1118 строки
30 KiB
C
1118 строки
30 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/bug.h>
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#include <linux/mm.h>
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#include <linux/mmu_notifier.h>
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#include <linux/preempt.h>
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#include <linux/msi.h>
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#include <linux/slab.h>
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#include <linux/rcupdate.h>
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#include <linux/ratelimit.h>
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#include <linux/err.h>
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#include <linux/irqflags.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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#ifndef KVM_MMIO_SIZE
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#define KVM_MMIO_SIZE 8
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#endif
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/*
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* The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
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* in kvm, other bits are visible for userspace which are defined in
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* include/linux/kvm_h.
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*/
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#define KVM_MEMSLOT_INVALID (1UL << 16)
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/* Two fragments for cross MMIO pages. */
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#define KVM_MAX_MMIO_FRAGMENTS 2
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/*
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* For the normal pfn, the highest 12 bits should be zero,
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* so we can mask bit 62 ~ bit 52 to indicate the error pfn,
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* mask bit 63 to indicate the noslot pfn.
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*/
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#define KVM_PFN_ERR_MASK (0x7ffULL << 52)
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#define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
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#define KVM_PFN_NOSLOT (0x1ULL << 63)
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#define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
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#define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
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#define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
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/*
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* error pfns indicate that the gfn is in slot but faild to
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* translate it to pfn on host.
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*/
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static inline bool is_error_pfn(pfn_t pfn)
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{
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return !!(pfn & KVM_PFN_ERR_MASK);
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}
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/*
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* error_noslot pfns indicate that the gfn can not be
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* translated to pfn - it is not in slot or failed to
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* translate it to pfn.
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*/
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static inline bool is_error_noslot_pfn(pfn_t pfn)
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{
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return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
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}
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/* noslot pfn indicates that the gfn is not in slot. */
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static inline bool is_noslot_pfn(pfn_t pfn)
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{
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return pfn == KVM_PFN_NOSLOT;
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}
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#define KVM_HVA_ERR_BAD (PAGE_OFFSET)
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#define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
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static inline bool kvm_is_error_hva(unsigned long addr)
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{
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return addr >= PAGE_OFFSET;
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}
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#define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
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static inline bool is_error_page(struct page *page)
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{
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return IS_ERR(page);
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}
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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_CLOCK_UPDATE 8
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#define KVM_REQ_KICK 9
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#define KVM_REQ_DEACTIVATE_FPU 10
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#define KVM_REQ_EVENT 11
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#define KVM_REQ_APF_HALT 12
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#define KVM_REQ_STEAL_UPDATE 13
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#define KVM_REQ_NMI 14
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#define KVM_REQ_PMU 15
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#define KVM_REQ_PMI 16
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#define KVM_REQ_WATCHDOG 17
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#define KVM_REQ_MASTERCLOCK_UPDATE 18
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#define KVM_REQ_MCLOCK_INPROGRESS 19
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#define KVM_REQ_EPR_EXIT 20
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#define KVM_REQ_SCAN_IOAPIC 21
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#define KVM_USERSPACE_IRQ_SOURCE_ID 0
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#define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
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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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extern raw_spinlock_t kvm_lock;
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extern struct list_head vm_list;
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struct kvm_io_range {
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gpa_t addr;
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int len;
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struct kvm_io_device *dev;
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};
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#define NR_IOBUS_DEVS 1000
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struct kvm_io_bus {
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int dev_count;
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struct kvm_io_range range[];
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};
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enum kvm_bus {
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KVM_MMIO_BUS,
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KVM_PIO_BUS,
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KVM_VIRTIO_CCW_NOTIFY_BUS,
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KVM_NR_BUSES
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};
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int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
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int len, const void *val);
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int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
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void *val);
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int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
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int len, struct kvm_io_device *dev);
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int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
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struct kvm_io_device *dev);
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#ifdef CONFIG_KVM_ASYNC_PF
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struct kvm_async_pf {
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struct work_struct work;
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struct list_head link;
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struct list_head queue;
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struct kvm_vcpu *vcpu;
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struct mm_struct *mm;
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gva_t gva;
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unsigned long addr;
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struct kvm_arch_async_pf arch;
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struct page *page;
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bool done;
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};
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void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
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void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
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int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
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struct kvm_arch_async_pf *arch);
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int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
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#endif
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enum {
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OUTSIDE_GUEST_MODE,
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IN_GUEST_MODE,
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EXITING_GUEST_MODE,
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READING_SHADOW_PAGE_TABLES,
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};
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/*
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* Sometimes a large or cross-page mmio needs to be broken up into separate
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* exits for userspace servicing.
