556 lines
15 KiB
C
556 lines
15 KiB
C
#ifndef __KVM_HOST_H
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#define __KVM_HOST_H
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/*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*/
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#include <linux/types.h>
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#include <linux/hardirq.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/spinlock.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/preempt.h>
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#include <linux/msi.h>
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#include <asm/signal.h>
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#include <linux/kvm.h>
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#include <linux/kvm_para.h>
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#include <linux/kvm_types.h>
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#include <asm/kvm_host.h>
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/*
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* vcpu->requests bit members
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*/
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#define KVM_REQ_TLB_FLUSH 0
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#define KVM_REQ_MIGRATE_TIMER 1
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#define KVM_REQ_REPORT_TPR_ACCESS 2
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#define KVM_REQ_MMU_RELOAD 3
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#define KVM_REQ_TRIPLE_FAULT 4
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#define KVM_REQ_PENDING_TIMER 5
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#define KVM_REQ_UNHALT 6
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#define KVM_REQ_MMU_SYNC 7
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#define KVM_REQ_KVMCLOCK_UPDATE 8
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#define KVM_REQ_KICK 9
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#define KVM_USERSPACE_IRQ_SOURCE_ID 0
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struct kvm;
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struct kvm_vcpu;
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extern struct kmem_cache *kvm_vcpu_cache;
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/*
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* It would be nice to use something smarter than a linear search, TBD...
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* Thankfully we dont expect many devices to register (famous last words :),
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* so until then it will suffice. At least its abstracted so we can change
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* in one place.
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*/
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struct kvm_io_bus {
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int dev_count;
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#define NR_IOBUS_DEVS 6
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struct kvm_io_device *devs[NR_IOBUS_DEVS];
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};
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void kvm_io_bus_init(struct kvm_io_bus *bus);
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void kvm_io_bus_destroy(struct kvm_io_bus *bus);
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int kvm_io_bus_write(struct kvm_io_bus *bus, gpa_t addr, int len,
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const void *val);
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int kvm_io_bus_read(struct kvm_io_bus *bus, gpa_t addr, int len,
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void *val);
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int __kvm_io_bus_register_dev(struct kvm_io_bus *bus,
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struct kvm_io_device *dev);
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int kvm_io_bus_register_dev(struct kvm *kvm, struct kvm_io_bus *bus,
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struct kvm_io_device *dev);
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void __kvm_io_bus_unregister_dev(struct kvm_io_bus *bus,
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struct kvm_io_device *dev);
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void kvm_io_bus_unregister_dev(struct kvm *kvm, struct kvm_io_bus *bus,
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struct kvm_io_device *dev);
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struct kvm_vcpu {
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struct kvm *kvm;
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#ifdef CONFIG_PREEMPT_NOTIFIERS
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struct preempt_notifier preempt_notifier;
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#endif
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int vcpu_id;
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struct mutex mutex;
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int cpu;
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struct kvm_run *run;
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unsigned long requests;
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unsigned long guest_debug;
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int fpu_active;
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int guest_fpu_loaded;
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wait_queue_head_t wq;
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int sigset_active;
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sigset_t sigset;
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struct kvm_vcpu_stat stat;
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#ifdef CONFIG_HAS_IOMEM
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int mmio_needed;
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int mmio_read_completed;
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int mmio_is_write;
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int mmio_size;
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unsigned char mmio_data[8];
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gpa_t mmio_phys_addr;
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#endif
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struct kvm_vcpu_arch arch;
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};
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struct kvm_memory_slot {
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gfn_t base_gfn;
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unsigned long npages;
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unsigned long flags;
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unsigned long *rmap;
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unsigned long *dirty_bitmap;
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struct {
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unsigned long rmap_pde;
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int write_count;
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} *lpage_info[KVM_NR_PAGE_SIZES - 1];
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unsigned long userspace_addr;
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int user_alloc;
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};
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struct kvm_kernel_irq_routing_entry {
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u32 gsi;
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u32 type;
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int (*set)(struct kvm_kernel_irq_routing_entry *e,
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struct kvm *kvm, int level);
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union {
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struct {
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unsigned irqchip;
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unsigned pin;
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} irqchip;
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struct msi_msg msi;
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};
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struct list_head link;
