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qemu-kvm/SOURCES/kvm-target-s390x-move-deprecated-props-to-CpuModelExpans.patch

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From 1142610383e66712cfa4d11cc02d7661f68d7193 Mon Sep 17 00:00:00 2001
From: Collin Walling <walling@linux.ibm.com>
Date: Fri, 26 Jul 2024 16:36:46 -0400
Subject: [PATCH 4/5] target/s390x: move @deprecated-props to CpuModelExpansion
Info
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Thomas Huth <thuth@redhat.com>
RH-MergeRequest: 449: Fix for live-migrating guests from IBM z16 to z17 host machines
RH-Jira: RHEL-88701
RH-Acked-by: Cédric Le Goater <clg@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [4/5] 2c66f3000c44742b02d1cd4b64e3d091b4be05cb
CpuModelInfo is used both as command argument and in command
returns.
Its @deprecated-props array does not make any sense in arguments,
and is silently ignored. We actually want it only as return value
of query-cpu-model-expansion.
Move it from CpuModelInfo to CpuModelExpansionType, and document
its dependence on expansion type property.
This was identified late during review [1] and we have to fix it up
while it's not part of an official QEMU release yet.
[1] https://lore.kernel.org/qemu-devel/20240719181741.35146-1-walling@linux.ibm.com/
Message-ID: <20240726203646.20279-1-walling@linux.ibm.com>
Fixes: eed0e8ffa38f ("target/s390x: filter deprecated properties based on model expansion type")
Signed-off-by: Collin Walling <walling@linux.ibm.com>
[ david: - add "Fixes", adjust description, reference v3 instead
- make property s390x-only and non-optional
- fixup "populate" vs. "populated" ]
Signed-off-by: David Hildenbrand <david@redhat.com>
(cherry picked from commit 442110bc6f3f308aedf884103fdba87ba906dfe7)
---
qapi/machine-target.json | 19 +++++++++++--------
target/s390x/cpu_models_sysemu.c | 29 ++++++++++++++++++-----------
2 files changed, 29 insertions(+), 19 deletions(-)
diff --git a/qapi/machine-target.json b/qapi/machine-target.json
index d32dc6958f..320688cd21 100644
--- a/qapi/machine-target.json
+++ b/qapi/machine-target.json
@@ -17,17 +17,11 @@
# @name: the name of the CPU definition the model is based on
# @props: a dictionary of QOM properties to be applied
#
-# @deprecated-props: a list of properties that are flagged as deprecated
-# by the CPU vendor. These properties are either a subset of the
-# properties enabled on the CPU model, or a set of properties
-# deprecated across all models for the architecture.
-#
# Since: 2.8
##
{ 'struct': 'CpuModelInfo',
'data': { 'name': 'str',
- '*props': 'any',
- '*deprecated-props': ['str'] } }
+ '*props': 'any' } }
##
# @CpuModelExpansionType:
@@ -215,10 +209,19 @@
#
# @model: the expanded CpuModelInfo.
#
+# @deprecated-props: a list of properties that are flagged as deprecated
+# by the CPU vendor. The list depends on the CpuModelExpansionType:
+# "static" properties are a subset of the enabled-properties for
+# the expanded model; "full" properties are a set of properties
+# that are deprecated across all models for the architecture.
+# (since: 9.1).
+#
# Since: 2.8
##
{ 'struct': 'CpuModelExpansionInfo',
- 'data': { 'model': 'CpuModelInfo' },
+ 'data': { 'model': 'CpuModelInfo',
+ 'deprecated-props' : { 'type': ['str'],
+ 'if': 'TARGET_S390X' } },
'if': { 'any': [ 'TARGET_S390X',
'TARGET_I386',
'TARGET_ARM' ] } }
diff --git a/target/s390x/cpu_models_sysemu.c b/target/s390x/cpu_models_sysemu.c
index edb81769cd..6680724bfe 100644
--- a/target/s390x/cpu_models_sysemu.c
+++ b/target/s390x/cpu_models_sysemu.c
@@ -183,15 +183,11 @@ static void cpu_info_from_model(CpuModelInfo *info, const S390CPUModel *model,
bool delta_changes)
{
QDict *qdict = qdict_new();
- S390FeatBitmap bitmap, deprecated;
+ S390FeatBitmap bitmap;
/* always fallback to the static base model */
info->name = g_strdup_printf("%s-base", model->def->name);
- /* features flagged as deprecated */
- bitmap_zero(deprecated, S390_FEAT_MAX);
- s390_get_deprecated_features(deprecated);
-
if (delta_changes) {
/* features deleted from the base feature set */
bitmap_andnot(bitmap, model->def->base_feat, model->features,
@@ -206,9 +202,6 @@ static void cpu_info_from_model(CpuModelInfo *info, const S390CPUModel *model,
if (!bitmap_empty(bitmap, S390_FEAT_MAX)) {
s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_enabled_feat);
}
-
- /* deprecated features that are a subset of the model's enabled features */
- bitmap_and(deprecated, deprecated, model->features, S390_FEAT_MAX);
} else {
/* expand all features */
s390_feat_bitmap_to_ascii(model->features, qdict,
@@ -223,9 +216,6 @@ static void cpu_info_from_model(CpuModelInfo *info, const S390CPUModel *model,
info->props = QOBJECT(qdict);
info->has_props = true;
}
-
- s390_feat_bitmap_to_ascii(deprecated, &info->deprecated_props, list_add_feat);
- info->has_deprecated_props = !!info->deprecated_props;
}
CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,
@@ -236,6 +226,7 @@ CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,
CpuModelExpansionInfo *expansion_info = NULL;
S390CPUModel s390_model;
bool delta_changes = false;
+ S390FeatBitmap deprecated_feats;
/* convert it to our internal representation */
cpu_model_from_info(&s390_model, model, &err);
@@ -255,6 +246,22 @@ CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,
expansion_info = g_new0(CpuModelExpansionInfo, 1);
expansion_info->model = g_malloc0(sizeof(*expansion_info->model));
cpu_info_from_model(expansion_info->model, &s390_model, delta_changes);
+
+ /* populate list of deprecated features */
+ bitmap_zero(deprecated_feats, S390_FEAT_MAX);
+ s390_get_deprecated_features(deprecated_feats);
+
+ if (delta_changes) {
+ /*
+ * Only populate deprecated features that are a
+ * subset of the features enabled on the CPU model.
+ */
+ bitmap_and(deprecated_feats, deprecated_feats,
+ s390_model.features, S390_FEAT_MAX);
+ }
+
+ s390_feat_bitmap_to_ascii(deprecated_feats,
+ &expansion_info->deprecated_props, list_add_feat);
return expansion_info;
}
--
2.48.1
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