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Diffstat (limited to 'arch/ia64/kvm/kvm-ia64.c')
-rw-r--r--arch/ia64/kvm/kvm-ia64.c1997
1 files changed, 1997 insertions, 0 deletions
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
new file mode 100644
index 00000000..463fb3bb
--- /dev/null
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -0,0 +1,1997 @@
+/*
+ * 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/fs.h>
+#include <linux/slab.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 <linux/iommu.h>
+#include <linux/intel-iommu.h>
+#include <linux/pci.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 <asm/elf.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/clksupport.h>
+#include <asm/sn/shub_mmr.h>
+
+#include "misc.h"
+#include "vti.h"
+#include "iodev.h"
+#include "ioapic.h"
+#include "lapic.h"
+#include "irq.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 }
+};
+
+static unsigned long kvm_get_itc(struct kvm_vcpu *vcpu)
+{
+#if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
+ if (vcpu->kvm->arch.is_sn2)
+ return rtc_time();
+ else
+#endif
+ return ia64_getreg(_IA64_REG_AR_ITC);
+}
+
+static void kvm_flush_icache(unsigned long start, unsigned long len)
+{
+ int l;
+
+ for (l = 0; l < (len + 32); l += 32)
+ ia64_fc((void *)(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);
+
+int 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);
+ local_irq_restore(saved_psr);
+ if (slot < 0)
+ return -EINVAL;
+
+ 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) {
+ spin_unlock(&vp_lock);
+ printk(KERN_WARNING"kvm: Failed to Enable VT Support!!!!\n");
+ return -EINVAL;
+ }
+
+ 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);
+
+ return 0;
+}
+
+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);
+ local_irq_restore(saved_psr);
+ if (slot < 0)
+ return;
+
+ 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_MP_STATE:
+ case KVM_CAP_IRQ_INJECT_STATUS:
+ r = 1;
+ break;
+ case KVM_CAP_COALESCED_MMIO:
+ r = KVM_COALESCED_MMIO_PAGE_OFFSET;
+ break;
+ case KVM_CAP_IOMMU:
+ r = iommu_present(&pci_bus_type);
+ break;
+ default:
+ r = 0;
+ }
+ return r;
+
+}
+
+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;
+ int r;
+
+ 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:
+ if (p->dir)
+ r = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, p->addr,
+ p->size, &p->data);
+ else
+ r = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, p->addr,
+ p->size, &p->data);
+ if (r)
+ 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;
+ }
+
+}
+
+static int __apic_accept_irq(struct kvm_vcpu *vcpu, uint64_t vector)
+{
+ struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
+
+ if (!test_and_set_bit(vector, &vpd->irr[0])) {
+ vcpu->arch.irq_new_pending = 1;
+ kvm_vcpu_kick(vcpu);
+ return 1;
+ }
+ 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:
+ break;
+ case SAPIC_NMI:
+ vector = 2;
+ break;
+ case SAPIC_EXTINT:
+ vector = 0;
+ break;
+ case SAPIC_INIT:
+ case SAPIC_PMI:
+ default:
+ printk(KERN_ERR"kvm: Unimplemented Deliver reserved IPI!\n");
+ return;
+ }