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};
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struct kvm {
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spinlock_t mmu_lock;
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spinlock_t requests_lock;
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struct rw_semaphore slots_lock;
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struct mm_struct *mm; /* userspace tied to this vm */
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int nmemslots;
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struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
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KVM_PRIVATE_MEM_SLOTS];
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#ifdef CONFIG_KVM_APIC_ARCHITECTURE
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u32 bsp_vcpu_id;
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struct kvm_vcpu *bsp_vcpu;
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#endif
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struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
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atomic_t online_vcpus;
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struct list_head vm_list;
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struct mutex lock;
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struct kvm_io_bus mmio_bus;
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struct kvm_io_bus pio_bus;
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#ifdef CONFIG_HAVE_KVM_EVENTFD
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struct {
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spinlock_t lock;
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struct list_head items;
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} irqfds;
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struct list_head ioeventfds;
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#endif
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struct kvm_vm_stat stat;
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struct kvm_arch arch;
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atomic_t users_count;
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#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
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struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
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struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
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#endif
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struct mutex irq_lock;
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#ifdef CONFIG_HAVE_KVM_IRQCHIP
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struct list_head irq_routing; /* of kvm_kernel_irq_routing_entry */
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struct hlist_head mask_notifier_list;
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#endif
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#ifdef KVM_ARCH_WANT_MMU_NOTIFIER
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struct mmu_notifier mmu_notifier;
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unsigned long mmu_notifier_seq;
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long mmu_notifier_count;
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#endif
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};
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/* The guest did something we don't support. */
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#define pr_unimpl(vcpu, fmt, ...) \
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do { \
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if (printk_ratelimit()) \
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printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
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current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
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} while (0)
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#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
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#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
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static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
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{
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smp_rmb();
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return kvm->vcpus[i];
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}
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#define kvm_for_each_vcpu(idx, vcpup, kvm) \
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for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
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idx < atomic_read(&kvm->online_vcpus) && vcpup; \
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vcpup = kvm_get_vcpu(kvm, ++idx))
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int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
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void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
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void vcpu_load(struct kvm_vcpu *vcpu);
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void vcpu_put(struct kvm_vcpu *vcpu);
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int kvm_init(void *opaque, unsigned int vcpu_size,
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struct module *module);
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void kvm_exit(void);
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void kvm_get_kvm(struct kvm *kvm);
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void kvm_put_kvm(struct kvm *kvm);
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#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
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#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
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static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
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struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
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extern struct page *bad_page;
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extern pfn_t bad_pfn;
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int is_error_page(struct page *page);
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int is_error_pfn(pfn_t pfn);
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int kvm_is_error_hva(unsigned long addr);
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int kvm_set_memory_region(struct kvm *kvm,
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struct kvm_userspace_memory_region *mem,
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int user_alloc);
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int __kvm_set_memory_region(struct kvm *kvm,
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struct kvm_userspace_memory_region *mem,
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int user_alloc);
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int kvm_arch_set_memory_region(struct kvm *kvm,
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struct kvm_userspace_memory_region *mem,
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struct kvm_memory_slot old,
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int user_alloc);
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void kvm_disable_largepages(void);
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void kvm_arch_flush_shadow(struct kvm *kvm);
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gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
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struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
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unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
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void kvm_release_page_clean(struct page *page);
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void kvm_release_page_dirty(struct page *page);
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void kvm_set_page_dirty(struct page *page);
