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3cc4e148b9
Add a new stat that counts the number of times a remote TLB flush is requested, regardless of whether it kicks vCPUs out of guest mode. This allows us to look at how often flushes are initiated. Unlike remote_tlb_flush, this one applies to ARM's instruction-set-based TLB flush implementation, so apply it there too. Original-by: David Matlack <dmatlack@google.com> Signed-off-by: Jing Zhang <jingzhangos@google.com> Message-Id: <20210817002639.3856694-1-jingzhangos@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
101 lines
2.2 KiB
C
101 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef __KVM_TYPES_H__
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#define __KVM_TYPES_H__
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struct kvm;
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struct kvm_async_pf;
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struct kvm_device_ops;
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struct kvm_interrupt;
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struct kvm_irq_routing_table;
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struct kvm_memory_slot;
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struct kvm_one_reg;
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struct kvm_run;
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struct kvm_userspace_memory_region;
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struct kvm_vcpu;
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struct kvm_vcpu_init;
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struct kvm_memslots;
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enum kvm_mr_change;
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#include <linux/types.h>
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#include <asm/kvm_types.h>
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/*
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* Address types:
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*
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* gva - guest virtual address
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* gpa - guest physical address
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* gfn - guest frame number
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* hva - host virtual address
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* hpa - host physical address
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* hfn - host frame number
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*/
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typedef unsigned long gva_t;
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typedef u64 gpa_t;
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typedef u64 gfn_t;
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#define GPA_INVALID (~(gpa_t)0)
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typedef unsigned long hva_t;
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typedef u64 hpa_t;
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typedef u64 hfn_t;
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typedef hfn_t kvm_pfn_t;
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struct gfn_to_hva_cache {
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u64 generation;
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gpa_t gpa;
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unsigned long hva;
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unsigned long len;
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struct kvm_memory_slot *memslot;
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};
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struct gfn_to_pfn_cache {
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u64 generation;
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gfn_t gfn;
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kvm_pfn_t pfn;
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bool dirty;
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};
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#ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE
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/*
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* Memory caches are used to preallocate memory ahead of various MMU flows,
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* e.g. page fault handlers. Gracefully handling allocation failures deep in
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* MMU flows is problematic, as is triggering reclaim, I/O, etc... while
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* holding MMU locks. Note, these caches act more like prefetch buffers than
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* classical caches, i.e. objects are not returned to the cache on being freed.
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*/
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struct kvm_mmu_memory_cache {
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int nobjs;
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gfp_t gfp_zero;
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struct kmem_cache *kmem_cache;
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void *objects[KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE];
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};
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#endif
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#define HALT_POLL_HIST_COUNT 32
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struct kvm_vm_stat_generic {
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u64 remote_tlb_flush;
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u64 remote_tlb_flush_requests;
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};
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struct kvm_vcpu_stat_generic {
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u64 halt_successful_poll;
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u64 halt_attempted_poll;
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u64 halt_poll_invalid;
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u64 halt_wakeup;
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u64 halt_poll_success_ns;
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u64 halt_poll_fail_ns;
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u64 halt_wait_ns;
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u64 halt_poll_success_hist[HALT_POLL_HIST_COUNT];
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u64 halt_poll_fail_hist[HALT_POLL_HIST_COUNT];
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u64 halt_wait_hist[HALT_POLL_HIST_COUNT];
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};
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#define KVM_STATS_NAME_SIZE 48
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#endif /* __KVM_TYPES_H__ */
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