KVM: ia64: Add kvm arch-specific core code for kvm/ia64
Xiantao Zhang [Tue, 1 Apr 2008 07:29:29 +0000 (15:29 +0800)]
kvm_ia64.c is created to handle kvm ia64-specific core logic.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

arch/ia64/kvm/kvm-ia64.c [new file with mode: 0644]

diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
new file mode 100644 (file)
index 0000000..9c56b64
--- /dev/null
@@ -0,0 +1,1789 @@
+
+/*
+ * kvm_ia64.c: Basic KVM suppport On Itanium series processors
+ *
+ *
+ *     Copyright (C) 2007, Intel Corporation.
+ *     Xiantao Zhang  (xiantao.zhang@intel.com)
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/percpu.h>
+#include <linux/gfp.h>
+#include <linux/fs.h>
+#include <linux/smp.h>
+#include <linux/kvm_host.h>
+#include <linux/kvm.h>
+#include <linux/bitops.h>
+#include <linux/hrtimer.h>
+#include <linux/uaccess.h>
+
+#include <asm/pgtable.h>
+#include <asm/gcc_intrin.h>
+#include <asm/pal.h>
+#include <asm/cacheflush.h>
+#include <asm/div64.h>
+#include <asm/tlb.h>
+
+#include "misc.h"
+#include "vti.h"
+#include "iodev.h"
+#include "ioapic.h"
+#include "lapic.h"
+
+static unsigned long kvm_vmm_base;
+static unsigned long kvm_vsa_base;
+static unsigned long kvm_vm_buffer;
+static unsigned long kvm_vm_buffer_size;
+unsigned long kvm_vmm_gp;
+
+static long vp_env_info;
+
+static struct kvm_vmm_info *kvm_vmm_info;
+
+static DEFINE_PER_CPU(struct kvm_vcpu *, last_vcpu);
+
+struct kvm_stats_debugfs_item debugfs_entries[] = {
+       { NULL }
+};
+
+
+struct fdesc{
+    unsigned long ip;
+    unsigned long gp;
+};
+
+static void kvm_flush_icache(unsigned long start, unsigned long len)
+{
+       int l;
+
+       for (l = 0; l < (len + 32); l += 32)
+               ia64_fc(start + l);
+
+       ia64_sync_i();
+       ia64_srlz_i();
+}
+
+static void kvm_flush_tlb_all(void)
+{
+       unsigned long i, j, count0, count1, stride0, stride1, addr;
+       long flags;
+
+       addr    = local_cpu_data->ptce_base;
+       count0  = local_cpu_data->ptce_count[0];
+       count1  = local_cpu_data->ptce_count[1];
+       stride0 = local_cpu_data->ptce_stride[0];
+       stride1 = local_cpu_data->ptce_stride[1];
+
+       local_irq_save(flags);
+       for (i = 0; i < count0; ++i) {
+               for (j = 0; j < count1; ++j) {
+                       ia64_ptce(addr);
+                       addr += stride1;
+               }
+               addr += stride0;
+       }
+       local_irq_restore(flags);
+       ia64_srlz_i();                  /* srlz.i implies srlz.d */
+}
+
+long ia64_pal_vp_create(u64 *vpd, u64 *host_iva, u64 *opt_handler)
+{
+       struct ia64_pal_retval iprv;
+
+       PAL_CALL_STK(iprv, PAL_VP_CREATE, (u64)vpd, (u64)host_iva,
+                       (u64)opt_handler);
+
+       return iprv.status;
+}
+
+static  DEFINE_SPINLOCK(vp_lock);
+
+void kvm_arch_hardware_enable(void *garbage)
+{
+       long  status;
+       long  tmp_base;
+       unsigned long pte;
+       unsigned long saved_psr;
+       int slot;
+
+       pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
+                               PAGE_KERNEL));
+       local_irq_save(saved_psr);
+       slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
+       if (slot < 0)
+               return;
+       local_irq_restore(saved_psr);
+
+       spin_lock(&vp_lock);
+       status = ia64_pal_vp_init_env(kvm_vsa_base ?
+                               VP_INIT_ENV : VP_INIT_ENV_INITALIZE,
+                       __pa(kvm_vm_buffer), KVM_VM_BUFFER_BASE, &tmp_base);
+       if (status != 0) {
+               printk(KERN_WARNING"kvm: Failed to Enable VT Support!!!!\n");
+               return ;
+       }
+
+       if (!kvm_vsa_base) {
+               kvm_vsa_base = tmp_base;
+               printk(KERN_INFO"kvm: kvm_vsa_base:0x%lx\n", kvm_vsa_base);
+       }
+       spin_unlock(&vp_lock);
+       ia64_ptr_entry(0x3, slot);
+}
+
+void kvm_arch_hardware_disable(void *garbage)
+{
+
+       long status;
+       int slot;
+       unsigned long pte;
+       unsigned long saved_psr;
+       unsigned long host_iva = ia64_getreg(_IA64_REG_CR_IVA);
+
+       pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
+                               PAGE_KERNEL));
+
+       local_irq_save(saved_psr);
+       slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
+       if (slot < 0)
+               return;
+       local_irq_restore(saved_psr);
+
+       status = ia64_pal_vp_exit_env(host_iva);
+       if (status)
+               printk(KERN_DEBUG"kvm: Failed to disable VT support! :%ld\n",
+                               status);
+       ia64_ptr_entry(0x3, slot);
+}
+
+void kvm_arch_check_processor_compat(void *rtn)
+{
+       *(int *)rtn = 0;
+}
+
+int kvm_dev_ioctl_check_extension(long ext)
+{
+
+       int r;
+
+       switch (ext) {
+       case KVM_CAP_IRQCHIP:
+       case KVM_CAP_USER_MEMORY:
+
+               r = 1;
+               break;
+       default:
+               r = 0;
+       }
+       return r;
+
+}
+
+static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
+                                       gpa_t addr)
+{
+       struct kvm_io_device *dev;
+
+       dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
+
+       return dev;
+}
+
+static int handle_vm_error(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+       kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
+       kvm_run->hw.hardware_exit_reason = 1;
+       return 0;
+}
+
+static int handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+       struct kvm_mmio_req *p;
+       struct kvm_io_device *mmio_dev;
+
+       p = kvm_get_vcpu_ioreq(vcpu);
+
+       if ((p->addr & PAGE_MASK) == IOAPIC_DEFAULT_BASE_ADDRESS)
+               goto mmio;
+       vcpu->mmio_needed = 1;
+       vcpu->mmio_phys_addr = kvm_run->mmio.phys_addr = p->addr;
+       vcpu->mmio_size = kvm_run->mmio.len = p->size;
+       vcpu->mmio_is_write = kvm_run->mmio.is_write = !p->dir;
+
+       if (vcpu->mmio_is_write)
+               memcpy(vcpu->mmio_data, &p->data, p->size);
+       memcpy(kvm_run->mmio.data, &p->data, p->size);
+       kvm_run->exit_reason = KVM_EXIT_MMIO;
+       return 0;
+mmio:
+       mmio_dev = vcpu_find_mmio_dev(vcpu, p->addr);
+       if (mmio_dev) {
+               if (!p->dir)
+                       kvm_iodevice_write(mmio_dev, p->addr, p->size,
+                                               &p->data);
+               else
+                       kvm_iodevice_read(mmio_dev, p->addr, p->size,
+                                               &p->data);
+
+       } else
+               printk(KERN_ERR"kvm: No iodevice found! addr:%lx\n", p->addr);
+       p->state = STATE_IORESP_READY;
+
+       return 1;
+}
+
+static int handle_pal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+       struct exit_ctl_data *p;
+
+       p = kvm_get_exit_data(vcpu);
+
+       if (p->exit_reason == EXIT_REASON_PAL_CALL)
+               return kvm_pal_emul(vcpu, kvm_run);
+       else {
+               kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
+               kvm_run->hw.hardware_exit_reason = 2;
+               return 0;
+       }
+}
+
+static int handle_sal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+       struct exit_ctl_data *p;
+
+       p = kvm_get_exit_data(vcpu);
+
+       if (p->exit_reason == EXIT_REASON_SAL_CALL) {
+               kvm_sal_emul(vcpu);
+               return 1;
+       } else {
+               kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
+               kvm_run->hw.hardware_exit_reason = 3;
+               return 0;
+       }
+
+}
+
+/*
+ *  offset: address offset to IPI space.
