arm: Add support for ARMv8 (AArch64 & AArch32)

Note: AArch64 and AArch32 interworking is not supported. If you use an AArch64
kernel you are restricted to AArch64 user-mode binaries. This will be addressed
in a later patch.

Note: Virtualization is only supported in AArch32 mode. This will also be fixed
in a later patch.

Contributors:
Giacomo Gabrielli    (TrustZone, LPAE, system-level AArch64, AArch64 NEON, validation)
Thomas Grocutt       (AArch32 Virtualization, AArch64 FP, validation)
Mbou Eyole           (AArch64 NEON, validation)
Ali Saidi            (AArch64 Linux support, code integration, validation)
Edmund Grimley-Evans (AArch64 FP)
William Wang         (AArch64 Linux support)
Rene De Jong         (AArch64 Linux support, performance opt.)
Matt Horsnell        (AArch64 MP, validation)
Matt Evans           (device models, code integration, validation)
Chris Adeniyi-Jones  (AArch64 syscall-emulation)
Prakash Ramrakhyani  (validation)
Dam Sunwoo           (validation)
Chander Sudanthi     (validation)
Stephan Diestelhorst (validation)
Andreas Hansson      (code integration, performance opt.)
Eric Van Hensbergen  (performance opt.)
Gabe Black

1 files changed, 553 insertions, 0 deletions

diff --git a/src/dev/arm/vgic.cc b/src/dev/arm/vgic.cc
new file mode 100644
index 000000000..2faf2030e
--- /dev/null
+++ b/src/dev/arm/vgic.cc
@@ -0,0 +1,553 @@
+/*
+ * Copyright (c) 2013 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: Matt Evans
+ */
+
+#include "base/trace.hh"
+#include "debug/Checkpoint.hh"
+#include "debug/VGIC.hh"
+#include "dev/arm/base_gic.hh"
+#include "dev/arm/vgic.hh"
+#include "dev/terminal.hh"
+#include "mem/packet.hh"
+#include "mem/packet_access.hh"
+
+VGic::VGic(const Params *p)
+    : PioDevice(p), platform(p->platform), gic(p->gic), vcpuAddr(p->vcpu_addr),
+      hvAddr(p->hv_addr), pioDelay(p->pio_delay),
+      maintInt(p->ppint)
+{
+    for (int x = 0; x < VGIC_CPU_MAX; x++) {
+        postVIntEvent[x] = new PostVIntEvent(x, p->platform);
+        maintIntPosted[x] = false;
+        vIntPosted[x] = false;
+    }
+    for (int c = 0; c < VGIC_CPU_MAX; c++) {
+        memset(&vcpuData[c], 0, sizeof(struct vcpuIntData));
+    }
+    assert(sys->numRunningContexts() <= VGIC_CPU_MAX);
+}
+
+Tick
+VGic::read(PacketPtr pkt)
+{
+    Addr addr = pkt->getAddr();
+
+    if (addr >= vcpuAddr && addr < vcpuAddr + GICV_SIZE)
+        return readVCpu(pkt);
+    else if (addr >= hvAddr && addr < hvAddr + GICH_REG_SIZE)
+        return readCtrl(pkt);
+    else
+        panic("Read to unknown address %#x\n", pkt->getAddr());
+}
+
+Tick
+VGic::write(PacketPtr pkt)
+{
+    Addr addr = pkt->getAddr();
+
+    if (addr >= vcpuAddr && addr < vcpuAddr + GICV_SIZE)
+        return writeVCpu(pkt);
+    else if (addr >= hvAddr && addr < hvAddr + GICH_REG_SIZE)
+        return writeCtrl(pkt);
+    else
+        panic("Write to unknown address %#x\n", pkt->getAddr());
+}
+
+Tick
+VGic::readVCpu(PacketPtr pkt)
+{
+    Addr daddr = pkt->getAddr() - vcpuAddr;
+    pkt->allocate();
+
+    int ctx_id = pkt->req->contextId();
+    assert(ctx_id < VGIC_CPU_MAX);
+    struct vcpuIntData *vid = &vcpuData[ctx_id];
+
+    DPRINTF(VGIC, "VGIC VCPU read register %#x\n", daddr);
+
+    switch (daddr) {
+      case GICV_CTLR:
+        pkt->set<uint32_t>(vid->vctrl);
+        break;
+      case GICV_IAR: {
+          int i = findHighestPendingLR(vid);
+          if (i < 0 || !vid->vctrl.En) {
+              pkt->set<uint32_t>(1023); // "No int" marker
+          } else {
+              ListReg *lr = &vid->LR[i];
+
+              pkt->set<uint32_t>(lr->VirtualID |
+                                 (((int)lr->CpuID) << 10));
+              // We don't support auto-EOI of HW interrupts via real GIC!
