_has_gsi_routing(void) { #ifdef KVM_CAP_IRQ_ROUTING |