+ __apic_accept_irq(vcpu, vector);
+}
+
+static struct kvm_vcpu *lid_to_vcpu(struct kvm *kvm, unsigned long id,
+ unsigned long eid)
+{
+ union ia64_lid lid;
+ int i;
+ struct kvm_vcpu *vcpu;
+
+ kvm_for_each_vcpu(i, vcpu, kvm) {
+ lid.val = VCPU_LID(vcpu);
+ if (lid.id == id && lid.eid == eid)
+ return vcpu;
+ }
+
+ 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 = KVM_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;
+ struct kvm_vcpu *vcpui;
+
+ call_data.ptc_g_data = p->u.ptc_g_data;
+
+ kvm_for_each_vcpu(i, vcpui, kvm) {
+ if (vcpui->arch.mp_state == KVM_MP_STATE_UNINITIALIZED ||
+ vcpu == vcpui)
+ continue;
+
+ if (waitqueue_active(&vcpui->wq))
+ wake_up_interruptible(&vcpui->wq);
+
+ if (vcpui->cpu != -1) {
+ call_data.vcpu = vcpui;
+ smp_call_function_single(vcpui->cpu,
+ vcpu_global_purge, &call_data, 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;
+}
+
+static int kvm_sn2_setup_mappings(struct kvm_vcpu *vcpu)
+{
+ unsigned long pte, rtc_phys_addr, map_addr;
+ int slot;
+
+ map_addr = KVM_VMM_BASE + (1UL << KVM_VMM_SHIFT);
+ rtc_phys_addr = LOCAL_MMR_OFFSET | SH_RTC;
+ pte = pte_val(mk_pte_phys(rtc_phys_addr, PAGE_KERNEL_UC));
+ slot = ia64_itr_entry(0x3, map_addr, pte, PAGE_SHIFT);
+ vcpu->arch.sn_rtc_tr_slot = slot;
+ if (slot < 0) {
+ printk(KERN_ERR "Mayday mayday! RTC mapping failed!\n");
+ slot = 0;
+ }
+ return slot;
+}
+
+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);
+
+ if (irqchip_in_kernel(vcpu->kvm)) {
+
+ vcpu_now_itc = kvm_get_itc(vcpu) + 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_u64(itc_diff, cyc_per_usec);
+ kt = ktime_set(0, 1000 * expires);
+
+ vcpu->arch.ht_active = 1;
+ hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
+
+ vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
+ kvm_vcpu_block(vcpu);
+ hrtimer_cancel(p_ht);
+ vcpu->arch.ht_active = 0;
+
+ if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests) ||
+ kvm_cpu_has_pending_timer(vcpu))
+ if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
+ vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
+
+ if (vcpu->arch.mp_state != KVM_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 handle_vcpu_debug(struct kvm_vcpu *vcpu,
+ struct kvm_run *kvm_run)
+{
+ printk("VMM: %s", vcpu->arch.log_buf);
+ 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,
+ [EXIT_REASON_DEBUG] = handle_vcpu_debug,
+
+};
+
+static const int kvm_vti_max_exit_handlers =
+ sizeof(kvm_vti_exit_handlers)/sizeof(*kvm_vti_exit_handlers);
+
+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;
+
+#if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
+ if (kvm->arch.is_sn2) {
+ r = kvm_sn2_setup_mappings(vcpu);
+ if (r < 0)
+ goto out;
+ }
+#endif
+
+ r = 0;
+out:
+ return r;
+}
+
+static void kvm_purge_vmm_mapping(struct kvm_vcpu *vcpu)
+{
+ struct kvm *kvm = vcpu->kvm;
+ ia64_ptr_entry(0x3, vcpu->arch.vmm_tr_slot);
+ ia64_ptr_entry(0x3, vcpu->arch.vm_tr_slot);
+#if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
+ if (kvm->arch.is_sn2)
+ ia64_ptr_entry(0x3, vcpu->arch.sn_rtc_tr_slot);
+#endif
+}
+
+static int kvm_vcpu_pre_transition(struct kvm_vcpu *vcpu)