+ *  value:  deliver value.
+ */
+static void vcpu_deliver_ipi(struct kvm_vcpu *vcpu, uint64_t dm,
+                               uint64_t vector)
+{
+       switch (dm) {
+       case SAPIC_FIXED:
+               kvm_apic_set_irq(vcpu, vector, 0);
+               break;
+       case SAPIC_NMI:
+               kvm_apic_set_irq(vcpu, 2, 0);
+               break;
+       case SAPIC_EXTINT:
+               kvm_apic_set_irq(vcpu, 0, 0);
+               break;
+       case SAPIC_INIT:
+       case SAPIC_PMI:
+       default:
+               printk(KERN_ERR"kvm: Unimplemented Deliver reserved IPI!\n");
+               break;
+       }
+}
+
+static struct kvm_vcpu *lid_to_vcpu(struct kvm *kvm, unsigned long id,
+                       unsigned long eid)
+{
+       union ia64_lid lid;
+       int i;
+
+       for (i = 0; i < KVM_MAX_VCPUS; i++) {
+               if (kvm->vcpus[i]) {
+                       lid.val = VCPU_LID(kvm->vcpus[i]);
+                       if (lid.id == id && lid.eid == eid)
+                               return kvm->vcpus[i];
+               }
+       }
+
+       return NULL;
+}
+
+static int handle_ipi(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+       struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
+       struct kvm_vcpu *target_vcpu;
+       struct kvm_pt_regs *regs;
+       union ia64_ipi_a addr = p->u.ipi_data.addr;
+       union ia64_ipi_d data = p->u.ipi_data.data;
+
+       target_vcpu = lid_to_vcpu(vcpu->kvm, addr.id, addr.eid);
+       if (!target_vcpu)
+               return handle_vm_error(vcpu, kvm_run);
+
+       if (!target_vcpu->arch.launched) {
+               regs = vcpu_regs(target_vcpu);
+
+               regs->cr_iip = vcpu->kvm->arch.rdv_sal_data.boot_ip;
+               regs->r1 = vcpu->kvm->arch.rdv_sal_data.boot_gp;
+
+               target_vcpu->arch.mp_state = VCPU_MP_STATE_RUNNABLE;
+               if (waitqueue_active(&target_vcpu->wq))
+                       wake_up_interruptible(&target_vcpu->wq);
+       } else {
+               vcpu_deliver_ipi(target_vcpu, data.dm, data.vector);
+               if (target_vcpu != vcpu)
+                       kvm_vcpu_kick(target_vcpu);
+       }
+
+       return 1;
+}
+
+struct call_data {
+       struct kvm_ptc_g ptc_g_data;
+       struct kvm_vcpu *vcpu;
+};
+
+static void vcpu_global_purge(void *info)
+{
+       struct call_data *p = (struct call_data *)info;
+       struct kvm_vcpu *vcpu = p->vcpu;
+
+       if (test_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
+               return;
+
+       set_bit(KVM_REQ_PTC_G, &vcpu->requests);
+       if (vcpu->arch.ptc_g_count < MAX_PTC_G_NUM) {
+               vcpu->arch.ptc_g_data[vcpu->arch.ptc_g_count++] =
+                                                       p->ptc_g_data;
+       } else {
+               clear_bit(KVM_REQ_PTC_G, &vcpu->requests);
+               vcpu->arch.ptc_g_count = 0;
+               set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests);
+       }
+}
+
+static int handle_global_purge(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+       struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
+       struct kvm *kvm = vcpu->kvm;
+       struct call_data call_data;
+       int i;
+       call_data.ptc_g_data = p->u.ptc_g_data;
+
+       for (i = 0; i < KVM_MAX_VCPUS; i++) {
+               if (!kvm->vcpus[i] || kvm->vcpus[i]->arch.mp_state ==
+                                               VCPU_MP_STATE_UNINITIALIZED ||
+                                       vcpu == kvm->vcpus[i])
+                       continue;
+
+               if (waitqueue_active(&kvm->vcpus[i]->wq))
+                       wake_up_interruptible(&kvm->vcpus[i]->wq);
+
+               if (kvm->vcpus[i]->cpu != -1) {
+                       call_data.vcpu = kvm->vcpus[i];
+                       smp_call_function_single(kvm->vcpus[i]->cpu,
+                                       vcpu_global_purge, &call_data, 0, 1);
+               } else
+                       printk(KERN_WARNING"kvm: Uninit vcpu received ipi!\n");
+
+       }
+       return 1;
+}
+
+static int handle_switch_rr6(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+       return 1;
+}
+
+int kvm_emulate_halt(struct kvm_vcpu *vcpu)
+{
+
+       ktime_t kt;
+       long itc_diff;
+       unsigned long vcpu_now_itc;
+
+       unsigned long expires;
+       struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
+       unsigned long cyc_per_usec = local_cpu_data->cyc_per_usec;
+       struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
+
+       vcpu_now_itc = ia64_getreg(_IA64_REG_AR_ITC) + vcpu->arch.itc_offset;
+
+       if (time_after(vcpu_now_itc, vpd->itm)) {
+               vcpu->arch.timer_check = 1;
+               return 1;
+       }
+       itc_diff = vpd->itm - vcpu_now_itc;
+       if (itc_diff < 0)
+               itc_diff = -itc_diff;
+
+       expires = div64_64(itc_diff, cyc_per_usec);
+       kt = ktime_set(0, 1000 * expires);
+       vcpu->arch.ht_active = 1;
+       hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
+
+       if (irqchip_in_kernel(vcpu->kvm)) {
+               vcpu->arch.mp_state = VCPU_MP_STATE_HALTED;
+               kvm_vcpu_block(vcpu);
+               hrtimer_cancel(p_ht);
+               vcpu->arch.ht_active = 0;
+
+               if (vcpu->arch.mp_state != VCPU_MP_STATE_RUNNABLE)
+                       return -EINTR;
+               return 1;
+       } else {
+               printk(KERN_ERR"kvm: Unsupported userspace halt!");
+               return 0;
+       }
+}
+
+static int handle_vm_shutdown(struct kvm_vcpu *vcpu,
+               struct kvm_run *kvm_run)
+{
+       kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
+       return 0;
+}
+
+static int handle_external_interrupt(struct kvm_vcpu *vcpu,
+               struct kvm_run *kvm_run)
+{
+       return 1;
+}
+
+static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu,
+               struct kvm_run *kvm_run) = {
+       [EXIT_REASON_VM_PANIC]              = handle_vm_error,
+       [EXIT_REASON_MMIO_INSTRUCTION]      = handle_mmio,
+       [EXIT_REASON_PAL_CALL]              = handle_pal_call,
+       [EXIT_REASON_SAL_CALL]              = handle_sal_call,
+       [EXIT_REASON_SWITCH_RR6]            = handle_switch_rr6,
+       [EXIT_REASON_VM_DESTROY]            = handle_vm_shutdown,
+       [EXIT_REASON_EXTERNAL_INTERRUPT]    = handle_external_interrupt,
+       [EXIT_REASON_IPI]                   = handle_ipi,
+       [EXIT_REASON_PTC_G]                 = handle_global_purge,
+
+};
+
+static const int kvm_vti_max_exit_handlers =
+               sizeof(kvm_vti_exit_handlers)/sizeof(*kvm_vti_exit_handlers);
+
+static void kvm_prepare_guest_switch(struct kvm_vcpu *vcpu)
+{
+}
+
+static uint32_t kvm_get_exit_reason(struct kvm_vcpu *vcpu)
+{
+       struct exit_ctl_data *p_exit_data;
+
+       p_exit_data = kvm_get_exit_data(vcpu);
+       return p_exit_data->exit_reason;
+}
+
+/*
+ * The guest has exited.  See if we can fix it or if we need userspace
+ * assistance.
