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From 32a2cf9dfe251696b1d26b70723c5014e7ecbf45 Mon Sep 17 00:00:00 2001
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From: David Gibson <dgibson@redhat.com>
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Date: Wed, 4 Oct 2017 05:40:12 +0200
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Subject: [PATCH 05/34] hw/ppc: clear pending_events on machine reset
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RH-Author: David Gibson <dgibson@redhat.com>
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Message-id: <20171004054014.14159-3-dgibson@redhat.com>
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Patchwork-id: 76803
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O-Subject: [RHEL-7.5 qemu-kvm-rhev PATCH 2/4] hw/ppc: clear pending_events on machine reset
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Bugzilla: 1448344
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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From: Daniel Henrique Barboza <danielhb@linux.vnet.ibm.com>
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The sPAPR machine isn't clearing up the pending events QTAILQ on
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machine reboot. This allows for unprocessed hotplug/epow events
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to persist in the queue after reset and, when reasserting the IRQs in
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check_exception later on, these will be being processed by the OS.
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This patch implements a new function called 'spapr_clear_pending_events'
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that clears up the pending_events QTAILQ. This helper is then called
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inside ppc_spapr_reset to clear up the events queue, preventing
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old/deprecated events from persisting after a reset.
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Signed-off-by: Daniel Henrique Barboza <danielhb@linux.vnet.ibm.com>
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Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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(cherry picked from commit 56258174238eb25df629a53a96e1ac16a32dc7d4)
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Signed-off-by: David Gibson <dgibson@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/ppc/spapr.c | 1 +
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hw/ppc/spapr_events.c | 11 +++++++++++
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include/hw/ppc/spapr.h | 1 +
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3 files changed, 13 insertions(+)
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diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
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index 8d1cfcf..a419aa7 100644
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--- a/hw/ppc/spapr.c
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+++ b/hw/ppc/spapr.c
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@@ -1393,6 +1393,7 @@ static void ppc_spapr_reset(void)
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}
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qemu_devices_reset();
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+ spapr_clear_pending_events(spapr);
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/*
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* We place the device tree and RTAS just below either the top of the RMA,
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diff --git a/hw/ppc/spapr_events.c b/hw/ppc/spapr_events.c
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index f952b78..66b8164 100644
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--- a/hw/ppc/spapr_events.c
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+++ b/hw/ppc/spapr_events.c
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@@ -700,6 +700,17 @@ static void event_scan(PowerPCCPU *cpu, sPAPRMachineState *spapr,
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rtas_st(rets, 0, RTAS_OUT_NO_ERRORS_FOUND);
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}
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+void spapr_clear_pending_events(sPAPRMachineState *spapr)
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+{
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+ sPAPREventLogEntry *entry = NULL;
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+
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+ QTAILQ_FOREACH(entry, &spapr->pending_events, next) {
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+ QTAILQ_REMOVE(&spapr->pending_events, entry, next);
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+ g_free(entry->extended_log);
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+ g_free(entry);
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+ }
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+}
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+
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void spapr_events_init(sPAPRMachineState *spapr)
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{
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QTAILQ_INIT(&spapr->pending_events);
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diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
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index 2a303a7..5d161ec 100644
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--- a/include/hw/ppc/spapr.h
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+++ b/include/hw/ppc/spapr.h
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@@ -662,6 +662,7 @@ void spapr_cpu_parse_features(sPAPRMachineState *spapr);
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int spapr_hpt_shift_for_ramsize(uint64_t ramsize);
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void spapr_reallocate_hpt(sPAPRMachineState *spapr, int shift,
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Error **errp);
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+void spapr_clear_pending_events(sPAPRMachineState *spapr);
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/* CPU and LMB DRC release callbacks. */
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void spapr_core_release(DeviceState *dev);
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--
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1.8.3.1
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