|
 |
c687bc |
From e4065c7739c8ea3f6f88898295ed899a1059806e Mon Sep 17 00:00:00 2001
|
|
|
c687bc |
From: Greg Kurz <gkurz@redhat.com>
|
|
|
c687bc |
Date: Fri, 4 Dec 2020 15:08:00 -0500
|
|
|
c687bc |
Subject: [PATCH 02/14] ppc/spapr: re-assert IRQs during event-scan if there
|
|
|
c687bc |
are pending
|
|
|
c687bc |
|
|
|
c687bc |
RH-Author: Greg Kurz <gkurz@redhat.com>
|
|
|
c687bc |
Message-id: <20201204150800.264829-3-gkurz@redhat.com>
|
|
|
c687bc |
Patchwork-id: 100216
|
|
|
c687bc |
O-Subject: [RHEL-8.4.0 qemu-kvm PATCH 2/2] ppc/spapr: re-assert IRQs during event-scan if there are pending
|
|
|
c687bc |
Bugzilla: 1901837
|
|
|
c687bc |
RH-Acked-by: Danilo de Paula <ddepaula@redhat.com>
|
|
|
c687bc |
RH-Acked-by: David Gibson <dgibson@redhat.com>
|
|
|
c687bc |
RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
|
|
|
c687bc |
|
|
|
c687bc |
From: Laurent Vivier <lvivier@redhat.com>
|
|
|
c687bc |
|
|
|
c687bc |
If we hotplug a CPU during the first second of the kernel boot,
|
|
|
c687bc |
the IRQ can be sent to the kernel while the RTAS event handler
|
|
|
c687bc |
is not installed. The event is queued, but the kernel doesn't
|
|
|
c687bc |
collect it and ignores the new CPU.
|
|
|
c687bc |
|
|
|
c687bc |
As the code relies on edge-triggered IRQ, we can re-assert it
|
|
|
c687bc |
during the event-scan RTAS call if there are still pending
|
|
|
c687bc |
events (as it is already done in check-exception).
|
|
|
c687bc |
|
|
|
c687bc |
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
|
|
|
c687bc |
Message-Id: <20201015210318.117386-1-lvivier@redhat.com>
|
|
|
c687bc |
Reviewed-by: Greg Kurz <groug@kaod.org>
|
|
|
c687bc |
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
|
|
|
c687bc |
(cherry picked from commit dff669d6a15fb92b063cb5aa691b4bb498727404)
|
|
|
c687bc |
Signed-off-by: Greg Kurz <gkurz@redhat.com>
|
|
|
c687bc |
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
|
|
|
c687bc |
---
|
|
|
c687bc |
hw/ppc/spapr_events.c | 12 ++++++++++++
|
|
|
c687bc |
1 file changed, 12 insertions(+)
|
|
|
c687bc |
|
|
|
c687bc |
diff --git a/hw/ppc/spapr_events.c b/hw/ppc/spapr_events.c
|
|
|
c687bc |
index e355e000d07..15b92b63adb 100644
|
|
|
c687bc |
--- a/hw/ppc/spapr_events.c
|
|
|
c687bc |
+++ b/hw/ppc/spapr_events.c
|
|
|
c687bc |
@@ -692,10 +692,22 @@ static void event_scan(PowerPCCPU *cpu, SpaprMachineState *spapr,
|
|
|
c687bc |
target_ulong args,
|
|
|
c687bc |
uint32_t nret, target_ulong rets)
|
|
|
c687bc |
{
|
|
|
c687bc |
+ int i;
|
|
|
c687bc |
if (nargs != 4 || nret != 1) {
|
|
|
c687bc |
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
|
|
|
c687bc |
return;
|
|
|
c687bc |
}
|
|
|
c687bc |
+
|
|
|
c687bc |
+ for (i = 0; i < EVENT_CLASS_MAX; i++) {
|
|
|
c687bc |
+ if (rtas_event_log_contains(EVENT_CLASS_MASK(i))) {
|
|
|
c687bc |
+ const SpaprEventSource *source =
|
|
|
c687bc |
+ spapr_event_sources_get_source(spapr->event_sources, i);
|
|
|
c687bc |
+
|
|
|
c687bc |
+ g_assert(source->enabled);
|
|
|
c687bc |
+ qemu_irq_pulse(spapr_qirq(spapr, source->irq));
|
|
|
c687bc |
+ }
|
|
|
c687bc |
+ }
|
|
|
c687bc |
+
|
|
|
c687bc |
rtas_st(rets, 0, RTAS_OUT_NO_ERRORS_FOUND);
|
|
|
c687bc |
}
|
|
|
c687bc |
|
|
|
c687bc |
--
|
|
|
c687bc |
2.27.0
|
|
|
c687bc |
|