diff options
| author | Vasily Gorbik <gor@linux.ibm.com> | 2018-04-10 14:14:02 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-10-09 11:21:06 +0200 |
| commit | d1b52a4388ffdcff47fb53de7fffe052fe766a9f (patch) | |
| tree | 365847541f8313f4771223357ce68c2c945ea8fd /arch/s390/kernel | |
| parent | 7516fc11e44e73f1fcf8a3808dd88f82142e6585 (diff) | |
s390: introduce .boot.data section
Introduce .boot.data section which is "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.
.boot.data section is a part of init data, and will be freed after kernel
initialization is complete.
For uncompressed kernel image, .boot.data section is basically the same
as .init.data
Reviewed-by: Martin Schwidefsky <schwidefsky@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 | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S index 4c5358ff9e05..cc3cbdc93d35 100644 --- a/arch/s390/kernel/vmlinux.lds.S +++ b/arch/s390/kernel/vmlinux.lds.S @@ -16,6 +16,7 @@ #define RO_AFTER_INIT_DATA #include <asm-generic/vmlinux.lds.h> +#include <asm/vmlinux.lds.h> OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390") OUTPUT_ARCH(s390:64-bit) @@ -134,6 +135,8 @@ SECTIONS __nospec_return_end = . ; } + BOOT_DATA + /* early.c uses stsi, which requires page aligned data. */ . = ALIGN(PAGE_SIZE); INIT_DATA_SECTION(0x100) @@ -151,10 +154,12 @@ SECTIONS * it should match struct vmlinux_info */ .vmlinux.info 0 : { - QUAD(_stext) /* default_lma */ - QUAD(startup_continue) /* entry */ - QUAD(__bss_start - _stext) /* image_size */ - QUAD(__bss_stop - __bss_start) /* bss_size */ + QUAD(_stext) /* default_lma */ + QUAD(startup_continue) /* entry */ + QUAD(__bss_start - _stext) /* image_size */ + QUAD(__bss_stop - __bss_start) /* bss_size */ + QUAD(__boot_data_start) /* bootdata_off */ + QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */ } /* Debugging sections. */ |