forked from Minki/linux
KVM: MMU: Add tracepoint for guest page aging
Signed-off-by: Avi Kivity <avi@redhat.com>
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43db669730
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@ -151,6 +151,9 @@ module_param(oos_shadow, bool, 0644);
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#define ACC_USER_MASK PT_USER_MASK
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#define ACC_ALL (ACC_EXEC_MASK | ACC_WRITE_MASK | ACC_USER_MASK)
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#include <trace/events/kvm.h>
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#undef TRACE_INCLUDE_FILE
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#define CREATE_TRACE_POINTS
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#include "mmutrace.h"
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@ -792,6 +795,7 @@ static int kvm_handle_hva(struct kvm *kvm, unsigned long hva,
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unsigned long data))
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{
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int i, j;
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int ret;
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int retval = 0;
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struct kvm_memslots *slots;
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@ -806,16 +810,17 @@ static int kvm_handle_hva(struct kvm *kvm, unsigned long hva,
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if (hva >= start && hva < end) {
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gfn_t gfn_offset = (hva - start) >> PAGE_SHIFT;
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retval |= handler(kvm, &memslot->rmap[gfn_offset],
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data);
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ret = handler(kvm, &memslot->rmap[gfn_offset], data);
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for (j = 0; j < KVM_NR_PAGE_SIZES - 1; ++j) {
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int idx = gfn_offset;
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idx /= KVM_PAGES_PER_HPAGE(PT_DIRECTORY_LEVEL + j);
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retval |= handler(kvm,
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ret |= handler(kvm,
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&memslot->lpage_info[j][idx].rmap_pde,
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data);
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}
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trace_kvm_age_page(hva, memslot, ret);
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retval |= ret;
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}
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}
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@ -164,6 +164,28 @@ TRACE_EVENT(kvm_fpu,
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TP_printk("%s", __print_symbolic(__entry->load, kvm_fpu_load_symbol))
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);
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TRACE_EVENT(kvm_age_page,
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TP_PROTO(ulong hva, struct kvm_memory_slot *slot, int ref),
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TP_ARGS(hva, slot, ref),
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TP_STRUCT__entry(
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__field( u64, hva )
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__field( u64, gfn )
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__field( u8, referenced )
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),
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TP_fast_assign(
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__entry->hva = hva;
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__entry->gfn =
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slot->base_gfn + ((hva - slot->userspace_addr) >> PAGE_SHIFT);
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__entry->referenced = ref;
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),
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TP_printk("hva %llx gfn %llx %s",
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__entry->hva, __entry->gfn,
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__entry->referenced ? "YOUNG" : "OLD")
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);
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#endif /* _TRACE_KVM_MAIN_H */
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/* This part must be outside protection */
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