+              // Fortunately, KVM doesn't use this.  How about Xen...? Ulp!
+              if (lr->HW)
+                  panic("VGIC does not support 'HW' List Register feature (LR %#x)!\n",
+                        *lr);
+              lr->State = LR_ACTIVE;
+              DPRINTF(VGIC, "Consumed interrupt %d (cpu%d) from LR%d (EOI%d)\n",
+                      lr->VirtualID, lr->CpuID, i, lr->EOI);
+          }
+      } break;
+      default:
+        panic("VGIC VCPU read of bad address %#x\n", daddr);
+    }
+
+    updateIntState(ctx_id);
+
+    pkt->makeAtomicResponse();
+    return pioDelay;
+}
+
+Tick
+VGic::readCtrl(PacketPtr pkt)
+{
+    Addr daddr = pkt->getAddr() - hvAddr;
+    pkt->allocate();
+
+    int ctx_id = pkt->req->contextId();
+
+    DPRINTF(VGIC, "VGIC HVCtrl read register %#x\n", daddr);
+
+    /* Munge the address: 0-0xfff is the usual space banked by requester CPU.
+     * Anything > that is 0x200-sized slices of 'per CPU' regs.
+     */
+    if (daddr & ~0x1ff) {
+        ctx_id = (daddr >> 9);
+        if (ctx_id > 8)
+            panic("VGIC: Weird unbanked hv ctrl address %#x!\n", daddr);
+        daddr &= ~0x1ff;
+    }
+    assert(ctx_id < VGIC_CPU_MAX);
+    struct vcpuIntData *vid = &vcpuData[ctx_id];
+
+    switch (daddr) {
+      case GICH_HCR:
+        pkt->set<uint32_t>(vid->hcr);
+        break;
+
+      case GICH_VTR:
+        pkt->set<uint32_t>(0x44000000 | (NUM_LR - 1));
+        break;
+
+      case GICH_VMCR:
+        pkt->set<uint32_t>(
+            ((uint32_t)vid->VMPriMask << 27) |
+            ((uint32_t)vid->VMBP << 21) |
+            ((uint32_t)vid->VMABP << 18) |
+            ((uint32_t)vid->VEM << 9) |
+            ((uint32_t)vid->VMCBPR << 4) |
+            ((uint32_t)vid->VMFiqEn << 3) |
+            ((uint32_t)vid->VMAckCtl << 2) |
+            ((uint32_t)vid->VMGrp1En << 1) |
+            ((uint32_t)vid->VMGrp0En << 0)
+            );
+        break;
+
+      case GICH_MISR:
+        pkt->set<uint32_t>(getMISR(vid));
+        break;
+
+      case GICH_EISR0:
+        pkt->set<uint32_t>(vid->eisr & 0xffffffff);
+        break;
+
+      case GICH_EISR1:
+        pkt->set<uint32_t>(vid->eisr >> 32);
+        break;
+
+      case GICH_ELSR0: {
+          uint32_t bm = 0;
+          for (int i = 0; i < ((NUM_LR < 32) ? NUM_LR : 32); i++) {
+              if (!vid->LR[i].State)
+                  bm |= 1 << i;
+          }
+          pkt->set<uint32_t>(bm);
+      } break;
+
+      case GICH_ELSR1: {
+          uint32_t bm = 0;
+          for (int i = 32; i < NUM_LR; i++) {
