[kvm-unit-tests PATCH] powerpc: Fix running the kvm-unit-tests with recent versions of QEMU

Starting with version 7.0, QEMU starts the pseries guests in 32-bit mode
instead of 64-bit (see QEMU commit 6e3f09c28a - "spapr: Force 32bit when
resetting a core"). This causes our test_64bit() in powerpc/emulator.c
to fail. Let's switch to 64-bit in our startup code instead to fix the
issue.

Signed-off-by: Thomas Huth <[email protected]>
---
 powerpc/cstart64.S | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/powerpc/cstart64.S b/powerpc/cstart64.S
index 972851f9..206c518f 100644
--- a/powerpc/cstart64.S
+++ b/powerpc/cstart64.S
@@ -23,6 +23,12 @@
 .globl start
 start:
 	FIXUP_ENDIAN
+	/* Switch to 64-bit mode */
+	mfmsr	r1
+	li	r2,1
+	sldi	r2,r2,63
+	or	r1,r1,r2
+	mtmsrd	r1
 	/*
 	 * We were loaded at QEMU's kernel load address, but we're not
 	 * allowed to link there due to how QEMU deals with linker VMAs,
-- 
2.31.1