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| author | Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2019-02-03 21:37:20 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-04-29 10:47:10 +0200 |
| commit | b2d24b97b2a9691351920e700bfda4368c177232 (patch) | |
| tree | afc715c3029b79cf1430781ffcbe39ff0656cadb /arch/s390/kernel/machine_kexec.c | |
| parent | a80313ff91abda67641dc33bed97f6bcc5e9f6a4 (diff) | |
| download | linux-b2d24b97b2a9691351920e700bfda4368c177232.tar.gz | |
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/kernel/machine_kexec.c')
| -rw-r--r-- | arch/s390/kernel/machine_kexec.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c index 4b998d639c32ef..e2ba7b7f574ef9 100644 --- a/arch/s390/kernel/machine_kexec.c +++ b/arch/s390/kernel/machine_kexec.c @@ -255,6 +255,7 @@ void arch_crash_save_vmcoreinfo(void) mem_assign_absolute(S390_lowcore.vmcore_info, paddr_vmcoreinfo_note()); vmcoreinfo_append_str("SDMA=%lx\n", __sdma); vmcoreinfo_append_str("EDMA=%lx\n", __edma); + vmcoreinfo_append_str("KERNELOFFSET=%lx\n", kaslr_offset()); } void machine_shutdown(void) |