+{
+ unsigned long psr;
+ int r;
+ 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);
+ local_irq_save(psr);
+ r = kvm_insert_vmm_mapping(vcpu);
+ local_irq_restore(psr);
+ return r;
+}
+
+static void kvm_vcpu_post_transition(struct kvm_vcpu *vcpu)
+{
+ kvm_purge_vmm_mapping(vcpu);
+ vti_set_rr6(vcpu->arch.host_rr6);
+}
+
+static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+ union context *host_ctx, *guest_ctx;
+ int r, idx;
+
+ idx = srcu_read_lock(&vcpu->kvm->srcu);
+
+again:
+ if (signal_pending(current)) {
+ r = -EINTR;
+ kvm_run->exit_reason = KVM_EXIT_INTR;
+ goto out;
+ }
+
+ preempt_disable();
+ local_irq_disable();
+
+ /*Get host and guest context with guest address space.*/
+ host_ctx = kvm_get_host_context(vcpu);
+ guest_ctx = kvm_get_guest_context(vcpu);
+
+ clear_bit(KVM_REQ_KICK, &vcpu->requests);
+
+ r = kvm_vcpu_pre_transition(vcpu);
+ if (r < 0)
+ goto vcpu_run_fail;
+
+ srcu_read_unlock(&vcpu->kvm->srcu, idx);
+ vcpu->mode = IN_GUEST_MODE;
+ kvm_guest_enter();
+
+ /*
+ * Transition to the guest
+ */
+ kvm_vmm_info->tramp_entry(host_ctx, guest_ctx);
+
+ kvm_vcpu_post_transition(vcpu);
+
+ vcpu->arch.launched = 1;
+ set_bit(KVM_REQ_KICK, &vcpu->requests);
+ 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();
+ vcpu->mode = OUTSIDE_GUEST_MODE;
+ preempt_enable();
+
+ idx = srcu_read_lock(&vcpu->kvm->srcu);
+
+ r = kvm_handle_exit(kvm_run, vcpu);
+
+ if (r > 0) {
+ if (!need_resched())
+ goto again;
+ }
+
+out:
+ srcu_read_unlock(&vcpu->kvm->srcu, idx);
+ if (r > 0) {
+ kvm_resched(vcpu);
+ idx = srcu_read_lock(&vcpu->kvm->srcu);
+ goto again;
+ }
+
+ return r;
+
+vcpu_run_fail:
+ local_irq_enable();
+ preempt_enable();
+ kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
+ goto out;
+}
+
+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;
+
+ if (vcpu->sigset_active)
+ sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
+
+ if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
+ kvm_vcpu_block(vcpu);
+ clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
+ r = -EAGAIN;
+ goto out;
+ }
+
+ 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);
+out:
+ if (vcpu->sigset_active)
+ sigprocmask(SIG_SETMASK, &sigsaved, NULL);
+
+ return r;
+}
+
+struct kvm *kvm_arch_alloc_vm(void)
+{
+
+ struct kvm *kvm;
+ uint64_t vm_base;
+
+ BUG_ON(sizeof(struct kvm) > KVM_VM_STRUCT_SIZE);
+
+ vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
+
+ if (!vm_base)
+ return NULL;
+
+ memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
+ kvm = (struct kvm *)(vm_base +
+ offsetof(struct kvm_vm_data, kvm_vm_struct));
+ kvm->arch.vm_base = vm_base;
+ printk(KERN_DEBUG"kvm: vm's data area:0x%lx\n", vm_base);
+
+ return kvm;
+}
+
+struct kvm_ia64_io_range {
+ unsigned long start;
+ unsigned long size;
+ unsigned long type;
+};
+
+static const struct kvm_ia64_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
+
+int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
+{
+ BUG_ON(!kvm);
+
+ if (type)
+ return -EINVAL;
+
+ kvm->arch.is_sn2 = ia64_platform_is("sn2");
+
+ kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
+ kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
+ kvm->arch.vmm_init_rr = VMM_INIT_RR;
+
+ /*
+ *Fill P2M entries for MMIO/IO ranges
+ */
+ kvm_build_io_pmt(kvm);
+
+ INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
+
+ /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
+ set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
+
+ return 0;
+}
+
+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:
+ r = kvm_get_ioapic(kvm, &chip->chip.ioapic);
+ 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:
+ r = kvm_set_ioapic(kvm, &chip->chip.ioapic);
+ 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)
+{
+ struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
+ int i;
+
+ 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;
+
+ memcpy(&vcpu->arch.guest, &regs->saved_guest, sizeof(union context));
+
+ 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 - kvm_get_itc(vcpu);
+ set_bit(KVM_REQ_RESUME, &vcpu->requests);
+
+ return 0;
+}
+
+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 = -ENOTTY;
+
+ 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;
+ r = kvm_setup_default_irq_routing(kvm);
+ if (r) {
+ mutex_lock(&kvm->slots_lock);
+ kvm_ioapic_destroy(kvm);
+ mutex_unlock(&kvm->slots_lock);
+ goto out;
+ }
+ break;
+ case KVM_IRQ_LINE_STATUS:
+ case KVM_IRQ_LINE: {
+ struct kvm_irq_level irq_event;
+
+ r = -EFAULT;
+ if (copy_from_user(&irq_event, argp, sizeof irq_event))
+ goto out;
+ r = -ENXIO;
+ if (irqchip_in_kernel(kvm)) {
+ __s32 status;
+ status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
+ irq_event.irq, irq_event.level);
+ if (ioctl == KVM_IRQ_LINE_STATUS) {
+ r = -EFAULT;
+ irq_event.status = status;
+ if (copy_to_user(argp, &irq_event,
+ sizeof irq_event))
+ goto out;
+ }
+ 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;
+ }
+}
+
+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_expires(p_ht, 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);
+ q = &vcpu->wq;
+
+ if (vcpu->arch.mp_state != KVM_MP_STATE_HALTED)
+ goto out;
+
+ if (waitqueue_active(q))
+ wake_up_interruptible(q);
+
+out:
+ vcpu->arch.timer_fired = 1;
+ vcpu->arch.timer_check = 1;
+ return HRTIMER_NORESTART;
+}
+
+#define PALE_RESET_ENTRY 0x80000000ffffffb0UL
+
+bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu)
+{
+ return irqchip_in_kernel(vcpu->kvm) == (vcpu->arch.apic != NULL);
+}
+
+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 (kvm_vcpu_is_bsp(vcpu)) {
+ vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
+
+ /*Set entry address for first run.*/
+ regs->cr_iip = PALE_RESET_ENTRY;
+
+ /*Initialize itc offset for vcpus*/
+ itc_offset = 0UL - kvm_get_itc(vcpu);
+ for (i = 0; i < KVM_MAX_VCPUS; i++) {
+ v = (struct kvm_vcpu *)((char *)vcpu +
+ sizeof(struct kvm_vcpu_data) * i);
+ v->arch.itc_offset = itc_offset;
+ v->arch.last_itc = 0;
+ }
+ } else
+ vcpu->arch.mp_state = KVM_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 + KVM_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;
+
+ /*Initialize 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;
