126 lines
3.8 KiB
C++
126 lines
3.8 KiB
C++
|
/*
|
||
|
* Copyright (c) 2015 ARM Limited
|
||
|
* All rights reserved
|
||
|
*
|
||
|
* The license below extends only to copyright in the software and shall
|
||
|
* not be construed as granting a license to any other intellectual
|
||
|
* property including but not limited to intellectual property relating
|
||
|
* to a hardware implementation of the functionality of the software
|
||
|
* licensed hereunder. You may use the software subject to the license
|
||
|
* terms below provided that you ensure that this notice is replicated
|
||
|
* unmodified and in its entirety in all distributions of the software,
|
||
|
* modified or unmodified, in source code or in binary form.
|
||
|
*
|
||
|
* Redistribution and use in source and binary forms, with or without
|
||
|
* modification, are permitted provided that the following conditions are
|
||
|
* met: redistributions of source code must retain the above copyright
|
||
|
* notice, this list of conditions and the following disclaimer;
|
||
|
* redistributions in binary form must reproduce the above copyright
|
||
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
* documentation and/or other materials provided with the distribution;
|
||
|
* neither the name of the copyright holders nor the names of its
|
||
|
* contributors may be used to endorse or promote products derived from
|
||
|
* this software without specific prior written permission.
|
||
|
*
|
||
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
*
|
||
|
* Authors: Andreas Sandberg
|
||
|
*/
|
||
|
|
||
|
#include "cpu/kvm/device.hh"
|
||
|
|
||
|
#include <linux/kvm.h>
|
||
|
#include <sys/ioctl.h>
|
||
|
#include <unistd.h>
|
||
|
|
||
|
#include <cassert>
|
||
|
#include <cerrno>
|
||
|
|
||
|
#include "base/misc.hh"
|
||
|
|
||
|
KvmDevice::KvmDevice(int _fd)
|
||
|
: fd(_fd)
|
||
|
{
|
||
|
}
|
||
|
|
||
|
KvmDevice::~KvmDevice()
|
||
|
{
|
||
|
close(fd);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
KvmDevice::getAttrPtr(uint32_t group, uint64_t attr, void *data) const
|
||
|
{
|
||
|
#ifdef KVM_GET_DEVICE_ATTR
|
||
|
struct kvm_device_attr dattr = {
|
||
|
0, // Flags
|
||
|
group,
|
||
|
attr,
|
||
|
reinterpret_cast<uint64_t>(data),
|
||
|
};
|
||
|
|
||
|
if (ioctl(KVM_GET_DEVICE_ATTR, &dattr) == -1) {
|
||
|
panic("Failed to get attribute (group: %i, attr: %i, errno: %i)",
|
||
|
group, attr, errno);
|
||
|
}
|
||
|
#else
|
||
|
panic("Kernel headers don't support KVM_GET_DEVICE_ATTR\n");
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
void
|
||
|
KvmDevice::setAttrPtr(uint32_t group, uint64_t attr, const void *data) const
|
||
|
{
|
||
|
#ifdef KVM_SET_DEVICE_ATTR
|
||
|
struct kvm_device_attr dattr = {
|
||
|
0, // Flags
|
||
|
group,
|
||
|
attr,
|
||
|
reinterpret_cast<uint64_t>(data),
|
||
|
};
|
||
|
|
||
|
if (ioctl(KVM_SET_DEVICE_ATTR, &dattr) == -1) {
|
||
|
panic("Failed to set attribute (group: %i, attr: %i, errno: %i)",
|
||
|
group, attr, errno);
|
||
|
}
|
||
|
#else
|
||
|
panic("Kernel headers don't support KVM_GET_DEVICE_ATTR\n");
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
bool
|
||
|
KvmDevice::hasAttr(uint32_t group, uint64_t attr) const
|
||
|
{
|
||
|
#ifdef KVM_HAS_DEVICE_ATTR
|
||
|
struct kvm_device_attr dattr = {
|
||
|
0, // Flags
|
||
|
group,
|
||
|
attr,
|
||
|
0, // Data address (ignored)
|
||
|
};
|
||
|
|
||
|
return ioctl(KVM_HAS_DEVICE_ATTR, &dattr) == 0;
|
||
|
#else
|
||
|
panic("Kernel headers don't support KVM_HAS_DEVICE_ATTR\n");
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
int
|
||
|
KvmDevice::ioctl(int request, long p1) const
|
||
|
{
|
||
|
assert(fd != -1);
|
||
|
|
||
|
return ::ioctl(fd, request, p1);
|
||
|
}
|
||
|
|