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void kvm_set_page_accessed(struct page *page);
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pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
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void kvm_release_pfn_dirty(pfn_t);
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void kvm_release_pfn_clean(pfn_t pfn);
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void kvm_set_pfn_dirty(pfn_t pfn);
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void kvm_set_pfn_accessed(pfn_t pfn);
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void kvm_get_pfn(pfn_t pfn);
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int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
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int len);
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int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
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unsigned long len);
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int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
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int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
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int offset, int len);
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int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
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unsigned long len);
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int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
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int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
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struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
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int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
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void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
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void kvm_vcpu_block(struct kvm_vcpu *vcpu);
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void kvm_resched(struct kvm_vcpu *vcpu);
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void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
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void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
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void kvm_flush_remote_tlbs(struct kvm *kvm);
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void kvm_reload_remote_mmus(struct kvm *kvm);
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long kvm_arch_dev_ioctl(struct file *filp,
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unsigned int ioctl, unsigned long arg);
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long kvm_arch_vcpu_ioctl(struct file *filp,
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unsigned int ioctl, unsigned long arg);
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int kvm_dev_ioctl_check_extension(long ext);
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int kvm_get_dirty_log(struct kvm *kvm,
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struct kvm_dirty_log *log, int *is_dirty);
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int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
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struct kvm_dirty_log *log);
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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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int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
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int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
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int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
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struct kvm_translation *tr);
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int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
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int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
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int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
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struct kvm_sregs *sregs);
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int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
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struct kvm_sregs *sregs);
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int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
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struct kvm_mp_state *mp_state);
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int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
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struct kvm_mp_state *mp_state);
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int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
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struct kvm_guest_debug *dbg);
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int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
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int kvm_arch_init(void *opaque);
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void kvm_arch_exit(void);
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int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
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void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
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void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
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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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struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
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int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
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void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
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int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
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void kvm_arch_hardware_enable(void *garbage);
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void kvm_arch_hardware_disable(void *garbage);
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int kvm_arch_hardware_setup(void);
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void kvm_arch_hardware_unsetup(void);
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void kvm_arch_check_processor_compat(void *rtn);
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int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
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void kvm_free_physmem(struct kvm *kvm);
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struct kvm *kvm_arch_create_vm(void);
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void kvm_arch_destroy_vm(struct kvm *kvm);
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void kvm_free_all_assigned_devices(struct kvm *kvm);
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void kvm_arch_sync_events(struct kvm *kvm);
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int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
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void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
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int kvm_is_mmio_pfn(pfn_t pfn);
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struct kvm_irq_ack_notifier {
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struct hlist_node link;
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unsigned gsi;
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void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
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};
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#define KVM_ASSIGNED_MSIX_PENDING 0x1
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struct kvm_guest_msix_entry {
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u32 vector;
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u16 entry;
