meta-xilinx-core: layer.conf: Default to qemu for arm (32)

Normally we default to qemu-xlnx (the AMD/Xilinx QEMU fork).  However, this
fork depends on some functionality not present on 32-bit arm.  For on-target
qemu we need to use the stock QEMU instead.

Signed-off-by: Mark Hatle <mark.hatle@amd.com>

2 files changed, 8 insertions, 1 deletions

diff --git a/meta-xilinx-core/conf/layer.conf b/meta-xilinx-core/conf/layer.conf
index 5e1b5b5c..539688ff 100644
--- a/meta-xilinx-core/conf/layer.conf
+++ b/meta-xilinx-core/conf/layer.conf
@@ -54,7 +54,10 @@ PREFERRED_VERSION_qemu-xilinx ?= "${@d.getVarFlag('XILINX_QEMU_VERSION', d.getVa
 PREFERRED_VERSION_qemu-xilinx-native ?= "${@d.getVarFlag('XILINX_QEMU_VERSION', d.getVar('XILINX_RELEASE_VERSION')) or 'undefined'}"
 PREFERRED_VERSION_qemu-xilinx-system-native ?= "${@d.getVarFlag('XILINX_QEMU_VERSION', d.getVar('XILINX_RELEASE_VERSION')) or 'undefined'}"
 PREFERRED_VERSION_qemu-devicetrees ?= "xilinx-${XILINX_RELEASE_VERSION}%"
-PREFERRED_PROVIDER_qemu ?= "qemu-xilinx"
+
+DEFAULT_XILINX_QEMU = "qemu-xilinx"
+DEFAULT_XILINX_QEMU:arm = "qemu"
+PREFERRED_PROVIDER_qemu ?= "${DEFAULT_XILINX_QEMU}"
 
 XILINX_ATF_VERSION[v2023.1] = "2.8-xilinx-v2023.1%"
 XILINX_ATF_VERSION[v2023.2] = "2.8-xilinx-v2023.2%"
diff --git a/meta-xilinx-core/recipes-devtools/qemu/qemu-xilinx-7.1.inc b/meta-xilinx-core/recipes-devtools/qemu/qemu-xilinx-7.1.inc
index bf7ad610..6e98d15d 100644
--- a/meta-xilinx-core/recipes-devtools/qemu/qemu-xilinx-7.1.inc
+++ b/meta-xilinx-core/recipes-devtools/qemu/qemu-xilinx-7.1.inc
@@ -1,6 +1,10 @@
 SUMMARY = "Xilinx's fork of a fast open source processor emulator"
 HOMEPAGE = "https://github.com/xilinx/qemu/"
 
+# This qemu fork is NOT compatible with running on a 32-bit system
+# See: https://github.com/Xilinx/qemu/issues/35
+COMPATIBLE_HOST:arm = "null"
+
 # x86_64 is needed to build nativesdks
 QEMU_TARGETS = "aarch64 arm microblaze microblazeel x86_64"