diff options
Diffstat (limited to 'arch/ia64/kvm/kvm-ia64.c')
| -rw-r--r-- | arch/ia64/kvm/kvm-ia64.c | 1942 |
1 files changed, 0 insertions, 1942 deletions
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c deleted file mode 100644 index dbe46f43884d..000000000000 --- a/arch/ia64/kvm/kvm-ia64.c +++ /dev/null @@ -1,1942 +0,0 @@ -/* - * kvm_ia64.c: Basic KVM support 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) -{ - 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) -{ - - 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_vm_ioctl_check_extension(struct kvm *kvm, long ext) -{ - - int r; - - switch (ext) { - case KVM_CAP_IRQCHIP: - case KVM_CAP_MP_STATE: - case KVM_CAP_IRQ_INJECT_STATUS: - case KVM_CAP_IOAPIC_POLARITY_IGNORED: - r = 1; - break; - case KVM_CAP_COALESCED_MMIO: - r = KVM_COALESCED_MMIO_PAGE_OFFSET; - break; -#ifdef CONFIG_KVM_DEVICE_ASSIGNMENT - case KVM_CAP_IOMMU: - r = iommu_present(&pci_bus_type); - break; -#endif - 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_fragments[0].gpa = kvm_run->mmio.phys_addr = p->addr; - vcpu->mmio_fragments[0].len = kvm_run->mmio.len = p->size; - vcpu->mmio_is_write = kvm_run->mmio.is_write = !p->dir; - - if (vcpu->mmio_is_write) - memcpy(vcpu->arch.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) { - cond_resched(); - 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->arch.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->arch.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, ®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 - kvm_get_itc(vcpu); - set_bit(KVM_REQ_RESUME, &vcpu->requests); - - return 0; -} - -int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, - bool line_status) -{ - if (!irqchip_in_kernel(kvm)) - return -ENXIO; - - irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, - irq_event->irq, irq_event->level, - line_status); - 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_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_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_postcreate(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; - - slots = kvm_memslots(kvm); - kvm_for_each_memslot(memslot, slots) { - for (j = 0; j < memslot->npages; j++) { - if (memslot->rmap[j]) - put_page((struct page *)memslot->rmap[j]); - } - } -} - -void kvm_arch_destroy_vm(struct kvm *kvm) -{ - kvm_iommu_unmap_guest(kvm); - kvm_free_all_assigned_devices(kvm); - kfree(kvm->arch.vioapic); - kvm_release_vm_pages(kvm); -} - -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 + 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; -} - -int kvm_arch_create_memslot(struct kvm *kvm, 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_userspace_memory_region *mem, - enum kvm_mr_change change) -{ - 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_reserved_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_all(struct kvm *kvm) -{ - kvm_flush_remote_tlbs(kvm); -} - -void kvm_arch_flush_shadow_memslot(struct kvm *kvm, - struct kvm_memory_slot *slot) -{ - kvm_arch_flush_shadow_all(); -} - -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_USER_MEM_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; -} - -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_should_kick(struct kvm_vcpu *vcpu) -{ - return (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests)); -} - -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; -} |
