1 files changed, 125 insertions, 0 deletions
diff --git a/src/cpu/kvm/device.cc b/src/cpu/kvm/device.cc
new file mode 100644
index 000000000..973bbaa64
--- /dev/null
+++ b/src/cpu/kvm/device.cc
@@ -0,0 +1,125 @@
+/*
+ * 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);
+}
+