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-rw-r--r--drivers/kvm/kvm_main.c3628
1 files changed, 0 insertions, 3628 deletions
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
deleted file mode 100644
index c0f372f1d76..00000000000
--- a/drivers/kvm/kvm_main.c
+++ /dev/null
@@ -1,3628 +0,0 @@
-/*
- * Kernel-based Virtual Machine driver for Linux
- *
- * This module enables machines with Intel VT-x extensions to run virtual
- * machines without emulation or binary translation.
- *
- * Copyright (C) 2006 Qumranet, Inc.
- *
- * Authors:
- * Avi Kivity <avi@qumranet.com>
- * Yaniv Kamay <yaniv@qumranet.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- *
- */
-
-#include "kvm.h"
-#include "x86_emulate.h"
-#include "segment_descriptor.h"
-#include "irq.h"
-
-#include <linux/kvm.h>
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/percpu.h>
-#include <linux/gfp.h>
-#include <linux/mm.h>
-#include <linux/miscdevice.h>
-#include <linux/vmalloc.h>
-#include <linux/reboot.h>
-#include <linux/debugfs.h>
-#include <linux/highmem.h>
-#include <linux/file.h>
-#include <linux/sysdev.h>
-#include <linux/cpu.h>
-#include <linux/sched.h>
-#include <linux/cpumask.h>
-#include <linux/smp.h>
-#include <linux/anon_inodes.h>
-#include <linux/profile.h>
-
-#include <asm/processor.h>
-#include <asm/msr.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/desc.h>
-
-MODULE_AUTHOR("Qumranet");
-MODULE_LICENSE("GPL");
-
-static DEFINE_SPINLOCK(kvm_lock);
-static LIST_HEAD(vm_list);
-
-static cpumask_t cpus_hardware_enabled;
-
-struct kvm_x86_ops *kvm_x86_ops;
-struct kmem_cache *kvm_vcpu_cache;
-EXPORT_SYMBOL_GPL(kvm_vcpu_cache);
-
-static __read_mostly struct preempt_ops kvm_preempt_ops;
-
-#define STAT_OFFSET(x) offsetof(struct kvm_vcpu, stat.x)
-
-static struct kvm_stats_debugfs_item {
- const char *name;
- int offset;
- struct dentry *dentry;
-} debugfs_entries[] = {
- { "pf_fixed", STAT_OFFSET(pf_fixed) },
- { "pf_guest", STAT_OFFSET(pf_guest) },
- { "tlb_flush", STAT_OFFSET(tlb_flush) },
- { "invlpg", STAT_OFFSET(invlpg) },
- { "exits", STAT_OFFSET(exits) },
- { "io_exits", STAT_OFFSET(io_exits) },
- { "mmio_exits", STAT_OFFSET(mmio_exits) },
- { "signal_exits", STAT_OFFSET(signal_exits) },
- { "irq_window", STAT_OFFSET(irq_window_exits) },
- { "halt_exits", STAT_OFFSET(halt_exits) },
- { "halt_wakeup", STAT_OFFSET(halt_wakeup) },
- { "request_irq", STAT_OFFSET(request_irq_exits) },
- { "irq_exits", STAT_OFFSET(irq_exits) },
- { "light_exits", STAT_OFFSET(light_exits) },
- { "efer_reload", STAT_OFFSET(efer_reload) },
- { NULL }
-};
-
-static struct dentry *debugfs_dir;
-
-#define MAX_IO_MSRS 256
-
-#define CR0_RESERVED_BITS \
- (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
- | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
- | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
-#define CR4_RESERVED_BITS \
- (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
- | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
- | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
- | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
-
-#define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
-#define EFER_RESERVED_BITS 0xfffffffffffff2fe
-
-#ifdef CONFIG_X86_64
-// LDT or TSS descriptor in the GDT. 16 bytes.
-struct segment_descriptor_64 {
- struct segment_descriptor s;
- u32 base_higher;
- u32 pad_zero;
-};
-
-#endif
-
-static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl,
- unsigned long arg);
-
-unsigned long segment_base(u16 selector)
-{
- struct descriptor_table gdt;
- struct segment_descriptor *d;
- unsigned long table_base;
- typedef unsigned long ul;
- unsigned long v;
-
- if (selector == 0)
- return 0;
-
- asm ("sgdt %0" : "=m"(gdt));
- table_base = gdt.base;
-
- if (selector & 4) { /* from ldt */
- u16 ldt_selector;
-
- asm ("sldt %0" : "=g"(ldt_selector));
- table_base = segment_base(ldt_selector);
- }
- d = (struct segment_descriptor *)(table_base + (selector & ~7));
- v = d->base_low | ((ul)d->base_mid << 16) | ((ul)d->base_high << 24);
-#ifdef CONFIG_X86_64
- if (d->system == 0
- && (d->type == 2 || d->type == 9 || d->type == 11))
- v |= ((ul)((struct segment_descriptor_64 *)d)->base_higher) << 32;
-#endif
- return v;
-}
-EXPORT_SYMBOL_GPL(segment_base);
-
-static inline int valid_vcpu(int n)
-{
- return likely(n >= 0 && n < KVM_MAX_VCPUS);
-}
-
-void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
-{
- if (!vcpu->fpu_active || vcpu->guest_fpu_loaded)
- return;
-
- vcpu->guest_fpu_loaded = 1;
- fx_save(&vcpu->host_fx_image);
- fx_restore(&vcpu->guest_fx_image);
-}
-EXPORT_SYMBOL_GPL(kvm_load_guest_fpu);
-
-void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
-{
- if (!vcpu->guest_fpu_loaded)
- return;
-
- vcpu->guest_fpu_loaded = 0;
- fx_save(&vcpu->guest_fx_image);
- fx_restore(&vcpu->host_fx_image);
-}
-EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
-
-/*
- * Switches to specified vcpu, until a matching vcpu_put()
- */
-static void vcpu_load(struct kvm_vcpu *vcpu)
-{
- int cpu;
-
- mutex_lock(&vcpu->mutex);
- cpu = get_cpu();
- preempt_notifier_register(&vcpu->preempt_notifier);
- kvm_x86_ops->vcpu_load(vcpu, cpu);
- put_cpu();
-}
-
-static void vcpu_put(struct kvm_vcpu *vcpu)
-{
- preempt_disable();
- kvm_x86_ops->vcpu_put(vcpu);
- preempt_notifier_unregister(&vcpu->preempt_notifier);
- preempt_enable();
- mutex_unlock(&vcpu->mutex);
-}
-
-static void ack_flush(void *_completed)
-{
-}
-
-void kvm_flush_remote_tlbs(struct kvm *kvm)
-{
- int i, cpu;
- cpumask_t cpus;
- struct kvm_vcpu *vcpu;
-
- cpus_clear(cpus);
- for (i = 0; i < KVM_MAX_VCPUS; ++i) {
- vcpu = kvm->vcpus[i];
- if (!vcpu)
- continue;
- if (test_and_set_bit(KVM_TLB_FLUSH, &vcpu->requests))
- continue;
- cpu = vcpu->cpu;
- if (cpu != -1 && cpu != raw_smp_processor_id())
- cpu_set(cpu, cpus);
- }
- smp_call_function_mask(cpus, ack_flush, NULL, 1);
-}
-
-int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
-{
- struct page *page;
- int r;
-
- mutex_init(&vcpu->mutex);
- vcpu->cpu = -1;
- vcpu->mmu.root_hpa = INVALID_PAGE;
- vcpu->kvm = kvm;
- vcpu->vcpu_id = id;
- if (!irqchip_in_kernel(kvm) || id == 0)
- vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
- else
- vcpu->mp_state = VCPU_MP_STATE_UNINITIALIZED;
- init_waitqueue_head(&vcpu->wq);
-
- page = alloc_page(GFP_KERNEL | __GFP_ZERO);
- if (!page) {
- r = -ENOMEM;
- goto fail;
- }
- vcpu->run = page_address(page);
-
- page = alloc_page(GFP_KERNEL | __GFP_ZERO);
- if (!page) {
- r = -ENOMEM;
- goto fail_free_run;
- }
- vcpu->pio_data = page_address(page);
-
- r = kvm_mmu_create(vcpu);
- if (r < 0)
- goto fail_free_pio_data;
-
- return 0;
-
-fail_free_pio_data:
- free_page((unsigned long)vcpu->pio_data);
-fail_free_run:
- free_page((unsigned long)vcpu->run);
-fail:
- return -ENOMEM;
-}
-EXPORT_SYMBOL_GPL(kvm_vcpu_init);
-
-void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
-{
- kvm_mmu_destroy(vcpu);
- if (vcpu->apic)
- hrtimer_cancel(&vcpu->apic->timer.dev);
- kvm_free_apic(vcpu->apic);
- free_page((unsigned long)vcpu->pio_data);
- free_page((unsigned long)vcpu->run);
-}
-EXPORT_SYMBOL_GPL(kvm_vcpu_uninit);
-
-static struct kvm *kvm_create_vm(void)
-{
- struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
-
- if (!kvm)
- return ERR_PTR(-ENOMEM);
-
- kvm_io_bus_init(&kvm->pio_bus);
- mutex_init(&kvm->lock);
- INIT_LIST_HEAD(&kvm->active_mmu_pages);
- kvm_io_bus_init(&kvm->mmio_bus);
- spin_lock(&kvm_lock);
- list_add(&kvm->vm_list, &vm_list);
- spin_unlock(&kvm_lock);
- return kvm;
-}
-
-/*
- * Free any memory in @free but not in @dont.
- */
-static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
- struct kvm_memory_slot *dont)
-{
- int i;
-
- if (!dont || free->phys_mem != dont->phys_mem)
- if (free->phys_mem) {
- for (i = 0; i < free->npages; ++i)
- if (free->phys_mem[i])
- __free_page(free->phys_mem[i]);
- vfree(free->phys_mem);
- }
-
- if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
- vfree(free->dirty_bitmap);
-
- free->phys_mem = NULL;
- free->npages = 0;
- free->dirty_bitmap = NULL;
-}
-
-static void kvm_free_physmem(struct kvm *kvm)
-{
- int i;
-
- for (i = 0; i < kvm->nmemslots; ++i)
- kvm_free_physmem_slot(&kvm->memslots[i], NULL);
-}
-
-static void free_pio_guest_pages(struct kvm_vcpu *vcpu)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(vcpu->pio.guest_pages); ++i)
- if (vcpu->pio.guest_pages[i]) {
- __free_page(vcpu->pio.guest_pages[i]);
- vcpu->pio.guest_pages[i] = NULL;
- }
-}
-
-static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
-{
- vcpu_load(vcpu);
- kvm_mmu_unload(vcpu);
- vcpu_put(vcpu);
-}
-
-static void kvm_free_vcpus(struct kvm *kvm)
-{
- unsigned int i;
-
- /*
- * Unpin any mmu pages first.
- */
- for (i = 0; i < KVM_MAX_VCPUS; ++i)
- if (kvm->vcpus[i])
- kvm_unload_vcpu_mmu(kvm->vcpus[i]);
- for (i = 0; i < KVM_MAX_VCPUS; ++i) {
- if (kvm->vcpus[i]) {
- kvm_x86_ops->vcpu_free(kvm->vcpus[i]);
- kvm->vcpus[i] = NULL;
- }
- }
-
-}
-
-static void kvm_destroy_vm(struct kvm *kvm)
-{
- spin_lock(&kvm_lock);
- list_del(&kvm->vm_list);
- spin_unlock(&kvm_lock);
- kvm_io_bus_destroy(&kvm->pio_bus);
- kvm_io_bus_destroy(&kvm->mmio_bus);
- kfree(kvm->vpic);
- kfree(kvm->vioapic);
- kvm_free_vcpus(kvm);
- kvm_free_physmem(kvm);
- kfree(kvm);
-}
-
-static int kvm_vm_release(struct inode *inode, struct file *filp)
-{
- struct kvm *kvm = filp->private_data;
-
- kvm_destroy_vm(kvm);
- return 0;
-}
-
-static void inject_gp(struct kvm_vcpu *vcpu)
-{
- kvm_x86_ops->inject_gp(vcpu, 0);
-}
-
-/*
- * Load the pae pdptrs. Return true is they are all valid.
