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[Qemu-devel] [PATCH 2/2] i386: "unavailable-features" QOM property
From: |
Eduardo Habkost |
Subject: |
[Qemu-devel] [PATCH 2/2] i386: "unavailable-features" QOM property |
Date: |
Mon, 22 Apr 2019 20:47:42 -0300 |
Add a "unavailable-features" QOM property to X86CPU objects that
have the same semantics of "unavailable-features" on
query-cpu-definitions. The new property has the same goal of
"filtered-features", but is generic enough to let any kind of CPU
feature to be listed there without relying on low level details
like CPUID leaves or MSR numbers.
Signed-off-by: Eduardo Habkost <address@hidden>
---
target/i386/cpu.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 23e55a9ef2..042d09a1bb 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -3640,6 +3640,17 @@ static void x86_cpu_list_feature_names(FeatureWordArray
features,
}
}
+static void x86_cpu_get_unavailable_features(Object *obj, Visitor *v,
+ const char *name, void *opaque,
+ Error **errp)
+{
+ X86CPU *xc = X86_CPU(obj);
+ strList *result = NULL;
+
+ x86_cpu_list_feature_names(xc->filtered_features, &result);
+ visit_type_strList(v, "unavailable-features", &result, errp);
+}
+
/* Check for missing features that may prevent the CPU class from
* running using the current machine and accelerator.
*/
@@ -5580,6 +5591,15 @@ static void x86_cpu_initfn(Object *obj)
object_property_add(obj, "filtered-features", "X86CPUFeatureWordInfo",
x86_cpu_get_feature_words,
NULL, NULL, (void *)cpu->filtered_features, NULL);
+ /*
+ * The "unavailable-features" property has the same semantics as
+ * CpuDefinitionInfo.unavailable-features on the "query-cpu-definitions"
+ * QMP command: they list the features that would have prevented the
+ * CPU from running if the "enforce" flag was set.
+ */
+ object_property_add(obj, "unavailable-features", "strList",
+ x86_cpu_get_unavailable_features,
+ NULL, NULL, NULL, &error_abort);
object_property_add(obj, "crash-information", "GuestPanicInformation",
x86_cpu_get_crash_info_qom, NULL, NULL, NULL, NULL);
--
2.18.0.rc1.1.g3f1ff2140