diff options
author | Eddie Dong <eddie.dong@intel.com> | 2007-07-06 12:20:49 +0300 |
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committer | Avi Kivity <avi@qumranet.com> | 2007-10-13 10:18:24 +0200 |
commit | 85f455f7ddbed403b34b4d54b1eaf0e14126a126 (patch) | |
tree | 1dba7aa8fee3c8f756e12049c496dee5baae752c /drivers/kvm/irq.c | |
parent | 152d3f2f246ce3c2a0cf2fc6c2214663cd99aa83 (diff) | |
download | op-kernel-dev-85f455f7ddbed403b34b4d54b1eaf0e14126a126.zip op-kernel-dev-85f455f7ddbed403b34b4d54b1eaf0e14126a126.tar.gz |
KVM: Add support for in-kernel PIC emulation
Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/irq.c')
-rw-r--r-- | drivers/kvm/irq.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/kvm/irq.c b/drivers/kvm/irq.c new file mode 100644 index 0000000..b08005c --- /dev/null +++ b/drivers/kvm/irq.c @@ -0,0 +1,61 @@ +/* + * irq.c: 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/module.h> + +#include "kvm.h" +#include "irq.h" + +/* + * check if there is pending interrupt without + * intack. + */ +int kvm_cpu_has_interrupt(struct kvm_vcpu *v) +{ + struct kvm_pic *s = pic_irqchip(v->kvm); + + if (s->output) /* PIC */ + return 1; + /* + * TODO: APIC + */ + return 0; +} +EXPORT_SYMBOL_GPL(kvm_cpu_has_interrupt); + +/* + * Read pending interrupt vector and intack. + */ +int kvm_cpu_get_interrupt(struct kvm_vcpu *v) +{ + struct kvm_pic *s = pic_irqchip(v->kvm); + int vector; + + s->output = 0; + vector = kvm_pic_read_irq(s); + if (vector != -1) + return vector; + /* + * TODO: APIC + */ + return -1; +} +EXPORT_SYMBOL_GPL(kvm_cpu_get_interrupt); |