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| author |   Philipp Rudo <prudo@linux.ibm.com> | 2019-03-07 15:56:34 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-04-29 10:44:00 +0200 |
| commit | 653beba24d4cd281b078eab48c9bce956939061c (patch) | |
| tree | 666e391e3156330ba0f82d216408aae68bd9e2e6 /arch/s390/kernel/relocate_kernel.S | |
| parent | s390/kexec_file: Unify loader code (diff) | |
| download | linux-dev-653beba24d4cd281b078eab48c9bce956939061c.tar.xz linux-dev-653beba24d4cd281b078eab48c9bce956939061c.zip | |
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 <prudo@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to '')
| -rw-r--r-- | arch/s390/kernel/relocate_kernel.S | 3 |
1 files changed, 3 insertions, 0 deletions
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 |