+
+ /*Initialize 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_BASE(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_BASE(vcpu->vcpu_id);
+ vcpu->arch.vtlb.hash = (struct thash_data *)VTLB_BASE(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);
+ local_irq_restore(psr);
+ 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);
+
+ 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;
+
+ BUG_ON(sizeof(struct kvm_vcpu) > VCPU_STRUCT_SIZE/2);
+
+ r = -EINVAL;
+ if (id >= KVM_MAX_VCPUS) {
+ printk(KERN_ERR"kvm: Can't configure vcpus > %ld",
+ KVM_MAX_VCPUS);
+ goto fail;
+ }
+
+ r = -ENOMEM;
+ if (!vm_base) {
+ printk(KERN_ERR"kvm: Create vcpu[%d] error!\n", id);
+ goto fail;
+ }
+ vcpu = (struct kvm_vcpu *)(vm_base + offsetof(struct kvm_vm_data,
+ vcpu_data[id].vcpu_struct));
+ vcpu->kvm = kvm;
+
+ cpu = get_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_set_guest_debug(struct kvm_vcpu *vcpu,
+ struct kvm_guest_debug *dbg)
+{
+ return -EINVAL;
+}
+
+void kvm_arch_free_vm(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_memslots *slots;
+ struct kvm_memory_slot *memslot;
+ int j;
+ unsigned long base_gfn;
+
+ slots = kvm_memslots(kvm);
+ kvm_for_each_memslot(memslot, slots) {
+ 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_sync_events(struct kvm *kvm)
+{
+}
+
+void kvm_arch_destroy_vm(struct kvm *kvm)
+{
+ kvm_iommu_unmap_guest(kvm);
+#ifdef KVM_CAP_DEVICE_ASSIGNMENT
+ kvm_free_all_assigned_devices(kvm);
+#endif
+ kfree(kvm->arch.vioapic);
+ kvm_release_vm_pages(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)
+{
+ struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
+ int i;
+
+ 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;
+
+ memcpy(&regs->saved_guest, &vcpu->arch.guest, sizeof(union context));
+
+ 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 + kvm_get_itc(vcpu);
+ 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);
+ return 0;
+}
+
+int kvm_arch_vcpu_ioctl_get_stack(struct kvm_vcpu *vcpu,
+ struct kvm_ia64_vcpu_stack *stack)
+{
+ memcpy(stack, vcpu, sizeof(struct kvm_ia64_vcpu_stack));
+ return 0;
+}
+
+int kvm_arch_vcpu_ioctl_set_stack(struct kvm_vcpu *vcpu,
+ struct kvm_ia64_vcpu_stack *stack)
+{
+ memcpy(vcpu + 1, &stack->stack[0] + sizeof(struct kvm_vcpu),
+ sizeof(struct kvm_ia64_vcpu_stack) - sizeof(struct kvm_vcpu));
+
+ vcpu->arch.exit_data = ((struct kvm_vcpu *)stack)->arch.exit_data;
+ return 0;
+}
+
+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)
+{
+ struct kvm_vcpu *vcpu = filp->private_data;
+ void __user *argp = (void __user *)arg;
+ struct kvm_ia64_vcpu_stack *stack = NULL;
+ long r;
+
+ switch (ioctl) {
+ case KVM_IA64_VCPU_GET_STACK: {
+ struct kvm_ia64_vcpu_stack __user *user_stack;
+ void __user *first_p = argp;
+
+ r = -EFAULT;
+ if (copy_from_user(&user_stack, first_p, sizeof(void *)))
+ goto out;
+
+ if (!access_ok(VERIFY_WRITE, user_stack,
+ sizeof(struct kvm_ia64_vcpu_stack))) {
+ printk(KERN_INFO "KVM_IA64_VCPU_GET_STACK: "
+ "Illegal user destination address for stack\n");
+ goto out;
+ }
+ stack = kzalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