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*/
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struct kvm_mmio_fragment {
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gpa_t gpa;
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void *data;
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unsigned len;
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};
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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 cpu;
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int vcpu_id;
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int srcu_idx;
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int mode;
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unsigned long requests;
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unsigned long guest_debug;
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struct mutex mutex;
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struct kvm_run *run;
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int fpu_active;
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int guest_fpu_loaded, guest_xcr0_loaded;
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wait_queue_head_t wq;
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struct pid *pid;
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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_cur_fragment;
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int mmio_nr_fragments;
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struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
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#endif
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#ifdef CONFIG_KVM_ASYNC_PF
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struct {
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u32 queued;
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struct list_head queue;
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struct list_head done;
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spinlock_t lock;
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} async_pf;
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#endif
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#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
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/*
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* Cpu relax intercept or pause loop exit optimization
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* in_spin_loop: set when a vcpu does a pause loop exit
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* or cpu relax intercepted.
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* dy_eligible: indicates whether vcpu is eligible for directed yield.
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*/
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struct {
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bool in_spin_loop;
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bool dy_eligible;
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} spin_loop;
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#endif
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bool preempted;
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struct kvm_vcpu_arch arch;
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};
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static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
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{
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return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
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}
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/*
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* Some of the bitops functions do not support too long bitmaps.
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* This number must be determined not to exceed such limits.
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*/
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#define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
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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 *dirty_bitmap;
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struct kvm_arch_memory_slot arch;
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unsigned long userspace_addr;
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u32 flags;
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short id;
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};
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static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
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{
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return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
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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 irq_source_id, int level,
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bool line_status);
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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 hlist_node link;
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};
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#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
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struct kvm_irq_routing_table {
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int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
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struct kvm_kernel_irq_routing_entry *rt_entries;
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u32 nr_rt_entries;
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/*
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* Array indexed by gsi. Each entry contains list of irq chips
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* the gsi is connected to.
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*/
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struct hlist_head map[0];
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};
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#else
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struct kvm_irq_routing_table {};
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#endif
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#ifndef KVM_PRIVATE_MEM_SLOTS
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#define KVM_PRIVATE_MEM_SLOTS 0
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#endif
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#ifndef KVM_MEM_SLOTS_NUM
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#define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
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#endif
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/*
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* Note:
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* memslots are not sorted by id anymore, please use id_to_memslot()
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* to get the memslot by its id.
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*/
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struct kvm_memslots {
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u64 generation;
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struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
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/* The mapping table from slot id to the index in memslots[]. */
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short id_to_index[KVM_MEM_SLOTS_NUM];
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};
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struct kvm {
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spinlock_t mmu_lock;
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struct mutex slots_lock;
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struct mm_struct *mm; /* userspace tied to this vm */
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struct kvm_memslots *memslots;
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struct srcu_struct srcu;
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#ifdef CONFIG_KVM_APIC_ARCHITECTURE
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u32 bsp_vcpu_id;
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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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int last_boosted_vcpu;
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struct list_head vm_list;
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struct mutex lock;
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struct kvm_io_bus *buses[KVM_NR_BUSES];
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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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struct list_head resampler_list;
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struct mutex resampler_lock;
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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_ring *coalesced_mmio_ring;
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spinlock_t ring_lock;
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struct list_head coalesced_zones;
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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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/*
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* Update side is protected by irq_lock and,
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* if configured, irqfds.lock.
