Implement the capability to query available ID register values by
adding SYSREG_* options and values to the cpu model expansion for the
host model, if available.
Excerpt:
(QEMU) query-cpu-model-expansion type=full model={"name":"host"}
{"return": {"model": {"name": "host", "props":
{"SYSREG_ID_AA64PFR0_EL1_EL3": 1224979098931106066,
"SYSREG_ID_AA64ISAR2_EL1_CLRBHB": 0,
../..
So this allows the upper stack to detect available writable ID
regs and the "host passthrough model" values.
[CH: moved SYSREG_* values to host model]
Signed-off-by: Eric Auger <eric.au...@redhat.com>
Signed-off-by: Cornelia Huck <coh...@redhat.com>
---
TODO: Add the moment there is no way to test changing a given
ID reg field value. ie:
(QEMU) query-cpu-model-expansion type=full model={"name":"host",
"prop":{"SYSREG_ID_AA64ISAR0_EL1_DP":0x13}}
---
target/arm/arm-qmp-cmds.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/target/arm/arm-qmp-cmds.c b/target/arm/arm-qmp-cmds.c
index 883c0a0e8cce..5f48c7d835e1 100644
--- a/target/arm/arm-qmp-cmds.c
+++ b/target/arm/arm-qmp-cmds.c
@@ -21,6 +21,7 @@
*/
#include "qemu/osdep.h"
+#include "qemu/error-report.h"
#include "hw/boards.h"
#include "kvm_arm.h"
#include "qapi/error.h"
@@ -209,6 +210,24 @@ CpuModelExpansionInfo
*qmp_query_cpu_model_expansion(CpuModelExpansionType type,
}
}
+ /* If writable ID regs are supported, add them as well */
+ if (ARM_CPU(obj)->writable_id_regs == WRITABLE_ID_REGS_AVAIL) {
+ ObjectProperty *prop;
+ ObjectPropertyIterator iter;
+
+ object_property_iter_init(&iter, obj);
+
+ while ((prop = object_property_iter_next(&iter))) {
+ QObject *value;
+
+ if (!g_str_has_prefix(prop->name, "SYSREG_")) {
+ continue;
+ }
+ value = object_property_get_qobject(obj, prop->name, &error_abort);
+ qdict_put_obj(qdict_out, prop->name, value);
+ }
+ }
+
if (!qdict_size(qdict_out)) {
qobject_unref(qdict_out);
} else {
--
2.49.0