- */
-static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
-{
- gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
- unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
- int i;
- u64 *pdpt;
- int ret;
- struct page *page;
- u64 pdpte[ARRAY_SIZE(vcpu->pdptrs)];
-
- mutex_lock(&vcpu->kvm->lock);
- page = gfn_to_page(vcpu->kvm, pdpt_gfn);
- if (!page) {
- ret = 0;
- goto out;
- }
-
- pdpt = kmap_atomic(page, KM_USER0);
- memcpy(pdpte, pdpt+offset, sizeof(pdpte));
- kunmap_atomic(pdpt, KM_USER0);
-
- for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
- if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) {
- ret = 0;
- goto out;
- }
- }
- ret = 1;
-
- memcpy(vcpu->pdptrs, pdpte, sizeof(vcpu->pdptrs));
-out:
- mutex_unlock(&vcpu->kvm->lock);
-
- return ret;
-}
-
-void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
-{
- if (cr0 & CR0_RESERVED_BITS) {
- printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
- cr0, vcpu->cr0);
- inject_gp(vcpu);
- return;
- }
-
- if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
- printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
- inject_gp(vcpu);
- return;
- }
-
- if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
- printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
- "and a clear PE flag\n");
- inject_gp(vcpu);
- return;
- }
-
- if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
-#ifdef CONFIG_X86_64
- if ((vcpu->shadow_efer & EFER_LME)) {
- int cs_db, cs_l;
-
- if (!is_pae(vcpu)) {
- printk(KERN_DEBUG "set_cr0: #GP, start paging "
- "in long mode while PAE is disabled\n");
- inject_gp(vcpu);
- return;
- }
- kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
- if (cs_l) {
- printk(KERN_DEBUG "set_cr0: #GP, start paging "
- "in long mode while CS.L == 1\n");
- inject_gp(vcpu);
- return;
-
- }
- } else
-#endif
- if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) {
- printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
- "reserved bits\n");
- inject_gp(vcpu);
- return;
- }
-
- }
-
- kvm_x86_ops->set_cr0(vcpu, cr0);
- vcpu->cr0 = cr0;
-
- mutex_lock(&vcpu->kvm->lock);
- kvm_mmu_reset_context(vcpu);
- mutex_unlock(&vcpu->kvm->lock);
- return;
-}
-EXPORT_SYMBOL_GPL(set_cr0);
-
-void lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
-{
- set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f));
-}
-EXPORT_SYMBOL_GPL(lmsw);
-
-void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
-{
- if (cr4 & CR4_RESERVED_BITS) {
- printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
- inject_gp(vcpu);
- return;
- }
-
- if (is_long_mode(vcpu)) {
- if (!(cr4 & X86_CR4_PAE)) {
- printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
- "in long mode\n");
- inject_gp(vcpu);
- return;
- }
- } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE)
- && !load_pdptrs(vcpu, vcpu->cr3)) {
- printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
- inject_gp(vcpu);
- return;
- }
-
- if (cr4 & X86_CR4_VMXE) {
- printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
- inject_gp(vcpu);
- return;
- }
- kvm_x86_ops->set_cr4(vcpu, cr4);
- vcpu->cr4 = cr4;
- mutex_lock(&vcpu->kvm->lock);
- kvm_mmu_reset_context(vcpu);
- mutex_unlock(&vcpu->kvm->lock);
-}
-EXPORT_SYMBOL_GPL(set_cr4);
-
-void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
-{
- if (is_long_mode(vcpu)) {
- if (cr3 & CR3_L_MODE_RESERVED_BITS) {
- printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
- inject_gp(vcpu);
- return;
- }
- } else {
- if (is_pae(vcpu)) {
- if (cr3 & CR3_PAE_RESERVED_BITS) {
- printk(KERN_DEBUG
- "set_cr3: #GP, reserved bits\n");
- inject_gp(vcpu);
- return;
- }
- if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
- printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
- "reserved bits\n");
- inject_gp(vcpu);
- return;
- }
- } else {
- if (cr3 & CR3_NONPAE_RESERVED_BITS) {
- printk(KERN_DEBUG
- "set_cr3: #GP, reserved bits\n");
- inject_gp(vcpu);
- return;
- }
- }
- }
-
- mutex_lock(&vcpu->kvm->lock);
- /*
- * Does the new cr3 value map to physical memory? (Note, we
- * catch an invalid cr3 even in real-mode, because it would
- * cause trouble later on when we turn on paging anyway.)
- *
- * A real CPU would silently accept an invalid cr3 and would
- * attempt to use it - with largely undefined (and often hard
- * to debug) behavior on the guest side.
- */
- if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
- inject_gp(vcpu);
- else {
- vcpu->cr3 = cr3;
- vcpu->mmu.new_cr3(vcpu);
- }
- mutex_unlock(&vcpu->kvm->lock);
-}
-EXPORT_SYMBOL_GPL(set_cr3);
-
-void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
-{
- if (cr8 & CR8_RESERVED_BITS) {
- printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
- inject_gp(vcpu);
- return;
- }
- if (irqchip_in_kernel(vcpu->kvm))
- kvm_lapic_set_tpr(vcpu, cr8);
- else
- vcpu->cr8 = cr8;
-}
-EXPORT_SYMBOL_GPL(set_cr8);
-
-unsigned long get_cr8(struct kvm_vcpu *vcpu)
-{
- if (irqchip_in_kernel(vcpu->kvm))
- return kvm_lapic_get_cr8(vcpu);
- else
- return vcpu->cr8;
-}
-EXPORT_SYMBOL_GPL(get_cr8);
-
-u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
-{
- if (irqchip_in_kernel(vcpu->kvm))
- return vcpu->apic_base;
- else
- return vcpu->apic_base;
-}
-EXPORT_SYMBOL_GPL(kvm_get_apic_base);
-
-void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
-{
- /* TODO: reserve bits check */
- if (irqchip_in_kernel(vcpu->kvm))
- kvm_lapic_set_base(vcpu, data);
- else
- vcpu->apic_base = data;
-}
-EXPORT_SYMBOL_GPL(kvm_set_apic_base);
-
-void fx_init(struct kvm_vcpu *vcpu)
-{
- unsigned after_mxcsr_mask;
-
- /* Initialize guest FPU by resetting ours and saving into guest's */
- preempt_disable();
- fx_save(&vcpu->host_fx_image);
- fpu_init();
- fx_save(&vcpu->guest_fx_image);
- fx_restore(&vcpu->host_fx_image);
- preempt_enable();
-
- vcpu->cr0 |= X86_CR0_ET;
- after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
- vcpu->guest_fx_image.mxcsr = 0x1f80;
- memset((void *)&vcpu->guest_fx_image + after_mxcsr_mask,
- 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
-}
-EXPORT_SYMBOL_GPL(fx_init);
-
-/*
- * Allocate some memory and give it an address in the guest physical address
- * space.
- *
- * Discontiguous memory is allowed, mostly for framebuffers.
- */
-static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
- struct kvm_memory_region *mem)
-{
- int r;
- gfn_t base_gfn;
- unsigned long npages;
- unsigned long i;
- struct kvm_memory_slot *memslot;
- struct kvm_memory_slot old, new;
-
- r = -EINVAL;
- /* General sanity checks */
- if (mem->memory_size & (PAGE_SIZE - 1))
- goto out;
- if (mem->guest_phys_addr & (PAGE_SIZE - 1))
- goto out;
- if (mem->slot >= KVM_MEMORY_SLOTS)
- goto out;
- if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr)
- goto out;
-
- memslot = &kvm->memslots[mem->slot];
- base_gfn = mem->guest_phys_addr >> PAGE_SHIFT;
- npages = mem->memory_size >> PAGE_SHIFT;
-
- if (!npages)
- mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES;
-
- mutex_lock(&kvm->lock);
-
- new = old = *memslot;
-
- new.base_gfn = base_gfn;
- new.npages = npages;
- new.flags = mem->flags;
-
- /* Disallow changing a memory slot's size. */
- r = -EINVAL;
- if (npages && old.npages && npages != old.npages)
- goto out_unlock;
-
- /* Check for overlaps */
- r = -EEXIST;
- for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
- struct kvm_memory_slot *s = &kvm->memslots[i];
-
- if (s == memslot)
- continue;
- if (!((base_gfn + npages <= s->base_gfn) ||
- (base_gfn >= s->base_gfn + s->npages)))
- goto out_unlock;
- }
-
- /* Deallocate if slot is being removed */
- if (!npages)
- new.phys_mem = NULL;
-
- /* Free page dirty bitmap if unneeded */
- if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES))
- new.dirty_bitmap = NULL;
-
- r = -ENOMEM;
-
- /* Allocate if a slot is being created */
- if (npages && !new.phys_mem) {
- new.phys_mem = vmalloc(npages * sizeof(struct page *));
-
- if (!new.phys_mem)
- goto out_unlock;
-
- memset(new.phys_mem, 0, npages * sizeof(struct page *));
- for (i = 0; i < npages; ++i) {
- new.phys_mem[i] = alloc_page(GFP_HIGHUSER
- | __GFP_ZERO);
- if (!new.phys_mem[i])
- goto out_unlock;
- set_page_private(new.phys_mem[i],0);
- }
- }
-
- /* Allocate page dirty bitmap if needed */
- if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
- unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8;
-
- new.dirty_bitmap = vmalloc(dirty_bytes);
- if (!new.dirty_bitmap)
- goto out_unlock;
- memset(new.dirty_bitmap, 0, dirty_bytes);
- }
-
- if (mem->slot >= kvm->nmemslots)
- kvm->nmemslots = mem->slot + 1;
-
- *memslot = new;
-
- kvm_mmu_slot_remove_write_access(kvm, mem->slot);
- kvm_flush_remote_tlbs(kvm);
-
- mutex_unlock(&kvm->lock);
-
- kvm_free_physmem_slot(&old, &new);
- return 0;
-
-out_unlock:
- mutex_unlock(&kvm->lock);
- kvm_free_physmem_slot(&new, &old);
-out:
- return r;
-}
-
-/*
- * Get (and clear) the dirty memory log for a memory slot.
- */
-static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
- struct kvm_dirty_log *log)
-{
- struct kvm_memory_slot *memslot;
- int r, i;
- int n;
- unsigned long any = 0;
-
- mutex_lock(&kvm->lock);
-
- 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;
-
- for (i = 0; !any && i < n/sizeof(long); ++i)
- any = memslot->dirty_bitmap[i];
-
- r = -EFAULT;
- if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
- goto out;
-
- /* If nothing is dirty, don't bother messing with page tables. */
- if (any) {
- kvm_mmu_slot_remove_write_access(kvm, log->slot);
- kvm_flush_remote_tlbs(kvm);
- memset(memslot->dirty_bitmap, 0, n);
- }
-
- r = 0;
-
-out:
- mutex_unlock(&kvm->lock);
- return r;
-}
-
-/*
- * Set a new alias region. Aliases map a portion of physical memory into
- * another portion. This is useful for memory windows, for example the PC
- * VGA region.