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*/
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struct kvm_irq_routing_table __rcu *irq_routing;
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struct hlist_head mask_notifier_list;
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struct hlist_head irq_ack_notifier_list;
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#endif
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#if defined(CONFIG_MMU_NOTIFIER) && defined(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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long tlbs_dirty;
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struct list_head devices;
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};
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#define kvm_err(fmt, ...) \
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pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
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#define kvm_info(fmt, ...) \
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pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
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#define kvm_debug(fmt, ...) \
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pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
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#define kvm_pr_unimpl(fmt, ...) \
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pr_err_ratelimited("kvm [%i]: " fmt, \
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task_tgid_nr(current), ## __VA_ARGS__)
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/* The guest did something we don't support. */
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#define vcpu_unimpl(vcpu, fmt, ...) \
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kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
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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; \
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idx < atomic_read(&kvm->online_vcpus) && \
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(vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
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idx++)
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#define kvm_for_each_memslot(memslot, slots) \
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for (memslot = &slots->memslots[0]; \
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memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
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memslot++)
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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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int __must_check vcpu_load(struct kvm_vcpu *vcpu);
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void vcpu_put(struct kvm_vcpu *vcpu);
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#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
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int kvm_irqfd_init(void);
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void kvm_irqfd_exit(void);
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#else
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static inline int kvm_irqfd_init(void)
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{
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return 0;
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}
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static inline void kvm_irqfd_exit(void)
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{
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}
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#endif
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int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
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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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void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new,
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u64 last_generation);
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static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
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{
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return rcu_dereference_check(kvm->memslots,
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srcu_read_lock_held(&kvm->srcu)
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|| lockdep_is_held(&kvm->slots_lock));
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}
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static inline struct kvm_memory_slot *
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id_to_memslot(struct kvm_memslots *slots, int id)
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{
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int index = slots->id_to_index[id];
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struct kvm_memory_slot *slot;
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slot = &slots->memslots[index];
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WARN_ON(slot->id != id);
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return slot;
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}
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/*
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* KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
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* - create a new memory slot
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* - delete an existing memory slot
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* - modify an existing memory slot
