1442ce8243
- kvm-trace-Clarify-DTrace-SystemTap-help-message.patch [bz#1516220] - kvm-socket-Add-backlog-parameter-to-socket_listen.patch [bz#1726898] - kvm-socket-Add-num-connections-to-qio_channel_socket_syn.patch [bz#1726898] - kvm-socket-Add-num-connections-to-qio_channel_socket_asy.patch [bz#1726898] - kvm-socket-Add-num-connections-to-qio_net_listener_open_.patch [bz#1726898] - kvm-multifd-Use-number-of-channels-as-listen-backlog.patch [bz#1726898] - kvm-pseries-Fix-compat_pvr-on-reset.patch [bz#1744107] - kvm-spapr-Set-compat-mode-in-spapr_core_plug.patch [bz#1744107] - Resolves: bz#1516220 (-trace help prints an incomplete list of trace events) - Resolves: bz#1726898 (Parallel migration fails with error "Unable to write to socket: Connection reset by peer" now and then) - Resolves: bz#1744107 (Migration from P8(qemu4.1) to P9(qemu4.1), after migration, qemu crash on destination with error message "qemu-kvm: error while loading state for instance 0x1 of device 'cpu'")
128 lines
4.8 KiB
Diff
128 lines
4.8 KiB
Diff
From 50cee68ce9dc31033969905cf0358d0f641d056a Mon Sep 17 00:00:00 2001
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From: Laurent Vivier <lvivier@redhat.com>
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Date: Wed, 4 Sep 2019 10:31:39 +0100
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Subject: [PATCH 8/8] spapr: Set compat mode in spapr_core_plug()
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RH-Author: Laurent Vivier <lvivier@redhat.com>
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Message-id: <20190904103139.29870-3-lvivier@redhat.com>
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Patchwork-id: 90276
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O-Subject: [RHEL-AV-8.1.0 qemu-kvm PATCH 2/2] spapr: Set compat mode in spapr_core_plug()
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Bugzilla: 1744107
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RH-Acked-by: John Snow <jsnow@redhat.com>
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RH-Acked-by: David Gibson <dgibson@redhat.com>
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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From: Greg Kurz <groug@kaod.org>
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A recent change in spapr_machine_reset() showed that resetting the compat
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mode in spapr_machine_reset() for the boot vCPU and in spapr_cpu_reset()
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for all other vCPUs was fragile. The fix was thus to reset the compat mode
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for all vCPUs in spapr_machine_reset(), but we still have to propagate
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it to hot-plugged CPUs. This is still performed from spapr_cpu_reset(),
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hence resulting in ppc_set_compat() being called twice for every vCPU at
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machine reset. Apart from wasting cycles, which isn't really an issue
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during machine reset, this seems to indicate that spapr_cpu_reset() isn't
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the best place to set the compat mode.
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A natural candidate for CPU-hotplug specific code is spapr_core_plug().
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Also, it sits in the same file as spapr_machine_reset() : this makes
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it easier for someone who wants to know when the compat PVR is set.
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Call ppc_set_compat() from there. This doesn't need to be done for
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initial vCPUs since the compat PVR is 0 and spapr_machine_reset() sets
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the appropriate value later. No need to do this on manually added vCPUS
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on the destination QEMU during migration since the compat PVR is
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part of the migrated vCPU state. Both conditions can be checked with
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spapr_drc_hotplugged().
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Signed-off-by: Greg Kurz <groug@kaod.org>
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Message-Id: <156701285312.499757.7807417667750711711.stgit@bahia.lan>
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Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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(cherry picked from commit b1e815674343a171e51ce447495957e289091e9f)
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Signed-off-by: Laurent Vivier <lvivier@redhat.com>
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BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1744107
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BRANCH: rhel-av-8.1.0/master-4.1.0
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UPSTREAM: Merged
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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hw/ppc/spapr.c | 24 ++++++++++++++++--------
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hw/ppc/spapr_cpu_core.c | 7 -------
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2 files changed, 16 insertions(+), 15 deletions(-)
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diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
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index 30bf7bb..41a6070 100644
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--- a/hw/ppc/spapr.c
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+++ b/hw/ppc/spapr.c
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@@ -1746,12 +1746,6 @@ static void spapr_machine_reset(MachineState *machine)
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spapr_ovec_cleanup(spapr->ov5_cas);
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spapr->ov5_cas = spapr_ovec_new();
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- /*
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- * reset compat_pvr for all CPUs
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- * as qemu_devices_reset() is called before this,
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- * it can't be propagated by spapr_cpu_reset()
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- * from the first CPU to all the others
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- */
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ppc_set_compat_all(spapr->max_compat_pvr, &error_fatal);
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}
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@@ -3826,6 +3820,7 @@ static void spapr_core_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
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CPUArchId *core_slot;
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int index;
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bool hotplugged = spapr_drc_hotplugged(dev);
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+ int i;
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core_slot = spapr_find_cpu_slot(MACHINE(hotplug_dev), cc->core_id, &index);
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if (!core_slot) {
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@@ -3859,13 +3854,26 @@ static void spapr_core_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
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core_slot->cpu = OBJECT(dev);
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if (smc->pre_2_10_has_unused_icps) {
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- int i;
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-
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for (i = 0; i < cc->nr_threads; i++) {
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cs = CPU(core->threads[i]);
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pre_2_10_vmstate_unregister_dummy_icp(cs->cpu_index);
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}
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}
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+
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+ /*
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+ * Set compatibility mode to match the boot CPU, which was either set
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+ * by the machine reset code or by CAS.
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+ */
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+ if (hotplugged) {
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+ for (i = 0; i < cc->nr_threads; i++) {
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+ ppc_set_compat(core->threads[i], POWERPC_CPU(first_cpu)->compat_pvr,
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+ &local_err);
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+ if (local_err) {
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+ error_propagate(errp, local_err);
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+ return;
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+ }
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+ }
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+ }
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}
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static void spapr_core_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
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diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
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index ae43c57..85f2746 100644
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--- a/hw/ppc/spapr_cpu_core.c
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+++ b/hw/ppc/spapr_cpu_core.c
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@@ -39,13 +39,6 @@ static void spapr_cpu_reset(void *opaque)
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* using an RTAS call */
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cs->halted = 1;
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- /* Set compatibility mode to match the boot CPU, which was either set
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- * by the machine reset code or by CAS. This should never fail.
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- * At startup the value is already set for all the CPUs
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- * but we need this when we hotplug a new CPU
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- */
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- ppc_set_compat(cpu, POWERPC_CPU(first_cpu)->compat_pvr, &error_abort);
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-
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env->spr[SPR_HIOR] = 0;
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lpcr = env->spr[SPR_LPCR];
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--
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1.8.3.1
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