/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License.
 *
 * This program is distributed in the hope that 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, see <http://www.gnu.org/licenses/>.
 */

#ifndef __KVM_IODEV_H__
#define __KVM_IODEV_H__

#include <linux/kvm_types.h>
#include <linux/errno.h>

struct kvm_io_device;
struct kvm_vcpu;

/**
 * kvm_io_device_ops are called under kvm slots_lock.
 * read and write handlers return 0 if the transaction has been handled,
 * or non-zero to have it passed to the next device.
 **/
struct kvm_io_device_ops {
	int (*read)(struct kvm_vcpu *vcpu,
		    struct kvm_io_device *this,
		    gpa_t addr,
		    int len,
		    void *val);
	int (*write)(struct kvm_vcpu *vcpu,
		     struct kvm_io_device *this,
		     gpa_t addr,
		     int len,
		     const void *val);
	void (*destructor)(struct kvm_io_device *this);
};


struct kvm_io_device {
	const struct kvm_io_device_ops *ops;
};

static inline void kvm_iodevice_init(struct kvm_io_device *dev,
				     const struct kvm_io_device_ops *ops)
{
	dev->ops = ops;
}

static inline int kvm_iodevice_read(struct kvm_vcpu *vcpu,
				    struct kvm_io_device *dev, gpa_t addr,
				    int l, void *v)
{
	return dev->ops->read ? dev->ops->read(vcpu, dev, addr, l, v)
				: -EOPNOTSUPP;
}

static inline int kvm_iodevice_write(struct kvm_vcpu *vcpu,
				     struct kvm_io_device *dev, gpa_t addr,
				     int l, const void *v)
{
	return dev->ops->write ? dev->ops->write(vcpu, dev, addr, l, v)
				 : -EOPNOTSUPP;
}

static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
{
	if (dev->ops->destructor)
		dev->ops->destructor(dev);
}

#endif /* __KVM_IODEV_H__ */
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<tr><th>author</th><td>Yang Zhang &lt;yang.zhang.wz@gmail.com&gt;</td><td class='right'>2016-06-13 09:56:56 +0800</td></tr>
<tr><th>committer</th><td>Paolo Bonzini &lt;pbonzini@redhat.com&gt;</td><td class='right'>2016-06-16 09:38:24 +0200</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=a0052191624e9bf8a8f9dc41b92ab5f252566c3c'>a0052191624e9bf8a8f9dc41b92ab5f252566c3c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=a0052191624e9bf8a8f9dc41b92ab5f252566c3c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=a0052191624e9bf8a8f9dc41b92ab5f252566c3c'>04ae5479a427b120592c6d9381d7f0f2c3b8e70f</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=caf1ff26e1aa178133df68ac3d40815fed2187d9'>caf1ff26e1aa178133df68ac3d40815fed2187d9</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=a0052191624e9bf8a8f9dc41b92ab5f252566c3c&amp;id2=caf1ff26e1aa178133df68ac3d40815fed2187d9'>diff</a>)</td></tr></table>
<div class='commit-subject'>kvm: vmx: check apicv is active before using VT-d posted interrupt</div><div class='commit-msg'>VT-d posted interrupt is relying on the CPU side's posted interrupt.
Need to check whether VCPU's APICv is active before enabing VT-d
posted interrupt.

Fixes: d62caabb41f33d96333f9ef15e09cd26e1c12760
Cc: stable@vger.kernel.org
Signed-off-by: Yang Zhang &lt;yang.zhang.wz@gmail.com&gt;
Signed-off-by: Shengge Ding &lt;shengge.dsg@alibaba-inc.com&gt;
Signed-off-by: Paolo Bonzini &lt;pbonzini@redhat.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=a0052191624e9bf8a8f9dc41b92ab5f252566c3c'>Diffstat</a></div><table summary='diffstat' class='diffstat'>