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-rw-r--r--src/cpu/kvm/SConscript1
-rw-r--r--src/cpu/kvm/device.cc125
-rw-r--r--src/cpu/kvm/device.hh126
-rw-r--r--src/cpu/kvm/vm.cc19
-rw-r--r--src/cpu/kvm/vm.hh11
5 files changed, 280 insertions, 2 deletions
diff --git a/src/cpu/kvm/SConscript b/src/cpu/kvm/SConscript
index 8094cc585..5bb7580be 100644
--- a/src/cpu/kvm/SConscript
+++ b/src/cpu/kvm/SConscript
@@ -44,6 +44,7 @@ if env['USE_KVM']:
SimObject('BaseKvmCPU.py')
Source('base.cc')
+ Source('device.cc')
Source('vm.cc')
Source('perfevent.cc')
Source('timer.cc')
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);
+}
+
diff --git a/src/cpu/kvm/device.hh b/src/cpu/kvm/device.hh
new file mode 100644
index 000000000..01160f010
--- /dev/null
+++ b/src/cpu/kvm/device.hh
@@ -0,0 +1,126 @@
+/*
+ * 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
+ */
+
+#ifndef __CPU_KVM_DEVICE_HH__
+#define __CPU_KVM_DEVICE_HH__
+
+#include <cstdint>
+
+/**
+ * KVM device wrapper
+ *
+ * This is a wrapper around a device emulated by KVM. Such devices can
+ * be created using KvmVM::createDevice() API. They are typically used
+ * for in-kernel interrupt controllers and similar devices.
+ *
+ * Each device has a device-specific set of attributes which are
+ * mapped into groups. The available attributes are described in the
+ * device's documentation in the kernel source tree
+ * (Documentation/virtual/kvm/devices/). Each attribute can be
+ * accessed with the getAttr() and setAttr() access methods. The
+ * presence of an attribute can be queried using the hasAttr() method.
+ */
+class KvmDevice
+{
+ public:
+ KvmDevice(int fd);
+ virtual ~KvmDevice();
+
+ public:
+ /**
+ * Get the value of an attribute
+ *
+ * See KVM's documentation, and specifically the device-specific
+ * documentation, for available attributes and attribute groups.
+ *
+ * @param group Attribute group
+ * @param attr Attribute ID within group
+ * @return Attribute value
+ */
+ template<typename T>
+ T getAttr(uint32_t group, uint64_t attr) const {
+ T data;
+ getAttrPtr(group, attr, &data);
+ return data;
+ }
+
+ /**
+ * Get the value of an attribute
+ *
+ * See KVM's documentation, and specifically the device-specific
+ * documentation, for available attributes and attribute groups.
+ *
+ * @param group Attribute group
+ * @param attr Attribute ID within group
+ * @return Attribute value
+ */
+ template<typename T>
+ void setAttr(uint32_t group, uint64_t attr, const T &data) const {
+ setAttrPtr(group, attr, &data);
+ }
+
+ void getAttrPtr(uint32_t group, uint64_t attr, void *data) const;
+ void setAttrPtr(uint32_t group, uint64_t attr, const void *data) const;
+
+ /**
+ * Check if a device attribute is valid
+ *
+ * See KVM's documentation, and specifically the device-specific
+ * documentation, for available attributes and attribute groups.
+ *
+ * @param group Attribute group
+ * @param attr Attribute ID within group
+ * @return true if attribute is valid, false otherwise.
+ */
+ bool hasAttr(uint32_t group, uint64_t attr) const;
+
+ protected:
+ int ioctl(int request, long p1) const;
+ int ioctl(int request, void *p1) const {
+ return ioctl(request, (long)p1);
+ }
+ int ioctl(int request) const {
+ return ioctl(request, 0L);
+ }
+
+ private:
+ int fd;
+};
+
+#endif // __CPU_KVM_DEVICE_HH__
diff --git a/src/cpu/kvm/vm.cc b/src/cpu/kvm/vm.cc
index 01670fab4..a12374aa5 100644
--- a/src/cpu/kvm/vm.cc
+++ b/src/cpu/kvm/vm.cc
@@ -1,6 +1,6 @@
/*
* Copyright 2014 Google, Inc.
- * Copyright (c) 2012 ARM Limited
+ * Copyright (c) 2012, 2015 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
@@ -486,6 +486,23 @@ KvmVM::setIRQLine(uint32_t irq, bool high)
}
int
+KvmVM::createDevice(uint32_t type, uint32_t flags)
+{
+#if defined(KVM_CREATE_DEVICE)
+ struct kvm_create_device dev = { type, 0, flags };
+
+ if (ioctl(KVM_CREATE_DEVICE, &dev) == -1) {
+ panic("KVM: Failed to create device (errno: %i)\n",
+ errno);
+ }
+
+ return dev.fd;
+#else
+ panic("Kernel headers don't support KVM_CREATE_DEVICE\n");
+#endif
+}
+
+int
KvmVM::createVCPU(long vcpuID)
{
int fd;
diff --git a/src/cpu/kvm/vm.hh b/src/cpu/kvm/vm.hh
index 4710f2447..d21fc2660 100644
--- a/src/cpu/kvm/vm.hh
+++ b/src/cpu/kvm/vm.hh
@@ -1,6 +1,6 @@
/*
* Copyright 2014 Google, Inc.
- * Copyright (c) 2012 ARM Limited
+ * Copyright (c) 2012, 2015 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
@@ -386,6 +386,15 @@ class KvmVM : public SimObject
*/
void freeMemSlot(const MemSlot slot);
+ /**
+ * Create an in-kernel device model.
+ *
+ * @param type Device type (KVM_DEV_TYPE_xxx)
+ * @param flags Creation flags (KVM_CREATE_DEVICE_xxx)
+ * @return Device file descriptor
+ */
+ int createDevice(uint32_t type, uint32_t flags = 0);
+
/** Global KVM interface */
Kvm kvm;