diff options
| author | Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2019-04-01 19:10:45 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-04-10 17:47:09 +0200 |
| commit | bf9921a9c15bad089c08b94c300a6cafa035a612 (patch) | |
| tree | dd69b006096cdae6c93cb892d892b00dc7e63e68 /arch/s390/kernel | |
| parent | 46a984ffb86c8542fa510656fa8cb33befe8ee8f (diff) | |
s390: introduce .boot.preserved.data section
Introduce .boot.preserve.data section which is similar to .boot.data and
"shared" between the decompressor code and the decompressed kernel. The
decompressor will store values in it, and copy over to the decompressed
image before starting it. This method allows to avoid using pre-defined
addresses and other hacks to pass values between those boot phases.
Unlike .boot.data section .boot.preserved.data is NOT a part of init data,
and hence will be preserved for the kernel life time.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/vmlinux.lds.S | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S index 8429ab079715..6ef9c62bb01b 100644 --- a/arch/s390/kernel/vmlinux.lds.S +++ b/arch/s390/kernel/vmlinux.lds.S @@ -72,6 +72,7 @@ SECTIONS __end_ro_after_init = .; RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE) + BOOT_DATA_PRESERVED _edata = .; /* End of data section */ @@ -161,6 +162,9 @@ SECTIONS QUAD(__bss_stop - __bss_start) /* bss_size */ QUAD(__boot_data_start) /* bootdata_off */ QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */ + QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */ + QUAD(__boot_data_preserved_end - + __boot_data_preserved_start) /* bootdata_preserved_size */ } :NONE /* Debugging sections. */ |