KVM: Portability: Split kvm_vm_ioctl v3
This patch splits kvm_vm_ioctl into archtecture independent parts, and x86 specific parts which go to kvm_arch_vcpu_ioctl in x86.c. The patch is unchanged since last submission. Common ioctls for all architectures are: KVM_CREATE_VCPU, KVM_GET_DIRTY_LOG, KVM_SET_USER_MEMORY_REGION x86 specific ioctls are: KVM_SET_MEMORY_REGION, KVM_GET/SET_NR_MMU_PAGES, KVM_SET_MEMORY_ALIAS, KVM_CREATE_IRQCHIP, KVM_CREATE_IRQ_LINE, KVM_GET/SET_IRQCHIP KVM_SET_TSS_ADDR Signed-off-by: Carsten Otte <cotte@de.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Carsten Otte
Avi Kivity
parent
b733bfb524
commit
1fe779f8ec
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@ -620,6 +620,13 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
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unsigned int ioctl, unsigned long arg);
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void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
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void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
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int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
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struct
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kvm_userspace_memory_region *mem,
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int user_alloc);
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long kvm_arch_vm_ioctl(struct file *filp,
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unsigned int ioctl, unsigned long arg);
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void kvm_arch_destroy_vm(struct kvm *kvm);
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__init void kvm_arch_init(void);
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@ -792,36 +792,16 @@ out:
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}
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EXPORT_SYMBOL_GPL(kvm_set_memory_region);
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static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
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struct
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kvm_userspace_memory_region *mem,
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int user_alloc)
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int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
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struct
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kvm_userspace_memory_region *mem,
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int user_alloc)
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{
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if (mem->slot >= KVM_MEMORY_SLOTS)
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return -EINVAL;
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return kvm_set_memory_region(kvm, mem, user_alloc);
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}
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static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
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u32 kvm_nr_mmu_pages)
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{
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if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
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return -EINVAL;
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mutex_lock(&kvm->lock);
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kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
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kvm->n_requested_mmu_pages = kvm_nr_mmu_pages;
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mutex_unlock(&kvm->lock);
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return 0;
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}
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static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
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{
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return kvm->n_alloc_mmu_pages;
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}
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/*
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* Get (and clear) the dirty memory log for a memory slot.
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*/
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@ -867,111 +847,6 @@ out:
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return r;
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}
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/*
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* Set a new alias region. Aliases map a portion of physical memory into
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* another portion. This is useful for memory windows, for example the PC
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* VGA region.
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*/
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static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
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struct kvm_memory_alias *alias)
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{
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int r, n;
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struct kvm_mem_alias *p;
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r = -EINVAL;
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/* General sanity checks */
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if (alias->memory_size & (PAGE_SIZE - 1))
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goto out;
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if (alias->guest_phys_addr & (PAGE_SIZE - 1))
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goto out;
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if (alias->slot >= KVM_ALIAS_SLOTS)
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goto out;
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if (alias->guest_phys_addr + alias->memory_size
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< alias->guest_phys_addr)
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goto out;
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if (alias->target_phys_addr + alias->memory_size
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< alias->target_phys_addr)
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goto out;
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mutex_lock(&kvm->lock);
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p = &kvm->aliases[alias->slot];
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p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
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p->npages = alias->memory_size >> PAGE_SHIFT;
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p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
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for (n = KVM_ALIAS_SLOTS; n > 0; --n)
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if (kvm->aliases[n - 1].npages)
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break;
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kvm->naliases = n;
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kvm_mmu_zap_all(kvm);
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mutex_unlock(&kvm->lock);
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return 0;
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out:
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return r;
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}
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static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
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{
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int r;
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r = 0;
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switch (chip->chip_id) {
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case KVM_IRQCHIP_PIC_MASTER:
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memcpy(&chip->chip.pic,
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&pic_irqchip(kvm)->pics[0],
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sizeof(struct kvm_pic_state));
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break;
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case KVM_IRQCHIP_PIC_SLAVE:
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memcpy(&chip->chip.pic,
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&pic_irqchip(kvm)->pics[1],
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sizeof(struct kvm_pic_state));
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break;
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case KVM_IRQCHIP_IOAPIC:
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memcpy(&chip->chip.ioapic,
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ioapic_irqchip(kvm),
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sizeof(struct kvm_ioapic_state));
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break;
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default:
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r = -EINVAL;
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break;
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}
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return r;
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}
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static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
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{
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int r;
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r = 0;
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switch (chip->chip_id) {
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case KVM_IRQCHIP_PIC_MASTER:
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memcpy(&pic_irqchip(kvm)->pics[0],
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&chip->chip.pic,
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sizeof(struct kvm_pic_state));
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break;
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case KVM_IRQCHIP_PIC_SLAVE:
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memcpy(&pic_irqchip(kvm)->pics[1],
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&chip->chip.pic,
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sizeof(struct kvm_pic_state));
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break;
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case KVM_IRQCHIP_IOAPIC:
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memcpy(ioapic_irqchip(kvm),
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&chip->chip.ioapic,
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sizeof(struct kvm_ioapic_state));
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break;
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default:
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r = -EINVAL;
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break;
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}
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kvm_pic_update_irq(pic_irqchip(kvm));
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return r;
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}
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int is_error_page(struct page *page)
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{
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return page == bad_page;
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@ -2661,16 +2536,6 @@ static int create_vcpu_fd(struct kvm_vcpu *vcpu)
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return fd;
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}
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static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr)
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{
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int ret;
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if (addr > (unsigned int)(-3 * PAGE_SIZE))
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return -1;
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ret = kvm_x86_ops->set_tss_addr(kvm, addr);
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return ret;
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}
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/*
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* Creates some virtual cpus. Good luck creating more than one.
