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/*
* 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 "arch/arm/kvm/gic.hh"
#include <linux/kvm.h>
#include "debug/Interrupt.hh"
#include "params/KvmGic.hh"
KvmGic::KvmGic(const KvmGicParams *p)
: BaseGic(p),
system(*p->system),
vm(*p->kvmVM),
kdev(vm.createDevice(KVM_DEV_TYPE_ARM_VGIC_V2)),
distRange(RangeSize(p->dist_addr, KVM_VGIC_V2_DIST_SIZE)),
cpuRange(RangeSize(p->cpu_addr, KVM_VGIC_V2_CPU_SIZE)),
addrRanges{distRange, cpuRange}
{
kdev.setAttr<uint64_t>(
KVM_DEV_ARM_VGIC_GRP_ADDR, KVM_VGIC_V2_ADDR_TYPE_DIST,
p->dist_addr);
kdev.setAttr<uint64_t>(
KVM_DEV_ARM_VGIC_GRP_ADDR, KVM_VGIC_V2_ADDR_TYPE_CPU,
p->cpu_addr);
}
KvmGic::~KvmGic()
{
}
void
KvmGic::serialize(std::ostream &os)
{
panic("Checkpointing unsupported\n");
}
void
KvmGic::unserialize(Checkpoint *cp, const std::string &sec)
{
panic("Checkpointing unsupported\n");
}
Tick
KvmGic::read(PacketPtr pkt)
{
panic("KvmGic: PIO from gem5 is currently unsupported\n");
}
Tick
KvmGic::write(PacketPtr pkt)
{
panic("KvmGic: PIO from gem5 is currently unsupported\n");
}
void
KvmGic::sendInt(uint32_t num)
{
DPRINTF(Interrupt, "Set SPI %d\n", num);
setIntState(KVM_ARM_IRQ_TYPE_SPI, 0, num, true);
}
void
KvmGic::clearInt(uint32_t num)
{
DPRINTF(Interrupt, "Clear SPI %d\n", num);
setIntState(KVM_ARM_IRQ_TYPE_SPI, 0, num, false);
}
void
KvmGic::sendPPInt(uint32_t num, uint32_t cpu)
{
DPRINTF(Interrupt, "Set PPI %d:%d\n", cpu, num);
setIntState(KVM_ARM_IRQ_TYPE_PPI, cpu, num, true);
}
void
KvmGic::clearPPInt(uint32_t num, uint32_t cpu)
{
DPRINTF(Interrupt, "Clear PPI %d:%d\n", cpu, num);
setIntState(KVM_ARM_IRQ_TYPE_PPI, cpu, num, false);
}
void
KvmGic::verifyMemoryMode() const
{
if (!(system.isAtomicMode() && system.bypassCaches())) {
fatal("The in-kernel KVM GIC can only be used with KVM CPUs, but the "
"current memory mode does not support KVM.\n");
}
}
void
KvmGic::setIntState(uint8_t type, uint8_t vcpu, uint16_t irq, bool high)
{
assert(type < KVM_ARM_IRQ_TYPE_MASK);
assert(vcpu < KVM_ARM_IRQ_VCPU_MASK);
assert(irq < KVM_ARM_IRQ_NUM_MASK);
const uint32_t line(
(type << KVM_ARM_IRQ_TYPE_SHIFT) |
(vcpu << KVM_ARM_IRQ_VCPU_SHIFT) |
(irq << KVM_ARM_IRQ_NUM_SHIFT));
vm.setIRQLine(line, high);
}
KvmGic *
KvmGicParams::create()
{
return new KvmGic(this);
}
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