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-rw-r--r--src/arch/arm/kvm/KvmGic.py8
-rw-r--r--src/arch/arm/kvm/gic.cc149
-rw-r--r--src/arch/arm/kvm/gic.hh47
3 files changed, 200 insertions, 4 deletions
diff --git a/src/arch/arm/kvm/KvmGic.py b/src/arch/arm/kvm/KvmGic.py
index 9ae52db22..d4cbd6c8b 100644
--- a/src/arch/arm/kvm/KvmGic.py
+++ b/src/arch/arm/kvm/KvmGic.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2015 ARM Limited
+# Copyright (c) 2015, 2017 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
@@ -38,7 +38,7 @@
from m5.params import *
from m5.proxy import *
-from Gic import BaseGic
+from Gic import BaseGic, Pl390
from KvmVM import KvmVM
from System import System
@@ -52,3 +52,7 @@ class KvmGic(BaseGic):
system = Param.System(Parent.any,
'System this interrupt controller belongs to')
+
+class MuxingKvmGic(Pl390):
+ type = 'MuxingKvmGic'
+ cxx_header = "arch/arm/kvm/gic.hh"
diff --git a/src/arch/arm/kvm/gic.cc b/src/arch/arm/kvm/gic.cc
index c5a30879c..7bc1ba59f 100644
--- a/src/arch/arm/kvm/gic.cc
+++ b/src/arch/arm/kvm/gic.cc
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015-2016 ARM Limited
+ * Copyright (c) 2015-2017 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
@@ -35,14 +35,17 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Andreas Sandberg
+ * Curtis Dunham
*/
#include "arch/arm/kvm/gic.hh"
#include <linux/kvm.h>
+#include "arch/arm/kvm/base_cpu.hh"
#include "debug/Interrupt.hh"
#include "params/KvmGic.hh"
+#include "params/MuxingKvmGic.hh"
KvmKernelGicV2::KvmKernelGicV2(KvmVM &_vm, Addr cpu_addr, Addr dist_addr,
unsigned it_lines)
@@ -183,3 +186,147 @@ KvmGicParams::create()
{
return new KvmGic(this);
}
+
+
+MuxingKvmGic::MuxingKvmGic(const MuxingKvmGicParams *p)
+ : Pl390(p),
+ system(*p->system),
+ kernelGic(nullptr),
+ usingKvm(false)
+{
+ if (auto vm = system.getKvmVM()) {
+ kernelGic = new KvmKernelGicV2(*vm, p->cpu_addr, p->dist_addr,
+ p->it_lines);
+ }
+}
+
+MuxingKvmGic::~MuxingKvmGic()
+{
+}
+
+void
+MuxingKvmGic::startup()
+{
+ usingKvm = (kernelGic != nullptr) && validKvmEnvironment();
+}
+
+void
+MuxingKvmGic::drainResume()
+{
+ bool use_kvm = (kernelGic != nullptr) && validKvmEnvironment();
+ if (use_kvm != usingKvm) {
+ if (use_kvm) // from simulation to KVM emulation
+ fromPl390ToKvm();
+ else // from KVM emulation to simulation
+ fromKvmToPl390();
+
+ usingKvm = use_kvm;
+ }
+}
+
+void
+MuxingKvmGic::serialize(CheckpointOut &cp) const
+{
+ if (!usingKvm)
+ return Pl390::serialize(cp);
+
+ panic("Checkpointing unsupported\n");
+}
+
+void
+MuxingKvmGic::unserialize(CheckpointIn &cp)
+{
+ if (!usingKvm)
+ return Pl390::unserialize(cp);
+
+ panic("Checkpointing unsupported\n");
+}
+
+Tick
+MuxingKvmGic::read(PacketPtr pkt)
+{
+ if (!usingKvm)
+ return Pl390::read(pkt);
+
+ panic("MuxingKvmGic: PIO from gem5 is currently unsupported\n");
+}
+
+Tick
+MuxingKvmGic::write(PacketPtr pkt)
+{
+ if (!usingKvm)
+ return Pl390::write(pkt);
+
+ panic("MuxingKvmGic: PIO from gem5 is currently unsupported\n");
+}
+
+void
+MuxingKvmGic::sendInt(uint32_t num)
+{
+ if (!usingKvm)
