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| author | Vasily Gorbik <gor@linux.ibm.com> | 2017-11-17 18:44:28 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-10-09 11:21:24 +0200 |
| commit | d58106c3ec9abcf2f9882171d6230eccfd6dc52e (patch) | |
| tree | df49d5748482b08c2c96e17de5b58df20d21e3ec /arch/s390/kernel | |
| parent | s390/kasan: dynamic shadow mem allocation for modules (diff) | |
| download | linux-d58106c3ec9abcf2f9882171d6230eccfd6dc52e.tar.xz linux-d58106c3ec9abcf2f9882171d6230eccfd6dc52e.zip | |
s390/kasan: use noexec and large pages
To lower memory footprint and speed up kasan initialisation detect
EDAT availability and use large pages if possible. As we know how
much memory is needed for initialisation, another simplistic large
page allocator is introduced to avoid memory fragmentation.
Since facilities list is retrieved anyhow, detect noexec support and
adjust pages attributes. Handle noexec kernel option to avoid inconsistent
kasan shadow memory pages flags.
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/setup.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 93cf9bce98a1..d7548806d887 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -90,6 +90,7 @@ char elf_platform[ELF_PLATFORM_SIZE]; unsigned long int_hwcap = 0; +int __bootdata(noexec_disabled); int __bootdata(memory_end_set); unsigned long __bootdata(memory_end); unsigned long __bootdata(max_physmem_end); |