| Message ID | 20230829143236.219348-3-clg@kaod.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ppc/xive: Rework Inter chip communication | expand |
On 29/08/2023 16:32, Cédric Le Goater wrote: > It will help us model the END triggers on the PowerNV machine, which > can be rerouted to another interrupt controller. > > Signed-off-by: Cédric Le Goater <clg@kaod.org> > --- > diff --git a/hw/intc/xive.c b/hw/intc/xive.c > index 56670b2cac6e..df3ee0496fe7 100644 > --- a/hw/intc/xive.c > +++ b/hw/intc/xive.c > @@ -1518,6 +1518,13 @@ static void xive_router_realize(DeviceState *dev, Error **errp) > assert(xrtr->xfb); > } > > +static void xive_router_end_notify_handler(XiveRouter *xrtr, XiveEAS *eas) > +{ > + XiveRouterClass *xrc = XIVE_ROUTER_GET_CLASS(xrtr); > + > + return xrc->end_notify(xrtr, eas); > +} > + > /* > * Encode the HW CAM line in the block group mode format : > * > @@ -1664,8 +1671,7 @@ static bool xive_router_end_es_notify(XiveRouter *xrtr, uint8_t end_blk, > * another chip. We don't model the PowerBus but the END trigger > * message has the same parameters than in the function below. > */ > -static void xive_router_end_notify(XiveRouter *xrtr, uint8_t end_blk, > - uint32_t end_idx, uint32_t end_data) > +void xive_router_end_notify(XiveRouter *xrtr, XiveEAS *eas) > { > XiveEND end; > uint8_t priority; > @@ -1675,6 +1681,10 @@ static void xive_router_end_notify(XiveRouter *xrtr, uint8_t end_blk, > XiveNVT nvt; > bool found; > > + uint8_t end_blk = xive_get_field64(EAS_END_BLOCK, eas->w); > + uint32_t end_idx = xive_get_field64(EAS_END_INDEX, eas->w); > + uint32_t end_data = xive_get_field64(EAS_END_DATA, eas->w); > + > /* END cache lookup */ > if (xive_router_get_end(xrtr, end_blk, end_idx, &end)) { > qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No END %x/%x\n", end_blk, > @@ -1817,10 +1827,7 @@ do_escalation: > /* > * The END trigger becomes an Escalation trigger > */ > - xive_router_end_notify(xrtr, > - xive_get_field32(END_W4_ESC_END_BLOCK, end.w4), > - xive_get_field32(END_W4_ESC_END_INDEX, end.w4), > - xive_get_field32(END_W5_ESC_END_DATA, end.w5)); > + xive_router_end_notify_handler(xrtr, (XiveEAS *) &end.w4); I didn't like the cast, but I can see why you're doing it this way. We should be fine as long as the notify handler is not testing the validity bit of the EAS structure. Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com> Fred > } > > void xive_router_notify(XiveNotifier *xn, uint32_t lisn, bool pq_checked) > @@ -1871,10 +1878,7 @@ void xive_router_notify(XiveNotifier *xn, uint32_t lisn, bool pq_checked) > /* > * The event trigger becomes an END trigger > */ > - xive_router_end_notify(xrtr, > - xive_get_field64(EAS_END_BLOCK, eas.w), > - xive_get_field64(EAS_END_INDEX, eas.w), > - xive_get_field64(EAS_END_DATA, eas.w)); > + xive_router_end_notify_handler(xrtr, &eas); > } > > static Property xive_router_properties[] = { > @@ -1887,12 +1891,16 @@ static void xive_router_class_init(ObjectClass *klass, void *data) > { > DeviceClass *dc = DEVICE_CLASS(klass); > XiveNotifierClass *xnc = XIVE_NOTIFIER_CLASS(klass); > + XiveRouterClass *xrc = XIVE_ROUTER_CLASS(klass); > > dc->desc = "XIVE Router Engine"; > device_class_set_props(dc, xive_router_properties); > /* Parent is SysBusDeviceClass. No need to call its realize hook */ > dc->realize = xive_router_realize; > xnc->notify = xive_router_notify; > + > + /* By default, the router handles END triggers locally */ > + xrc->end_notify = xive_router_end_notify; > } > > static const TypeInfo xive_router_info = {