+ return Pl390::sendInt(num);
+
+ DPRINTF(Interrupt, "Set SPI %d\n", num);
+ kernelGic->setSPI(num);
+}
+
+void
+MuxingKvmGic::clearInt(uint32_t num)
+{
+ if (!usingKvm)
+ return Pl390::clearInt(num);
+
+ DPRINTF(Interrupt, "Clear SPI %d\n", num);
+ kernelGic->clearSPI(num);
+}
+
+void
+MuxingKvmGic::sendPPInt(uint32_t num, uint32_t cpu)
+{
+ if (!usingKvm)
+ return Pl390::sendPPInt(num, cpu);
+ DPRINTF(Interrupt, "Set PPI %d:%d\n", cpu, num);
+ kernelGic->setPPI(cpu, num);
+}
+
+void
+MuxingKvmGic::clearPPInt(uint32_t num, uint32_t cpu)
+{
+ if (!usingKvm)
+ return Pl390::clearPPInt(num, cpu);
+
+ DPRINTF(Interrupt, "Clear PPI %d:%d\n", cpu, num);
+ kernelGic->clearPPI(cpu, num);
+}
+
+bool
+MuxingKvmGic::validKvmEnvironment() const
+{
+ if (system.threadContexts.empty())
+ return false;
+
+ for (auto tc : system.threadContexts) {
+ if (dynamic_cast<BaseArmKvmCPU*>(tc->getCpuPtr()) == nullptr) {
+ return false;
+ }
+ }
+ return true;
+}
+
+void
+MuxingKvmGic::fromPl390ToKvm()
+{
+ panic("Gic multiplexing not implemented.\n");
+}
+
+void
+MuxingKvmGic::fromKvmToPl390()
+{
+ panic("Gic multiplexing not implemented.\n");
+}
+
+MuxingKvmGic *
+MuxingKvmGicParams::create()
+{
+ return new MuxingKvmGic(this);
+}
diff --git a/src/arch/arm/kvm/gic.hh b/src/arch/arm/kvm/gic.hh
index d6922b24b..fc09da6a0 100644
--- a/src/arch/arm/kvm/gic.hh
+++ b/src/arch/arm/kvm/gic.hh
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015-2016 ARM Limited
+ * Copyright (c) 2015-2017 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
@@ -35,6 +35,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Andreas Sandberg
+ * Curtis Dunham
*/
#ifndef __ARCH_ARM_KVM_GIC_HH__
@@ -44,6 +45,7 @@
#include "cpu/kvm/device.hh"
#include "cpu/kvm/vm.hh"
#include "dev/arm/base_gic.hh"
+#include "dev/arm/gic_pl390.hh"
#include "dev/platform.hh"
/**
@@ -205,4 +207,47 @@ class KvmGic : public BaseGic
const AddrRangeList addrRanges;
};
+struct MuxingKvmGicParams;
+
+class MuxingKvmGic : public Pl390
+{
+ public: // SimObject / Serializable / Drainable
+ MuxingKvmGic(const MuxingKvmGicParams *p);
+ ~MuxingKvmGic();
+
+ void startup() override;
+ void drainResume() override;
+
+ void serialize(CheckpointOut &cp) const override;
+ void unserialize(CheckpointIn &cp) override;
+
+ public: // PioDevice
+ Tick read(PacketPtr pkt) override;
+ Tick write(PacketPtr pkt) override;
+
+ public: // Pl390
+ void sendInt(uint32_t num) override;
+ void clearInt(uint32_t num) override;
+
+ void sendPPInt(uint32_t num, uint32_t cpu) override;
+ void clearPPInt(uint32_t num, uint32_t cpu) override;
+
+ protected:
+ /** Verify gem5 configuration will support KVM emulation */
+ bool validKvmEnvironment() const;
+
+ /** System this interrupt controller belongs to */
+ System &system;
+
+ /** Kernel GIC device */
+ KvmKernelGicV2 *kernelGic;
+
+ private:
+ bool usingKvm;
+
+ /** Multiplexing implementation: state transfer functions */
+ void fromPl390ToKvm();
+ void fromKvmToPl390();
+};
+
#endif // __ARCH_ARM_KVM_GIC_HH__
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 11:47:32 +0000