+              if (!vid->LR[i].State)
+                  bm |= 1 << (i-32);
+          }
+          pkt->set<uint32_t>(bm);
+      } break;
+
+      case GICH_APR0:
+        warn_once("VGIC GICH_APR read!\n");
+        pkt->set<uint32_t>(0);
+        break;
+
+      case GICH_LR0:
+      case GICH_LR1:
+      case GICH_LR2:
+      case GICH_LR3:
+        pkt->set<uint32_t>(vid->LR[(daddr - GICH_LR0) >> 2]);
+        break;
+
+      default:
+        panic("VGIC HVCtrl read of bad address %#x\n", daddr);
+    }
+
+    pkt->makeAtomicResponse();
+    return pioDelay;
+}
+
+Tick
+VGic::writeVCpu(PacketPtr pkt)
+{
+    Addr daddr = pkt->getAddr() - vcpuAddr;
+    pkt->allocate();
+
+    int ctx_id = pkt->req->contextId();
+    assert(ctx_id < VGIC_CPU_MAX);
+    struct vcpuIntData *vid = &vcpuData[ctx_id];
+
+    DPRINTF(VGIC, "VGIC VCPU write register %#x <= %#x\n", daddr, pkt->get<uint32_t>());
+
+    switch (daddr) {
+      case GICV_CTLR:
+        vid->vctrl = pkt->get<uint32_t>();
+        break;
+      case GICV_PMR:
+        vid->VMPriMask = pkt->get<uint32_t>();
+        break;
+      case GICV_EOIR: {
+          // We don't handle the split EOI-then-DIR mode.  Linux (guest)
+          // doesn't need it though.
+          assert(!vid->vctrl.EOImode);
+          uint32_t w = pkt->get<uint32_t>();
+          unsigned int virq = w & 0x3ff;
+          unsigned int vcpu = (w >> 10) & 7;
+          int i = findLRForVIRQ(vid, virq, vcpu);
+          if (i < 0) {
+              DPRINTF(VGIC, "EOIR: No LR for irq %d(cpu%d)\n", virq, vcpu);
+          } else {
+              DPRINTF(VGIC, "EOIR: Found LR%d for irq %d(cpu%d)\n", i, virq, vcpu);
+              ListReg *lr = &vid->LR[i];
+              lr->State = 0;
+              // Maintenance interrupt -- via eisr -- is flagged when
+              // LRs have EOI=1 and State=INVALID!
+          }
+      } break;
+      default:
+        panic("VGIC VCPU write %#x to unk address %#x\n", pkt->get<uint32_t>(), daddr);
+    }
+
+    // This updates the EISRs and flags IRQs:
+    updateIntState(ctx_id);
+
+    pkt->makeAtomicResponse();
+    return pioDelay;
+}
+
+Tick
+VGic::writeCtrl(PacketPtr pkt)
+{
+    Addr daddr = pkt->getAddr() - hvAddr;
+    pkt->allocate();
+
+    int ctx_id = pkt->req->contextId();
+
+    DPRINTF(VGIC, "VGIC HVCtrl write register %#x <= %#x\n", daddr, pkt->get<uint32_t>());
+
+    /* Munge the address: 0-0xfff is the usual space banked by requester CPU.
+     * Anything > that is 0x200-sized slices of 'per CPU' regs.