+ */
+static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
+{
+       u32 exit_reason = kvm_get_exit_reason(vcpu);
+       vcpu->arch.last_exit = exit_reason;
+
+       if (exit_reason < kvm_vti_max_exit_handlers
+                       && kvm_vti_exit_handlers[exit_reason])
+               return kvm_vti_exit_handlers[exit_reason](vcpu, kvm_run);
+       else {
+               kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
+               kvm_run->hw.hardware_exit_reason = exit_reason;
+       }
+       return 0;
+}
+
+static inline void vti_set_rr6(unsigned long rr6)
+{
+       ia64_set_rr(RR6, rr6);
+       ia64_srlz_i();
+}
+
+static int kvm_insert_vmm_mapping(struct kvm_vcpu *vcpu)
+{
+       unsigned long pte;
+       struct kvm *kvm = vcpu->kvm;
+       int r;
+
+       /*Insert a pair of tr to map vmm*/
+       pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
+       r = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
+       if (r < 0)
+               goto out;
+       vcpu->arch.vmm_tr_slot = r;
+       /*Insert a pairt of tr to map data of vm*/
+       pte = pte_val(mk_pte_phys(__pa(kvm->arch.vm_base), PAGE_KERNEL));
+       r = ia64_itr_entry(0x3, KVM_VM_DATA_BASE,
+                                       pte, KVM_VM_DATA_SHIFT);
+       if (r < 0)
+               goto out;
+       vcpu->arch.vm_tr_slot = r;
+       r = 0;
+out:
+       return r;
+
+}
+
+static void kvm_purge_vmm_mapping(struct kvm_vcpu *vcpu)
+{
+
+       ia64_ptr_entry(0x3, vcpu->arch.vmm_tr_slot);
+       ia64_ptr_entry(0x3, vcpu->arch.vm_tr_slot);
+
+}
+
+static int kvm_vcpu_pre_transition(struct kvm_vcpu *vcpu)
+{
+       int cpu = smp_processor_id();
+
+       if (vcpu->arch.last_run_cpu != cpu ||
+                       per_cpu(last_vcpu, cpu) != vcpu) {
+               per_cpu(last_vcpu, cpu) = vcpu;
+               vcpu->arch.last_run_cpu = cpu;
+               kvm_flush_tlb_all();
+       }
+
+       vcpu->arch.host_rr6 = ia64_get_rr(RR6);
+       vti_set_rr6(vcpu->arch.vmm_rr);
+       return kvm_insert_vmm_mapping(vcpu);
+}
+static void kvm_vcpu_post_transition(struct kvm_vcpu *vcpu)
+{
+       kvm_purge_vmm_mapping(vcpu);
+       vti_set_rr6(vcpu->arch.host_rr6);
+}
+
+static int  vti_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+       union context *host_ctx, *guest_ctx;
+       int r;
+
+       /*Get host and guest context with guest address space.*/
+       host_ctx = kvm_get_host_context(vcpu);
+       guest_ctx = kvm_get_guest_context(vcpu);
+
+       r = kvm_vcpu_pre_transition(vcpu);
+       if (r < 0)
+               goto out;
+       kvm_vmm_info->tramp_entry(host_ctx, guest_ctx);
+       kvm_vcpu_post_transition(vcpu);
+       r = 0;
+out:
+       return r;
+}
+
+static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+       int r;
+
+again:
+       preempt_disable();
+
+       kvm_prepare_guest_switch(vcpu);
+       local_irq_disable();
+
+       if (signal_pending(current)) {
+               local_irq_enable();
+               preempt_enable();
+               r = -EINTR;
+               kvm_run->exit_reason = KVM_EXIT_INTR;
+               goto out;
+       }
+
+       vcpu->guest_mode = 1;
+       kvm_guest_enter();
+
+       r = vti_vcpu_run(vcpu, kvm_run);
+       if (r < 0) {
+               local_irq_enable();
+               preempt_enable();
+               kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
+               goto out;
+       }
+
+       vcpu->arch.launched = 1;
+       vcpu->guest_mode = 0;
+       local_irq_enable();
+
+       /*
+        * We must have an instruction between local_irq_enable() and
+        * kvm_guest_exit(), so the timer interrupt isn't delayed by
+        * the interrupt shadow.  The stat.exits increment will do nicely.
+        * But we need to prevent reordering, hence this barrier():
+        */
+       barrier();
+
+       kvm_guest_exit();
+
+       preempt_enable();
+
+       r = kvm_handle_exit(kvm_run, vcpu);
+
+       if (r > 0) {
+               if (!need_resched())
+                       goto again;
+       }
+
+out:
+       if (r > 0) {
+               kvm_resched(vcpu);
+               goto again;
+       }
+
+       return r;
+}
+
+static void kvm_set_mmio_data(struct kvm_vcpu *vcpu)
+{
+       struct kvm_mmio_req *p = kvm_get_vcpu_ioreq(vcpu);
+
+       if (!vcpu->mmio_is_write)
+               memcpy(&p->data, vcpu->mmio_data, 8);
+       p->state = STATE_IORESP_READY;
+}
+
+int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+       int r;
+       sigset_t sigsaved;
+
+       vcpu_load(vcpu);
+
+       if (unlikely(vcpu->arch.mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
+               kvm_vcpu_block(vcpu);
+               vcpu_put(vcpu);
+               return -EAGAIN;
+       }
+
+       if (vcpu->sigset_active)
+               sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
+
+       if (vcpu->mmio_needed) {
+               memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
+               kvm_set_mmio_data(vcpu);
+               vcpu->mmio_read_completed = 1;
+               vcpu->mmio_needed = 0;
+       }
+       r = __vcpu_run(vcpu, kvm_run);
+
+       if (vcpu->sigset_active)
+               sigprocmask(SIG_SETMASK, &sigsaved, NULL);
+
+       vcpu_put(vcpu);
+       return r;
+}
+
+/*
+ * Allocate 16M memory for every vm to hold its specific data.
+ * Its memory map is defined in kvm_host.h.