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*/
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@ -2964,35 +2829,14 @@ static long kvm_vm_ioctl(struct file *filp,
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{
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struct kvm *kvm = filp->private_data;
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void __user *argp = (void __user *)arg;
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int r = -EINVAL;
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int r;
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switch (ioctl) {
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case KVM_SET_TSS_ADDR:
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r = kvm_vm_ioctl_set_tss_addr(kvm, arg);
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if (r < 0)
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goto out;
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break;
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case KVM_CREATE_VCPU:
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r = kvm_vm_ioctl_create_vcpu(kvm, arg);
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if (r < 0)
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goto out;
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break;
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case KVM_SET_MEMORY_REGION: {
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struct kvm_memory_region kvm_mem;
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struct kvm_userspace_memory_region kvm_userspace_mem;
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r = -EFAULT;
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if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
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goto out;
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kvm_userspace_mem.slot = kvm_mem.slot;
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kvm_userspace_mem.flags = kvm_mem.flags;
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kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr;
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kvm_userspace_mem.memory_size = kvm_mem.memory_size;
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r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0);
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if (r)
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goto out;
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break;
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}
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case KVM_SET_USER_MEMORY_REGION: {
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struct kvm_userspace_memory_region kvm_userspace_mem;
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@ -3006,14 +2850,6 @@ static long kvm_vm_ioctl(struct file *filp,
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goto out;
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break;
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}
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case KVM_SET_NR_MMU_PAGES:
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r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
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if (r)
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goto out;
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break;
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case KVM_GET_NR_MMU_PAGES:
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r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
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break;
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case KVM_GET_DIRTY_LOG: {
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struct kvm_dirty_log log;
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@ -3025,87 +2861,8 @@ static long kvm_vm_ioctl(struct file *filp,
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goto out;
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break;
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}
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case KVM_SET_MEMORY_ALIAS: {
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struct kvm_memory_alias alias;
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r = -EFAULT;
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if (copy_from_user(&alias, argp, sizeof alias))
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goto out;
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r = kvm_vm_ioctl_set_memory_alias(kvm, &alias);
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if (r)
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goto out;
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break;
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}
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case KVM_CREATE_IRQCHIP:
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r = -ENOMEM;
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kvm->vpic = kvm_create_pic(kvm);
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if (kvm->vpic) {
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r = kvm_ioapic_init(kvm);
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if (r) {
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kfree(kvm->vpic);
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kvm->vpic = NULL;
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goto out;
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}
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} else
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goto out;
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break;
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case KVM_IRQ_LINE: {
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struct kvm_irq_level irq_event;
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r = -EFAULT;
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if (copy_from_user(&irq_event, argp, sizeof irq_event))
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goto out;
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if (irqchip_in_kernel(kvm)) {
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mutex_lock(&kvm->lock);
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if (irq_event.irq < 16)
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kvm_pic_set_irq(pic_irqchip(kvm),
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irq_event.irq,
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irq_event.level);
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kvm_ioapic_set_irq(kvm->vioapic,
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irq_event.irq,
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irq_event.level);
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mutex_unlock(&kvm->lock);
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r = 0;
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}
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break;
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}
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case KVM_GET_IRQCHIP: {
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/* 0: PIC master, 1: PIC slave, 2: IOAPIC */
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struct kvm_irqchip chip;
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r = -EFAULT;
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if (copy_from_user(&chip, argp, sizeof chip))
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goto out;
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r = -ENXIO;
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if (!irqchip_in_kernel(kvm))
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goto out;
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r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
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if (r)
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goto out;
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r = -EFAULT;
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if (copy_to_user(argp, &chip, sizeof chip))
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goto out;
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r = 0;
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break;
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}
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case KVM_SET_IRQCHIP: {
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/* 0: PIC master, 1: PIC slave, 2: IOAPIC */
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struct kvm_irqchip chip;
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r = -EFAULT;
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if (copy_from_user(&chip, argp, sizeof chip))
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goto out;
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r = -ENXIO;
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if (!irqchip_in_kernel(kvm))
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goto out;
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r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
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if (r)
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goto out;
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r = 0;
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break;
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}
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default:
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;
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r = kvm_arch_vm_ioctl(filp, ioctl, arg);
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}
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out:
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return r;
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@ -300,6 +300,264 @@ out:
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return r;
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}
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static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr)
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{
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int ret;
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if (addr > (unsigned int)(-3 * PAGE_SIZE))
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return -1;
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ret = kvm_x86_ops->set_tss_addr(kvm, addr);
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return ret;
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}
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static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
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u32 kvm_nr_mmu_pages)
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{
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if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
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return -EINVAL;
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mutex_lock(&kvm->lock);
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kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
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kvm->n_requested_mmu_pages = kvm_nr_mmu_pages;
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mutex_unlock(&kvm->lock);
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return 0;
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}
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static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
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{
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return kvm->n_alloc_mmu_pages;
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}
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/*
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* Set a new alias region. Aliases map a portion of physical memory into
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* another portion. This is useful for memory windows, for example the PC
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* VGA region.