- */
-static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
- struct kvm_memory_alias *alias)
-{
- int r, n;
- struct kvm_mem_alias *p;
-
- r = -EINVAL;
- /* General sanity checks */
- if (alias->memory_size & (PAGE_SIZE - 1))
- goto out;
- if (alias->guest_phys_addr & (PAGE_SIZE - 1))
- goto out;
- if (alias->slot >= KVM_ALIAS_SLOTS)
- goto out;
- if (alias->guest_phys_addr + alias->memory_size
- < alias->guest_phys_addr)
- goto out;
- if (alias->target_phys_addr + alias->memory_size
- < alias->target_phys_addr)
- goto out;
-
- mutex_lock(&kvm->lock);
-
- p = &kvm->aliases[alias->slot];
- p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
- p->npages = alias->memory_size >> PAGE_SHIFT;
- p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
-
- for (n = KVM_ALIAS_SLOTS; n > 0; --n)
- if (kvm->aliases[n - 1].npages)
- break;
- kvm->naliases = n;
-
- kvm_mmu_zap_all(kvm);
-
- mutex_unlock(&kvm->lock);
-
- return 0;
-
-out:
- return r;
-}
-
-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_PIC_MASTER:
- memcpy (&chip->chip.pic,
- &pic_irqchip(kvm)->pics[0],
- sizeof(struct kvm_pic_state));
- break;
- case KVM_IRQCHIP_PIC_SLAVE:
- memcpy (&chip->chip.pic,
- &pic_irqchip(kvm)->pics[1],
- sizeof(struct kvm_pic_state));
- break;
- 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_PIC_MASTER:
- memcpy (&pic_irqchip(kvm)->pics[0],
- &chip->chip.pic,
- sizeof(struct kvm_pic_state));
- break;
- case KVM_IRQCHIP_PIC_SLAVE:
- memcpy (&pic_irqchip(kvm)->pics[1],
- &chip->chip.pic,
- sizeof(struct kvm_pic_state));
- break;
- case KVM_IRQCHIP_IOAPIC:
- memcpy (ioapic_irqchip(kvm),
- &chip->chip.ioapic,
- sizeof(struct kvm_ioapic_state));
- break;
- default:
- r = -EINVAL;
- break;
- }
- kvm_pic_update_irq(pic_irqchip(kvm));
- return r;
-}
-
-static gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
-{
- int i;
- struct kvm_mem_alias *alias;
-
- for (i = 0; i < kvm->naliases; ++i) {
- alias = &kvm->aliases[i];
- if (gfn >= alias->base_gfn
- && gfn < alias->base_gfn + alias->npages)
- return alias->target_gfn + gfn - alias->base_gfn;
- }
- return gfn;
-}
-
-static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
-{
- int i;
-
- for (i = 0; i < kvm->nmemslots; ++i) {
- struct kvm_memory_slot *memslot = &kvm->memslots[i];
-
- if (gfn >= memslot->base_gfn
- && gfn < memslot->base_gfn + memslot->npages)
- return memslot;
- }
- return NULL;
-}
-
-struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
-{
- gfn = unalias_gfn(kvm, gfn);
- return __gfn_to_memslot(kvm, gfn);
-}
-
-struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
-{
- struct kvm_memory_slot *slot;
-
- gfn = unalias_gfn(kvm, gfn);
- slot = __gfn_to_memslot(kvm, gfn);
- if (!slot)
- return NULL;
- return slot->phys_mem[gfn - slot->base_gfn];
-}
-EXPORT_SYMBOL_GPL(gfn_to_page);
-
-/* WARNING: Does not work on aliased pages. */
-void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
-{
- struct kvm_memory_slot *memslot;
-
- memslot = __gfn_to_memslot(kvm, gfn);
- if (memslot && memslot->dirty_bitmap) {
- unsigned long rel_gfn = gfn - memslot->base_gfn;
-
- /* avoid RMW */
- if (!test_bit(rel_gfn, memslot->dirty_bitmap))
- set_bit(rel_gfn, memslot->dirty_bitmap);
- }
-}
-
-int emulator_read_std(unsigned long addr,
- void *val,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
-{
- void *data = val;
-
- while (bytes) {
- gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
- unsigned offset = addr & (PAGE_SIZE-1);
- unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset);
- unsigned long pfn;
- struct page *page;
- void *page_virt;
-
- if (gpa == UNMAPPED_GVA)
- return X86EMUL_PROPAGATE_FAULT;
- pfn = gpa >> PAGE_SHIFT;
- page = gfn_to_page(vcpu->kvm, pfn);
- if (!page)
- return X86EMUL_UNHANDLEABLE;
- page_virt = kmap_atomic(page, KM_USER0);
-
- memcpy(data, page_virt + offset, tocopy);
-
- kunmap_atomic(page_virt, KM_USER0);
-
- bytes -= tocopy;
- data += tocopy;
- addr += tocopy;
- }
-
- return X86EMUL_CONTINUE;
-}
-EXPORT_SYMBOL_GPL(emulator_read_std);
-
-static int emulator_write_std(unsigned long addr,
- const void *val,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
-{
- pr_unimpl(vcpu, "emulator_write_std: addr %lx n %d\n", addr, bytes);
- return X86EMUL_UNHANDLEABLE;
-}
-
-/*
- * Only apic need an MMIO device hook, so shortcut now..
- */
-static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu,
- gpa_t addr)
-{
- struct kvm_io_device *dev;
-
- if (vcpu->apic) {
- dev = &vcpu->apic->dev;
- if (dev->in_range(dev, addr))
- return dev;
- }
- return NULL;
-}
-
-static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
- gpa_t addr)
-{
- struct kvm_io_device *dev;
-
- dev = vcpu_find_pervcpu_dev(vcpu, addr);
- if (dev == NULL)
- dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
- return dev;
-}
-
-static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu,
- gpa_t addr)
-{
- return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr);
-}
-
-static int emulator_read_emulated(unsigned long addr,
- void *val,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
-{
- struct kvm_io_device *mmio_dev;
- gpa_t gpa;
-
- if (vcpu->mmio_read_completed) {
- memcpy(val, vcpu->mmio_data, bytes);
- vcpu->mmio_read_completed = 0;
- return X86EMUL_CONTINUE;
- } else if (emulator_read_std(addr, val, bytes, vcpu)
- == X86EMUL_CONTINUE)
- return X86EMUL_CONTINUE;
-
- gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
- if (gpa == UNMAPPED_GVA)
- return X86EMUL_PROPAGATE_FAULT;
-
- /*
- * Is this MMIO handled locally?
- */
- mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
- if (mmio_dev) {
- kvm_iodevice_read(mmio_dev, gpa, bytes, val);
- return X86EMUL_CONTINUE;
- }
-
- vcpu->mmio_needed = 1;
- vcpu->mmio_phys_addr = gpa;
- vcpu->mmio_size = bytes;
- vcpu->mmio_is_write = 0;
-
- return X86EMUL_UNHANDLEABLE;
-}
-
-static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
- const void *val, int bytes)
-{
- struct page *page;
- void *virt;
-
- if (((gpa + bytes - 1) >> PAGE_SHIFT) != (gpa >> PAGE_SHIFT))
- return 0;
- page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
- if (!page)
- return 0;
- mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT);
- virt = kmap_atomic(page, KM_USER0);
- kvm_mmu_pte_write(vcpu, gpa, val, bytes);
- memcpy(virt + offset_in_page(gpa), val, bytes);
- kunmap_atomic(virt, KM_USER0);
- return 1;
-}
-
-static int emulator_write_emulated_onepage(unsigned long addr,
- const void *val,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
-{
- struct kvm_io_device *mmio_dev;
- gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
-
- if (gpa == UNMAPPED_GVA) {
- kvm_x86_ops->inject_page_fault(vcpu, addr, 2);
- return X86EMUL_PROPAGATE_FAULT;
- }
-
- if (emulator_write_phys(vcpu, gpa, val, bytes))
- return X86EMUL_CONTINUE;
-
- /*
- * Is this MMIO handled locally?
- */
- mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
- if (mmio_dev) {
- kvm_iodevice_write(mmio_dev, gpa, bytes, val);
- return X86EMUL_CONTINUE;
- }
-
- vcpu->mmio_needed = 1;
- vcpu->mmio_phys_addr = gpa;
- vcpu->mmio_size = bytes;
- vcpu->mmio_is_write = 1;
- memcpy(vcpu->mmio_data, val, bytes);
-
- return X86EMUL_CONTINUE;
-}
-
-int emulator_write_emulated(unsigned long addr,
- const void *val,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
-{
- /* Crossing a page boundary? */
- if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
- int rc, now;
-
- now = -addr & ~PAGE_MASK;
- rc = emulator_write_emulated_onepage(addr, val, now, vcpu);
- if (rc != X86EMUL_CONTINUE)
- return rc;
- addr += now;
- val += now;
- bytes -= now;
- }
- return emulator_write_emulated_onepage(addr, val, bytes, vcpu);
-}
-EXPORT_SYMBOL_GPL(emulator_write_emulated);
-
-static int emulator_cmpxchg_emulated(unsigned long addr,
- const void *old,
- const void *new,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
-{
- static int reported;
-
- if (!reported) {
- reported = 1;
- printk(KERN_WARNING "kvm: emulating exchange as write\n");
- }
- return emulator_write_emulated(addr, new, bytes, vcpu);
-}
-
-static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
-{
- return kvm_x86_ops->get_segment_base(vcpu, seg);
-}
-
-int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
-{
- return X86EMUL_CONTINUE;
-}
-
-int emulate_clts(struct kvm_vcpu *vcpu)
-{
- kvm_x86_ops->set_cr0(vcpu, vcpu->cr0 & ~X86_CR0_TS);
- return X86EMUL_CONTINUE;
-}
-
-int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr, unsigned long *dest)
-{
- struct kvm_vcpu *vcpu = ctxt->vcpu;
-
- switch (dr) {
- case 0 ... 3:
- *dest = kvm_x86_ops->get_dr(vcpu, dr);
- return X86EMUL_CONTINUE;
- default:
- pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr);
- return X86EMUL_UNHANDLEABLE;
- }
-}
-
-int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
-{
- unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
- int exception;
-
- kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
- if (exception) {
- /* FIXME: better handling */
- return X86EMUL_UNHANDLEABLE;
- }
- return X86EMUL_CONTINUE;
-}
-
-void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
-{
- static int reported;
- u8 opcodes[4];
- unsigned long rip = vcpu->rip;
- unsigned long rip_linear;
-
- rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
-
- if (reported)
- return;
-
- emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu);
-
- printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
- context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
- reported = 1;
-}
-EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
-
-struct x86_emulate_ops emulate_ops = {
- .read_std = emulator_read_std,
- .write_std = emulator_write_std,
- .read_emulated = emulator_read_emulated,
- .write_emulated = emulator_write_emulated,
- .cmpxchg_emulated = emulator_cmpxchg_emulated,
-};
-
-int emulate_instruction(struct kvm_vcpu *vcpu,
- struct kvm_run *run,
- unsigned long cr2,
- u16 error_code)
-{
- struct x86_emulate_ctxt emulate_ctxt;
- int r;
- int cs_db, cs_l;
-
- vcpu->mmio_fault_cr2 = cr2;
- kvm_x86_ops->cache_regs(vcpu);
-
- kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
-
- emulate_ctxt.vcpu = vcpu;
- emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
- emulate_ctxt.cr2 = cr2;
- emulate_ctxt.mode = (emulate_ctxt.eflags & X86_EFLAGS_VM)
- ? X86EMUL_MODE_REAL : cs_l
- ? X86EMUL_MODE_PROT64 : cs_db
- ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
-
- if (emulate_ctxt.mode == X86EMUL_MODE_PROT64) {
- emulate_ctxt.cs_base = 0;
- emulate_ctxt.ds_base = 0;
- emulate_ctxt.es_base = 0;
- emulate_ctxt.ss_base = 0;
- } else {
- emulate_ctxt.cs_base = get_segment_base(vcpu, VCPU_SREG_CS);
- emulate_ctxt.ds_base = get_segment_base(vcpu, VCPU_SREG_DS);
- emulate_ctxt.es_base = get_segment_base(vcpu, VCPU_SREG_ES);
- emulate_ctxt.ss_base = get_segment_base(vcpu, VCPU_SREG_SS);
- }
-
- emulate_ctxt.gs_base = get_segment_base(vcpu, VCPU_SREG_GS);
- emulate_ctxt.fs_base = get_segment_base(vcpu, VCPU_SREG_FS);
-
- vcpu->mmio_is_write = 0;
- vcpu->pio.string = 0;
- r = x86_emulate_memop(&emulate_ctxt, &emulate_ops);
- if (vcpu->pio.string)
- return EMULATE_DO_MMIO;
-
- if ((r || vcpu->mmio_is_write) && run) {
- run->exit_reason = KVM_EXIT_MMIO;
- run->mmio.phys_addr = vcpu->mmio_phys_addr;
- memcpy(run->mmio.data, vcpu->mmio_data, 8);
- run->mmio.len = vcpu->mmio_size;
- run->mmio.is_write = vcpu->mmio_is_write;
- }
-
- if (r) {
- if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
- return EMULATE_DONE;
- if (!vcpu->mmio_needed) {
- kvm_report_emulation_failure(vcpu, "mmio");
- return EMULATE_FAIL;
- }
- return EMULATE_DO_MMIO;
- }
-
- kvm_x86_ops->decache_regs(vcpu);
- kvm_x86_ops->set_rflags(vcpu, emulate_ctxt.eflags);
-
- if (vcpu->mmio_is_write) {
- vcpu->mmio_needed = 0;
- return EMULATE_DO_MMIO;
- }
-
- return EMULATE_DONE;
-}
-EXPORT_SYMBOL_GPL(emulate_instruction);
-
-/*
- * The vCPU has executed a HLT instruction with in-kernel mode enabled.