+ */
+static struct kvm *kvm_alloc_kvm(void)
+{
+
+       struct kvm *kvm;
+       uint64_t  vm_base;
+
+       vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
+
+       if (!vm_base)
+               return ERR_PTR(-ENOMEM);
+       printk(KERN_DEBUG"kvm: VM data's base Address:0x%lx\n", vm_base);
+
+       /* Zero all pages before use! */
+       memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
+
+       kvm = (struct kvm *)(vm_base + KVM_VM_OFS);
+       kvm->arch.vm_base = vm_base;
+
+       return kvm;
+}
+
+struct kvm_io_range {
+       unsigned long start;
+       unsigned long size;
+       unsigned long type;
+};
+
+static const struct kvm_io_range io_ranges[] = {
+       {VGA_IO_START, VGA_IO_SIZE, GPFN_FRAME_BUFFER},
+       {MMIO_START, MMIO_SIZE, GPFN_LOW_MMIO},
+       {LEGACY_IO_START, LEGACY_IO_SIZE, GPFN_LEGACY_IO},
+       {IO_SAPIC_START, IO_SAPIC_SIZE, GPFN_IOSAPIC},
+       {PIB_START, PIB_SIZE, GPFN_PIB},
+};
+
+static void kvm_build_io_pmt(struct kvm *kvm)
+{
+       unsigned long i, j;
+
+       /* Mark I/O ranges */
+       for (i = 0; i < (sizeof(io_ranges) / sizeof(struct kvm_io_range));
+                                                       i++) {
+               for (j = io_ranges[i].start;
+                               j < io_ranges[i].start + io_ranges[i].size;
+                               j += PAGE_SIZE)
+                       kvm_set_pmt_entry(kvm, j >> PAGE_SHIFT,
+                                       io_ranges[i].type, 0);
+       }
+
+}
+
+/*Use unused rids to virtualize guest rid.*/
+#define GUEST_PHYSICAL_RR0     0x1739
+#define GUEST_PHYSICAL_RR4     0x2739
+#define VMM_INIT_RR            0x1660
+
+static void kvm_init_vm(struct kvm *kvm)
+{
+       long vm_base;
+
+       BUG_ON(!kvm);
+
+       kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
+       kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
+       kvm->arch.vmm_init_rr = VMM_INIT_RR;
+
+       vm_base = kvm->arch.vm_base;
+       if (vm_base) {
+               kvm->arch.vhpt_base = vm_base + KVM_VHPT_OFS;
+               kvm->arch.vtlb_base = vm_base + KVM_VTLB_OFS;
+               kvm->arch.vpd_base  = vm_base + KVM_VPD_OFS;
+       }
+
+       /*
+        *Fill P2M entries for MMIO/IO ranges
+        */
+       kvm_build_io_pmt(kvm);
+
+}
+
+struct  kvm *kvm_arch_create_vm(void)
+{
+       struct kvm *kvm = kvm_alloc_kvm();
+
+       if (IS_ERR(kvm))
+               return ERR_PTR(-ENOMEM);
+       kvm_init_vm(kvm);
+
+       return kvm;
+
+}
+
+static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm,
+                                       struct kvm_irqchip *chip)
+{
+       int r;
+
+       r = 0;
+       switch (chip->chip_id) {
+       case KVM_IRQCHIP_IOAPIC:
+               memcpy(&chip->chip.ioapic, ioapic_irqchip(kvm),
+                               sizeof(struct kvm_ioapic_state));
+               break;
+       default:
+               r = -EINVAL;
+               break;
+       }
+       return r;
+}
+
+static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
+{
+       int r;
+
+       r = 0;
+       switch (chip->chip_id) {
+       case KVM_IRQCHIP_IOAPIC:
+               memcpy(ioapic_irqchip(kvm),
+                               &chip->chip.ioapic,
+                               sizeof(struct kvm_ioapic_state));
+               break;
+       default:
+               r = -EINVAL;
+               break;
+       }
+       return r;
+}
+
+#define RESTORE_REGS(_x) vcpu->arch._x = regs->_x
+
+int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
+{
+       int i;
+       struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
+       int r;
+
+       vcpu_load(vcpu);
+
+       for (i = 0; i < 16; i++) {
+               vpd->vgr[i] = regs->vpd.vgr[i];
+               vpd->vbgr[i] = regs->vpd.vbgr[i];
+       }
+       for (i = 0; i < 128; i++)
+               vpd->vcr[i] = regs->vpd.vcr[i];
+       vpd->vhpi = regs->vpd.vhpi;
+       vpd->vnat = regs->vpd.vnat;
+       vpd->vbnat = regs->vpd.vbnat;
+       vpd->vpsr = regs->vpd.vpsr;
+
+       vpd->vpr = regs->vpd.vpr;
+
+       r = -EFAULT;
+       r = copy_from_user(&vcpu->arch.guest, regs->saved_guest,
+                                               sizeof(union context));
+       if (r)
+               goto out;
+       r = copy_from_user(vcpu + 1, regs->saved_stack +
+                       sizeof(struct kvm_vcpu),
+                       IA64_STK_OFFSET - sizeof(struct kvm_vcpu));
+       if (r)
+               goto out;
+       vcpu->arch.exit_data =
+               ((struct kvm_vcpu *)(regs->saved_stack))->arch.exit_data;
+
+       RESTORE_REGS(mp_state);
+       RESTORE_REGS(vmm_rr);
+       memcpy(vcpu->arch.itrs, regs->itrs, sizeof(struct thash_data) * NITRS);
+       memcpy(vcpu->arch.dtrs, regs->dtrs, sizeof(struct thash_data) * NDTRS);
+       RESTORE_REGS(itr_regions);
+       RESTORE_REGS(dtr_regions);
+       RESTORE_REGS(tc_regions);
+       RESTORE_REGS(irq_check);
+       RESTORE_REGS(itc_check);
+       RESTORE_REGS(timer_check);
+       RESTORE_REGS(timer_pending);
+       RESTORE_REGS(last_itc);
+       for (i = 0; i < 8; i++) {
+               vcpu->arch.vrr[i] = regs->vrr[i];
+               vcpu->arch.ibr[i] = regs->ibr[i];
+               vcpu->arch.dbr[i] = regs->dbr[i];
+       }
+       for (i = 0; i < 4; i++)
+               vcpu->arch.insvc[i] = regs->insvc[i];
+       RESTORE_REGS(xtp);
+       RESTORE_REGS(metaphysical_rr0);
+       RESTORE_REGS(metaphysical_rr4);
+       RESTORE_REGS(metaphysical_saved_rr0);
+       RESTORE_REGS(metaphysical_saved_rr4);
+       RESTORE_REGS(fp_psr);
+       RESTORE_REGS(saved_gp);
+
+       vcpu->arch.irq_new_pending = 1;
+       vcpu->arch.itc_offset = regs->saved_itc - ia64_getreg(_IA64_REG_AR_ITC);
+       set_bit(KVM_REQ_RESUME, &vcpu->requests);
+
+       vcpu_put(vcpu);
+       r = 0;
+out:
+       return r;
+}
+
+long kvm_arch_vm_ioctl(struct file *filp,
+               unsigned int ioctl, unsigned long arg)
+{
+       struct kvm *kvm = filp->private_data;
+       void __user *argp = (void __user *)arg;
+       int r = -EINVAL;
+
+       switch (ioctl) {
+       case KVM_SET_MEMORY_REGION: {
+               struct kvm_memory_region kvm_mem;
+               struct kvm_userspace_memory_region kvm_userspace_mem;
+
+               r = -EFAULT;
+               if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