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* -- move it in the guest physical memory space
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* -- just change its flags
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*
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* Since flags can be changed by some of these operations, the following
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* differentiation is the best we can do for __kvm_set_memory_region():
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*/
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enum kvm_mr_change {
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KVM_MR_CREATE,
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KVM_MR_DELETE,
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KVM_MR_MOVE,
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KVM_MR_FLAGS_ONLY,
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};
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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 __kvm_set_memory_region(struct kvm *kvm,
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struct kvm_userspace_memory_region *mem);
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void kvm_arch_free_memslot(struct kvm_memory_slot *free,
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struct kvm_memory_slot *dont);
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int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
|
|
int kvm_arch_prepare_memory_region(struct kvm *kvm,
|
|
struct kvm_memory_slot *memslot,
|
|
struct kvm_userspace_memory_region *mem,
|
|
enum kvm_mr_change change);
|
|
void kvm_arch_commit_memory_region(struct kvm *kvm,
|
|
struct kvm_userspace_memory_region *mem,
|
|
const struct kvm_memory_slot *old,
|
|
enum kvm_mr_change change);
|
|
bool kvm_largepages_enabled(void);
|
|
void kvm_disable_largepages(void);
|
|
/* flush all memory translations */
|
|
void kvm_arch_flush_shadow_all(struct kvm *kvm);
|
|
/* flush memory translations pointing to 'slot' */
|
|
void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
|
|
struct kvm_memory_slot *slot);
|
|
|
|
int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
|
|
int nr_pages);
|
|
|
|
struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
|
|
unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
|
|
unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
|
|
void kvm_release_page_clean(struct page *page);
|
|
void kvm_release_page_dirty(struct page *page);
|
|
void kvm_set_page_dirty(struct page *page);
|
|
void kvm_set_page_accessed(struct page *page);
|
|
|
|
pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
|
|
pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
|
|
bool write_fault, bool *writable);
|
|
pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
|
|
pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
|
|
bool *writable);
|
|
pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
|
|
pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
|
|
|
|
void kvm_release_pfn_dirty(pfn_t pfn);
|
|
void kvm_release_pfn_clean(pfn_t pfn);
|
|
void kvm_set_pfn_dirty(pfn_t pfn);
|
|
void kvm_set_pfn_accessed(pfn_t pfn);
|
|
void kvm_get_pfn(pfn_t pfn);
|
|
|
|
int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
|
|
int len);
|
|
int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
|
|
unsigned long len);
|
|
int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
|
|
int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
|
|
void *data, unsigned long len);
|
|
int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
|
|
int offset, int len);
|
|
int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
|
|
unsigned long len);
|
|
int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
|
|
void *data, unsigned long len);
|
|
int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
|
|
gpa_t gpa, unsigned long len);
|
|
int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
|
|
int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
|
|
struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
|
|
int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
|
|
unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
|
|
void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
|
|
void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
|
|
gfn_t gfn);
|
|
|
|
void kvm_vcpu_block(struct kvm_vcpu *vcpu);
|
|
void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
|
|
bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
|
|
void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
|
|
void kvm_resched(struct kvm_vcpu *vcpu);
|
|
void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
|
|
void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
|
|
|
|
void kvm_flush_remote_tlbs(struct kvm *kvm);
|
|
void kvm_reload_remote_mmus(struct kvm *kvm);
|
|
void kvm_make_mclock_inprogress_request(struct kvm *kvm);
|
|
void kvm_make_scan_ioapic_request(struct kvm *kvm);
|
|
|
|
long kvm_arch_dev_ioctl(struct file *filp,
|
|
unsigned int ioctl, unsigned long arg);
|
|
long kvm_arch_vcpu_ioctl(struct file *filp,
|
|
unsigned int ioctl, unsigned long arg);
|
|
int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
|
|
|
|
int kvm_dev_ioctl_check_extension(long ext);
|
|
|
|
int kvm_get_dirty_log(struct kvm *kvm,
|
|
struct kvm_dirty_log *log, int *is_dirty);
|
|
int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
|
|
struct kvm_dirty_log *log);
|
|
|
|
int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
|
|
struct kvm_userspace_memory_region *mem);
|
|
int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
|
|
bool line_status);
|
|
long kvm_arch_vm_ioctl(struct file *filp,
|
|
unsigned int ioctl, unsigned long arg);
|
|
|
|
int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
|
|
int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
