5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Helge Deller <deller@xxxxxx>
commit a406b8b424fa01f244c1aab02ba186258448c36b upstream.
Bail out early with error message when trying to boot a 64-bit kernel on
32-bit machines. This fixes the previous commit to include the check for
true 64-bit kernels as well.
Signed-off-by: Helge Deller <deller@xxxxxx>
Fixes: 591d2108f3abc ("parisc: Add runtime check to prevent PA2.0 kernels on PA1.x machines")
Cc: <stable@xxxxxxxxxxxxxxx> # v6.0+
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/parisc/kernel/head.S | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
--- a/arch/parisc/kernel/head.S
+++ b/arch/parisc/kernel/head.S
@@ -69,9 +69,8 @@ $bss_loop:
stw,ma %arg2,4(%r1)
stw,ma %arg3,4(%r1)
-#if !defined(CONFIG_64BIT) && defined(CONFIG_PA20)
- /* This 32-bit kernel was compiled for PA2.0 CPUs. Check current CPU
- * and halt kernel if we detect a PA1.x CPU. */
+#if defined(CONFIG_PA20)
+ /* check for 64-bit capable CPU as required by current kernel */
ldi 32,%r10
mtctl %r10,%cr11
.level 2.0