+                       goto out;
+               kvm_userspace_mem.slot = kvm_mem.slot;
+               kvm_userspace_mem.flags = kvm_mem.flags;
+               kvm_userspace_mem.guest_phys_addr =
+                                       kvm_mem.guest_phys_addr;
+               kvm_userspace_mem.memory_size = kvm_mem.memory_size;
+               r = kvm_vm_ioctl_set_memory_region(kvm,
+                                       &kvm_userspace_mem, 0);
+               if (r)
+                       goto out;
+               break;
+               }
+       case KVM_CREATE_IRQCHIP:
+               r = -EFAULT;
+               r = kvm_ioapic_init(kvm);
+               if (r)
+                       goto out;
+               break;
+       case KVM_IRQ_LINE: {
+               struct kvm_irq_level irq_event;
+
+               r = -EFAULT;
+               if (copy_from_user(&irq_event, argp, sizeof irq_event))
+                       goto out;
+               if (irqchip_in_kernel(kvm)) {
+                       mutex_lock(&kvm->lock);
+                       kvm_ioapic_set_irq(kvm->arch.vioapic,
+                                               irq_event.irq,
+                                               irq_event.level);
+                       mutex_unlock(&kvm->lock);
+                       r = 0;
+               }
+               break;
+               }
+       case KVM_GET_IRQCHIP: {
+               /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
+               struct kvm_irqchip chip;
+
+               r = -EFAULT;
+               if (copy_from_user(&chip, argp, sizeof chip))
+                               goto out;
+               r = -ENXIO;
+               if (!irqchip_in_kernel(kvm))
+                       goto out;
+               r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
+               if (r)
+                       goto out;
+               r = -EFAULT;
+               if (copy_to_user(argp, &chip, sizeof chip))
+                               goto out;
+               r = 0;
+               break;
+               }
+       case KVM_SET_IRQCHIP: {
+               /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
+               struct kvm_irqchip chip;
+
+               r = -EFAULT;
+               if (copy_from_user(&chip, argp, sizeof chip))
+                               goto out;
+               r = -ENXIO;
+               if (!irqchip_in_kernel(kvm))
+                       goto out;
+               r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
+               if (r)
+                       goto out;
+               r = 0;
+               break;
+               }
+       default:
+               ;
+       }
+out:
+       return r;
+}
+
+int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
+               struct kvm_sregs *sregs)
+{
+       return -EINVAL;
+}
+
+int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
+               struct kvm_sregs *sregs)
+{
+       return -EINVAL;
+
+}
+int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
+               struct kvm_translation *tr)
+{
+
+       return -EINVAL;
+}
+
+static int kvm_alloc_vmm_area(void)
+{
+       if (!kvm_vmm_base && (kvm_vm_buffer_size < KVM_VM_BUFFER_SIZE)) {
+               kvm_vmm_base = __get_free_pages(GFP_KERNEL,
+                               get_order(KVM_VMM_SIZE));
+               if (!kvm_vmm_base)
+                       return -ENOMEM;
+
+               memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
+               kvm_vm_buffer = kvm_vmm_base + VMM_SIZE;
+
+               printk(KERN_DEBUG"kvm:VMM's Base Addr:0x%lx, vm_buffer:0x%lx\n",
+                               kvm_vmm_base, kvm_vm_buffer);
+       }
+
+       return 0;
+}
+
+static void kvm_free_vmm_area(void)
+{
+       if (kvm_vmm_base) {
+               /*Zero this area before free to avoid bits leak!!*/
+               memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
+               free_pages(kvm_vmm_base, get_order(KVM_VMM_SIZE));
+               kvm_vmm_base  = 0;
+               kvm_vm_buffer = 0;
+               kvm_vsa_base = 0;
+       }
+}
+
+/*
+ * Make sure that a cpu that is being hot-unplugged does not have any vcpus
+ * cached on it. Leave it as blank for IA64.
+ */
+void decache_vcpus_on_cpu(int cpu)
+{
+}
+
+static void vti_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
+{
+}
+
+static int vti_init_vpd(struct kvm_vcpu *vcpu)
+{
+       int i;
+       union cpuid3_t cpuid3;
+       struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
+
+       if (IS_ERR(vpd))
+               return PTR_ERR(vpd);
+
+       /* CPUID init */
+       for (i = 0; i < 5; i++)
+               vpd->vcpuid[i] = ia64_get_cpuid(i);
+
+       /* Limit the CPUID number to 5 */
+       cpuid3.value = vpd->vcpuid[3];
+       cpuid3.number = 4;      /* 5 - 1 */
+       vpd->vcpuid[3] = cpuid3.value;
+
+       /*Set vac and vdc fields*/
+       vpd->vac.a_from_int_cr = 1;
+       vpd->vac.a_to_int_cr = 1;
+       vpd->vac.a_from_psr = 1;
+       vpd->vac.a_from_cpuid = 1;
+       vpd->vac.a_cover = 1;
+       vpd->vac.a_bsw = 1;
+       vpd->vac.a_int = 1;
+       vpd->vdc.d_vmsw = 1;
+
+       /*Set virtual buffer*/
+       vpd->virt_env_vaddr = KVM_VM_BUFFER_BASE;
+
+       return 0;
+}
+
+static int vti_create_vp(struct kvm_vcpu *vcpu)
+{
+       long ret;
+       struct vpd *vpd = vcpu->arch.vpd;
+       unsigned long  vmm_ivt;
+
+       vmm_ivt = kvm_vmm_info->vmm_ivt;
+
+       printk(KERN_DEBUG "kvm: vcpu:%p,ivt: 0x%lx\n", vcpu, vmm_ivt);
+
+       ret = ia64_pal_vp_create((u64 *)vpd, (u64 *)vmm_ivt, 0);
+
+       if (ret) {
+               printk(KERN_ERR"kvm: ia64_pal_vp_create failed!\n");
+               return -EINVAL;
+       }
+       return 0;
+}
+
+static void init_ptce_info(struct kvm_vcpu *vcpu)
+{
+       ia64_ptce_info_t ptce = {0};
+
+       ia64_get_ptce(&ptce);
+       vcpu->arch.ptce_base = ptce.base;
+       vcpu->arch.ptce_count[0] = ptce.count[0];
+       vcpu->arch.ptce_count[1] = ptce.count[1];
+       vcpu->arch.ptce_stride[0] = ptce.stride[0];
+       vcpu->arch.ptce_stride[1] = ptce.stride[1];
+}
+
+static void kvm_migrate_hlt_timer(struct kvm_vcpu *vcpu)
+{
+       struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
+
+       if (hrtimer_cancel(p_ht))
+               hrtimer_start(p_ht, p_ht->expires, HRTIMER_MODE_ABS);
+}
+
+static enum hrtimer_restart hlt_timer_fn(struct hrtimer *data)
