4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Helge Deller deller@gmx.de
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@gmx.de Fixes: 591d2108f3abc ("parisc: Add runtime check to prevent PA2.0 kernels on PA1.x machines") Cc: stable@vger.kernel.org # v6.0+ Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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