Hi Marc, On 3/4/20 9:33 PM, Marc Zyngier wrote: > Just like for vLPIs, there is some configuration information that cannot > be directly communicated through the normal irqchip API, and we have to > use our good old friend set_vcpu_affinity as a side-band communication > mechanism. > > This is used to configure group and priority for a given vSGI. > > Signed-off-by: Marc Zyngier <[email protected]> > Reviewed-by: Zenghui Yu <[email protected]> > --- > drivers/irqchip/irq-gic-v3-its.c | 18 ++++++++++++++++++ > include/linux/irqchip/arm-gic-v4.h | 5 +++++ > 2 files changed, 23 insertions(+) > > diff --git a/drivers/irqchip/irq-gic-v3-its.c > b/drivers/irqchip/irq-gic-v3-its.c > index fb2b836c31ff..effb0e0b0c9d 100644 > --- a/drivers/irqchip/irq-gic-v3-its.c > +++ b/drivers/irqchip/irq-gic-v3-its.c > @@ -4033,6 +4033,23 @@ static int its_sgi_get_irqchip_state(struct irq_data > *d, > return 0; > } > > +static int its_sgi_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) > +{ > + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); > + struct its_cmd_info *info = vcpu_info; > + > + switch (info->cmd_type) { > + case PROP_UPDATE_SGI: PROP_UPDATE_VSGI directly? > + vpe->sgi_config[d->hwirq].priority = info->priority; > + vpe->sgi_config[d->hwirq].group = info->group; > + its_configure_sgi(d, false); > + return 0; > + extra line > + default: > + return -EINVAL; > + } > +} > + > static struct irq_chip its_sgi_irq_chip = { > .name = "GICv4.1-sgi", > .irq_mask = its_sgi_mask_irq, > @@ -4040,6 +4057,7 @@ static struct irq_chip its_sgi_irq_chip = { > .irq_set_affinity = its_sgi_set_affinity, > .irq_set_irqchip_state = its_sgi_set_irqchip_state, > .irq_get_irqchip_state = its_sgi_get_irqchip_state, > + .irq_set_vcpu_affinity = its_sgi_set_vcpu_affinity, > }; > > static int its_sgi_irq_domain_alloc(struct irq_domain *domain, > diff --git a/include/linux/irqchip/arm-gic-v4.h > b/include/linux/irqchip/arm-gic-v4.h > index 44e8c19e3d56..b4dbf899460b 100644 > --- a/include/linux/irqchip/arm-gic-v4.h > +++ b/include/linux/irqchip/arm-gic-v4.h > @@ -103,6 +103,7 @@ enum its_vcpu_info_cmd_type { > SCHEDULE_VPE, > DESCHEDULE_VPE, > INVALL_VPE, > + PROP_UPDATE_SGI, > }; > > struct its_cmd_info { > @@ -115,6 +116,10 @@ struct its_cmd_info { > bool g0en; > bool g1en; > }; > + struct { > + u8 priority; > + bool group; > + }; > }; > }; > > Reviewed-by: Eric Auger <[email protected]>
Eric _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