- */
-static void kvm_vcpu_block(struct kvm_vcpu *vcpu)
-{
- DECLARE_WAITQUEUE(wait, current);
-
- add_wait_queue(&vcpu->wq, &wait);
-
- /*
- * We will block until either an interrupt or a signal wakes us up
- */
- while (!kvm_cpu_has_interrupt(vcpu)
- && !signal_pending(current)
- && vcpu->mp_state != VCPU_MP_STATE_RUNNABLE
- && vcpu->mp_state != VCPU_MP_STATE_SIPI_RECEIVED) {
- set_current_state(TASK_INTERRUPTIBLE);
- vcpu_put(vcpu);
- schedule();
- vcpu_load(vcpu);
- }
-
- __set_current_state(TASK_RUNNING);
- remove_wait_queue(&vcpu->wq, &wait);
-}
-
-int kvm_emulate_halt(struct kvm_vcpu *vcpu)
-{
- ++vcpu->stat.halt_exits;
- if (irqchip_in_kernel(vcpu->kvm)) {
- vcpu->mp_state = VCPU_MP_STATE_HALTED;
- kvm_vcpu_block(vcpu);
- if (vcpu->mp_state != VCPU_MP_STATE_RUNNABLE)
- return -EINTR;
- return 1;
- } else {
- vcpu->run->exit_reason = KVM_EXIT_HLT;
- return 0;
- }
-}
-EXPORT_SYMBOL_GPL(kvm_emulate_halt);
-
-int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run)
-{
- unsigned long nr, a0, a1, a2, a3, a4, a5, ret;
-
- kvm_x86_ops->cache_regs(vcpu);
- ret = -KVM_EINVAL;
-#ifdef CONFIG_X86_64
- if (is_long_mode(vcpu)) {
- nr = vcpu->regs[VCPU_REGS_RAX];
- a0 = vcpu->regs[VCPU_REGS_RDI];
- a1 = vcpu->regs[VCPU_REGS_RSI];
- a2 = vcpu->regs[VCPU_REGS_RDX];
- a3 = vcpu->regs[VCPU_REGS_RCX];
- a4 = vcpu->regs[VCPU_REGS_R8];
- a5 = vcpu->regs[VCPU_REGS_R9];
- } else
-#endif
- {
- nr = vcpu->regs[VCPU_REGS_RBX] & -1u;
- a0 = vcpu->regs[VCPU_REGS_RAX] & -1u;
- a1 = vcpu->regs[VCPU_REGS_RCX] & -1u;
- a2 = vcpu->regs[VCPU_REGS_RDX] & -1u;
- a3 = vcpu->regs[VCPU_REGS_RSI] & -1u;
- a4 = vcpu->regs[VCPU_REGS_RDI] & -1u;
- a5 = vcpu->regs[VCPU_REGS_RBP] & -1u;
- }
- switch (nr) {
- default:
- run->hypercall.nr = nr;
- run->hypercall.args[0] = a0;
- run->hypercall.args[1] = a1;
- run->hypercall.args[2] = a2;
- run->hypercall.args[3] = a3;
- run->hypercall.args[4] = a4;
- run->hypercall.args[5] = a5;
- run->hypercall.ret = ret;
- run->hypercall.longmode = is_long_mode(vcpu);
- kvm_x86_ops->decache_regs(vcpu);
- return 0;
- }
- vcpu->regs[VCPU_REGS_RAX] = ret;
- kvm_x86_ops->decache_regs(vcpu);
- return 1;
-}
-EXPORT_SYMBOL_GPL(kvm_hypercall);
-
-static u64 mk_cr_64(u64 curr_cr, u32 new_val)
-{
- return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
-}
-
-void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
-{
- struct descriptor_table dt = { limit, base };
-
- kvm_x86_ops->set_gdt(vcpu, &dt);
-}
-
-void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
-{
- struct descriptor_table dt = { limit, base };
-
- kvm_x86_ops->set_idt(vcpu, &dt);
-}
-
-void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
- unsigned long *rflags)
-{
- lmsw(vcpu, msw);
- *rflags = kvm_x86_ops->get_rflags(vcpu);
-}
-
-unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
-{
- kvm_x86_ops->decache_cr4_guest_bits(vcpu);
- switch (cr) {
- case 0:
- return vcpu->cr0;
- case 2:
- return vcpu->cr2;
- case 3:
- return vcpu->cr3;
- case 4:
- return vcpu->cr4;
- default:
- vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
- return 0;
- }
-}
-
-void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
- unsigned long *rflags)
-{
- switch (cr) {
- case 0:
- set_cr0(vcpu, mk_cr_64(vcpu->cr0, val));
- *rflags = kvm_x86_ops->get_rflags(vcpu);
- break;
- case 2:
- vcpu->cr2 = val;
- break;
- case 3:
- set_cr3(vcpu, val);
- break;
- case 4:
- set_cr4(vcpu, mk_cr_64(vcpu->cr4, val));
- break;
- default:
- vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
- }
-}
-
-/*
- * Register the para guest with the host:
- */
-static int vcpu_register_para(struct kvm_vcpu *vcpu, gpa_t para_state_gpa)
-{
- struct kvm_vcpu_para_state *para_state;
- hpa_t para_state_hpa, hypercall_hpa;
- struct page *para_state_page;
- unsigned char *hypercall;
- gpa_t hypercall_gpa;
-
- printk(KERN_DEBUG "kvm: guest trying to enter paravirtual mode\n");
- printk(KERN_DEBUG ".... para_state_gpa: %08Lx\n", para_state_gpa);
-
- /*
- * Needs to be page aligned:
- */
- if (para_state_gpa != PAGE_ALIGN(para_state_gpa))
- goto err_gp;
-
- para_state_hpa = gpa_to_hpa(vcpu, para_state_gpa);
- printk(KERN_DEBUG ".... para_state_hpa: %08Lx\n", para_state_hpa);
- if (is_error_hpa(para_state_hpa))
- goto err_gp;
-
- mark_page_dirty(vcpu->kvm, para_state_gpa >> PAGE_SHIFT);
- para_state_page = pfn_to_page(para_state_hpa >> PAGE_SHIFT);
- para_state = kmap(para_state_page);
-
- printk(KERN_DEBUG ".... guest version: %d\n", para_state->guest_version);
- printk(KERN_DEBUG ".... size: %d\n", para_state->size);
-
- para_state->host_version = KVM_PARA_API_VERSION;
- /*
- * We cannot support guests that try to register themselves
- * with a newer API version than the host supports:
- */
- if (para_state->guest_version > KVM_PARA_API_VERSION) {
- para_state->ret = -KVM_EINVAL;
- goto err_kunmap_skip;
- }
-
- hypercall_gpa = para_state->hypercall_gpa;
- hypercall_hpa = gpa_to_hpa(vcpu, hypercall_gpa);
- printk(KERN_DEBUG ".... hypercall_hpa: %08Lx\n", hypercall_hpa);
- if (is_error_hpa(hypercall_hpa)) {
- para_state->ret = -KVM_EINVAL;
- goto err_kunmap_skip;
- }
-
- printk(KERN_DEBUG "kvm: para guest successfully registered.\n");
- vcpu->para_state_page = para_state_page;
- vcpu->para_state_gpa = para_state_gpa;
- vcpu->hypercall_gpa = hypercall_gpa;
-
- mark_page_dirty(vcpu->kvm, hypercall_gpa >> PAGE_SHIFT);
- hypercall = kmap_atomic(pfn_to_page(hypercall_hpa >> PAGE_SHIFT),
- KM_USER1) + (hypercall_hpa & ~PAGE_MASK);
- kvm_x86_ops->patch_hypercall(vcpu, hypercall);
- kunmap_atomic(hypercall, KM_USER1);
-
- para_state->ret = 0;
-err_kunmap_skip:
- kunmap(para_state_page);
- return 0;
-err_gp:
- return 1;
-}
-
-int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
-{
- u64 data;
-
- switch (msr) {
- case 0xc0010010: /* SYSCFG */
- case 0xc0010015: /* HWCR */
- case MSR_IA32_PLATFORM_ID:
- case MSR_IA32_P5_MC_ADDR:
- case MSR_IA32_P5_MC_TYPE:
- case MSR_IA32_MC0_CTL:
- case MSR_IA32_MCG_STATUS:
- case MSR_IA32_MCG_CAP:
- case MSR_IA32_MC0_MISC:
- case MSR_IA32_MC0_MISC+4:
- case MSR_IA32_MC0_MISC+8:
- case MSR_IA32_MC0_MISC+12:
- case MSR_IA32_MC0_MISC+16:
- case MSR_IA32_UCODE_REV:
- case MSR_IA32_PERF_STATUS:
- case MSR_IA32_EBL_CR_POWERON:
- /* MTRR registers */
- case 0xfe:
- case 0x200 ... 0x2ff:
- data = 0;
- break;
- case 0xcd: /* fsb frequency */
- data = 3;
- break;
- case MSR_IA32_APICBASE:
- data = kvm_get_apic_base(vcpu);
- break;
- case MSR_IA32_MISC_ENABLE:
- data = vcpu->ia32_misc_enable_msr;
- break;
-#ifdef CONFIG_X86_64
- case MSR_EFER:
- data = vcpu->shadow_efer;
- break;
-#endif
- default:
- pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
- return 1;
- }
- *pdata = data;
- return 0;
-}
-EXPORT_SYMBOL_GPL(kvm_get_msr_common);
-
-/*
- * Reads an msr value (of 'msr_index') into 'pdata'.
- * Returns 0 on success, non-0 otherwise.
- * Assumes vcpu_load() was already called.
- */
-int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
-{
- return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
-}
-
-#ifdef CONFIG_X86_64
-
-static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
-{
- if (efer & EFER_RESERVED_BITS) {
- printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
- efer);
- inject_gp(vcpu);
- return;
- }
-
- if (is_paging(vcpu)
- && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) {
- printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
- inject_gp(vcpu);
- return;
- }
-
- kvm_x86_ops->set_efer(vcpu, efer);
-
- efer &= ~EFER_LMA;
- efer |= vcpu->shadow_efer & EFER_LMA;
-
- vcpu->shadow_efer = efer;
-}
-
-#endif
-
-int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
-{
- switch (msr) {
-#ifdef CONFIG_X86_64
- case MSR_EFER:
- set_efer(vcpu, data);
- break;
-#endif
- case MSR_IA32_MC0_STATUS:
- pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
- __FUNCTION__, data);
- break;
- case MSR_IA32_MCG_STATUS:
- pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
- __FUNCTION__, data);
- break;
- case MSR_IA32_UCODE_REV:
- case MSR_IA32_UCODE_WRITE:
- case 0x200 ... 0x2ff: /* MTRRs */
- break;
- case MSR_IA32_APICBASE:
- kvm_set_apic_base(vcpu, data);
- break;
- case MSR_IA32_MISC_ENABLE:
- vcpu->ia32_misc_enable_msr = data;
- break;
- /*
- * This is the 'probe whether the host is KVM' logic:
- */
- case MSR_KVM_API_MAGIC:
- return vcpu_register_para(vcpu, data);
-
- default:
- pr_unimpl(vcpu, "unhandled wrmsr: 0x%x\n", msr);
- return 1;
- }
- return 0;
-}
-EXPORT_SYMBOL_GPL(kvm_set_msr_common);
-
-/*
- * Writes msr value into into the appropriate "register".
- * Returns 0 on success, non-0 otherwise.
- * Assumes vcpu_load() was already called.
- */
-int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
-{
- return kvm_x86_ops->set_msr(vcpu, msr_index, data);
-}
-
-void kvm_resched(struct kvm_vcpu *vcpu)
-{
- if (!need_resched())
- return;
- cond_resched();
-}
-EXPORT_SYMBOL_GPL(kvm_resched);
-
-void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
-{
- int i;
- u32 function;
- struct kvm_cpuid_entry *e, *best;
-
- kvm_x86_ops->cache_regs(vcpu);
- function = vcpu->regs[VCPU_REGS_RAX];
- vcpu->regs[VCPU_REGS_RAX] = 0;
- vcpu->regs[VCPU_REGS_RBX] = 0;
- vcpu->regs[VCPU_REGS_RCX] = 0;
- vcpu->regs[VCPU_REGS_RDX] = 0;
- best = NULL;
- for (i = 0; i < vcpu->cpuid_nent; ++i) {
- e = &vcpu->cpuid_entries[i];
- if (e->function == function) {
- best = e;
- break;
- }
- /*
- * Both basic or both extended?
- */
- if (((e->function ^ function) & 0x80000000) == 0)
- if (!best || e->function > best->function)
- best = e;
- }
- if (best) {
- vcpu->regs[VCPU_REGS_RAX] = best->eax;
- vcpu->regs[VCPU_REGS_RBX] = best->ebx;
- vcpu->regs[VCPU_REGS_RCX] = best->ecx;
- vcpu->regs[VCPU_REGS_RDX] = best->edx;
- }
- kvm_x86_ops->decache_regs(vcpu);
- kvm_x86_ops->skip_emulated_instruction(vcpu);
-}
-EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
-
-static int pio_copy_data(struct kvm_vcpu *vcpu)
-{
- void *p = vcpu->pio_data;
- void *q;
- unsigned bytes;
- int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1;
-
- q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE,
- PAGE_KERNEL);
- if (!q) {
- free_pio_guest_pages(vcpu);
- return -ENOMEM;
- }
- q += vcpu->pio.guest_page_offset;
- bytes = vcpu->pio.size * vcpu->pio.cur_count;
- if (vcpu->pio.in)
- memcpy(q, p, bytes);
- else
- memcpy(p, q, bytes);
- q -= vcpu->pio.guest_page_offset;
- vunmap(q);
- free_pio_guest_pages(vcpu);
- return 0;
-}
-
-static int complete_pio(struct kvm_vcpu *vcpu)
-{
- struct kvm_pio_request *io = &vcpu->pio;
- long delta;
- int r;
-
- kvm_x86_ops->cache_regs(vcpu);
-
- if (!io->string) {
- if (io->in)
- memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data,
- io->size);
- } else {
- if (io->in) {
- r = pio_copy_data(vcpu);
- if (r) {
- kvm_x86_ops->cache_regs(vcpu);
- return r;
- }
- }
-
- delta = 1;
- if (io->rep) {
- delta *= io->cur_count;
- /*
- * The size of the register should really depend on
- * current address size.