+     */
+    if (daddr & ~0x1ff) {
+        ctx_id = (daddr >> 9);
+        if (ctx_id > 8)
+            panic("VGIC: Weird unbanked hv ctrl address %#x!\n", daddr);
+        daddr &= ~0x1ff;
+    }
+    assert(ctx_id < VGIC_CPU_MAX);
+    struct vcpuIntData *vid = &vcpuData[ctx_id];
+
+    switch (daddr) {
+      case GICH_HCR:
+        vid->hcr = pkt->get<uint32_t>();
+        // update int state
+        break;
+
+      case GICH_VMCR: {
+          uint32_t d = pkt->get<uint32_t>();
+          vid->VMPriMask = d >> 27;
+          vid->VMBP = (d >> 21) & 7;
+          vid->VMABP = (d >> 18) & 7;
+          vid->VEM = (d >> 9) & 1;
+          vid->VMCBPR = (d >> 4) & 1;
+          vid->VMFiqEn = (d >> 3) & 1;
+          vid->VMAckCtl = (d >> 2) & 1;
+          vid->VMGrp1En = (d >> 1) & 1;
+          vid->VMGrp0En = d & 1;
+      } break;
+
+      case GICH_APR0:
+        warn_once("VGIC GICH_APR0 written, ignored\n");
+        break;
+
+      case GICH_LR0:
+      case GICH_LR1:
+      case GICH_LR2:
+      case GICH_LR3:
+        vid->LR[(daddr - GICH_LR0) >> 2] = pkt->get<uint32_t>();
+        // update int state
+        break;
+
+      default:
+        panic("VGIC HVCtrl write to bad address %#x\n", daddr);
+    }
+
+    updateIntState(ctx_id);
+
+    pkt->makeAtomicResponse();
+    return pioDelay;
+}
+
+
+uint32_t
+VGic::getMISR(struct vcpuIntData *vid)
+{
+    return (!!vid->hcr.VGrp1DIE && !vid->VMGrp1En ? 0x80 : 0) |
+        (!!vid->hcr.VGrp1EIE &&  vid->VMGrp1En ? 0x40 : 0) |
+        (!!vid->hcr.VGrp0DIE && !vid->VMGrp0En ? 0x20 : 0) |
+        (!!vid->hcr.VGrp0EIE &&  vid->VMGrp0En ? 0x10 : 0) |
+        (!!vid->hcr.NPIE && !lrPending(vid) ? 0x08 : 0) |
+        (!!vid->hcr.LRENPIE && vid->hcr.EOICount ? 0x04 : 0) |
+        (!!vid->hcr.UIE && lrValid(vid) <= 1 ? 0x02 : 0) |
+        (vid->eisr ? 0x01 : 0);
+}
+
+void
+VGic::postVInt(uint32_t cpu, Tick when)
+{
+    DPRINTF(VGIC, "Posting VIRQ to %d\n", cpu);
+    if (!(postVIntEvent[cpu]->scheduled()))
+        eventq->schedule(postVIntEvent[cpu], when);
+}
+
+void
+VGic::unPostVInt(uint32_t cpu)
+{
+    DPRINTF(VGIC, "Unposting VIRQ to %d\n", cpu);
+    platform->intrctrl->clear(cpu, ArmISA::INT_VIRT_IRQ, 0);
+}
+
+void
+VGic::postMaintInt(uint32_t cpu)
+{
+    DPRINTF(VGIC, "Posting maintenance PPI to GIC/cpu%d\n", cpu);
+    // Linux DT configures this as Level.
+    gic->sendPPInt(maintInt, cpu);
+}
+
+void
+VGic::unPostMaintInt(uint32_t cpu)
+{
+    DPRINTF(VGIC, "Unposting maintenance PPI to GIC/cpu%d\n", cpu);
+    gic->clearPPInt(maintInt, cpu);
+}
+
+/* Update state (in general); something concerned with ctx_id has changed.
+ * This may raise a maintenance interrupt.
+ */
+void
+VGic::updateIntState(int ctx_id)
+{
+    // @todo This should update APRs!
