Commit f2b5756b authored by Avi Kivity's avatar Avi Kivity
Browse files

KVM: Add instruction emulation statistics

parent f096ed85

drivers/kvm/kvm.h

+2 −0
Original line number Diff line number Diff line
@@ -249,6 +249,8 @@ struct kvm_stat { 
	u32 host_state_reload;

	u32 efer_reload;

	u32 fpu_reload;

	u32 insn_emulation;

	u32 insn_emulation_fail;

};



struct kvm_io_device {

drivers/kvm/x86.c

+4 −0
Original line number Diff line number Diff line
@@ -63,6 +63,8 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { 
	{ "host_state_reload", STAT_OFFSET(host_state_reload) },

	{ "efer_reload", STAT_OFFSET(efer_reload) },

	{ "fpu_reload", STAT_OFFSET(fpu_reload) },

	{ "insn_emulation", STAT_OFFSET(insn_emulation) },

	{ "insn_emulation_fail", STAT_OFFSET(insn_emulation_fail) },

	{ NULL }

};
@@ -1381,7 +1383,9 @@ int emulate_instruction(struct kvm_vcpu *vcpu, 
					get_segment_base(vcpu, VCPU_SREG_FS);



		r = x86_decode_insn(&vcpu->emulate_ctxt, &emulate_ops);

		++vcpu->stat.insn_emulation;

		if (r)  {

			++vcpu->stat.insn_emulation_fail;

			if (kvm_mmu_unprotect_page_virt(vcpu, cr2))

				return EMULATE_DONE;

			return EMULATE_FAIL;