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| author |   Alexander Egorenkov <egorenar@linux.ibm.com> | 2021-09-03 11:08:48 +0200 |
|---|---|---|
| committer |   Heiko Carstens <hca@linux.ibm.com> | 2022-04-25 13:54:12 +0200 |
| commit | 2ba24343bdb8637135bd0d9b5e249c44bd751670 (patch) | |
| tree | a2ab5eb17592f217dc2e23bf47b5eeeb54bcd564 /arch/s390/kernel/relocate_kernel.S | |
| parent | s390/sclp: add detection of IPL-complete-control facility (diff) | |
| download | linux-dev-2ba24343bdb8637135bd0d9b5e249c44bd751670.tar.xz linux-dev-2ba24343bdb8637135bd0d9b5e249c44bd751670.zip | |
s390/kexec: set end-of-ipl flag in last diag308 call
If the facility IPL-complete-control is present then the last diag308
call made by kexec shall set the end-of-ipl flag in the subcode register
to signal the hypervisor that this is the last diag308 call made by Linux.
Only the diag308 calls made during a regular kexec need to set
the end-of-ipl flag, in all other cases the hypervisor will ignore it.
Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390/kernel/relocate_kernel.S')
| -rw-r--r-- | arch/s390/kernel/relocate_kernel.S | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/kernel/relocate_kernel.S b/arch/s390/kernel/relocate_kernel.S index 9438368c3632..a9a1a6f45375 100644 --- a/arch/s390/kernel/relocate_kernel.S +++ b/arch/s390/kernel/relocate_kernel.S @@ -14,6 +14,7 @@ * moves the new kernel to its destination... * %r2 = pointer to first kimage_entry_t * %r3 = start address - where to jump to after the job is done... + * %r4 = subcode * * %r5 will be used as temp. storage * %r6 holds the destination address @@ -56,7 +57,7 @@ ENTRY(relocate_kernel) jo 0b j .base .done: - sgr %r0,%r0 # clear register r0 + lgr %r0,%r4 # subcode cghi %r3,0 je .diag la %r4,load_psw-.base(%r13) # load psw-address into the register |