Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 65e7026a authored by Suresh Warrier's avatar Suresh Warrier Committed by Paul Mackerras
Browse files

KVM: PPC: Book3S HV: Counters for passthrough IRQ stats 



Add VCPU stat counters to track affinity for passthrough
interrupts.

pthru_all: Counts all passthrough interrupts whose IRQ mappings are
           in the kvmppc_passthru_irq_map structure.
pthru_host: Counts all cached passthrough interrupts that were injected
	    from the host through kvm_set_irq (i.e. not handled in
	    real mode).
pthru_bad_aff: Counts how many cached passthrough interrupts have
               bad affinity (receiving CPU is not running VCPU that is
	       the target of the virtual interrupt in the guest).

Signed-off-by: default avatarSuresh Warrier <warrier@linux.vnet.ibm.com>
Signed-off-by: default avatarPaul Mackerras <paulus@ozlabs.org>
parent 5d375199

arch/powerpc/include/asm/kvm_host.h

+3 −0
Original line number Diff line number Diff line
@@ -137,6 +137,9 @@ struct kvm_vcpu_stat { 
	u64 ld_slow;

	u64 st_slow;

#endif

	u64 pthru_all;

	u64 pthru_host;

	u64 pthru_bad_aff;

};



enum kvm_exit_types {

arch/powerpc/kvm/book3s.c

+3 −0
Original line number Diff line number Diff line
@@ -68,6 +68,9 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { 
	{ "ld_slow",     VCPU_STAT(ld_slow) },

	{ "st",          VCPU_STAT(st) },

	{ "st_slow",     VCPU_STAT(st_slow) },

	{ "pthru_all",       VCPU_STAT(pthru_all) },

	{ "pthru_host",      VCPU_STAT(pthru_host) },

	{ "pthru_bad_aff",   VCPU_STAT(pthru_bad_aff) },

	{ NULL }

};

arch/powerpc/kvm/book3s_hv_rm_xics.c

+13 −5
Original line number Diff line number Diff line
@@ -716,12 +716,20 @@ int kvmppc_rm_h_eoi(struct kvm_vcpu *vcpu, unsigned long xirr) 
		icp->rm_eoied_irq = irq;

	}



	if (state->host_irq && state->intr_cpu != -1) {

		int pcpu = cpu_first_thread_sibling(raw_smp_processor_id());

		if (state->intr_cpu != pcpu)

	if (state->host_irq) {

		++vcpu->stat.pthru_all;

		if (state->intr_cpu != -1) {

			int pcpu = raw_smp_processor_id();



			pcpu = cpu_first_thread_sibling(pcpu);

			++vcpu->stat.pthru_host;

			if (state->intr_cpu != pcpu) {

				++vcpu->stat.pthru_bad_aff;

				xics_opal_rm_set_server(state->host_irq, pcpu);

			}

			state->intr_cpu = -1;

		}

	}

 bail:

	return check_too_hard(xics, icp);

}