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*/
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static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
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struct kvm_memory_alias *alias)
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{
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int r, n;
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struct kvm_mem_alias *p;
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r = -EINVAL;
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/* General sanity checks */
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if (alias->memory_size & (PAGE_SIZE - 1))
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goto out;
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if (alias->guest_phys_addr & (PAGE_SIZE - 1))
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goto out;
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if (alias->slot >= KVM_ALIAS_SLOTS)
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goto out;
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if (alias->guest_phys_addr + alias->memory_size
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< alias->guest_phys_addr)
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goto out;
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if (alias->target_phys_addr + alias->memory_size
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< alias->target_phys_addr)
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goto out;
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mutex_lock(&kvm->lock);
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p = &kvm->aliases[alias->slot];
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p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
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p->npages = alias->memory_size >> PAGE_SHIFT;
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p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
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for (n = KVM_ALIAS_SLOTS; n > 0; --n)
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if (kvm->aliases[n - 1].npages)
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break;
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kvm->naliases = n;
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kvm_mmu_zap_all(kvm);
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mutex_unlock(&kvm->lock);
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return 0;
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out:
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return r;
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}
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static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
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{
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int r;
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r = 0;
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switch (chip->chip_id) {
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case KVM_IRQCHIP_PIC_MASTER:
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memcpy(&chip->chip.pic,
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&pic_irqchip(kvm)->pics[0],
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sizeof(struct kvm_pic_state));
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break;
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case KVM_IRQCHIP_PIC_SLAVE:
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memcpy(&chip->chip.pic,
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&pic_irqchip(kvm)->pics[1],
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sizeof(struct kvm_pic_state));
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break;
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case KVM_IRQCHIP_IOAPIC:
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memcpy(&chip->chip.ioapic,
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ioapic_irqchip(kvm),
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sizeof(struct kvm_ioapic_state));
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break;
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default:
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r = -EINVAL;
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break;
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}
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return r;
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}
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static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
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{
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int r;
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r = 0;
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switch (chip->chip_id) {
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case KVM_IRQCHIP_PIC_MASTER:
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memcpy(&pic_irqchip(kvm)->pics[0],
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&chip->chip.pic,
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sizeof(struct kvm_pic_state));
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break;
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case KVM_IRQCHIP_PIC_SLAVE:
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memcpy(&pic_irqchip(kvm)->pics[1],
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&chip->chip.pic,
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sizeof(struct kvm_pic_state));
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break;
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case KVM_IRQCHIP_IOAPIC:
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memcpy(ioapic_irqchip(kvm),
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&chip->chip.ioapic,
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sizeof(struct kvm_ioapic_state));
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break;
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default:
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r = -EINVAL;
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break;
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}
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kvm_pic_update_irq(pic_irqchip(kvm));
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return r;
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}
|
||||
|
||||
long kvm_arch_vm_ioctl(struct file *filp,
|
||||
unsigned int ioctl, unsigned long arg)
|
||||
{
|
||||
struct kvm *kvm = filp->private_data;
|
||||
void __user *argp = (void __user *)arg;
|
||||
int r = -EINVAL;
|
||||
|
||||
switch (ioctl) {
|
||||
case KVM_SET_TSS_ADDR:
|
||||
r = kvm_vm_ioctl_set_tss_addr(kvm, arg);
|
||||
if (r < 0)
|
||||
goto out;
|
||||
break;
|
||||
case KVM_SET_MEMORY_REGION: {
|
||||
struct kvm_memory_region kvm_mem;
|
||||
struct kvm_userspace_memory_region kvm_userspace_mem;
|
||||
|
||||
r = -EFAULT;
|
||||
if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
|
||||
goto out;
|
||||
kvm_userspace_mem.slot = kvm_mem.slot;
|
||||
kvm_userspace_mem.flags = kvm_mem.flags;
|
||||
kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr;
|
||||
kvm_userspace_mem.memory_size = kvm_mem.memory_size;
|
||||
r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0);
|
||||
if (r)
|
||||
goto out;
|
||||
break;
|
||||
}
|
||||
case KVM_SET_NR_MMU_PAGES:
|
||||
r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
|
||||
if (r)
|
||||
goto out;
|
||||
break;
|
||||
case KVM_GET_NR_MMU_PAGES:
|
||||
r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
|
||||
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 __init void kvm_init_msr_list(void)
|
||||
{
|
||||
u32 dummy[2];
|
||||
|
|
|
|||
Reference in New Issue