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| author | Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2019-02-03 23:37:20 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-04-29 11:47:10 +0300 |
| commit | b2d24b97b2a9691351920e700bfda4368c177232 (patch) | |
| tree | afc715c3029b79cf1430781ffcbe39ff0656cadb /arch/s390/boot/boot.h | |
| parent | a80313ff91abda67641dc33bed97f6bcc5e9f6a4 (diff) | |
| download | linux-b2d24b97b2a9691351920e700bfda4368c177232.tar.xz | |
s390/kernel: add support for kernel address space layout randomization (KASLR)
This patch adds support for relocating the kernel to a random address.
The random kernel offset is obtained from cpacf, using either TRNG, PRNO,
or KMC_PRNG, depending on supported MSA level.
KERNELOFFSET is added to vmcoreinfo, for crash --kaslr support.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Reviewed-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/boot/boot.h')
| -rw-r--r-- | arch/s390/boot/boot.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/boot/boot.h b/arch/s390/boot/boot.h index ca395fcff15e..ad57c2205a71 100644 --- a/arch/s390/boot/boot.h +++ b/arch/s390/boot/boot.h @@ -9,6 +9,9 @@ void setup_boot_command_line(void); void parse_boot_command_line(void); void setup_memory_end(void); void print_missing_facilities(void); +unsigned long get_random_base(unsigned long safe_addr); + +extern int kaslr_enabled; unsigned long read_ipl_report(unsigned long safe_offset); |