+ if (!stack) {
+ r = -ENOMEM;
+ goto out;
+ }
+
+ r = kvm_arch_vcpu_ioctl_get_stack(vcpu, stack);
+ if (r)
+ goto out;
+
+ if (copy_to_user(user_stack, stack,
+ sizeof(struct kvm_ia64_vcpu_stack))) {
+ r = -EFAULT;
+ goto out;
+ }
+
+ break;
+ }
+ case KVM_IA64_VCPU_SET_STACK: {
+ struct kvm_ia64_vcpu_stack __user *user_stack;
+ void __user *first_p = argp;
+
+ r = -EFAULT;
+ if (copy_from_user(&user_stack, first_p, sizeof(void *)))
+ goto out;
+
+ if (!access_ok(VERIFY_READ, user_stack,
+ sizeof(struct kvm_ia64_vcpu_stack))) {
+ printk(KERN_INFO "KVM_IA64_VCPU_SET_STACK: "
+ "Illegal user address for stack\n");
+ goto out;
+ }
+ stack = kmalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
+ if (!stack) {
+ r = -ENOMEM;
+ goto out;
+ }
+ if (copy_from_user(stack, user_stack,
+ sizeof(struct kvm_ia64_vcpu_stack)))
+ goto out;
+
+ r = kvm_arch_vcpu_ioctl_set_stack(vcpu, stack);
+ break;
+ }
+
+ default:
+ r = -EINVAL;
+ }
+
+out:
+ kfree(stack);
+ return r;
+}
+
+int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
+{
+ return VM_FAULT_SIGBUS;
+}
+
+void kvm_arch_free_memslot(struct kvm_memory_slot *free,
+ struct kvm_memory_slot *dont)
+{
+}
+
+int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
+{
+ return 0;
+}
+
+int kvm_arch_prepare_memory_region(struct kvm *kvm,
+ struct kvm_memory_slot *memslot,
+ struct kvm_memory_slot old,
+ struct kvm_userspace_memory_region *mem,
+ int user_alloc)
+{
+ unsigned long i;
+ unsigned long pfn;
+ int npages = memslot->npages;
+ unsigned long base_gfn = memslot->base_gfn;
+
+ if (base_gfn + npages > (KVM_MAX_MEM_SIZE >> PAGE_SHIFT))
+ return -ENOMEM;
+
+ for (i = 0; i < npages; i++) {
+ pfn = gfn_to_pfn(kvm, base_gfn + i);
+ if (!kvm_is_mmio_pfn(pfn)) {
+ kvm_set_pmt_entry(kvm, base_gfn + i,
+ pfn << PAGE_SHIFT,
+ _PAGE_AR_RWX | _PAGE_MA_WB);
+ memslot->rmap[i] = (unsigned long)pfn_to_page(pfn);
+ } else {
+ kvm_set_pmt_entry(kvm, base_gfn + i,
+ GPFN_PHYS_MMIO | (pfn << PAGE_SHIFT),
+ _PAGE_MA_UC);
+ memslot->rmap[i] = 0;
+ }
+ }
+
+ return 0;
+}
+
+void kvm_arch_commit_memory_region(struct kvm *kvm,
+ struct kvm_userspace_memory_region *mem,
+ struct kvm_memory_slot old,
+ int user_alloc)
+{
+ return;
+}
+
+void kvm_arch_flush_shadow(struct kvm *kvm)
+{
+ kvm_flush_remote_tlbs(kvm);
+}
+
+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;
+}
+
+
+/*
+ * On SN2, the ITC isn't stable, so copy in fast path code to use the
+ * SN2 RTC, replacing the ITC based default verion.
+ */
+static void kvm_patch_vmm(struct kvm_vmm_info *vmm_info,
+ struct module *module)
+{
+ unsigned long new_ar, new_ar_sn2;
+ unsigned long module_base;
+
+ if (!ia64_platform_is("sn2"))
+ return;
+
+ module_base = (unsigned long)module->module_core;
+
+ new_ar = kvm_vmm_base + vmm_info->patch_mov_ar - module_base;
+ new_ar_sn2 = kvm_vmm_base + vmm_info->patch_mov_ar_sn2 - module_base;
+
+ printk(KERN_INFO "kvm: Patching ITC emulation to use SGI SN2 RTC "
+ "as source\n");
+
+ /*
+ * Copy the SN2 version of mov_ar into place. They are both
+ * the same size, so 6 bundles is sufficient (6 * 0x10).