- */
- vcpu->regs[VCPU_REGS_RCX] -= delta;
- }
- if (io->down)
- delta = -delta;
- delta *= io->size;
- if (io->in)
- vcpu->regs[VCPU_REGS_RDI] += delta;
- else
- vcpu->regs[VCPU_REGS_RSI] += delta;
- }
-
- kvm_x86_ops->decache_regs(vcpu);
-
- io->count -= io->cur_count;
- io->cur_count = 0;
-
- return 0;
-}
-
-static void kernel_pio(struct kvm_io_device *pio_dev,
- struct kvm_vcpu *vcpu,
- void *pd)
-{
- /* TODO: String I/O for in kernel device */
-
- mutex_lock(&vcpu->kvm->lock);
- if (vcpu->pio.in)
- kvm_iodevice_read(pio_dev, vcpu->pio.port,
- vcpu->pio.size,
- pd);
- else
- kvm_iodevice_write(pio_dev, vcpu->pio.port,
- vcpu->pio.size,
- pd);
- mutex_unlock(&vcpu->kvm->lock);
-}
-
-static void pio_string_write(struct kvm_io_device *pio_dev,
- struct kvm_vcpu *vcpu)
-{
- struct kvm_pio_request *io = &vcpu->pio;
- void *pd = vcpu->pio_data;
- int i;
-
- mutex_lock(&vcpu->kvm->lock);
- for (i = 0; i < io->cur_count; i++) {
- kvm_iodevice_write(pio_dev, io->port,
- io->size,
- pd);
- pd += io->size;
- }
- mutex_unlock(&vcpu->kvm->lock);
-}
-
-int kvm_emulate_pio (struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
- int size, unsigned port)
-{
- struct kvm_io_device *pio_dev;
-
- vcpu->run->exit_reason = KVM_EXIT_IO;
- vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
- vcpu->run->io.size = vcpu->pio.size = size;
- vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
- vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = 1;
- vcpu->run->io.port = vcpu->pio.port = port;
- vcpu->pio.in = in;
- vcpu->pio.string = 0;
- vcpu->pio.down = 0;
- vcpu->pio.guest_page_offset = 0;
- vcpu->pio.rep = 0;
-
- kvm_x86_ops->cache_regs(vcpu);
- memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4);
- kvm_x86_ops->decache_regs(vcpu);
-
- kvm_x86_ops->skip_emulated_instruction(vcpu);
-
- pio_dev = vcpu_find_pio_dev(vcpu, port);
- if (pio_dev) {
- kernel_pio(pio_dev, vcpu, vcpu->pio_data);
- complete_pio(vcpu);
- return 1;
- }
- return 0;
-}
-EXPORT_SYMBOL_GPL(kvm_emulate_pio);
-
-int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
- int size, unsigned long count, int down,
- gva_t address, int rep, unsigned port)
-{
- unsigned now, in_page;
- int i, ret = 0;
- int nr_pages = 1;
- struct page *page;
- struct kvm_io_device *pio_dev;
-
- vcpu->run->exit_reason = KVM_EXIT_IO;
- vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
- vcpu->run->io.size = vcpu->pio.size = size;
- vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
- vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = count;
- vcpu->run->io.port = vcpu->pio.port = port;
- vcpu->pio.in = in;
- vcpu->pio.string = 1;
- vcpu->pio.down = down;
- vcpu->pio.guest_page_offset = offset_in_page(address);
- vcpu->pio.rep = rep;
-
- if (!count) {
- kvm_x86_ops->skip_emulated_instruction(vcpu);
- return 1;
- }
-
- if (!down)
- in_page = PAGE_SIZE - offset_in_page(address);
- else
- in_page = offset_in_page(address) + size;
- now = min(count, (unsigned long)in_page / size);
- if (!now) {
- /*
- * String I/O straddles page boundary. Pin two guest pages
- * so that we satisfy atomicity constraints. Do just one
- * transaction to avoid complexity.
- */
- nr_pages = 2;
- now = 1;
- }
- if (down) {
- /*
- * String I/O in reverse. Yuck. Kill the guest, fix later.
- */
- pr_unimpl(vcpu, "guest string pio down\n");
- inject_gp(vcpu);
- return 1;
- }
- vcpu->run->io.count = now;
- vcpu->pio.cur_count = now;
-
- if (vcpu->pio.cur_count == vcpu->pio.count)
- kvm_x86_ops->skip_emulated_instruction(vcpu);
-
- for (i = 0; i < nr_pages; ++i) {
- mutex_lock(&vcpu->kvm->lock);
- page = gva_to_page(vcpu, address + i * PAGE_SIZE);
- if (page)
- get_page(page);
- vcpu->pio.guest_pages[i] = page;
- mutex_unlock(&vcpu->kvm->lock);
- if (!page) {
- inject_gp(vcpu);
- free_pio_guest_pages(vcpu);
- return 1;
- }
- }
-
- pio_dev = vcpu_find_pio_dev(vcpu, port);
- if (!vcpu->pio.in) {
- /* string PIO write */
- ret = pio_copy_data(vcpu);
- if (ret >= 0 && pio_dev) {
- pio_string_write(pio_dev, vcpu);
- complete_pio(vcpu);
- if (vcpu->pio.count == 0)
- ret = 1;
- }
- } else if (pio_dev)
- pr_unimpl(vcpu, "no string pio read support yet, "
- "port %x size %d count %ld\n",
- port, size, count);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
-
-/*
- * Check if userspace requested an interrupt window, and that the
- * interrupt window is open.
- *
- * No need to exit to userspace if we already have an interrupt queued.
- */
-static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
- struct kvm_run *kvm_run)
-{
- return (!vcpu->irq_summary &&
- kvm_run->request_interrupt_window &&
- vcpu->interrupt_window_open &&
- (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
-}
-
-static void post_kvm_run_save(struct kvm_vcpu *vcpu,
- struct kvm_run *kvm_run)
-{
- kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
- kvm_run->cr8 = get_cr8(vcpu);
- kvm_run->apic_base = kvm_get_apic_base(vcpu);
- if (irqchip_in_kernel(vcpu->kvm))
- kvm_run->ready_for_interrupt_injection = 1;
- else
- kvm_run->ready_for_interrupt_injection =
- (vcpu->interrupt_window_open &&
- vcpu->irq_summary == 0);
-}
-
-static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- int r;
-
- if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
- printk("vcpu %d received sipi with vector # %x\n",
- vcpu->vcpu_id, vcpu->sipi_vector);
- kvm_lapic_reset(vcpu);
- kvm_x86_ops->vcpu_reset(vcpu);
- vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
- }
-
-preempted:
- if (vcpu->guest_debug.enabled)
- kvm_x86_ops->guest_debug_pre(vcpu);
-
-again:
- r = kvm_mmu_reload(vcpu);
- if (unlikely(r))
- goto out;
-
- preempt_disable();
-
- kvm_x86_ops->prepare_guest_switch(vcpu);
- kvm_load_guest_fpu(vcpu);
-
- local_irq_disable();
-
- if (signal_pending(current)) {
- local_irq_enable();
- preempt_enable();
- r = -EINTR;
- kvm_run->exit_reason = KVM_EXIT_INTR;
- ++vcpu->stat.signal_exits;
- goto out;
- }
-
- if (irqchip_in_kernel(vcpu->kvm))
- kvm_x86_ops->inject_pending_irq(vcpu);
- else if (!vcpu->mmio_read_completed)
- kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
-
- vcpu->guest_mode = 1;
- kvm_guest_enter();
-
- if (vcpu->requests)
- if (test_and_clear_bit(KVM_TLB_FLUSH, &vcpu->requests))
- kvm_x86_ops->tlb_flush(vcpu);
-
- kvm_x86_ops->run(vcpu, kvm_run);
-
- vcpu->guest_mode = 0;
- local_irq_enable();
-
- ++vcpu->stat.exits;
-
- /*
- * We must have an instruction between local_irq_enable() and
- * kvm_guest_exit(), so the timer interrupt isn't delayed by
- * the interrupt shadow. The stat.exits increment will do nicely.
- * But we need to prevent reordering, hence this barrier():
- */
- barrier();
-
- kvm_guest_exit();
-
- preempt_enable();
-
- /*
- * Profile KVM exit RIPs:
- */
- if (unlikely(prof_on == KVM_PROFILING)) {
- kvm_x86_ops->cache_regs(vcpu);
- profile_hit(KVM_PROFILING, (void *)vcpu->rip);
- }
-
- r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
-
- if (r > 0) {
- if (dm_request_for_irq_injection(vcpu, kvm_run)) {
- r = -EINTR;
- kvm_run->exit_reason = KVM_EXIT_INTR;
- ++vcpu->stat.request_irq_exits;
- goto out;
- }
- if (!need_resched()) {
- ++vcpu->stat.light_exits;
- goto again;
- }
- }
-
-out:
- if (r > 0) {
- kvm_resched(vcpu);
- goto preempted;
- }
-
- post_kvm_run_save(vcpu, kvm_run);
-
- return r;
-}
-
-
-static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- int r;
- sigset_t sigsaved;
-
- vcpu_load(vcpu);
-
- if (unlikely(vcpu->mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
- kvm_vcpu_block(vcpu);
- vcpu_put(vcpu);
- return -EAGAIN;
- }
-
- if (vcpu->sigset_active)
- sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
-
- /* re-sync apic's tpr */
- if (!irqchip_in_kernel(vcpu->kvm))
- set_cr8(vcpu, kvm_run->cr8);
-
- if (vcpu->pio.cur_count) {
- r = complete_pio(vcpu);
- if (r)
- goto out;
- }
-
- if (vcpu->mmio_needed) {
- memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
- vcpu->mmio_read_completed = 1;
- vcpu->mmio_needed = 0;
- r = emulate_instruction(vcpu, kvm_run,
- vcpu->mmio_fault_cr2, 0);
- if (r == EMULATE_DO_MMIO) {
- /*
- * Read-modify-write. Back to userspace.
