diff options
author | Xiantao Zhang <xiantao.zhang@intel.com> | 2008-10-06 13:48:45 +0800 |
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committer | Avi Kivity <avi@redhat.com> | 2008-10-15 14:25:35 +0200 |
commit | 3de42dc094ecd313dc7d551e007a134b52f8663d (patch) | |
tree | cba836b4cd719e6a98f640fecec41ce5d23d9ce7 /virt/kvm/irq_comm.c | |
parent | c77fb9dc7a0383c86eabef30272a763a482403e1 (diff) | |
download | lwn-3de42dc094ecd313dc7d551e007a134b52f8663d.tar.gz lwn-3de42dc094ecd313dc7d551e007a134b52f8663d.zip |
KVM: Separate irq ack notification out of arch/x86/kvm/irq.c
Moving irq ack notification logic as common, and make
it shared with ia64 side.
Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'virt/kvm/irq_comm.c')
-rw-r--r-- | virt/kvm/irq_comm.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c new file mode 100644 index 000000000000..d0169f5e6047 --- /dev/null +++ b/virt/kvm/irq_comm.c @@ -0,0 +1,60 @@ +/* + * irq_comm.c: Common API for in kernel interrupt controller + * Copyright (c) 2007, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., 59 Temple + * Place - Suite 330, Boston, MA 02111-1307 USA. + * Authors: + * Yaozu (Eddie) Dong <Eddie.dong@intel.com> + * + */ + +#include <linux/kvm_host.h> +#include "irq.h" + +#include "ioapic.h" + +/* This should be called with the kvm->lock mutex held */ +void kvm_set_irq(struct kvm *kvm, int irq, int level) +{ + /* Not possible to detect if the guest uses the PIC or the + * IOAPIC. So set the bit in both. The guest will ignore + * writes to the unused one. + */ + kvm_ioapic_set_irq(kvm->arch.vioapic, irq, level); +#ifdef CONFIG_X86 + kvm_pic_set_irq(pic_irqchip(kvm), irq, level); +#endif +} + +void kvm_notify_acked_irq(struct kvm *kvm, unsigned gsi) +{ + struct kvm_irq_ack_notifier *kian; + struct hlist_node *n; + + hlist_for_each_entry(kian, n, &kvm->arch.irq_ack_notifier_list, link) + if (kian->gsi == gsi) + kian->irq_acked(kian); +} + +void kvm_register_irq_ack_notifier(struct kvm *kvm, + struct kvm_irq_ack_notifier *kian) +{ + hlist_add_head(&kian->link, &kvm->arch.irq_ack_notifier_list); +} + +void kvm_unregister_irq_ack_notifier(struct kvm *kvm, + struct kvm_irq_ack_notifier *kian) +{ + hlist_del(&kian->link); +} |