+ */
+ memcpy((void *)new_ar, (void *)new_ar_sn2, 0x60);
+}
+
+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 initialized 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_patch_vmm(vmm_info, module);
+ 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 void kvm_ia64_sync_dirty_log(struct kvm *kvm,
+ struct kvm_memory_slot *memslot)
+{
+ int i;
+ long base;
+ unsigned long n;
+ unsigned long *dirty_bitmap = (unsigned long *)(kvm->arch.vm_base +
+ offsetof(struct kvm_vm_data, kvm_mem_dirty_log));
+
+ n = kvm_dirty_bitmap_bytes(memslot);
+ base = memslot->base_gfn / BITS_PER_LONG;
+
+ spin_lock(&kvm->arch.dirty_log_lock);
+ for (i = 0; i < n/sizeof(long); ++i) {
+ memslot->dirty_bitmap[i] = dirty_bitmap[base + i];
+ dirty_bitmap[base + i] = 0;
+ }
+ spin_unlock(&kvm->arch.dirty_log_lock);
+}
+
+int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
+ struct kvm_dirty_log *log)
+{
+ int r;
+ unsigned long n;
+ struct kvm_memory_slot *memslot;
+ int is_dirty = 0;
+
+ mutex_lock(&kvm->slots_lock);
+
+ r = -EINVAL;
+ if (log->slot >= KVM_MEMORY_SLOTS)
+ goto out;
+
+ memslot = id_to_memslot(kvm->memslots, log->slot);
+ r = -ENOENT;
+ if (!memslot->dirty_bitmap)
+ goto out;
+
+ kvm_ia64_sync_dirty_log(kvm, memslot);
+ 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);
+ n = kvm_dirty_bitmap_bytes(memslot);
+ memset(memslot->dirty_bitmap, 0, n);
+ }
+ r = 0;
+out:
+ mutex_unlock(&kvm->slots_lock);
+ return r;
+}
+
+int kvm_arch_hardware_setup(void)
+{
+ return 0;
+}
+
+void kvm_arch_hardware_unsetup(void)
+{
+}
+
+void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
+{
+ int me;
+ int cpu = vcpu->cpu;
+
+ if (waitqueue_active(&vcpu->wq))
+ wake_up_interruptible(&vcpu->wq);
+
+ me = get_cpu();
+ if (cpu != me && (unsigned) cpu < nr_cpu_ids && cpu_online(cpu))
+ if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests))
+ smp_send_reschedule(cpu);
+ put_cpu();
+}
+
+int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq)
+{
+ return __apic_accept_irq(vcpu, irq->vector);
+}
+
+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;
+}
+
+int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2)
+{
+ return vcpu1->arch.xtp - vcpu2->arch.xtp;
+}
+
+int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
+ int short_hand, int dest, int dest_mode)
+{
+ struct kvm_lapic *target = vcpu->arch.apic;
+ return (dest_mode == 0) ?
+ kvm_apic_match_physical_addr(target, dest) :
+ kvm_apic_match_logical_addr(target, dest);
+}
+
+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_pending_timer(struct kvm_vcpu *vcpu)
+{
+ return vcpu->arch.timer_fired;
+}
+
+int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
+{
+ return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) ||
+ (kvm_highest_pending_irq(vcpu) != -1);
+}
+
+int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
+ struct kvm_mp_state *mp_state)
+{
+ mp_state->mp_state = vcpu->arch.mp_state;
+ return 0;
+}
+
+static int vcpu_reset(struct kvm_vcpu *vcpu)
+{
+ int r;
+ long psr;
+ local_irq_save(psr);
+ r = kvm_insert_vmm_mapping(vcpu);
+ local_irq_restore(psr);
+ if (r)
+ goto fail;
+
+ vcpu->arch.launched = 0;
+ kvm_arch_vcpu_uninit(vcpu);
+ r = kvm_arch_vcpu_init(vcpu);
+ if (r)
+ goto fail;
+
+ kvm_purge_vmm_mapping(vcpu);
+ r = 0;
+fail:
+ return r;
+}
+
+int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
+ struct kvm_mp_state *mp_state)
+{
+ int r = 0;
+
+ vcpu->arch.mp_state = mp_state->mp_state;
+ if (vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)
+ r = vcpu_reset(vcpu);
+ return r;
+}
generated by cgit (git 2.34.1) at 2025-01-12 14:49:38 +0000