|
|
|
|
int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
|
|
struct kvm_translation *tr);
|
|
|
|
int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
|
|
int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
|
|
int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
|
|
struct kvm_sregs *sregs);
|
|
int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
|
|
struct kvm_sregs *sregs);
|
|
int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
|
|
struct kvm_mp_state *mp_state);
|
|
int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
|
|
struct kvm_mp_state *mp_state);
|
|
int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
|
|
struct kvm_guest_debug *dbg);
|
|
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
|
|
|
|
int kvm_arch_init(void *opaque);
|
|
void kvm_arch_exit(void);
|
|
|
|
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
|
|
void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
|
|
|
|
void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
|
|
void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
|
|
void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
|
|
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
|
|
int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
|
|
int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
|
|
void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
|
|
|
|
int kvm_arch_hardware_enable(void *garbage);
|
|
void kvm_arch_hardware_disable(void *garbage);
|
|
int kvm_arch_hardware_setup(void);
|
|
void kvm_arch_hardware_unsetup(void);
|
|
void kvm_arch_check_processor_compat(void *rtn);
|
|
int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
|
|
int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
|
|
|
|
void kvm_free_physmem(struct kvm *kvm);
|
|
|
|
void *kvm_kvzalloc(unsigned long size);
|
|
void kvm_kvfree(const void *addr);
|
|
|
|
#ifndef __KVM_HAVE_ARCH_VM_ALLOC
|
|
static inline struct kvm *kvm_arch_alloc_vm(void)
|
|
{
|
|
return kzalloc(sizeof(struct kvm), GFP_KERNEL);
|
|
}
|
|
|
|
static inline void kvm_arch_free_vm(struct kvm *kvm)
|
|
{
|
|
kfree(kvm);
|
|
}
|
|
#endif
|
|
|
|
static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
|
|
{
|
|
#ifdef __KVM_HAVE_ARCH_WQP
|
|
return vcpu->arch.wqp;
|
|
#else
|
|
return &vcpu->wq;
|
|
#endif
|
|
}
|
|
|
|
int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
|
|
void kvm_arch_destroy_vm(struct kvm *kvm);
|
|
void kvm_arch_sync_events(struct kvm *kvm);
|
|
|
|
int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
|
|
void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
|
|
|
|
bool kvm_is_mmio_pfn(pfn_t pfn);
|
|
|
|
struct kvm_irq_ack_notifier {
|
|
struct hlist_node link;
|
|
unsigned gsi;
|
|
void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
|
|
};
|
|
|
|
struct kvm_assigned_dev_kernel {
|
|
struct kvm_irq_ack_notifier ack_notifier;
|
|
struct list_head list;
|
|
int assigned_dev_id;
|
|
int host_segnr;
|
|
int host_busnr;
|
|
int host_devfn;
|
|
unsigned int entries_nr;
|
|
int host_irq;
|
|
bool host_irq_disabled;
|
|
bool pci_2_3;
|
|
struct msix_entry *host_msix_entries;
|
|
int guest_irq;
|
|
struct msix_entry *guest_msix_entries;
|
|
unsigned long irq_requested_type;
|
|
int irq_source_id;
|
|
int flags;
|
|
struct pci_dev *dev;
|
|
struct kvm *kvm;
|
|
spinlock_t intx_lock;
|
|
spinlock_t intx_mask_lock;
|
|
char irq_name[32];
|
|
struct pci_saved_state *pci_saved_state;
|
|
};
|
|
|
|
struct kvm_irq_mask_notifier {
|
|
void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
|
|
int irq;
|
|
struct hlist_node link;
|
|
};
|
|
|
|
void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
|
|
struct kvm_irq_mask_notifier *kimn);
|
|
void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
|
|
struct kvm_irq_mask_notifier *kimn);
|
|
void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
|
|
bool mask);
|
|
|
|
int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
|
|
bool line_status);
|
|
int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
|
|
int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
|
|
int irq_source_id, int level, bool line_status);
|
|
bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
|
|
void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
|
|
void kvm_register_irq_ack_notifier(struct kvm *kvm,
|
|
struct kvm_irq_ack_notifier *kian);
|
|
void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
|
|
struct kvm_irq_ack_notifier *kian);
|
|
int kvm_request_irq_source_id(struct kvm *kvm);
|
|
void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
|
|
|
|
/* For vcpu->arch.iommu_flags */
|
|
#define KVM_IOMMU_CACHE_COHERENCY 0x1
|
|
|
|
#ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
|
|
int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
|
|
void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
|
|
int kvm_iommu_map_guest(struct kvm *kvm);
|
|
int kvm_iommu_unmap_guest(struct kvm *kvm);
|
|
int kvm_assign_device(struct kvm *kvm,
|
|
struct kvm_assigned_dev_kernel *assigned_dev);
|
|
int kvm_deassign_device(struct kvm *kvm,
|
|
struct kvm_assigned_dev_kernel *assigned_dev);
|
|
#else
|
|
static inline int kvm_iommu_map_pages(struct kvm *kvm,
|
|
struct kvm_memory_slot *slot)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
|
|
struct kvm_memory_slot *slot)
|
|
{
|
|
}
|
|
|
|
static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static inline void __guest_enter(void)
|
|
{
|
|
/*
|
|
* This is running in ioctl context so we can avoid
|
|
* the call to vtime_account() with its unnecessary idle check.
|
|
*/
|
|
vtime_account_system(current);
|
|
current->flags |= PF_VCPU;
|
|
}
|
|
|
|
static inline void __guest_exit(void)
|
|
{
|
|
/*
|
|
* This is running in ioctl context so we can avoid
|
|
* the call to vtime_account() with its unnecessary idle check.