On 8/31/23 09:50, Frederic Barrat wrote: > > > On 29/08/2023 16:32, Cédric Le Goater wrote: >> It will help us model the END triggers on the PowerNV machine, which >> can be rerouted to another interrupt controller. >> >> Signed-off-by: Cédric Le Goater <clg@kaod.org> >> --- > > > >> diff --git a/hw/intc/xive.c b/hw/intc/xive.c >> index 56670b2cac6e..df3ee0496fe7 100644 >> --- a/hw/intc/xive.c >> +++ b/hw/intc/xive.c >> @@ -1518,6 +1518,13 @@ static void xive_router_realize(DeviceState *dev, Error **errp) >> assert(xrtr->xfb); >> } >> +static void xive_router_end_notify_handler(XiveRouter *xrtr, XiveEAS *eas) >> +{ >> + XiveRouterClass *xrc = XIVE_ROUTER_GET_CLASS(xrtr); >> + >> + return xrc->end_notify(xrtr, eas); >> +} >> + >> /* >> * Encode the HW CAM line in the block group mode format : >> * >> @@ -1664,8 +1671,7 @@ static bool xive_router_end_es_notify(XiveRouter *xrtr, uint8_t end_blk, >> * another chip. We don't model the PowerBus but the END trigger >> * message has the same parameters than in the function below. >> */ >> -static void xive_router_end_notify(XiveRouter *xrtr, uint8_t end_blk, >> - uint32_t end_idx, uint32_t end_data) >> +void xive_router_end_notify(XiveRouter *xrtr, XiveEAS *eas) >> { >> XiveEND end; >> uint8_t priority; >> @@ -1675,6 +1681,10 @@ static void xive_router_end_notify(XiveRouter *xrtr, uint8_t end_blk, >> XiveNVT nvt; >> bool found; >> + uint8_t end_blk = xive_get_field64(EAS_END_BLOCK, eas->w); >> + uint32_t end_idx = xive_get_field64(EAS_END_INDEX, eas->w); >> + uint32_t end_data = xive_get_field64(EAS_END_DATA, eas->w); >> + >> /* END cache lookup */ >> if (xive_router_get_end(xrtr, end_blk, end_idx, &end)) { >> qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No END %x/%x\n", end_blk, >> @@ -1817,10 +1827,7 @@ do_escalation: >> /* >> * The END trigger becomes an Escalation trigger >> */ >> - xive_router_end_notify(xrtr, >> - xive_get_field32(END_W4_ESC_END_BLOCK, end.w4), >> - xive_get_field32(END_W4_ESC_END_INDEX, end.w4), >> - xive_get_field32(END_W5_ESC_END_DATA, end.w5)); >> + xive_router_end_notify_handler(xrtr, (XiveEAS *) &end.w4); > > > I didn't like the cast, but I can see why you're doing it this way. OPAL does a similar cast : https://github.com/open-power/skiboot/blob/master/hw/xive.c#L783 > We should be fine as long as the notify handler is not testing the validity bit of the EAS structure. Indeed. It doesn't seem to be set : XIVE[0] #0 END Escalation EAT 0000008e -Q end:00/008f data:00000000 0000008f -- end:01/003f data:0000008f 00000096 -Q end:00/0097 data:00000000 00000097 -- end:01/003f data:00000097 I don't remember to be honest. This is from a few years back. Ask the HW designer may be ? > Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com> Thanks, C. > > Fred > > >> } >> void xive_router_notify(XiveNotifier *xn, uint32_t lisn, bool pq_checked) >> @@ -1871,10 +1878,7 @@ void xive_router_notify(XiveNotifier *xn, uint32_t lisn, bool pq_checked) >> /* >> * The event trigger becomes an END trigger >> */ >> - xive_router_end_notify(xrtr, >> - xive_get_field64(EAS_END_BLOCK, eas.w), >> - xive_get_field64(EAS_END_INDEX, eas.w), >> - xive_get_field64(EAS_END_DATA, eas.w)); >> + xive_router_end_notify_handler(xrtr, &eas); >> } >> static Property xive_router_properties[] = { >> @@ -1887,12 +1891,16 @@ static void xive_router_class_init(ObjectClass *klass, void *data) >> { >> DeviceClass *dc = DEVICE_CLASS(klass); >> XiveNotifierClass *xnc = XIVE_NOTIFIER_CLASS(klass); >> + XiveRouterClass *xrc = XIVE_ROUTER_CLASS(klass); >> dc->desc = "XIVE Router Engine"; >> device_class_set_props(dc, xive_router_properties); >> /* Parent is SysBusDeviceClass. No need to call its realize hook */ >> dc->realize = xive_router_realize; >> xnc->notify = xive_router_notify; >> + >> + /* By default, the router handles END triggers locally */ >> + xrc->end_notify = xive_router_end_notify; >> } >> static const TypeInfo xive_router_info = {