+{
+       struct kvm_vcpu *vcpu;
+       wait_queue_head_t *q;
+
+       vcpu  = container_of(data, struct kvm_vcpu, arch.hlt_timer);
+       if (vcpu->arch.mp_state != VCPU_MP_STATE_HALTED)
+               goto out;
+
+       q = &vcpu->wq;
+       if (waitqueue_active(q)) {
+               vcpu->arch.mp_state = VCPU_MP_STATE_RUNNABLE;
+               wake_up_interruptible(q);
+       }
+out:
+       vcpu->arch.timer_check = 1;
+       return HRTIMER_NORESTART;
+}
+
+#define PALE_RESET_ENTRY    0x80000000ffffffb0UL
+
+int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
+{
+       struct kvm_vcpu *v;
+       int r;
+       int i;
+       long itc_offset;
+       struct kvm *kvm = vcpu->kvm;
+       struct kvm_pt_regs *regs = vcpu_regs(vcpu);
+
+       union context *p_ctx = &vcpu->arch.guest;
+       struct kvm_vcpu *vmm_vcpu = to_guest(vcpu->kvm, vcpu);
+
+       /*Init vcpu context for first run.*/
+       if (IS_ERR(vmm_vcpu))
+               return PTR_ERR(vmm_vcpu);
+
+       if (vcpu->vcpu_id == 0) {
+               vcpu->arch.mp_state = VCPU_MP_STATE_RUNNABLE;
+
+               /*Set entry address for first run.*/
+               regs->cr_iip = PALE_RESET_ENTRY;
+
+               /*Initilize itc offset for vcpus*/
+               itc_offset = 0UL - ia64_getreg(_IA64_REG_AR_ITC);
+               for (i = 0; i < MAX_VCPU_NUM; i++) {
+                       v = (struct kvm_vcpu *)((char *)vcpu + VCPU_SIZE * i);
+                       v->arch.itc_offset = itc_offset;
+                       v->arch.last_itc = 0;
+               }
+       } else
+               vcpu->arch.mp_state = VCPU_MP_STATE_UNINITIALIZED;
+
+       r = -ENOMEM;
+       vcpu->arch.apic = kzalloc(sizeof(struct kvm_lapic), GFP_KERNEL);
+       if (!vcpu->arch.apic)
+               goto out;
+       vcpu->arch.apic->vcpu = vcpu;
+
+       p_ctx->gr[1] = 0;
+       p_ctx->gr[12] = (unsigned long)((char *)vmm_vcpu + IA64_STK_OFFSET);
+       p_ctx->gr[13] = (unsigned long)vmm_vcpu;
+       p_ctx->psr = 0x1008522000UL;
+       p_ctx->ar[40] = FPSR_DEFAULT; /*fpsr*/
+       p_ctx->caller_unat = 0;
+       p_ctx->pr = 0x0;
+       p_ctx->ar[36] = 0x0; /*unat*/
+       p_ctx->ar[19] = 0x0; /*rnat*/
+       p_ctx->ar[18] = (unsigned long)vmm_vcpu +
+                               ((sizeof(struct kvm_vcpu)+15) & ~15);
+       p_ctx->ar[64] = 0x0; /*pfs*/
+       p_ctx->cr[0] = 0x7e04UL;
+       p_ctx->cr[2] = (unsigned long)kvm_vmm_info->vmm_ivt;
+       p_ctx->cr[8] = 0x3c;
+
+       /*Initilize region register*/
+       p_ctx->rr[0] = 0x30;
+       p_ctx->rr[1] = 0x30;
+       p_ctx->rr[2] = 0x30;
+       p_ctx->rr[3] = 0x30;
+       p_ctx->rr[4] = 0x30;
+       p_ctx->rr[5] = 0x30;
+       p_ctx->rr[7] = 0x30;
+
+       /*Initilize branch register 0*/
+       p_ctx->br[0] = *(unsigned long *)kvm_vmm_info->vmm_entry;
+
+       vcpu->arch.vmm_rr = kvm->arch.vmm_init_rr;
+       vcpu->arch.metaphysical_rr0 = kvm->arch.metaphysical_rr0;
+       vcpu->arch.metaphysical_rr4 = kvm->arch.metaphysical_rr4;
+
+       hrtimer_init(&vcpu->arch.hlt_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+       vcpu->arch.hlt_timer.function = hlt_timer_fn;
+
+       vcpu->arch.last_run_cpu = -1;
+       vcpu->arch.vpd = (struct vpd *)VPD_ADDR(vcpu->vcpu_id);
+       vcpu->arch.vsa_base = kvm_vsa_base;
+       vcpu->arch.__gp = kvm_vmm_gp;
+       vcpu->arch.dirty_log_lock_pa = __pa(&kvm->arch.dirty_log_lock);
+       vcpu->arch.vhpt.hash = (struct thash_data *)VHPT_ADDR(vcpu->vcpu_id);
+       vcpu->arch.vtlb.hash = (struct thash_data *)VTLB_ADDR(vcpu->vcpu_id);
+       init_ptce_info(vcpu);
+
+       r = 0;
+out:
+       return r;
+}
+
+static int vti_vcpu_setup(struct kvm_vcpu *vcpu, int id)
+{
+       unsigned long psr;
+       int r;
+
+       local_irq_save(psr);
+       r = kvm_insert_vmm_mapping(vcpu);
+       if (r)
+               goto fail;
+       r = kvm_vcpu_init(vcpu, vcpu->kvm, id);
+       if (r)
+               goto fail;
+
+       r = vti_init_vpd(vcpu);
+       if (r) {
+               printk(KERN_DEBUG"kvm: vpd init error!!\n");
+               goto uninit;
+       }
+
+       r = vti_create_vp(vcpu);
+       if (r)
+               goto uninit;
+
+       kvm_purge_vmm_mapping(vcpu);
+       local_irq_restore(psr);
+
+       return 0;
+uninit:
+       kvm_vcpu_uninit(vcpu);
+fail:
+       return r;
+}
+
+struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
+               unsigned int id)
+{
+       struct kvm_vcpu *vcpu;
+       unsigned long vm_base = kvm->arch.vm_base;
+       int r;
+       int cpu;
+
+       r = -ENOMEM;
+       if (!vm_base) {
+               printk(KERN_ERR"kvm: Create vcpu[%d] error!\n", id);
+               goto fail;
+       }
+       vcpu = (struct kvm_vcpu *)(vm_base + KVM_VCPU_OFS + VCPU_SIZE * id);
+       vcpu->kvm = kvm;
+
+       cpu = get_cpu();
+       vti_vcpu_load(vcpu, cpu);
+       r = vti_vcpu_setup(vcpu, id);
+       put_cpu();
+
+       if (r) {
+               printk(KERN_DEBUG"kvm: vcpu_setup error!!\n");
+               goto fail;
+       }
+
+       return vcpu;
+fail:
+       return ERR_PTR(r);
+}
+
+int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
+{
+       return 0;
+}
+
+int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
+{
+       return -EINVAL;
+}
+
+int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
+{
+       return -EINVAL;
+}
+
+int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
+               struct kvm_debug_guest *dbg)
+{
+       return -EINVAL;
+}
+
+static void free_kvm(struct kvm *kvm)
+{
+       unsigned long vm_base = kvm->arch.vm_base;
+
+       if (vm_base) {
+               memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
+               free_pages(vm_base, get_order(KVM_VM_DATA_SIZE));
+       }
+
+}
+
+static void kvm_release_vm_pages(struct kvm *kvm)
+{
+       struct kvm_memory_slot *memslot;
+       int i, j;
+       unsigned long base_gfn;
+
+       for (i = 0; i < kvm->nmemslots; i++) {
+               memslot = &kvm->memslots[i];
+               base_gfn = memslot->base_gfn;
+
+               for (j = 0; j < memslot->npages; j++) {
+                       if (memslot->rmap[j])
+                               put_page((struct page *)memslot->rmap[j]);
+               }
+       }
+}
+
+void kvm_arch_destroy_vm(struct kvm *kvm)
+{
+       kfree(kvm->arch.vioapic);
+       kvm_release_vm_pages(kvm);