- */
- r = 0;
- goto out;
- }
- }
-
- if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
- kvm_x86_ops->cache_regs(vcpu);
- vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
- kvm_x86_ops->decache_regs(vcpu);
- }
-
- r = __vcpu_run(vcpu, kvm_run);
-
-out:
- if (vcpu->sigset_active)
- sigprocmask(SIG_SETMASK, &sigsaved, NULL);
-
- vcpu_put(vcpu);
- return r;
-}
-
-static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu,
- struct kvm_regs *regs)
-{
- vcpu_load(vcpu);
-
- kvm_x86_ops->cache_regs(vcpu);
-
- regs->rax = vcpu->regs[VCPU_REGS_RAX];
- regs->rbx = vcpu->regs[VCPU_REGS_RBX];
- regs->rcx = vcpu->regs[VCPU_REGS_RCX];
- regs->rdx = vcpu->regs[VCPU_REGS_RDX];
- regs->rsi = vcpu->regs[VCPU_REGS_RSI];
- regs->rdi = vcpu->regs[VCPU_REGS_RDI];
- regs->rsp = vcpu->regs[VCPU_REGS_RSP];
- regs->rbp = vcpu->regs[VCPU_REGS_RBP];
-#ifdef CONFIG_X86_64
- regs->r8 = vcpu->regs[VCPU_REGS_R8];
- regs->r9 = vcpu->regs[VCPU_REGS_R9];
- regs->r10 = vcpu->regs[VCPU_REGS_R10];
- regs->r11 = vcpu->regs[VCPU_REGS_R11];
- regs->r12 = vcpu->regs[VCPU_REGS_R12];
- regs->r13 = vcpu->regs[VCPU_REGS_R13];
- regs->r14 = vcpu->regs[VCPU_REGS_R14];
- regs->r15 = vcpu->regs[VCPU_REGS_R15];
-#endif
-
- regs->rip = vcpu->rip;
- regs->rflags = kvm_x86_ops->get_rflags(vcpu);
-
- /*
- * Don't leak debug flags in case they were set for guest debugging
- */
- if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
- regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
-
- vcpu_put(vcpu);
-
- return 0;
-}
-
-static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu,
- struct kvm_regs *regs)
-{
- vcpu_load(vcpu);
-
- vcpu->regs[VCPU_REGS_RAX] = regs->rax;
- vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
- vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
- vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
- vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
- vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
- vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
- vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
-#ifdef CONFIG_X86_64
- vcpu->regs[VCPU_REGS_R8] = regs->r8;
- vcpu->regs[VCPU_REGS_R9] = regs->r9;
- vcpu->regs[VCPU_REGS_R10] = regs->r10;
- vcpu->regs[VCPU_REGS_R11] = regs->r11;
- vcpu->regs[VCPU_REGS_R12] = regs->r12;
- vcpu->regs[VCPU_REGS_R13] = regs->r13;
- vcpu->regs[VCPU_REGS_R14] = regs->r14;
- vcpu->regs[VCPU_REGS_R15] = regs->r15;
-#endif
-
- vcpu->rip = regs->rip;
- kvm_x86_ops->set_rflags(vcpu, regs->rflags);
-
- kvm_x86_ops->decache_regs(vcpu);
-
- vcpu_put(vcpu);
-
- return 0;
-}
-
-static void get_segment(struct kvm_vcpu *vcpu,
- struct kvm_segment *var, int seg)
-{
- return kvm_x86_ops->get_segment(vcpu, var, seg);
-}
-
-static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
- struct kvm_sregs *sregs)
-{
- struct descriptor_table dt;
- int pending_vec;
-
- vcpu_load(vcpu);
-
- get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
- get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
- get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
- get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
- get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
- get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
-
- get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
- get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
-
- kvm_x86_ops->get_idt(vcpu, &dt);
- sregs->idt.limit = dt.limit;
- sregs->idt.base = dt.base;
- kvm_x86_ops->get_gdt(vcpu, &dt);
- sregs->gdt.limit = dt.limit;
- sregs->gdt.base = dt.base;
-
- kvm_x86_ops->decache_cr4_guest_bits(vcpu);
- sregs->cr0 = vcpu->cr0;
- sregs->cr2 = vcpu->cr2;
- sregs->cr3 = vcpu->cr3;
- sregs->cr4 = vcpu->cr4;
- sregs->cr8 = get_cr8(vcpu);
- sregs->efer = vcpu->shadow_efer;
- sregs->apic_base = kvm_get_apic_base(vcpu);
-
- if (irqchip_in_kernel(vcpu->kvm)) {
- memset(sregs->interrupt_bitmap, 0,
- sizeof sregs->interrupt_bitmap);
- pending_vec = kvm_x86_ops->get_irq(vcpu);
- if (pending_vec >= 0)
- set_bit(pending_vec, (unsigned long *)sregs->interrupt_bitmap);
- } else
- memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
- sizeof sregs->interrupt_bitmap);
-
- vcpu_put(vcpu);
-
- return 0;
-}
-
-static void set_segment(struct kvm_vcpu *vcpu,
- struct kvm_segment *var, int seg)
-{
- return kvm_x86_ops->set_segment(vcpu, var, seg);
-}
-
-static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
- struct kvm_sregs *sregs)
-{
- int mmu_reset_needed = 0;
- int i, pending_vec, max_bits;
- struct descriptor_table dt;
-
- vcpu_load(vcpu);
-
- dt.limit = sregs->idt.limit;
- dt.base = sregs->idt.base;
- kvm_x86_ops->set_idt(vcpu, &dt);
- dt.limit = sregs->gdt.limit;
- dt.base = sregs->gdt.base;
- kvm_x86_ops->set_gdt(vcpu, &dt);
-
- vcpu->cr2 = sregs->cr2;
- mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
- vcpu->cr3 = sregs->cr3;
-
- set_cr8(vcpu, sregs->cr8);
-
- mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
-#ifdef CONFIG_X86_64
- kvm_x86_ops->set_efer(vcpu, sregs->efer);
-#endif
- kvm_set_apic_base(vcpu, sregs->apic_base);
-
- kvm_x86_ops->decache_cr4_guest_bits(vcpu);
-
- mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
- vcpu->cr0 = sregs->cr0;
- kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
-
- mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
- kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
- if (!is_long_mode(vcpu) && is_pae(vcpu))
- load_pdptrs(vcpu, vcpu->cr3);
-
- if (mmu_reset_needed)
- kvm_mmu_reset_context(vcpu);
-
- if (!irqchip_in_kernel(vcpu->kvm)) {
- memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
- sizeof vcpu->irq_pending);
- vcpu->irq_summary = 0;
- for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
- if (vcpu->irq_pending[i])
- __set_bit(i, &vcpu->irq_summary);
- } else {
- max_bits = (sizeof sregs->interrupt_bitmap) << 3;
- pending_vec = find_first_bit(
- (const unsigned long *)sregs->interrupt_bitmap,
- max_bits);
- /* Only pending external irq is handled here */
- if (pending_vec < max_bits) {
- kvm_x86_ops->set_irq(vcpu, pending_vec);
- printk("Set back pending irq %d\n", pending_vec);
- }
- }
-
- set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
- set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
- set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
- set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
- set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
- set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
-
- set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
- set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
-
- vcpu_put(vcpu);
-
- return 0;
-}
-
-void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
-{
- struct kvm_segment cs;
-
- get_segment(vcpu, &cs, VCPU_SREG_CS);
- *db = cs.db;
- *l = cs.l;
-}
-EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
-
-/*
- * List of msr numbers which we expose to userspace through KVM_GET_MSRS
- * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
- *
- * This list is modified at module load time to reflect the
- * capabilities of the host cpu.
- */
-static u32 msrs_to_save[] = {
- MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
- MSR_K6_STAR,
-#ifdef CONFIG_X86_64
- MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
-#endif
- MSR_IA32_TIME_STAMP_COUNTER,
-};
-
-static unsigned num_msrs_to_save;
-
-static u32 emulated_msrs[] = {
- MSR_IA32_MISC_ENABLE,
-};
-
-static __init void kvm_init_msr_list(void)
-{
- u32 dummy[2];
- unsigned i, j;
-
- for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) {
- if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
- continue;
- if (j < i)
- msrs_to_save[j] = msrs_to_save[i];
- j++;
- }
- num_msrs_to_save = j;
-}
-
-/*
- * Adapt set_msr() to msr_io()'s calling convention
- */
-static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
-{
- return kvm_set_msr(vcpu, index, *data);
-}
-
-/*
- * Read or write a bunch of msrs. All parameters are kernel addresses.
- *
- * @return number of msrs set successfully.
- */
-static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
- struct kvm_msr_entry *entries,
- int (*do_msr)(struct kvm_vcpu *vcpu,
- unsigned index, u64 *data))
-{
- int i;
-
- vcpu_load(vcpu);
-
- for (i = 0; i < msrs->nmsrs; ++i)
- if (do_msr(vcpu, entries[i].index, &entries[i].data))
- break;
-
- vcpu_put(vcpu);
-
- return i;
-}
-
-/*
- * Read or write a bunch of msrs. Parameters are user addresses.
- *
- * @return number of msrs set successfully.
- */
-static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
- int (*do_msr)(struct kvm_vcpu *vcpu,
- unsigned index, u64 *data),
- int writeback)
-{
- struct kvm_msrs msrs;
- struct kvm_msr_entry *entries;
- int r, n;
- unsigned size;
-
- r = -EFAULT;
- if (copy_from_user(&msrs, user_msrs, sizeof msrs))
- goto out;
-
- r = -E2BIG;
- if (msrs.nmsrs >= MAX_IO_MSRS)
- goto out;
-
- r = -ENOMEM;
- size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
- entries = vmalloc(size);
- if (!entries)
- goto out;
-
- r = -EFAULT;
- if (copy_from_user(entries, user_msrs->entries, size))
- goto out_free;
-
- r = n = __msr_io(vcpu, &msrs, entries, do_msr);
- if (r < 0)
- goto out_free;
-
- r = -EFAULT;
- if (writeback && copy_to_user(user_msrs->entries, entries, size))
- goto out_free;
-
- r = n;
-
-out_free:
- vfree(entries);
-out:
- return r;
-}
-
-/*
- * Translate a guest virtual address to a guest physical address.
- */
-static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
- struct kvm_translation *tr)
-{
- unsigned long vaddr = tr->linear_address;
- gpa_t gpa;
-
- vcpu_load(vcpu);
- mutex_lock(&vcpu->kvm->lock);
- gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr);
- tr->physical_address = gpa;
- tr->valid = gpa != UNMAPPED_GVA;
- tr->writeable = 1;
- tr->usermode = 0;
- mutex_unlock(&vcpu->kvm->lock);
- vcpu_put(vcpu);
-
- return 0;
-}
-
-static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
- struct kvm_interrupt *irq)
-{
- if (irq->irq < 0 || irq->irq >= 256)
- return -EINVAL;
- if (irqchip_in_kernel(vcpu->kvm))
- return -ENXIO;
- vcpu_load(vcpu);
-
- set_bit(irq->irq, vcpu->irq_pending);
- set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary);
-
- vcpu_put(vcpu);
-
- return 0;
-}
-
-static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
- struct kvm_debug_guest *dbg)
-{
- int r;
-
- vcpu_load(vcpu);
-
- r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
-
- vcpu_put(vcpu);
-
- return r;
-}
-
-static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma,
- unsigned long address,
- int *type)
-{
- struct kvm_vcpu *vcpu = vma->vm_file->private_data;
- unsigned long pgoff;
- struct page *page;
-
- pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
- if (pgoff == 0)
- page = virt_to_page(vcpu->run);
- else if (pgoff == KVM_PIO_PAGE_OFFSET)
- page = virt_to_page(vcpu->pio_data);
- else
- return NOPAGE_SIGBUS;
- get_page(page);
- if (type != NULL)
- *type = VM_FAULT_MINOR;
-
- return page;
-}
-
-static struct vm_operations_struct kvm_vcpu_vm_ops = {
- .nopage = kvm_vcpu_nopage,
-};
-
-static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma)
-{
- vma->vm_ops = &kvm_vcpu_vm_ops;
- return 0;
-}
-
-static int kvm_vcpu_release(struct inode *inode, struct file *filp)
-{
- struct kvm_vcpu *vcpu = filp->private_data;
-
- fput(vcpu->kvm->filp);
- return 0;
-}
-
-static struct file_operations kvm_vcpu_fops = {
- .release = kvm_vcpu_release,
- .unlocked_ioctl = kvm_vcpu_ioctl,
- .compat_ioctl = kvm_vcpu_ioctl,
- .mmap = kvm_vcpu_mmap,
-};
-
-/*
- * Allocates an inode for the vcpu.
- */
-static int create_vcpu_fd(struct kvm_vcpu *vcpu)
-{
- int fd, r;
- struct inode *inode;
- struct file *file;
-
- r = anon_inode_getfd(&fd, &inode, &file,
- "kvm-vcpu", &kvm_vcpu_fops, vcpu);
- if (r)
- return r;
- atomic_inc(&vcpu->kvm->filp->f_count);
- return fd;
-}
-
-/*
- * Creates some virtual cpus. Good luck creating more than one.
