[PATCH] qemuarm64: maximise the emulated CPU capabilities

[ross.burton@arm.com]

From: Ross Burton <ross.burton@arm.com>

Instead of emulating a Cortex-A57, just ask qemu to emulate everything
it knows how to (apart from Pointer Authentication, where we use qemu's
implementation-defined algorithm which is vastly faster to emulate).

This does not change the tune, so the generated code is identical. The
advantage of doing this is that it lets us verify that features such as
Branch Target Indentification, which requires hardware support, is
actually functional.

Signed-off-by: Ross Burton <ross.burton@arm.com>
---
 meta/conf/machine/qemuarm64.conf | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meta/conf/machine/qemuarm64.conf b/meta/conf/machine/qemuarm64.conf
index a096d964db5..63af4cd346d 100644
--- a/meta/conf/machine/qemuarm64.conf
+++ b/meta/conf/machine/qemuarm64.conf
@@ -14,7 +14,7 @@ SERIAL_CONSOLES ?= "115200;ttyAMA0 115200;hvc0"
 # For runqemu
 QB_SYSTEM_NAME = "qemu-system-aarch64"
 QB_MACHINE = "-machine virt"
-QB_CPU = "-cpu cortex-a57"
+QB_CPU = "-cpu max,pauth-impdef=on"
 QB_SMP ?= "-smp 4"
 QB_CPU_KVM = "-cpu host -machine gic-version=3"
 # For graphics to work we need to define the VGA device as well as the necessary USB devices
-- 
2.34.1