diff options
Diffstat (limited to 'arch/s390/boot/startup.c')
| -rw-r--r-- | arch/s390/boot/startup.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/s390/boot/startup.c b/arch/s390/boot/startup.c index 474dee84d8a8..5aeac7564e67 100644 --- a/arch/s390/boot/startup.c +++ b/arch/s390/boot/startup.c @@ -1,12 +1,36 @@ // SPDX-License-Identifier: GPL-2.0 #include <linux/string.h> +#include <asm/setup.h> #include "compressed/decompressor.h" #include "boot.h" +#ifdef CONFIG_KERNEL_UNCOMPRESSED +unsigned long mem_safe_offset(void) +{ + return vmlinux.default_lma + vmlinux.image_size + vmlinux.bss_size; +} +#endif + +static void rescue_initrd(void) +{ + unsigned long min_initrd_addr; + + if (!IS_ENABLED(CONFIG_BLK_DEV_INITRD)) + return; + if (!INITRD_START || !INITRD_SIZE) + return; + min_initrd_addr = mem_safe_offset(); + if (min_initrd_addr <= INITRD_START) + return; + memmove((void *)min_initrd_addr, (void *)INITRD_START, INITRD_SIZE); + INITRD_START = min_initrd_addr; +} + void startup_kernel(void) { void *img; + rescue_initrd(); if (!IS_ENABLED(CONFIG_KERNEL_UNCOMPRESSED)) { img = decompress_kernel(); memmove((void *)vmlinux.default_lma, img, vmlinux.image_size); |