diff --git a/include/hw/ppc/xive.h b/include/hw/ppc/xive.h index 9f580a2699e9..f120874e0ff1 100644 --- a/include/hw/ppc/xive.h +++ b/include/hw/ppc/xive.h @@ -401,6 +401,7 @@ struct XiveRouterClass { int (*write_nvt)(XiveRouter *xrtr, uint8_t nvt_blk, uint32_t nvt_idx, XiveNVT *nvt, uint8_t word_number); uint8_t (*get_block_id)(XiveRouter *xrtr); + void (*end_notify)(XiveRouter *xrtr, XiveEAS *eas); }; int xive_router_get_eas(XiveRouter *xrtr, uint8_t eas_blk, uint32_t eas_idx, @@ -414,6 +415,7 @@ int xive_router_get_nvt(XiveRouter *xrtr, uint8_t nvt_blk, uint32_t nvt_idx, int xive_router_write_nvt(XiveRouter *xrtr, uint8_t nvt_blk, uint32_t nvt_idx, XiveNVT *nvt, uint8_t word_number); void xive_router_notify(XiveNotifier *xn, uint32_t lisn, bool pq_checked); +void xive_router_end_notify(XiveRouter *xrtr, XiveEAS *eas); /* * XIVE Presenter diff --git a/hw/intc/xive.c b/hw/intc/xive.c index 56670b2cac6e..df3ee0496fe7 100644 --- a/hw/intc/xive.c +++ b/hw/intc/xive.c @@ -1518,6 +1518,13 @@ static void xive_router_realize(DeviceState *dev, Error **errp) assert(xrtr->xfb); } +static void xive_router_end_notify_handler(XiveRouter *xrtr, XiveEAS *eas) +{ + XiveRouterClass *xrc = XIVE_ROUTER_GET_CLASS(xrtr); + + return xrc->end_notify(xrtr, eas); +} + /* * Encode the HW CAM line in the block group mode format : * @@ -1664,8 +1671,7 @@ static bool xive_router_end_es_notify(XiveRouter *xrtr, uint8_t end_blk, * another chip. We don't model the PowerBus but the END trigger * message has the same parameters than in the function below. */ -static void xive_router_end_notify(XiveRouter *xrtr, uint8_t end_blk, - uint32_t end_idx, uint32_t end_data) +void xive_router_end_notify(XiveRouter *xrtr, XiveEAS *eas) { XiveEND end; uint8_t priority; @@ -1675,6 +1681,10 @@ static void xive_router_end_notify(XiveRouter *xrtr, uint8_t end_blk, XiveNVT nvt; bool found; + uint8_t end_blk = xive_get_field64(EAS_END_BLOCK, eas->w); + uint32_t end_idx = xive_get_field64(EAS_END_INDEX, eas->w); + uint32_t end_data = xive_get_field64(EAS_END_DATA, eas->w); + /* END cache lookup */ if (xive_router_get_end(xrtr, end_blk, end_idx, &end)) { qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No END %x/%x\n", end_blk, @@ -1817,10 +1827,7 @@ do_escalation: /* * The END trigger becomes an Escalation trigger */ - xive_router_end_notify(xrtr, - xive_get_field32(END_W4_ESC_END_BLOCK, end.w4), - xive_get_field32(END_W4_ESC_END_INDEX, end.w4), - xive_get_field32(END_W5_ESC_END_DATA, end.w5)); + xive_router_end_notify_handler(xrtr, (XiveEAS *) &end.w4); } void xive_router_notify(XiveNotifier *xn, uint32_t lisn, bool pq_checked) @@ -1871,10 +1878,7 @@ void xive_router_notify(XiveNotifier *xn, uint32_t lisn, bool pq_checked) /* * The event trigger becomes an END trigger */ - xive_router_end_notify(xrtr, - xive_get_field64(EAS_END_BLOCK, eas.w), - xive_get_field64(EAS_END_INDEX, eas.w), - xive_get_field64(EAS_END_DATA, eas.w)); + xive_router_end_notify_handler(xrtr, &eas); } static Property xive_router_properties[] = { @@ -1887,12 +1891,16 @@ static void xive_router_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); XiveNotifierClass *xnc = XIVE_NOTIFIER_CLASS(klass); + XiveRouterClass *xrc = XIVE_ROUTER_CLASS(klass); dc->desc = "XIVE Router Engine"; device_class_set_props(dc, xive_router_properties); /* Parent is SysBusDeviceClass. No need to call its realize hook */ dc->realize = xive_router_realize; xnc->notify = xive_router_notify; + + /* By default, the router handles END triggers locally */ + xrc->end_notify = xive_router_end_notify; } static const TypeInfo xive_router_info = {
It will help us model the END triggers on the PowerNV machine, which can be rerouted to another interrupt controller. Signed-off-by: Cédric Le Goater <clg@kaod.org> --- include/hw/ppc/xive.h | 2 ++ hw/intc/xive.c | 28 ++++++++++++++++++---------- 2 files changed, 20 insertions(+), 10 deletions(-)