[PATCH v3 14/14] hw/arm: Prefer cpu_isar_feature(aa64_mte) over property_find(tag-memory)

[Philippe Mathieu-Daudé]

The "tag-memory" property is added to ARMCPU when the
A64_MTE bit is set in the feature ID register. Rather
than checking whether the QOM property is present, directly
check the feature bit.

Since when ARM_FEATURE_AARCH64 is disabled the isar_aa64_mte
register is invalid, also check for it (see the 'aarch64'
variable set in the previous commit).

Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org>
---
 hw/arm/virt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index a43e87874c..7fd7173b5b 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -2188,7 +2188,7 @@ static void machvirt_init(MachineState *machine)
                  * The property exists only if MemTag is supported.
                  * If it is, we must allocate the ram to back that up.
                  */
-                if (!object_property_find(cpuobj, "tag-memory")) {
+                if (!aarch64 || !cpu_isar_feature(aa64_mte, ARM_CPU(cs))) {
                     error_report("MTE requested, but not supported "
                                  "by the guest CPU");
                     exit(1);
-- 
2.41.0