+       kvm_free_physmem(kvm);
+       free_kvm(kvm);
+}
+
+void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
+{
+}
+
+void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
+{
+       if (cpu != vcpu->cpu) {
+               vcpu->cpu = cpu;
+               if (vcpu->arch.ht_active)
+                       kvm_migrate_hlt_timer(vcpu);
+       }
+}
+
+#define SAVE_REGS(_x)  regs->_x = vcpu->arch._x
+
+int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
+{
+       int i;
+       int r;
+       struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
+       vcpu_load(vcpu);
+
+       for (i = 0; i < 16; i++) {
+               regs->vpd.vgr[i] = vpd->vgr[i];
+               regs->vpd.vbgr[i] = vpd->vbgr[i];
+       }
+       for (i = 0; i < 128; i++)
+               regs->vpd.vcr[i] = vpd->vcr[i];
+       regs->vpd.vhpi = vpd->vhpi;
+       regs->vpd.vnat = vpd->vnat;
+       regs->vpd.vbnat = vpd->vbnat;
+       regs->vpd.vpsr = vpd->vpsr;
+       regs->vpd.vpr = vpd->vpr;
+
+       r = -EFAULT;
+       r = copy_to_user(regs->saved_guest, &vcpu->arch.guest,
+                                       sizeof(union context));
+       if (r)
+               goto out;
+       r = copy_to_user(regs->saved_stack, (void *)vcpu, IA64_STK_OFFSET);
+       if (r)
+               goto out;
+       SAVE_REGS(mp_state);
+       SAVE_REGS(vmm_rr);
+       memcpy(regs->itrs, vcpu->arch.itrs, sizeof(struct thash_data) * NITRS);
+       memcpy(regs->dtrs, vcpu->arch.dtrs, sizeof(struct thash_data) * NDTRS);
+       SAVE_REGS(itr_regions);
+       SAVE_REGS(dtr_regions);
+       SAVE_REGS(tc_regions);
+       SAVE_REGS(irq_check);
+       SAVE_REGS(itc_check);
+       SAVE_REGS(timer_check);
+       SAVE_REGS(timer_pending);
+       SAVE_REGS(last_itc);
+       for (i = 0; i < 8; i++) {
+               regs->vrr[i] = vcpu->arch.vrr[i];
+               regs->ibr[i] = vcpu->arch.ibr[i];
+               regs->dbr[i] = vcpu->arch.dbr[i];
+       }
+       for (i = 0; i < 4; i++)
+               regs->insvc[i] = vcpu->arch.insvc[i];
+       regs->saved_itc = vcpu->arch.itc_offset + ia64_getreg(_IA64_REG_AR_ITC);
+       SAVE_REGS(xtp);
+       SAVE_REGS(metaphysical_rr0);
+       SAVE_REGS(metaphysical_rr4);
+       SAVE_REGS(metaphysical_saved_rr0);
+       SAVE_REGS(metaphysical_saved_rr4);
+       SAVE_REGS(fp_psr);
+       SAVE_REGS(saved_gp);
+       vcpu_put(vcpu);
+       r = 0;
+out:
+       return r;
+}
+
+void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
+{
+
+       hrtimer_cancel(&vcpu->arch.hlt_timer);
+       kfree(vcpu->arch.apic);
+}
+
+
+long kvm_arch_vcpu_ioctl(struct file *filp,
+               unsigned int ioctl, unsigned long arg)
+{
+       return -EINVAL;
+}
+
+int kvm_arch_set_memory_region(struct kvm *kvm,
+               struct kvm_userspace_memory_region *mem,
+               struct kvm_memory_slot old,
+               int user_alloc)
+{
+       unsigned long i;
+       struct page *page;
+       int npages = mem->memory_size >> PAGE_SHIFT;
+       struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot];
+       unsigned long base_gfn = memslot->base_gfn;
+
+       for (i = 0; i < npages; i++) {
+               page = gfn_to_page(kvm, base_gfn + i);
+               kvm_set_pmt_entry(kvm, base_gfn + i,
+                               page_to_pfn(page) << PAGE_SHIFT,
+                               _PAGE_AR_RWX|_PAGE_MA_WB);
+               memslot->rmap[i] = (unsigned long)page;
+       }
+
+       return 0;
+}
+
+
+long kvm_arch_dev_ioctl(struct file *filp,
+               unsigned int ioctl, unsigned long arg)
+{
+       return -EINVAL;
+}
+
+void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
+{
+       kvm_vcpu_uninit(vcpu);
+}
+
+static int vti_cpu_has_kvm_support(void)
+{
+       long  avail = 1, status = 1, control = 1;
+       long ret;
+
+       ret = ia64_pal_proc_get_features(&avail, &status, &control, 0);
+       if (ret)
+               goto out;
+
+       if (!(avail & PAL_PROC_VM_BIT))
+               goto out;
+
+       printk(KERN_DEBUG"kvm: Hardware Supports VT\n");
+
+       ret = ia64_pal_vp_env_info(&kvm_vm_buffer_size, &vp_env_info);
+       if (ret)
+               goto out;
+       printk(KERN_DEBUG"kvm: VM Buffer Size:0x%lx\n", kvm_vm_buffer_size);
+
+       if (!(vp_env_info & VP_OPCODE)) {
+               printk(KERN_WARNING"kvm: No opcode ability on hardware, "
+                               "vm_env_info:0x%lx\n", vp_env_info);
+       }
+
+       return 1;
+out:
+       return 0;
+}
+
+static int kvm_relocate_vmm(struct kvm_vmm_info *vmm_info,
+                                               struct module *module)
+{
+       unsigned long module_base;
+       unsigned long vmm_size;
+
+       unsigned long vmm_offset, func_offset, fdesc_offset;
+       struct fdesc *p_fdesc;
+
+       BUG_ON(!module);
+
+       if (!kvm_vmm_base) {
+               printk("kvm: kvm area hasn't been initilized yet!!\n");
+               return -EFAULT;
+       }
+
+       /*Calculate new position of relocated vmm module.*/
+       module_base = (unsigned long)module->module_core;
+       vmm_size = module->core_size;
+       if (unlikely(vmm_size > KVM_VMM_SIZE))
+               return -EFAULT;
+
+       memcpy((void *)kvm_vmm_base, (void *)module_base, vmm_size);
+       kvm_flush_icache(kvm_vmm_base, vmm_size);
+
+       /*Recalculate kvm_vmm_info based on new VMM*/
+       vmm_offset = vmm_info->vmm_ivt - module_base;
+       kvm_vmm_info->vmm_ivt = KVM_VMM_BASE + vmm_offset;
+       printk(KERN_DEBUG"kvm: Relocated VMM's IVT Base Addr:%lx\n",
+                       kvm_vmm_info->vmm_ivt);
+
+       fdesc_offset = (unsigned long)vmm_info->vmm_entry - module_base;
+       kvm_vmm_info->vmm_entry = (kvm_vmm_entry *)(KVM_VMM_BASE +
+                                                       fdesc_offset);
+       func_offset = *(unsigned long *)vmm_info->vmm_entry - module_base;
+       p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
+       p_fdesc->ip = KVM_VMM_BASE + func_offset;
+       p_fdesc->gp = KVM_VMM_BASE+(p_fdesc->gp - module_base);
+
+       printk(KERN_DEBUG"kvm: Relocated VMM's Init Entry Addr:%lx\n",
+                       KVM_VMM_BASE+func_offset);
+
+       fdesc_offset = (unsigned long)vmm_info->tramp_entry - module_base;
+       kvm_vmm_info->tramp_entry = (kvm_tramp_entry *)(KVM_VMM_BASE +
+                       fdesc_offset);
