Commit 741e595f authored by Liam Merwick's avatar Liam Merwick Committed by Sean Christopherson
Browse files

KVM: Add trace_kvm_vm_set_mem_attributes() 



Add a tracing function that, for a guest memory range, displays
the start and end addresses plus the per-page attributes being set.

Signed-off-by: default avatarLiam Merwick <liam.merwick@oracle.com>
Reviewed-by: default avatarPankaj Gupta <pankaj.gupta@amd.com>
Link: https://lore.kernel.org/r/20250609091121.2497429-3-liam.merwick@oracle.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent 28224ef0

include/trace/events/kvm.h

+27 −0
Original line number Diff line number Diff line
@@ -473,6 +473,33 @@ TRACE_EVENT(kvm_dirty_ring_exit, 
	TP_printk("vcpu %d", __entry->vcpu_id)

);



#ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES

/*

 * @start:	Starting address of guest memory range

 * @end:	End address of guest memory range

 * @attr:	The value of the attribute being set.

 */

TRACE_EVENT(kvm_vm_set_mem_attributes,

	TP_PROTO(gfn_t start, gfn_t end, unsigned long attr),

	TP_ARGS(start, end, attr),



	TP_STRUCT__entry(

		__field(gfn_t,		start)

		__field(gfn_t,		end)

		__field(unsigned long,	attr)

	),



	TP_fast_assign(

		__entry->start		= start;

		__entry->end		= end;

		__entry->attr		= attr;

	),



	TP_printk("%#016llx -- %#016llx [0x%lx]",

		  __entry->start, __entry->end, __entry->attr)

);

#endif /* CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES */



TRACE_EVENT(kvm_unmap_hva_range,

	TP_PROTO(unsigned long start, unsigned long end),

	TP_ARGS(start, end),

virt/kvm/kvm_main.c

+2 −0
Original line number Diff line number Diff line
@@ -2558,6 +2558,8 @@ static int kvm_vm_set_mem_attributes(struct kvm *kvm, gfn_t start, gfn_t end, 


	entry = attributes ? xa_mk_value(attributes) : NULL;



	trace_kvm_vm_set_mem_attributes(start, end, attributes);



	mutex_lock(&kvm->slots_lock);



	/* Nothing to do if the entire range as the desired attributes. */