+
+    // Build EISR contents:
+    // (Cached so that regs can read them without messing about again)
+    struct vcpuIntData *tvid = &vcpuData[ctx_id];
+
+    tvid->eisr = 0;
+    for (int i = 0; i < NUM_LR; i++) {
+        if (!tvid->LR[i].State && tvid->LR[i].EOI) {
+            tvid->eisr |= 1 << i;
+        }
+    }
+
+    assert(sys->numRunningContexts() <= VGIC_CPU_MAX);
+    for (int i = 0; i < sys->numRunningContexts(); i++) {
+        struct vcpuIntData *vid = &vcpuData[i];
+        // Are any LRs active that weren't before?
+        if (!vIntPosted[i]) {
+            if (lrPending(vid) && vid->vctrl.En) {
+                vIntPosted[i] = true;
+                postVInt(i, curTick() + 1);
+            }
+        } else if (!lrPending(vid)) {
+            vIntPosted[i] = false;
+            unPostVInt(i);
+        }
+
+        // Any maintenance ints to send?
+        if (!maintIntPosted[i]) {
+            if (vid->hcr.En && getMISR(vid)) {
+                maintIntPosted[i] = true;
+                postMaintInt(i);
+            }
+        } else {
+            if (!vid->hcr.En || !getMISR(vid)) {
+                unPostMaintInt(i);
+                maintIntPosted[i] = false;
+            }
+        }
+    }
+}
+
+AddrRangeList
+VGic::getAddrRanges() const
+{
+    AddrRangeList ranges;
+    ranges.push_back(RangeSize(hvAddr, GICH_REG_SIZE));
+    ranges.push_back(RangeSize(vcpuAddr, GICV_SIZE));
+    return ranges;
+}
+
+void
+VGic::serialize(std::ostream &os)
+{
+    Tick interrupt_time[VGIC_CPU_MAX];
+    for (uint32_t cpu = 0; cpu < VGIC_CPU_MAX; cpu++) {
+        interrupt_time[cpu] = 0;
+        if (postVIntEvent[cpu]->scheduled()) {
+            interrupt_time[cpu] = postVIntEvent[cpu]->when();
+        }
+    }
+
+    DPRINTF(Checkpoint, "Serializing VGIC\n");
+
+    SERIALIZE_ARRAY(interrupt_time, VGIC_CPU_MAX);
+    SERIALIZE_ARRAY(maintIntPosted, VGIC_CPU_MAX);
+    SERIALIZE_ARRAY(vIntPosted, VGIC_CPU_MAX);
+    SERIALIZE_SCALAR(vcpuAddr);
+    SERIALIZE_SCALAR(hvAddr);
+    SERIALIZE_SCALAR(pioDelay);
+    SERIALIZE_SCALAR(maintInt);
+
+    for (uint32_t cpu = 0; cpu < VGIC_CPU_MAX; cpu++) {
+        nameOut(os, csprintf("%s.vcpuData%d", name(), cpu));
+        uint32_t vctrl_val = vcpuData[cpu].vctrl;
+        SERIALIZE_SCALAR(vctrl_val);
+        uint32_t hcr_val = vcpuData[cpu].hcr;
+        SERIALIZE_SCALAR(hcr_val);
+        uint64_t eisr_val = vcpuData[cpu].eisr;
+        SERIALIZE_SCALAR(eisr_val);
+        uint8_t VMGrp0En_val = vcpuData[cpu].VMGrp0En;
+        SERIALIZE_SCALAR(VMGrp0En_val);
+        uint8_t VMGrp1En_val = vcpuData[cpu].VMGrp1En;
+        SERIALIZE_SCALAR(VMGrp1En_val);
+        uint8_t VMAckCtl_val = vcpuData[cpu].VMAckCtl;
+        SERIALIZE_SCALAR(VMAckCtl_val);
+        uint8_t VMFiqEn_val = vcpuData[cpu].VMFiqEn;
+        SERIALIZE_SCALAR(VMFiqEn_val);
+        uint8_t VMCBPR_val = vcpuData[cpu].VMCBPR;