|
|
*/
|
|
vtime_account_system(current);
|
|
current->flags &= ~PF_VCPU;
|
|
}
|
|
|
|
#ifdef CONFIG_CONTEXT_TRACKING
|
|
extern void guest_enter(void);
|
|
extern void guest_exit(void);
|
|
|
|
#else /* !CONFIG_CONTEXT_TRACKING */
|
|
static inline void guest_enter(void)
|
|
{
|
|
__guest_enter();
|
|
}
|
|
|
|
static inline void guest_exit(void)
|
|
{
|
|
__guest_exit();
|
|
}
|
|
#endif /* !CONFIG_CONTEXT_TRACKING */
|
|
|
|
static inline void kvm_guest_enter(void)
|
|
{
|
|
unsigned long flags;
|
|
|
|
BUG_ON(preemptible());
|
|
|
|
local_irq_save(flags);
|
|
guest_enter();
|
|
local_irq_restore(flags);
|
|
|
|
/* KVM does not hold any references to rcu protected data when it
|
|
* switches CPU into a guest mode. In fact switching to a guest mode
|
|
* is very similar to exiting to userspase from rcu point of view. In
|
|
* addition CPU may stay in a guest mode for quite a long time (up to
|
|
* one time slice). Lets treat guest mode as quiescent state, just like
|
|
* we do with user-mode execution.
|
|
*/
|
|
rcu_virt_note_context_switch(smp_processor_id());
|
|
}
|
|
|
|
static inline void kvm_guest_exit(void)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
guest_exit();
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
/*
|
|
* search_memslots() and __gfn_to_memslot() are here because they are
|
|
* used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
|
|
* gfn_to_memslot() itself isn't here as an inline because that would
|
|
* bloat other code too much.
|
|
*/
|
|
static inline struct kvm_memory_slot *
|
|
search_memslots(struct kvm_memslots *slots, gfn_t gfn)
|
|
{
|
|
struct kvm_memory_slot *memslot;
|
|
|
|
kvm_for_each_memslot(memslot, slots)
|
|
if (gfn >= memslot->base_gfn &&
|
|
gfn < memslot->base_gfn + memslot->npages)
|
|
return memslot;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct kvm_memory_slot *
|
|
__gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
|
|
{
|
|
return search_memslots(slots, gfn);
|
|
}
|
|
|
|
static inline unsigned long
|
|
__gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
|
|
{
|
|
return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
|
|
}
|
|
|
|
static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
|
|
{
|
|
return gfn_to_memslot(kvm, gfn)->id;
|
|
}
|
|
|
|
static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
|
|
{
|
|
/* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
|
|
return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
|
|
(base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
|
|
}
|
|
|
|
static inline gfn_t
|
|
hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
|
|
{
|
|
gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
|
|
|
|
return slot->base_gfn + gfn_offset;
|
|
}
|
|
|
|
static inline gpa_t gfn_to_gpa(gfn_t gfn)
|
|
{
|
|
return (gpa_t)gfn << PAGE_SHIFT;
|
|
}
|
|
|
|
static inline gfn_t gpa_to_gfn(gpa_t gpa)
|
|
{
|
|
return (gfn_t)(gpa >> 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;
|
|
|
|
#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
|
|
static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
|
|
{
|
|
if (unlikely(kvm->mmu_notifier_count))
|
|
return 1;
|
|
/*
|
|
* Ensure the read of mmu_notifier_count happens before the read
|
|
* of mmu_notifier_seq. This interacts with the smp_wmb() in
|
|
* mmu_notifier_invalidate_range_end to make sure that the caller
|
|
* either sees the old (non-zero) value of mmu_notifier_count or
|
|
* the new (incremented) value of mmu_notifier_seq.
|
|
* PowerPC Book3s HV KVM calls this under a per-page lock
|
|
* rather than under kvm->mmu_lock, for scalability, so
|
|
* can't rely on kvm->mmu_lock to keep things ordered.