- */
-static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
-{
- int r;
- struct kvm_vcpu *vcpu;
-
- if (!valid_vcpu(n))
- return -EINVAL;
-
- vcpu = kvm_x86_ops->vcpu_create(kvm, n);
- if (IS_ERR(vcpu))
- return PTR_ERR(vcpu);
-
- preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops);
-
- /* We do fxsave: this must be aligned. */
- BUG_ON((unsigned long)&vcpu->host_fx_image & 0xF);
-
- vcpu_load(vcpu);
- r = kvm_mmu_setup(vcpu);
- vcpu_put(vcpu);
- if (r < 0)
- goto free_vcpu;
-
- mutex_lock(&kvm->lock);
- if (kvm->vcpus[n]) {
- r = -EEXIST;
- mutex_unlock(&kvm->lock);
- goto mmu_unload;
- }
- kvm->vcpus[n] = vcpu;
- mutex_unlock(&kvm->lock);
-
- /* Now it's all set up, let userspace reach it */
- r = create_vcpu_fd(vcpu);
- if (r < 0)
- goto unlink;
- return r;
-
-unlink:
- mutex_lock(&kvm->lock);
- kvm->vcpus[n] = NULL;
- mutex_unlock(&kvm->lock);
-
-mmu_unload:
- vcpu_load(vcpu);
- kvm_mmu_unload(vcpu);
- vcpu_put(vcpu);
-
-free_vcpu:
- kvm_x86_ops->vcpu_free(vcpu);
- return r;
-}
-
-static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
-{
- u64 efer;
- int i;
- struct kvm_cpuid_entry *e, *entry;
-
- rdmsrl(MSR_EFER, efer);
- entry = NULL;
- for (i = 0; i < vcpu->cpuid_nent; ++i) {
- e = &vcpu->cpuid_entries[i];
- if (e->function == 0x80000001) {
- entry = e;
- break;
- }
- }
- if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) {
- entry->edx &= ~(1 << 20);
- printk(KERN_INFO "kvm: guest NX capability removed\n");
- }
-}
-
-static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
- struct kvm_cpuid *cpuid,
- struct kvm_cpuid_entry __user *entries)
-{
- int r;
-
- r = -E2BIG;
- if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
- goto out;
- r = -EFAULT;
- if (copy_from_user(&vcpu->cpuid_entries, entries,
- cpuid->nent * sizeof(struct kvm_cpuid_entry)))
- goto out;
- vcpu->cpuid_nent = cpuid->nent;
- cpuid_fix_nx_cap(vcpu);
- return 0;
-
-out:
- return r;
-}
-
-static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset)
-{
- if (sigset) {
- sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP));
- vcpu->sigset_active = 1;
- vcpu->sigset = *sigset;
- } else
- vcpu->sigset_active = 0;
- return 0;
-}
-
-/*
- * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
- * we have asm/x86/processor.h
- */
-struct fxsave {
- u16 cwd;
- u16 swd;
- u16 twd;
- u16 fop;
- u64 rip;
- u64 rdp;
- u32 mxcsr;
- u32 mxcsr_mask;
- u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
-#ifdef CONFIG_X86_64
- u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
-#else
- u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
-#endif
-};
-
-static int kvm_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
-{
- struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
-
- vcpu_load(vcpu);
-
- memcpy(fpu->fpr, fxsave->st_space, 128);
- fpu->fcw = fxsave->cwd;
- fpu->fsw = fxsave->swd;
- fpu->ftwx = fxsave->twd;
- fpu->last_opcode = fxsave->fop;
- fpu->last_ip = fxsave->rip;
- fpu->last_dp = fxsave->rdp;
- memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
-
- vcpu_put(vcpu);
-
- return 0;
-}
-
-static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
-{
- struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
-
- vcpu_load(vcpu);
-
- memcpy(fxsave->st_space, fpu->fpr, 128);
- fxsave->cwd = fpu->fcw;
- fxsave->swd = fpu->fsw;
- fxsave->twd = fpu->ftwx;
- fxsave->fop = fpu->last_opcode;
- fxsave->rip = fpu->last_ip;
- fxsave->rdp = fpu->last_dp;
- memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
-
- vcpu_put(vcpu);
-
- return 0;
-}
-
-static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
- struct kvm_lapic_state *s)
-{
- vcpu_load(vcpu);
- memcpy(s->regs, vcpu->apic->regs, sizeof *s);
- vcpu_put(vcpu);
-
- return 0;
-}
-
-static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
- struct kvm_lapic_state *s)
-{
- vcpu_load(vcpu);
- memcpy(vcpu->apic->regs, s->regs, sizeof *s);
- kvm_apic_post_state_restore(vcpu);
- vcpu_put(vcpu);
-
- return 0;
-}
-
-static long kvm_vcpu_ioctl(struct file *filp,
- unsigned int ioctl, unsigned long arg)
-{
- struct kvm_vcpu *vcpu = filp->private_data;
- void __user *argp = (void __user *)arg;
- int r = -EINVAL;
-
- switch (ioctl) {
- case KVM_RUN:
- r = -EINVAL;
- if (arg)
- goto out;
- r = kvm_vcpu_ioctl_run(vcpu, vcpu->run);
- break;
- case KVM_GET_REGS: {
- struct kvm_regs kvm_regs;
-
- memset(&kvm_regs, 0, sizeof kvm_regs);
- r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
- if (r)
- goto out;
- r = -EFAULT;
- if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs))
- goto out;
- r = 0;
- break;
- }
- case KVM_SET_REGS: {
- struct kvm_regs kvm_regs;
-
- r = -EFAULT;
- if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs))
- goto out;
- r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
- if (r)
- goto out;
- r = 0;
- break;
- }
- case KVM_GET_SREGS: {
- struct kvm_sregs kvm_sregs;
-
- memset(&kvm_sregs, 0, sizeof kvm_sregs);
- r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
- if (r)
- goto out;
- r = -EFAULT;
- if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs))
- goto out;
- r = 0;
- break;
- }
- case KVM_SET_SREGS: {
- struct kvm_sregs kvm_sregs;
-
- r = -EFAULT;
- if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs))
- goto out;
- r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
- if (r)
- goto out;
- r = 0;
- break;
- }
- case KVM_TRANSLATE: {
- struct kvm_translation tr;
-
- r = -EFAULT;
- if (copy_from_user(&tr, argp, sizeof tr))
- goto out;
- r = kvm_vcpu_ioctl_translate(vcpu, &tr);
- if (r)
- goto out;
- r = -EFAULT;
- if (copy_to_user(argp, &tr, sizeof tr))
- goto out;
- r = 0;
- break;
- }
- case KVM_INTERRUPT: {
- struct kvm_interrupt irq;
-
- r = -EFAULT;
- if (copy_from_user(&irq, argp, sizeof irq))
- goto out;
- r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
- if (r)
- goto out;
- r = 0;
- break;
- }
- case KVM_DEBUG_GUEST: {
- struct kvm_debug_guest dbg;
-
- r = -EFAULT;
- if (copy_from_user(&dbg, argp, sizeof dbg))
- goto out;
- r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg);
- if (r)
- goto out;
- r = 0;
- break;
- }
- case KVM_GET_MSRS:
- r = msr_io(vcpu, argp, kvm_get_msr, 1);
- break;
- case KVM_SET_MSRS:
- r = msr_io(vcpu, argp, do_set_msr, 0);
- break;
- case KVM_SET_CPUID: {
- struct kvm_cpuid __user *cpuid_arg = argp;
- struct kvm_cpuid cpuid;
-
- r = -EFAULT;
- if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
- goto out;
- r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
- if (r)
- goto out;
- break;
- }
- case KVM_SET_SIGNAL_MASK: {
- struct kvm_signal_mask __user *sigmask_arg = argp;
- struct kvm_signal_mask kvm_sigmask;
- sigset_t sigset, *p;
-
- p = NULL;
- if (argp) {
- r = -EFAULT;
- if (copy_from_user(&kvm_sigmask, argp,
- sizeof kvm_sigmask))
- goto out;
- r = -EINVAL;
- if (kvm_sigmask.len != sizeof sigset)
- goto out;
- r = -EFAULT;
- if (copy_from_user(&sigset, sigmask_arg->sigset,
- sizeof sigset))
- goto out;
- p = &sigset;
- }
- r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset);
- break;
- }
- case KVM_GET_FPU: {
- struct kvm_fpu fpu;
-
- memset(&fpu, 0, sizeof fpu);
- r = kvm_vcpu_ioctl_get_fpu(vcpu, &fpu);
- if (r)
- goto out;
- r = -EFAULT;
- if (copy_to_user(argp, &fpu, sizeof fpu))
- goto out;
- r = 0;
- break;
- }
- case KVM_SET_FPU: {
- struct kvm_fpu fpu;
-
- r = -EFAULT;
- if (copy_from_user(&fpu, argp, sizeof fpu))
- goto out;
- r = kvm_vcpu_ioctl_set_fpu(vcpu, &fpu);
- if (r)
- goto out;
- r = 0;
- break;
- }
- case KVM_GET_LAPIC: {
- struct kvm_lapic_state lapic;
-
- memset(&lapic, 0, sizeof lapic);
- r = kvm_vcpu_ioctl_get_lapic(vcpu, &lapic);
- if (r)
- goto out;
- r = -EFAULT;
- if (copy_to_user(argp, &lapic, sizeof lapic))
- goto out;
- r = 0;
- break;
- }
- case KVM_SET_LAPIC: {
- struct kvm_lapic_state lapic;
-
- r = -EFAULT;
- if (copy_from_user(&lapic, argp, sizeof lapic))
- goto out;
- r = kvm_vcpu_ioctl_set_lapic(vcpu, &lapic);;
- if (r)
- goto out;
- r = 0;
- break;
- }
- default:
- ;
- }
-out:
- return r;
-}
-
-static long kvm_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_CREATE_VCPU:
- r = kvm_vm_ioctl_create_vcpu(kvm, arg);
- if (r < 0)
- goto out;
- break;
- case KVM_SET_MEMORY_REGION: {
- struct kvm_memory_region kvm_mem;
-
- r = -EFAULT;
- if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
- goto out;
- r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_mem);
- if (r)
- goto out;
- break;
- }
- case KVM_GET_DIRTY_LOG: {
- struct kvm_dirty_log log;
-
- r = -EFAULT;
- if (copy_from_user(&log, argp, sizeof log))
- goto out;
- r = kvm_vm_ioctl_get_dirty_log(kvm, &log);
- if (r)
- goto out;
- break;
- }
- case KVM_SET_MEMORY_ALIAS: {
- struct kvm_memory_alias alias;
-
- r = -EFAULT;
- if (copy_from_user(&alias, argp, sizeof alias))
- goto out;
- r = kvm_vm_ioctl_set_memory_alias(kvm, &alias);
- if (r)
- goto out;
- break;
- }
- case KVM_CREATE_IRQCHIP:
- r = -ENOMEM;
- kvm->vpic = kvm_create_pic(kvm);
- if (kvm->vpic) {
- r = kvm_ioapic_init(kvm);
- if (r) {
- kfree(kvm->vpic);
- kvm->vpic = NULL;
- goto out;
- }
- }
- else
- goto out;
- break;
- case KVM_IRQ_LINE: {
- struct kvm_irq_level irq_event;
-
- r = -EFAULT;
- if (copy_from_user(&irq_event, argp, sizeof irq_event))
- goto out;
- if (irqchip_in_kernel(kvm)) {
- mutex_lock(&kvm->lock);
- if (irq_event.irq < 16)
- kvm_pic_set_irq(pic_irqchip(kvm),
- irq_event.irq,
- irq_event.level);
- kvm_ioapic_set_irq(kvm->vioapic,
- irq_event.irq,
- irq_event.level);
- mutex_unlock(&kvm->lock);
- r = 0;
- }
- break;
- }
- case KVM_GET_IRQCHIP: {
- /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
- struct kvm_irqchip chip;
-
- r = -EFAULT;
- if (copy_from_user(&chip, argp, sizeof chip))
- goto out;
- r = -ENXIO;
- if (!irqchip_in_kernel(kvm))
- goto out;
- r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
- if (r)
- goto out;
- r = -EFAULT;
- if (copy_to_user(argp, &chip, sizeof chip))
- goto out;
- r = 0;
- break;
- }
- case KVM_SET_IRQCHIP: {
- /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
- struct kvm_irqchip chip;
-
- r = -EFAULT;
- if (copy_from_user(&chip, argp, sizeof chip))
- goto out;
- r = -ENXIO;
- if (!irqchip_in_kernel(kvm))
- goto out;
- r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
- if (r)
- goto out;
- r = 0;
- break;
- }
- default:
- ;
- }
-out:
- return r;
-}
-
-static struct page *kvm_vm_nopage(struct vm_area_struct *vma,
- unsigned long address,
- int *type)
-{
- struct kvm *kvm = vma->vm_file->private_data;
- unsigned long pgoff;
- struct page *page;
-
- pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
- page = gfn_to_page(kvm, pgoff);
- if (!page)
- return NOPAGE_SIGBUS;
- get_page(page);
- if (type != NULL)
- *type = VM_FAULT_MINOR;
-
- return page;
-}
-
-static struct vm_operations_struct kvm_vm_vm_ops = {
- .nopage = kvm_vm_nopage,
-};
-
-static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)
-{
- vma->vm_ops = &kvm_vm_vm_ops;
- return 0;
-}
-
-static struct file_operations kvm_vm_fops = {
- .release = kvm_vm_release,
- .unlocked_ioctl = kvm_vm_ioctl,
- .compat_ioctl = kvm_vm_ioctl,
- .mmap = kvm_vm_mmap,
-};
-
-static int kvm_dev_ioctl_create_vm(void)
-{
- int fd, r;
- struct inode *inode;
- struct file *file;
- struct kvm *kvm;
-
- kvm = kvm_create_vm();
- if (IS_ERR(kvm))
- return PTR_ERR(kvm);
- r = anon_inode_getfd(&fd, &inode, &file, "kvm-vm", &kvm_vm_fops, kvm);
- if (r) {
- kvm_destroy_vm(kvm);
- return r;
- }
-
- kvm->filp = file;
-
- return fd;
-}
-
-static long kvm_dev_ioctl(struct file *filp,
- unsigned int ioctl, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- long r = -EINVAL;
-
- switch (ioctl) {
- case KVM_GET_API_VERSION:
- r = -EINVAL;
- if (arg)
- goto out;
- r = KVM_API_VERSION;
- break;
- case KVM_CREATE_VM:
- r = -EINVAL;
- if (arg)
- goto out;
- r = kvm_dev_ioctl_create_vm();
- break;
- case KVM_GET_MSR_INDEX_LIST: {
- struct kvm_msr_list __user *user_msr_list = argp;
- struct kvm_msr_list msr_list;
- unsigned n;
-
- r = -EFAULT;
- if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
- goto out;
- n = msr_list.nmsrs;
- msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
- if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
- goto out;
- r = -E2BIG;
- if (n < num_msrs_to_save)
- goto out;
- r = -EFAULT;
- if (copy_to_user(user_msr_list->indices, &msrs_to_save,
- num_msrs_to_save * sizeof(u32)))
- goto out;
- if (copy_to_user(user_msr_list->indices
- + num_msrs_to_save * sizeof(u32),
- &emulated_msrs,
- ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
- goto out;
- r = 0;
- break;
- }
- case KVM_CHECK_EXTENSION: {
- int ext = (long)argp;
-
- switch (ext) {
- case KVM_CAP_IRQCHIP:
- case KVM_CAP_HLT:
- r = 1;
- break;
- default:
- r = 0;
- break;
- }
- break;
- }
- case KVM_GET_VCPU_MMAP_SIZE:
- r = -EINVAL;
- if (arg)
- goto out;
- r = 2 * PAGE_SIZE;
- break;
- default:
- ;
- }
-out:
- return r;
-}
-
-static struct file_operations kvm_chardev_ops = {
- .unlocked_ioctl = kvm_dev_ioctl,
- .compat_ioctl = kvm_dev_ioctl,
-};
-
-static struct miscdevice kvm_dev = {
- KVM_MINOR,
- "kvm",
- &kvm_chardev_ops,
-};
-
-/*
- * Make sure that a cpu that is being hot-unplugged does not have any vcpus
- * cached on it.