+       func_offset = *(unsigned long *)vmm_info->tramp_entry - module_base;
+       p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
+       p_fdesc->ip = KVM_VMM_BASE + func_offset;
+       p_fdesc->gp = KVM_VMM_BASE + (p_fdesc->gp - module_base);
+
+       kvm_vmm_gp = p_fdesc->gp;
+
+       printk(KERN_DEBUG"kvm: Relocated VMM's Entry IP:%p\n",
+                                               kvm_vmm_info->vmm_entry);
+       printk(KERN_DEBUG"kvm: Relocated VMM's Trampoline Entry IP:0x%lx\n",
+                                               KVM_VMM_BASE + func_offset);
+
+       return 0;
+}
+
+int kvm_arch_init(void *opaque)
+{
+       int r;
+       struct kvm_vmm_info *vmm_info = (struct kvm_vmm_info *)opaque;
+
+       if (!vti_cpu_has_kvm_support()) {
+               printk(KERN_ERR "kvm: No Hardware Virtualization Support!\n");
+               r = -EOPNOTSUPP;
+               goto out;
+       }
+
+       if (kvm_vmm_info) {
+               printk(KERN_ERR "kvm: Already loaded VMM module!\n");
+               r = -EEXIST;
+               goto out;
+       }
+
+       r = -ENOMEM;
+       kvm_vmm_info = kzalloc(sizeof(struct kvm_vmm_info), GFP_KERNEL);
+       if (!kvm_vmm_info)
+               goto out;
+
+       if (kvm_alloc_vmm_area())
+               goto out_free0;
+
+       r = kvm_relocate_vmm(vmm_info, vmm_info->module);
+       if (r)
+               goto out_free1;
+
+       return 0;
+
+out_free1:
+       kvm_free_vmm_area();
+out_free0:
+       kfree(kvm_vmm_info);
+out:
+       return r;
+}
+
+void kvm_arch_exit(void)
+{
+       kvm_free_vmm_area();
+       kfree(kvm_vmm_info);
+       kvm_vmm_info = NULL;
+}
+
+static int kvm_ia64_sync_dirty_log(struct kvm *kvm,
+               struct kvm_dirty_log *log)
+{
+       struct kvm_memory_slot *memslot;
+       int r, i;
+       long n, base;
+       unsigned long *dirty_bitmap = (unsigned long *)((void *)kvm - KVM_VM_OFS
+                                       + KVM_MEM_DIRTY_LOG_OFS);
+
+       r = -EINVAL;
+       if (log->slot >= KVM_MEMORY_SLOTS)
+               goto out;
+
+       memslot = &kvm->memslots[log->slot];
+       r = -ENOENT;
+       if (!memslot->dirty_bitmap)
+               goto out;
+
+       n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
+       base = memslot->base_gfn / BITS_PER_LONG;
+
+       for (i = 0; i < n/sizeof(long); ++i) {
+               memslot->dirty_bitmap[i] = dirty_bitmap[base + i];
+               dirty_bitmap[base + i] = 0;
+       }
+       r = 0;
+out:
+       return r;
+}
+
+int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
+               struct kvm_dirty_log *log)
+{
+       int r;
+       int n;
+       struct kvm_memory_slot *memslot;
+       int is_dirty = 0;
+
+       spin_lock(&kvm->arch.dirty_log_lock);
+
+       r = kvm_ia64_sync_dirty_log(kvm, log);
+       if (r)
+               goto out;
+
+       r = kvm_get_dirty_log(kvm, log, &is_dirty);
+       if (r)
+               goto out;
+
+       /* If nothing is dirty, don't bother messing with page tables. */
+       if (is_dirty) {
+               kvm_flush_remote_tlbs(kvm);
+               memslot = &kvm->memslots[log->slot];
+               n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
+               memset(memslot->dirty_bitmap, 0, n);
+       }
+       r = 0;
+out:
+       spin_unlock(&kvm->arch.dirty_log_lock);
+       return r;
+}
+
+int kvm_arch_hardware_setup(void)
+{
+       return 0;
+}
+
+void kvm_arch_hardware_unsetup(void)
+{
+}
+
+static void vcpu_kick_intr(void *info)
+{
+#ifdef DEBUG
+       struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info;
+       printk(KERN_DEBUG"vcpu_kick_intr %p \n", vcpu);
+#endif
+}
+
+void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
+{
+       int ipi_pcpu = vcpu->cpu;
+
+       if (waitqueue_active(&vcpu->wq))
+               wake_up_interruptible(&vcpu->wq);
+
+       if (vcpu->guest_mode)
+               smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0, 0);
+}
+
+int kvm_apic_set_irq(struct kvm_vcpu *vcpu, u8 vec, u8 trig)
+{
+
+       struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
+
+       if (!test_and_set_bit(vec, &vpd->irr[0])) {
+               vcpu->arch.irq_new_pending = 1;
+                if (vcpu->arch.mp_state == VCPU_MP_STATE_RUNNABLE)
+                       kvm_vcpu_kick(vcpu);
+               else if (vcpu->arch.mp_state == VCPU_MP_STATE_HALTED) {
+                       vcpu->arch.mp_state = VCPU_MP_STATE_RUNNABLE;
+                       if (waitqueue_active(&vcpu->wq))
+                               wake_up_interruptible(&vcpu->wq);
+               }
+               return 1;
+       }
+       return 0;
+}
+
+int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest)
+{
+       return apic->vcpu->vcpu_id == dest;
+}
+
+int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
+{
+       return 0;
+}
+
+struct kvm_vcpu *kvm_get_lowest_prio_vcpu(struct kvm *kvm, u8 vector,
+                                      unsigned long bitmap)
+{
+       struct kvm_vcpu *lvcpu = kvm->vcpus[0];
+       int i;
+
+       for (i = 1; i < KVM_MAX_VCPUS; i++) {
+               if (!kvm->vcpus[i])
+                       continue;
+               if (lvcpu->arch.xtp > kvm->vcpus[i]->arch.xtp)
+                       lvcpu = kvm->vcpus[i];
+       }
+
+       return lvcpu;
+}
+
+static int find_highest_bits(int *dat)
+{
+       u32  bits, bitnum;
+       int i;
+
+       /* loop for all 256 bits */
+       for (i = 7; i >= 0 ; i--) {
+               bits = dat[i];
+               if (bits) {
+                       bitnum = fls(bits);
+                       return i * 32 + bitnum - 1;
+               }
+       }
+
+       return -1;
+}
+
+int kvm_highest_pending_irq(struct kvm_vcpu *vcpu)
+{
+    struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
+
+    if (vpd->irr[0] & (1UL << NMI_VECTOR))
+               return NMI_VECTOR;
+    if (vpd->irr[0] & (1UL << ExtINT_VECTOR))
+               return ExtINT_VECTOR;
+
+    return find_highest_bits((int *)&vpd->irr[0]);
+}
+
+int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
+{
+       if (kvm_highest_pending_irq(vcpu) != -1)
+               return 1;
+       return 0;
+}
+
+gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
+{
+       return gfn;
+}
+
+int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
+{
+       return vcpu->arch.mp_state == VCPU_MP_STATE_RUNNABLE;
+}