From 567a9b0a085d79c6bc9128204946cd6155960a9f Mon Sep 17 00:00:00 2001
From: Curtis Dunham <Curtis.Dunham@arm.com>
Date: Fri, 27 Jan 2017 20:21:59 +0000
Subject: arm, kvm: implement GIC state transfer

This also allows checkpointing of a Kvm GIC via the Pl390 model.

Change-Id: Ic85d81cfefad630617491b732398f5e6a5f34c0b
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/2444
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Weiping Liao <weipingliao@google.com>
---
 src/cpu/kvm/base.hh |  1 +
 src/cpu/kvm/vm.cc   | 12 +++++++++++-
 src/cpu/kvm/vm.hh   |  6 ++++++
 3 files changed, 18 insertions(+), 1 deletion(-)

(limited to 'src/cpu/kvm')

diff --git a/src/cpu/kvm/base.hh b/src/cpu/kvm/base.hh
index ef500974f..6f30c55e4 100644
--- a/src/cpu/kvm/base.hh
+++ b/src/cpu/kvm/base.hh
@@ -106,6 +106,7 @@ class BaseKvmCPU : public BaseCPU
     void deallocateContext(ThreadID thread_num);
     void haltContext(ThreadID thread_num) override;
 
+    long getVCpuID() const { return vcpuID; }
     ThreadContext *getContext(int tn) override;
 
     Counter totalInsts() const override;
diff --git a/src/cpu/kvm/vm.cc b/src/cpu/kvm/vm.cc
index 604d182ab..47e749247 100644
--- a/src/cpu/kvm/vm.cc
+++ b/src/cpu/kvm/vm.cc
@@ -50,6 +50,7 @@
 #include <cerrno>
 #include <memory>
 
+#include "cpu/kvm/base.hh"
 #include "debug/Kvm.hh"
 #include "params/KvmVM.hh"
 #include "sim/system.hh"
@@ -528,12 +529,21 @@ KvmVM::createDevice(uint32_t type, uint32_t flags)
 }
 
 void
-KvmVM::setSystem(System *s) {
+KvmVM::setSystem(System *s)
+{
     panic_if(system != nullptr, "setSystem() can only be called once");
     panic_if(s == nullptr, "setSystem() called with null System*");
     system = s;
 }
 
+long
+KvmVM::contextIdToVCpuId(ContextID ctx) const
+{
+    assert(system != nullptr);
+    return dynamic_cast<BaseKvmCPU*>
+        (system->getThreadContext(ctx)->getCpuPtr())->getVCpuID();
+}
+
 int
 KvmVM::createVCPU(long vcpuID)
 {
diff --git a/src/cpu/kvm/vm.hh b/src/cpu/kvm/vm.hh
index dbd46aa3c..df2e4119a 100644
--- a/src/cpu/kvm/vm.hh
+++ b/src/cpu/kvm/vm.hh
@@ -48,6 +48,7 @@
 
 // forward declarations
 struct KvmVMParams;
+class BaseKvmCPU;
 class System;
 
 /**
@@ -405,6 +406,11 @@ class KvmVM : public SimObject
      */
     void setSystem(System *s);
 
+    /**
+      * Get the VCPUID for a given context
+      */
+    long contextIdToVCpuId(ContextID ctx) const;
+
 #if defined(__aarch64__)
   public: // ARM-specific
     /**
-- 
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