[PATCH 17/18] KVM: Introduce traces to track memory attributes modification.
From: Nicolas Saenz Julienne <hidden>
Date: 2024-06-09 15:59:09
Also in:
kvm, linux-arch, linux-doc, linux-trace-kernel, lkml
Subsystem:
kernel virtual machine (kvm), the rest, tracing · Maintainers:
Paolo Bonzini, Linus Torvalds, Steven Rostedt, Masami Hiramatsu
Introduce traces that track memory attributes modification. Signed-off-by: Nicolas Saenz Julienne <redacted> --- include/trace/events/kvm.h | 20 ++++++++++++++++++++ virt/kvm/kvm_main.c | 2 ++ 2 files changed, 22 insertions(+)
diff --git a/include/trace/events/kvm.h b/include/trace/events/kvm.h
index 74e40d5d4af42..aa6caeb16f12a 100644
--- a/include/trace/events/kvm.h
+++ b/include/trace/events/kvm.h@@ -489,6 +489,26 @@ TRACE_EVENT(kvm_test_age_hva, TP_printk("mmu notifier test age hva: %#016lx", __entry->hva) ); +TRACE_EVENT(kvm_vm_set_mem_attributes, + TP_PROTO(u64 start, u64 cnt, u64 attributes), + TP_ARGS(start, cnt, attributes), + + TP_STRUCT__entry( + __field( u64, start ) + __field( u64, cnt ) + __field( u64, attributes ) + ), + + TP_fast_assign( + __entry->start = start; + __entry->cnt = cnt; + __entry->attributes = attributes; + ), + + TP_printk("gfn 0x%llx, cnt 0x%llx, attributes 0x%llx", + __entry->start, __entry->cnt, __entry->attributes) +); + #endif /* _TRACE_KVM_MAIN_H */ /* This part must be outside protection */
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index bd27fc01e9715..1c493ece3deb1 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c@@ -2556,6 +2556,8 @@ static int kvm_vm_set_mem_attributes(struct kvm *kvm, gfn_t start, gfn_t end, kvm_handle_gfn_range(kvm, &post_set_range); + trace_kvm_vm_set_mem_attributes(start, end - start, attributes); + out_unlock: mutex_unlock(&kvm->slots_lock);
--
2.40.1