The patch titled
Subject: kexec_file, arm64: print out debugging message if required
has been added to the -mm mm-unstable branch. Its filename is
kexec_file-arm64-print-out-debugging-message-if-required.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kexec_file-arm64-print-out-debugging-message-if-required.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Baoquan He <bhe@xxxxxxxxxx>
Subject: kexec_file, arm64: print out debugging message if required
Date: Wed, 13 Dec 2023 13:57:44 +0800
Then when specifying '-d' for kexec_file_load interface, loaded locations
of kernel/initrd/cmdline etc can be printed out to help debug.
Here replace pr_debug() with the newly added kexec_dprintk() in kexec_file
loading related codes.
And also remove the kimage->segment[] printing because the generic code
has done the printing.
Link: https://lkml.kernel.org/r/20231213055747.61826-5-bhe@xxxxxxxxxx
Signed-off-by: Baoquan He <bhe@xxxxxxxxxx>
Cc: Conor Dooley <conor@xxxxxxxxxx>
Cc: Joe Perches <joe@xxxxxxxxxxx>
Cc: Nathan Chancellor <nathan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm64/kernel/kexec_image.c | 6 ++---
arch/arm64/kernel/machine_kexec.c | 26 +++++------------------
arch/arm64/kernel/machine_kexec_file.c | 12 +++++-----
3 files changed, 15 insertions(+), 29 deletions(-)
--- a/arch/arm64/kernel/kexec_image.c~kexec_file-arm64-print-out-debugging-message-if-required
+++ a/arch/arm64/kernel/kexec_image.c
@@ -122,9 +122,9 @@ static void *image_load(struct kimage *i
kernel_segment->memsz -= text_offset;
image->start = kernel_segment->mem;
- pr_debug("Loaded kernel at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
- kernel_segment->mem, kbuf.bufsz,
- kernel_segment->memsz);
+ kexec_dprintk("Loaded kernel at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
+ kernel_segment->mem, kbuf.bufsz,
+ kernel_segment->memsz);
return NULL;
}
--- a/arch/arm64/kernel/machine_kexec.c~kexec_file-arm64-print-out-debugging-message-if-required
+++ a/arch/arm64/kernel/machine_kexec.c
@@ -32,26 +32,12 @@
static void _kexec_image_info(const char *func, int line,
const struct kimage *kimage)
{
- unsigned long i;
-
- pr_debug("%s:%d:\n", func, line);
- pr_debug(" kexec kimage info:\n");
- pr_debug(" type: %d\n", kimage->type);
- pr_debug(" start: %lx\n", kimage->start);
- pr_debug(" head: %lx\n", kimage->head);
- pr_debug(" nr_segments: %lu\n", kimage->nr_segments);
- pr_debug(" dtb_mem: %pa\n", &kimage->arch.dtb_mem);
- pr_debug(" kern_reloc: %pa\n", &kimage->arch.kern_reloc);
- pr_debug(" el2_vectors: %pa\n", &kimage->arch.el2_vectors);
-
- for (i = 0; i < kimage->nr_segments; i++) {
- pr_debug(" segment[%lu]: %016lx - %016lx, 0x%lx bytes, %lu pages\n",
- i,
- kimage->segment[i].mem,
- kimage->segment[i].mem + kimage->segment[i].memsz,
- kimage->segment[i].memsz,
- kimage->segment[i].memsz / PAGE_SIZE);
- }
+ kexec_dprintk("%s:%d:\n", func, line);
+ kexec_dprintk(" kexec kimage info:\n");
+ kexec_dprintk(" type: %d\n", kimage->type);
+ kexec_dprintk(" head: %lx\n", kimage->head);
+ kexec_dprintk(" kern_reloc: %pa\n", &kimage->arch.kern_reloc);
+ kexec_dprintk(" el2_vectors: %pa\n", &kimage->arch.el2_vectors);
}
void machine_kexec_cleanup(struct kimage *kimage)
--- a/arch/arm64/kernel/machine_kexec_file.c~kexec_file-arm64-print-out-debugging-message-if-required
+++ a/arch/arm64/kernel/machine_kexec_file.c
@@ -127,8 +127,8 @@ int load_other_segments(struct kimage *i
image->elf_load_addr = kbuf.mem;
image->elf_headers_sz = headers_sz;
- pr_debug("Loaded elf core header at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
- image->elf_load_addr, kbuf.bufsz, kbuf.memsz);
+ kexec_dprintk("Loaded elf core header at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
+ image->elf_load_addr, kbuf.bufsz, kbuf.memsz);
}
/* load initrd */
@@ -148,8 +148,8 @@ int load_other_segments(struct kimage *i
goto out_err;
initrd_load_addr = kbuf.mem;
- pr_debug("Loaded initrd at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
- initrd_load_addr, kbuf.bufsz, kbuf.memsz);
+ kexec_dprintk("Loaded initrd at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
+ initrd_load_addr, kbuf.bufsz, kbuf.memsz);
}
/* load dtb */
@@ -179,8 +179,8 @@ int load_other_segments(struct kimage *i
image->arch.dtb = dtb;
image->arch.dtb_mem = kbuf.mem;
- pr_debug("Loaded dtb at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
- kbuf.mem, kbuf.bufsz, kbuf.memsz);
+ kexec_dprintk("Loaded dtb at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
+ kbuf.mem, kbuf.bufsz, kbuf.memsz);
return 0;
_
Patches currently in -mm which might be from bhe@xxxxxxxxxx are
kexec_file-add-kexec_file-flag-to-control-debug-printing.patch
kexec_file-print-out-debugging-message-if-required.patch
kexec_file-x86-print-out-debugging-message-if-required.patch
kexec_file-arm64-print-out-debugging-message-if-required.patch
kexec_file-ricv-print-out-debugging-message-if-required.patch
kexec_file-power-print-out-debugging-message-if-required.patch
kexec_file-parisc-print-out-debugging-message-if-required.patch
riscv-kexec-fix-the-ifdeffery-for-aflags_kexec_relocateo.patch
