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arm64, crash: wrap crash dumping code into crash related ifdefs

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Now crash codes under kernel/ folder has been split out from kexec
code, crash dumping can be separated from kexec reboot in config
items on arm64 with some adjustments.

Here wrap up crash dumping codes with CONFIG_CRASH_DUMP ifdeffery.

[bhe@redhat.com: fix building error in generic codes]
  Link: https://lkml.kernel.org/r/20240129135033.157195-2-bhe@redhat.com
Link: https://lkml.kernel.org/r/20240124051254.67105-8-bhe@redhat.com
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Hari Bathini <hbathini@linux.ibm.com>
Cc: Pingfan Liu <piliu@redhat.com>
Cc: Klara Modin <klarasmodin@gmail.com>
Cc: Michael Kelley <mhklinux@outlook.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Baoquan He 2024-01-24 13:12:47 +08:00 committed by Andrew Morton
parent a4eeb2176d
commit 40254101d8
6 changed files with 15 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm64/include/asm/kexec.h
View File

@ -80,7 +80,7 @@ static inline void crash_setup_regs(struct pt_regs *newregs,
}
}
#if defined(CONFIG_KEXEC_CORE) && defined(CONFIG_HIBERNATION)
#if defined(CONFIG_CRASH_DUMP) && defined(CONFIG_HIBERNATION)
extern bool crash_is_nosave(unsigned long pfn);
extern void crash_prepare_suspend(void);
extern void crash_post_resume(void);

2
arch/arm64/kernel/machine_kexec.c
View File

@ -255,7 +255,7 @@ void machine_crash_shutdown(struct pt_regs *regs)
pr_info("Starting crashdump kernel...\n");
}
#ifdef CONFIG_HIBERNATION
#if defined(CONFIG_CRASH_DUMP) && defined(CONFIG_HIBERNATION)
/*
* To preserve the crash dump kernel image, the relevant memory segments
* should be mapped again around the hibernation.

10
arch/arm64/kernel/machine_kexec_file.c
View File

@ -39,6 +39,7 @@ int arch_kimage_file_post_load_cleanup(struct kimage *image)
return kexec_image_post_load_cleanup_default(image);
}
#ifdef CONFIG_CRASH_DUMP
static int prepare_elf_headers(void **addr, unsigned long *sz)
{
struct crash_mem *cmem;
@ -80,6 +81,7 @@ static int prepare_elf_headers(void **addr, unsigned long *sz)
kfree(cmem);
return ret;
}
#endif
/*
* Tries to add the initrd and DTB to the image. If it is not possible to find
@ -93,8 +95,8 @@ int load_other_segments(struct kimage *image,
char *cmdline)
{
struct kexec_buf kbuf;
void *headers, *dtb = NULL;
unsigned long headers_sz, initrd_load_addr = 0, dtb_len,
void *dtb = NULL;
unsigned long initrd_load_addr = 0, dtb_len,
orig_segments = image->nr_segments;
int ret = 0;
@ -102,7 +104,10 @@ int load_other_segments(struct kimage *image,
/* not allocate anything below the kernel */
kbuf.buf_min = kernel_load_addr + kernel_size;
#ifdef CONFIG_CRASH_DUMP
/* load elf core header */
void *headers;
unsigned long headers_sz;
if (image->type == KEXEC_TYPE_CRASH) {
ret = prepare_elf_headers(&headers, &headers_sz);
if (ret) {
@ -130,6 +135,7 @@ int load_other_segments(struct kimage *image,
kexec_dprintk("Loaded elf core header at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
image->elf_load_addr, kbuf.bufsz, kbuf.memsz);
}
#endif
/* load initrd */
if (initrd) {

2
arch/arm64/mm/init.c
View File

@ -100,7 +100,7 @@ static void __init arch_reserve_crashkernel(void)
bool high = false;
int ret;
if (!IS_ENABLED(CONFIG_KEXEC_CORE))
if (!IS_ENABLED(CONFIG_CRASH_RESERVE))
return;
ret = parse_crashkernel(cmdline, memblock_phys_mem_size(),

2
drivers/of/kexec.c
View File

@ -395,6 +395,7 @@ void *of_kexec_alloc_and_setup_fdt(const struct kimage *image,
if (ret)
goto out;
#ifdef CONFIG_CRASH_DUMP
/* add linux,usable-memory-range */
ret = fdt_appendprop_addrrange(fdt, 0, chosen_node,
"linux,usable-memory-range", crashk_res.start,
@ -410,6 +411,7 @@ void *of_kexec_alloc_and_setup_fdt(const struct kimage *image,
if (ret)
goto out;
}
#endif
}
/* add bootargs */

2
kernel/kexec_file.c
View File

@ -540,8 +540,10 @@ static int kexec_walk_memblock(struct kexec_buf *kbuf,
phys_addr_t mstart, mend;
struct resource res = { };
#ifdef CONFIG_CRASH_DUMP
if (kbuf->image->type == KEXEC_TYPE_CRASH)
return func(&crashk_res, kbuf);
#endif
/*
* Using MEMBLOCK_NONE will properly skip MEMBLOCK_DRIVER_MANAGED. See