From 653beba24d4cd281b078eab48c9bce956939061c Mon Sep 17 00:00:00 2001 From: Philipp Rudo Date: Thu, 7 Mar 2019 15:56:34 +0100 Subject: s390/kexec_file: Load new kernel to absolute 0 The leading 64 kB of a kernel image doesn't contain any data needed to boot the new kernel when it was loaded via kexec_file. Thus kexec_file currently strips them off before loading the image. Keep the leading 64 kB in order to be able to pass a ipl_report to the next kernel. Signed-off-by: Philipp Rudo Signed-off-by: Martin Schwidefsky --- arch/s390/kernel/relocate_kernel.S | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/s390/kernel/relocate_kernel.S') diff --git a/arch/s390/kernel/relocate_kernel.S b/arch/s390/kernel/relocate_kernel.S index c97c2d40fe15..1b56f087ce2c 100644 --- a/arch/s390/kernel/relocate_kernel.S +++ b/arch/s390/kernel/relocate_kernel.S @@ -58,10 +58,13 @@ ENTRY(relocate_kernel) j .base .done: sgr %r0,%r0 # clear register r0 + cghi %r3,0 + je .diag la %r4,load_psw-.base(%r13) # load psw-address into the register o %r3,4(%r4) # or load address into psw st %r3,4(%r4) mvc 0(8,%r0),0(%r4) # copy psw to absolute address 0 + .diag: diag %r0,%r0,0x308 .align 8 -- cgit v1.2.3-55-g7522