|
|
*/
|
|
smp_rmb();
|
|
if (kvm->mmu_notifier_seq != mmu_seq)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
|
|
|
|
#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);
|
|
int kvm_set_routing_entry(struct kvm_irq_routing_table *rt,
|
|
struct kvm_kernel_irq_routing_entry *e,
|
|
const struct kvm_irq_routing_entry *ue);
|
|
void kvm_free_irq_routing(struct kvm *kvm);
|
|
|
|
int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
|
|
|
|
#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_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
|
|
|
|
#ifdef CONFIG_HAVE_KVM_IRQCHIP
|
|
int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
|
|
void kvm_irqfd_release(struct kvm *kvm);
|
|
void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
|
|
#else
|
|
static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline void kvm_irqfd_release(struct kvm *kvm) {}
|
|
#endif
|
|
|
|
#else
|
|
|
|
static inline void kvm_eventfd_init(struct kvm *kvm) {}
|
|
|
|
static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline void kvm_irqfd_release(struct kvm *kvm) {}
|
|
|
|
#ifdef CONFIG_HAVE_KVM_IRQCHIP
|
|
static inline void kvm_irq_routing_update(struct kvm *kvm,
|
|
struct kvm_irq_routing_table *irq_rt)
|
|
{
|
|
rcu_assign_pointer(kvm->irq_routing, irq_rt);
|
|
}
|
|
#endif
|
|
|
|
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;
|
|
}
|
|
|
|
bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
|
|
|
|
#else
|
|
|
|
static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
|
|
|
|
long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
|
|
unsigned long arg);
|
|
|
|
void kvm_free_all_assigned_devices(struct kvm *kvm);
|
|
|
|
#else
|
|
|
|
static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
|
|
unsigned long arg)
|
|
{
|
|
return -ENOTTY;
|
|
}
|
|
|
|
static inline void kvm_free_all_assigned_devices(struct kvm *kvm) {}
|
|
|
|
#endif
|
|
|
|
static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
|
|
{
|
|
set_bit(req, &vcpu->requests);
|
|
}
|
|
|
|
static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
|
|
{
|
|
if (test_bit(req, &vcpu->requests)) {
|
|
clear_bit(req, &vcpu->requests);
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
extern bool kvm_rebooting;
|
|
|
|
struct kvm_device_ops;
|
|
|
|
struct kvm_device {
|
|
struct kvm_device_ops *ops;
|
|
struct kvm *kvm;
|
|
void *private;
|
|
struct list_head vm_node;
|
|
};
|
|
|
|
/* create, destroy, and name are mandatory */
|
|
struct kvm_device_ops {
|
|
const char *name;
|
|
int (*create)(struct kvm_device *dev, u32 type);
|
|
|
|
/*
|
|
* Destroy is responsible for freeing dev.
|
|
*
|
|
* Destroy may be called before or after destructors are called
|
|
* on emulated I/O regions, depending on whether a reference is
|
|
* held by a vcpu or other kvm component that gets destroyed
|
|
* after the emulated I/O.
|
|
*/
|
|
void (*destroy)(struct kvm_device *dev);
|
|
|
|
int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
|
|
int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
|
|
int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
|
|
long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
|
|
unsigned long arg);
|
|
};
|
|
|
|
void kvm_device_get(struct kvm_device *dev);
|
|
void kvm_device_put(struct kvm_device *dev);
|
|
struct kvm_device *kvm_device_from_filp(struct file *filp);
|
|
|
|
extern struct kvm_device_ops kvm_mpic_ops;
|
|
extern struct kvm_device_ops kvm_xics_ops;
|
|
|
|
#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
|
|
|
|
static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
|
|
{
|
|
vcpu->spin_loop.in_spin_loop = val;
|
|
}
|
|
static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
|
|
{
|
|
vcpu->spin_loop.dy_eligible = val;
|
|
}
|
|
|
|
#else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
|
|
|
|
static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
|
|
{
|
|
}
|
|
|
|
static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
|
|
{
|
|
}
|
|
|
|
static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
#endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
|
|
#endif
|
|
|