+        SERIALIZE_SCALAR(VMCBPR_val);
+        uint8_t VEM_val = vcpuData[cpu].VEM;
+        SERIALIZE_SCALAR(VEM_val);
+        uint8_t VMABP_val = vcpuData[cpu].VMABP;
+        SERIALIZE_SCALAR(VMABP_val);
+        uint8_t VMBP_val = vcpuData[cpu].VMBP;
+        SERIALIZE_SCALAR(VMBP_val);
+        uint8_t VMPriMask_val = vcpuData[cpu].VMPriMask;
+        SERIALIZE_SCALAR(VMPriMask_val);
+
+        for (int i = 0; i < NUM_LR; i++) {
+            uint32_t lr = vcpuData[cpu].LR[i];
+            nameOut(os, csprintf("%s.vcpuData%d.LR%d", name(), cpu, i));
+            SERIALIZE_SCALAR(lr);
+        }
+    }
+}
+
+void VGic::unserialize(Checkpoint *cp, const std::string &section)
+{
+    DPRINTF(Checkpoint, "Unserializing Arm GIC\n");
+
+    Tick interrupt_time[VGIC_CPU_MAX];
+    UNSERIALIZE_ARRAY(interrupt_time, VGIC_CPU_MAX);
+    for (uint32_t cpu = 0; cpu < VGIC_CPU_MAX; cpu++) {
+        if (interrupt_time[cpu])
+            schedule(postVIntEvent[cpu], interrupt_time[cpu]);
+
+        uint32_t tmp;
+        paramIn(cp, csprintf("%s.vcpuData%d", section, cpu),
+                "vctrl_val", tmp);
+        vcpuData[cpu].vctrl = tmp;
+        paramIn(cp, csprintf("%s.vcpuData%d", section, cpu),
+                "hcr_val", tmp);
+        vcpuData[cpu].hcr = tmp;
+        paramIn(cp, csprintf("%s.vcpuData%d", section, cpu),
+                "eisr_val", vcpuData[cpu].eisr);
+        paramIn(cp, csprintf("%s.vcpuData%d", section, cpu),
+                "VMGrp0En_val", vcpuData[cpu].VMGrp0En);
+        paramIn(cp, csprintf("%s.vcpuData%d", section, cpu),
+                "VMGrp1En_val", vcpuData[cpu].VMGrp1En);
+        paramIn(cp, csprintf("%s.vcpuData%d", section, cpu),
+                "VMAckCtl_val", vcpuData[cpu].VMAckCtl);
+        paramIn(cp, csprintf("%s.vcpuData%d", section, cpu),
+                "VMFiqEn_val", vcpuData[cpu].VMFiqEn);
+        paramIn(cp, csprintf("%s.vcpuData%d", section, cpu),
+                "VMCBPR_val", vcpuData[cpu].VMCBPR);
+        paramIn(cp, csprintf("%s.vcpuData%d", section, cpu),
+                "VEM_val", vcpuData[cpu].VEM);
+        paramIn(cp, csprintf("%s.vcpuData%d", section, cpu),
+                "VMABP_val", vcpuData[cpu].VMABP);
+        paramIn(cp, csprintf("%s.vcpuData%d", section, cpu),
+                "VMPriMask_val", vcpuData[cpu].VMPriMask);
+
+        for (int i = 0; i < NUM_LR; i++) {
+            paramIn(cp, csprintf("%s.vcpuData%d.LR%d", section, cpu, i),
+                    "lr", tmp);
+            vcpuData[cpu].LR[i] = tmp;
+        }
+    }
+    UNSERIALIZE_ARRAY(maintIntPosted, VGIC_CPU_MAX);
+    UNSERIALIZE_ARRAY(vIntPosted, VGIC_CPU_MAX);
+    UNSERIALIZE_SCALAR(vcpuAddr);
+    UNSERIALIZE_SCALAR(hvAddr);
+    UNSERIALIZE_SCALAR(pioDelay);
+    UNSERIALIZE_SCALAR(maintInt);
+}
+
+VGic *
+VGicParams::create()
+{
+    return new VGic(this);
+}