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u16 flags;
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};
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struct kvm_assigned_dev_kernel {
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struct kvm_irq_ack_notifier ack_notifier;
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struct work_struct interrupt_work;
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struct list_head list;
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int assigned_dev_id;
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int host_busnr;
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int host_devfn;
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unsigned int entries_nr;
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int host_irq;
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bool host_irq_disabled;
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struct msix_entry *host_msix_entries;
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int guest_irq;
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struct kvm_guest_msix_entry *guest_msix_entries;
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unsigned long irq_requested_type;
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int irq_source_id;
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int flags;
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struct pci_dev *dev;
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struct kvm *kvm;
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spinlock_t assigned_dev_lock;
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};
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struct kvm_irq_mask_notifier {
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void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
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int irq;
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struct hlist_node link;
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};
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void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
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struct kvm_irq_mask_notifier *kimn);
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void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
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struct kvm_irq_mask_notifier *kimn);
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void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
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int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level);
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void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
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void kvm_register_irq_ack_notifier(struct kvm *kvm,
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struct kvm_irq_ack_notifier *kian);
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void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
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struct kvm_irq_ack_notifier *kian);
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int kvm_request_irq_source_id(struct kvm *kvm);
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void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
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/* For vcpu->arch.iommu_flags */
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#define KVM_IOMMU_CACHE_COHERENCY 0x1
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#ifdef CONFIG_IOMMU_API
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int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn,
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unsigned long npages);
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int kvm_iommu_map_guest(struct kvm *kvm);
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int kvm_iommu_unmap_guest(struct kvm *kvm);
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int kvm_assign_device(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *assigned_dev);
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int kvm_deassign_device(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *assigned_dev);
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#else /* CONFIG_IOMMU_API */
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static inline int kvm_iommu_map_pages(struct kvm *kvm,
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gfn_t base_gfn,
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unsigned long npages)
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{
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return 0;
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}
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static inline int kvm_iommu_map_guest(struct kvm *kvm)
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{
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return -ENODEV;
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}
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static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
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{
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return 0;
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}
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static inline int kvm_assign_device(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *assigned_dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int kvm_deassign_device(struct kvm *kvm,
|
|
struct kvm_assigned_dev_kernel *assigned_dev)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_IOMMU_API */
|
|
|
|
static inline void kvm_guest_enter(void)
|
|
{
|
|
account_system_vtime(current);
|
|
current->flags |= PF_VCPU;
|
|
}
|
|
|
|
static inline void kvm_guest_exit(void)
|
|
{
|
|
account_system_vtime(current);
|
|
current->flags &= ~PF_VCPU;
|
|
}
|
|
|
|
static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
|
|
{
|
|
return slot - kvm->memslots;
|
|
}
|
|
|
|
static inline gpa_t gfn_to_gpa(gfn_t gfn)
|
|
{
|
|
return (gpa_t)gfn << PAGE_SHIFT;
|
|
}
|
|
|
|
static inline hpa_t pfn_to_hpa(pfn_t pfn)
|
|
{
|
|
return (hpa_t)pfn << PAGE_SHIFT;
|
|
}
|
|
|
|
static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
|
|
{
|
|
set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
|
|
}
|
|
|
|
enum kvm_stat_kind {
|
|
KVM_STAT_VM,
|
|
KVM_STAT_VCPU,
|
|
};
|
|
|
|
struct kvm_stats_debugfs_item {
|
|
const char *name;
|
|
int offset;
|
|
enum kvm_stat_kind kind;
|
|
struct dentry *dentry;
|
|
};
|
|
extern struct kvm_stats_debugfs_item debugfs_entries[];
|
|
extern struct dentry *kvm_debugfs_dir;
|
|
|
|
#ifdef KVM_ARCH_WANT_MMU_NOTIFIER
|
|
static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
|
|
{
|
|
if (unlikely(vcpu->kvm->mmu_notifier_count))
|
|
return 1;
|
|
/*
|
|
* Both reads happen under the mmu_lock and both values are
|
|
* modified under mmu_lock, so there's no need of smb_rmb()
|
|
* here in between, otherwise mmu_notifier_count should be
|
|
* read before mmu_notifier_seq, see
|
|
* mmu_notifier_invalidate_range_end write side.
|
|
*/
|
|
if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_HAVE_KVM_IRQCHIP
|
|
|
|
#define KVM_MAX_IRQ_ROUTES 1024
|
|
|
|
int kvm_setup_default_irq_routing(struct kvm *kvm);
|
|
int kvm_set_irq_routing(struct kvm *kvm,
|
|
const struct kvm_irq_routing_entry *entries,
|
|
unsigned nr,
|
|
unsigned flags);
|
|
void kvm_free_irq_routing(struct kvm *kvm);
|
|
|
|
#else
|
|
|
|
static inline void kvm_free_irq_routing(struct kvm *kvm) {}
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_HAVE_KVM_EVENTFD
|
|
|
|
void kvm_eventfd_init(struct kvm *kvm);
|
|
int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
|
|
void kvm_irqfd_release(struct kvm *kvm);
|
|
int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
|
|
|
|
#else
|
|
|
|
static inline void kvm_eventfd_init(struct kvm *kvm) {}
|
|
static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline void kvm_irqfd_release(struct kvm *kvm) {}
|
|
static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
#endif /* CONFIG_HAVE_KVM_EVENTFD */
|
|
|
|
#ifdef CONFIG_KVM_APIC_ARCHITECTURE
|
|
static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
|
|
{
|
|
return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
|
|
}
|
|
#endif
|
|
#endif
|