| /* |
| * 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 <linux/iommu.h> |
| #include <linux/intel-iommu.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 "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 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); |
| |
| 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); |
| local_irq_restore(saved_psr); |
| if (slot < 0) |
| return; |
| |
| 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); |
| 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_found(); |
| break; |
| default: |
| r = 0; |
| } |
| return r; |
| |
| } |
| |
| static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu, |
| gpa_t addr, int len, int is_write) |
| { |
| struct kvm_io_device *dev; |
| |
| dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr, len, is_write); |
| |
| 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, p->size, !p->dir); |
| 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, dm, 0); |
| break; |
| case SAPIC_NMI: |
| kvm_apic_set_irq(vcpu, 2, dm, 0); |
| break; |
| case SAPIC_EXTINT: |
| kvm_apic_set_irq(vcpu, 0, dm, 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->arch.online_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 = 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; |
| |
| call_data.ptc_g_data = p->u.ptc_g_data; |
| |
| for (i = 0; i < kvm->arch.online_vcpus; i++) { |
| if (!kvm->vcpus[i] || kvm->vcpus[i]->arch.mp_state == |
| KVM_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, 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); |
| |
| if (irqchip_in_kernel(vcpu->kvm)) { |
| |
| 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_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)) |
| 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; |
| 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: |
| if (signal_pending(current)) { |
| r = -EINTR; |
| kvm_run->exit_reason = KVM_EXIT_INTR; |
| goto out; |
| } |
| |
| /* |
| * down_read() may sleep and return with interrupts enabled |
| */ |
| down_read(&vcpu->kvm->slots_lock); |
| |
| preempt_disable(); |
| local_irq_disable(); |
| |
| 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(); |
| up_read(&vcpu->kvm->slots_lock); |
| 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 (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); |
| |
| vcpu_put(vcpu); |
| return r; |
| } |
| |
| static struct kvm *kvm_alloc_kvm(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 ERR_PTR(-ENOMEM); |
| |
| 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_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) |
| { |
| 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; |
| |
| /* |
| *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); |
| } |
| |
| 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); |
| |
| kvm->arch.online_vcpus = 0; |
| |
| 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) |
| { |
| struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd); |
| int i; |
| |
| 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; |
| |
| memcpy(&vcpu->arch.guest, ®s->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 - ia64_getreg(_IA64_REG_AR_ITC); |
| set_bit(KVM_REQ_RESUME, &vcpu->requests); |
| |
| vcpu_put(vcpu); |
| |
| 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 = -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; |
| r = kvm_setup_default_irq_routing(kvm); |
| if (r) { |
| kfree(kvm->arch.vioapic); |
| 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; |
| if (irqchip_in_kernel(kvm)) { |
| __s32 status; |
| mutex_lock(&kvm->lock); |
| status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
| irq_event.irq, irq_event.level); |
| mutex_unlock(&kvm->lock); |
| if (ioctl == KVM_IRQ_LINE_STATUS) { |
| 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 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_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 |
| |
| 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 = KVM_MP_STATE_RUNNABLE; |
| |
| /*Set entry address for first run.*/ |
| regs->cr_iip = PALE_RESET_ENTRY; |
| |
| /*Initialize itc offset for vcpus*/ |
| itc_offset = 0UL - ia64_getreg(_IA64_REG_AR_ITC); |
| for (i = 0; i < kvm->arch.online_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; |
| |
| /*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_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); |
| 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: |
| local_irq_restore(psr); |
| 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(); |
| 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; |
| } |
| |
| kvm->arch.online_vcpus++; |
| |
| 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; |
| } |
| |
| 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_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); |
| 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) |
| { |
| 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(®s->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 + 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); |
| 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))) |
| 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_set_memory_region(struct kvm *kvm, |
| struct kvm_userspace_memory_region *mem, |
| struct kvm_memory_slot old, |
| int user_alloc) |
| { |
| unsigned long i; |
| unsigned long pfn; |
| int npages = mem->memory_size >> PAGE_SHIFT; |
| struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot]; |
| 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_flush_shadow(struct kvm *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; |
| } |
| |
| 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 *)(kvm->arch.vm_base + |
| offsetof(struct kvm_vm_data, kvm_mem_dirty_log)); |
| |
| 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; |
| int cpu = get_cpu(); |
| |
| if (waitqueue_active(&vcpu->wq)) |
| wake_up_interruptible(&vcpu->wq); |
| |
| if (vcpu->guest_mode && cpu != ipi_pcpu) |
| smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0); |
| put_cpu(); |
| } |
| |
| int kvm_apic_set_irq(struct kvm_vcpu *vcpu, u8 vec, u8 dmode, 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; |
| kvm_vcpu_kick(vcpu); |
| 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; |
| } |
| |
| 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) |
| { |
| 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_interrupt(struct kvm_vcpu *vcpu) |
| { |
| if (kvm_highest_pending_irq(vcpu) != -1) |
| return 1; |
| return 0; |
| } |
| |
| int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
| { |
| return vcpu->arch.timer_fired; |
| } |
| |
| 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 == KVM_MP_STATE_RUNNABLE; |
| } |
| |
| int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
| struct kvm_mp_state *mp_state) |
| { |
| vcpu_load(vcpu); |
| mp_state->mp_state = vcpu->arch.mp_state; |
| vcpu_put(vcpu); |
| return 0; |
| } |
| |
| static int vcpu_reset(struct kvm_vcpu *vcpu) |
| { |
| int r; |
| long psr; |
| local_irq_save(psr); |
| r = kvm_insert_vmm_mapping(vcpu); |
| 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: |
| local_irq_restore(psr); |
| return r; |
| } |
| |
| int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, |
| struct kvm_mp_state *mp_state) |
| { |
| int r = 0; |
| |
| vcpu_load(vcpu); |
| vcpu->arch.mp_state = mp_state->mp_state; |
| if (vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED) |
| r = vcpu_reset(vcpu); |
| vcpu_put(vcpu); |
| return r; |
| } |