From b2d24b97b2a9691351920e700bfda4368c177232 Mon Sep 17 00:00:00 2001 From: Gerald Schaefer Date: Sun, 3 Feb 2019 21:37:20 +0100 Subject: 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 Reviewed-by: Philipp Rudo Signed-off-by: Martin Schwidefsky --- arch/s390/boot/boot.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/s390/boot/boot.h') 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); -- cgit v1.2.3