- */
-static void decache_vcpus_on_cpu(int cpu)
-{
- struct kvm *vm;
- struct kvm_vcpu *vcpu;
- int i;
-
- spin_lock(&kvm_lock);
- list_for_each_entry(vm, &vm_list, vm_list)
- for (i = 0; i < KVM_MAX_VCPUS; ++i) {
- vcpu = vm->vcpus[i];
- if (!vcpu)
- continue;
- /*
- * If the vcpu is locked, then it is running on some
- * other cpu and therefore it is not cached on the
- * cpu in question.
- *
- * If it's not locked, check the last cpu it executed
- * on.
- */
- if (mutex_trylock(&vcpu->mutex)) {
- if (vcpu->cpu == cpu) {
- kvm_x86_ops->vcpu_decache(vcpu);
- vcpu->cpu = -1;
- }
- mutex_unlock(&vcpu->mutex);
- }
- }
- spin_unlock(&kvm_lock);
-}
-
-static void hardware_enable(void *junk)
-{
- int cpu = raw_smp_processor_id();
-
- if (cpu_isset(cpu, cpus_hardware_enabled))
- return;
- cpu_set(cpu, cpus_hardware_enabled);
- kvm_x86_ops->hardware_enable(NULL);
-}
-
-static void hardware_disable(void *junk)
-{
- int cpu = raw_smp_processor_id();
-
- if (!cpu_isset(cpu, cpus_hardware_enabled))
- return;
- cpu_clear(cpu, cpus_hardware_enabled);
- decache_vcpus_on_cpu(cpu);
- kvm_x86_ops->hardware_disable(NULL);
-}
-
-static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
- void *v)
-{
- int cpu = (long)v;
-
- switch (val) {
- case CPU_DYING:
- case CPU_DYING_FROZEN:
- printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
- cpu);
- hardware_disable(NULL);
- break;
- case CPU_UP_CANCELED:
- case CPU_UP_CANCELED_FROZEN:
- printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
- cpu);
- smp_call_function_single(cpu, hardware_disable, NULL, 0, 1);
- break;
- case CPU_ONLINE:
- case CPU_ONLINE_FROZEN:
- printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
- cpu);
- smp_call_function_single(cpu, hardware_enable, NULL, 0, 1);
- break;
- }
- return NOTIFY_OK;
-}
-
-static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
- void *v)
-{
- if (val == SYS_RESTART) {
- /*
- * Some (well, at least mine) BIOSes hang on reboot if
- * in vmx root mode.
- */
- printk(KERN_INFO "kvm: exiting hardware virtualization\n");
- on_each_cpu(hardware_disable, NULL, 0, 1);
- }
- return NOTIFY_OK;
-}
-
-static struct notifier_block kvm_reboot_notifier = {
- .notifier_call = kvm_reboot,
- .priority = 0,
-};
-
-void kvm_io_bus_init(struct kvm_io_bus *bus)
-{
- memset(bus, 0, sizeof(*bus));
-}
-
-void kvm_io_bus_destroy(struct kvm_io_bus *bus)
-{
- int i;
-
- for (i = 0; i < bus->dev_count; i++) {
- struct kvm_io_device *pos = bus->devs[i];
-
- kvm_iodevice_destructor(pos);
- }
-}
-
-struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr)
-{
- int i;
-
- for (i = 0; i < bus->dev_count; i++) {
- struct kvm_io_device *pos = bus->devs[i];
-
- if (pos->in_range(pos, addr))
- return pos;
- }
-
- return NULL;
-}
-
-void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev)
-{
- BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1));
-
- bus->devs[bus->dev_count++] = dev;
-}
-
-static struct notifier_block kvm_cpu_notifier = {
- .notifier_call = kvm_cpu_hotplug,
- .priority = 20, /* must be > scheduler priority */
-};
-
-static u64 stat_get(void *_offset)
-{
- unsigned offset = (long)_offset;
- u64 total = 0;
- struct kvm *kvm;
- struct kvm_vcpu *vcpu;
- int i;
-
- spin_lock(&kvm_lock);
- list_for_each_entry(kvm, &vm_list, vm_list)
- for (i = 0; i < KVM_MAX_VCPUS; ++i) {
- vcpu = kvm->vcpus[i];
- if (vcpu)
- total += *(u32 *)((void *)vcpu + offset);
- }
- spin_unlock(&kvm_lock);
- return total;
-}
-
-DEFINE_SIMPLE_ATTRIBUTE(stat_fops, stat_get, NULL, "%llu\n");
-
-static __init void kvm_init_debug(void)
-{
- struct kvm_stats_debugfs_item *p;
-
- debugfs_dir = debugfs_create_dir("kvm", NULL);
- for (p = debugfs_entries; p->name; ++p)
- p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir,
- (void *)(long)p->offset,
- &stat_fops);
-}
-
-static void kvm_exit_debug(void)
-{
- struct kvm_stats_debugfs_item *p;
-
- for (p = debugfs_entries; p->name; ++p)
- debugfs_remove(p->dentry);
- debugfs_remove(debugfs_dir);
-}
-
-static int kvm_suspend(struct sys_device *dev, pm_message_t state)
-{
- hardware_disable(NULL);
- return 0;
-}
-
-static int kvm_resume(struct sys_device *dev)
-{
- hardware_enable(NULL);
- return 0;
-}
-
-static struct sysdev_class kvm_sysdev_class = {
- .name = "kvm",
- .suspend = kvm_suspend,
- .resume = kvm_resume,
-};
-
-static struct sys_device kvm_sysdev = {
- .id = 0,
- .cls = &kvm_sysdev_class,
-};
-
-hpa_t bad_page_address;
-
-static inline
-struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn)
-{
- return container_of(pn, struct kvm_vcpu, preempt_notifier);
-}
-
-static void kvm_sched_in(struct preempt_notifier *pn, int cpu)
-{
- struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
-
- kvm_x86_ops->vcpu_load(vcpu, cpu);
-}
-
-static void kvm_sched_out(struct preempt_notifier *pn,
- struct task_struct *next)
-{
- struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
-
- kvm_x86_ops->vcpu_put(vcpu);
-}
-
-int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size,
- struct module *module)
-{
- int r;
- int cpu;
-
- if (kvm_x86_ops) {
- printk(KERN_ERR "kvm: already loaded the other module\n");
- return -EEXIST;
- }
-
- if (!ops->cpu_has_kvm_support()) {
- printk(KERN_ERR "kvm: no hardware support\n");
- return -EOPNOTSUPP;
- }
- if (ops->disabled_by_bios()) {
- printk(KERN_ERR "kvm: disabled by bios\n");
- return -EOPNOTSUPP;
- }
-
- kvm_x86_ops = ops;
-
- r = kvm_x86_ops->hardware_setup();
- if (r < 0)
- goto out;
-
- for_each_online_cpu(cpu) {
- smp_call_function_single(cpu,
- kvm_x86_ops->check_processor_compatibility,
- &r, 0, 1);
- if (r < 0)
- goto out_free_0;
- }
-
- on_each_cpu(hardware_enable, NULL, 0, 1);
- r = register_cpu_notifier(&kvm_cpu_notifier);
- if (r)
- goto out_free_1;
- register_reboot_notifier(&kvm_reboot_notifier);
-
- r = sysdev_class_register(&kvm_sysdev_class);
- if (r)
- goto out_free_2;
-
- r = sysdev_register(&kvm_sysdev);
- if (r)
- goto out_free_3;
-
- /* A kmem cache lets us meet the alignment requirements of fx_save. */
- kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size,
- __alignof__(struct kvm_vcpu), 0, 0);
- if (!kvm_vcpu_cache) {
- r = -ENOMEM;
- goto out_free_4;
- }
-
- kvm_chardev_ops.owner = module;
-
- r = misc_register(&kvm_dev);
- if (r) {
- printk (KERN_ERR "kvm: misc device register failed\n");
- goto out_free;
- }
-
- kvm_preempt_ops.sched_in = kvm_sched_in;
- kvm_preempt_ops.sched_out = kvm_sched_out;
-
- return r;
-
-out_free:
- kmem_cache_destroy(kvm_vcpu_cache);
-out_free_4:
- sysdev_unregister(&kvm_sysdev);
-out_free_3:
- sysdev_class_unregister(&kvm_sysdev_class);
-out_free_2:
- unregister_reboot_notifier(&kvm_reboot_notifier);
- unregister_cpu_notifier(&kvm_cpu_notifier);
-out_free_1:
- on_each_cpu(hardware_disable, NULL, 0, 1);
-out_free_0:
- kvm_x86_ops->hardware_unsetup();
-out:
- kvm_x86_ops = NULL;
- return r;
-}
-
-void kvm_exit_x86(void)
-{
- misc_deregister(&kvm_dev);
- kmem_cache_destroy(kvm_vcpu_cache);
- sysdev_unregister(&kvm_sysdev);
- sysdev_class_unregister(&kvm_sysdev_class);
- unregister_reboot_notifier(&kvm_reboot_notifier);
- unregister_cpu_notifier(&kvm_cpu_notifier);
- on_each_cpu(hardware_disable, NULL, 0, 1);
- kvm_x86_ops->hardware_unsetup();
- kvm_x86_ops = NULL;
-}
-
-static __init int kvm_init(void)
-{
- static struct page *bad_page;
- int r;
-
- r = kvm_mmu_module_init();
- if (r)
- goto out4;
-
- kvm_init_debug();
-
- kvm_init_msr_list();
-
- if ((bad_page = alloc_page(GFP_KERNEL)) == NULL) {
- r = -ENOMEM;
- goto out;
- }
-
- bad_page_address = page_to_pfn(bad_page) << PAGE_SHIFT;
- memset(__va(bad_page_address), 0, PAGE_SIZE);
-
- return 0;
-
-out:
- kvm_exit_debug();
- kvm_mmu_module_exit();
-out4:
- return r;
-}
-
-static __exit void kvm_exit(void)
-{
- kvm_exit_debug();
- __free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT));
- kvm_mmu_module_exit();
-}
-
-module_init(kvm_init)
-module_exit(kvm_exit)
-
-EXPORT_SYMBOL_GPL(kvm_init_x86);
-EXPORT_SYMBOL_GPL(kvm_exit_x86);