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kexec_file, riscv: print out debugging message if required 

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 replace pr_notice() with kexec_dprintk() in elf_kexec_load()
because loaded location of purgatory and device tree are only printed out
for debugging, it doesn't make sense to always print them out.

And also remove kexec_image_info() because the content has been printed
out in generic code.

Link: https://lkml.kernel.org/r/20231213055747.61826-6-bhe@redhat.com
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Conor Dooley <conor@kernel.org>
Cc: Joe Perches <joe@perches.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Baoquan He 2023-12-13 13:57:45 +08:00 committed by Andrew Morton
parent 6f8c1da071
commit eb7622d908
2 changed files with 6 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
arch/riscv/kernel/elf_kexec.c
View File

@ -216,7 +216,6 @@ static void *elf_kexec_load(struct kimage *image, char *kernel_buf,
if (ret)
goto out;
kernel_start = image->start;
pr_notice("The entry point of kernel at 0x%lx\n", image->start);
/* Add the kernel binary to the image */
ret = riscv_kexec_elf_load(image, &ehdr, &elf_info,
@ -252,8 +251,8 @@ static void *elf_kexec_load(struct kimage *image, char *kernel_buf,
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);
/* Setup cmdline for kdump kernel case */
modified_cmdline = setup_kdump_cmdline(image, cmdline,
@ -275,6 +274,8 @@ static void *elf_kexec_load(struct kimage *image, char *kernel_buf,
pr_err("Error loading purgatory ret=%d\n", ret);
goto out;
}
kexec_dprintk("Loaded purgatory at 0x%lx\n", kbuf.mem);
ret = kexec_purgatory_get_set_symbol(image, "riscv_kernel_entry",
&kernel_start,
sizeof(kernel_start), 0);
@ -293,7 +294,7 @@ static void *elf_kexec_load(struct kimage *image, char *kernel_buf,
if (ret)
goto out;
initrd_pbase = kbuf.mem;
pr_notice("Loaded initrd at 0x%lx\n", initrd_pbase);
kexec_dprintk("Loaded initrd at 0x%lx\n", initrd_pbase);
}
/* Add the DTB to the image */
@ -318,7 +319,7 @@ static void *elf_kexec_load(struct kimage *image, char *kernel_buf,
}
/* Cache the fdt buffer address for memory cleanup */
image->arch.fdt = fdt;
pr_notice("Loaded device tree at 0x%lx\n", kbuf.mem);
kexec_dprintk("Loaded device tree at 0x%lx\n", kbuf.mem);
goto out;
out_free_fdt:

26
arch/riscv/kernel/machine_kexec.c
View File

@ -18,30 +18,6 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
/*
* kexec_image_info - Print received image details
*/
static void
kexec_image_info(const struct kimage *image)
{
unsigned long i;
pr_debug("Kexec image info:\n");
pr_debug("\ttype: %d\n", image->type);
pr_debug("\tstart: %lx\n", image->start);
pr_debug("\thead: %lx\n", image->head);
pr_debug("\tnr_segments: %lu\n", image->nr_segments);
for (i = 0; i < image->nr_segments; i++) {
pr_debug("\t segment[%lu]: %016lx - %016lx", i,
image->segment[i].mem,
image->segment[i].mem + image->segment[i].memsz);
pr_debug("\t\t0x%lx bytes, %lu pages\n",
(unsigned long) image->segment[i].memsz,
(unsigned long) image->segment[i].memsz / PAGE_SIZE);
}
}
/*
* machine_kexec_prepare - Initialize kexec
*
@ -60,8 +36,6 @@ machine_kexec_prepare(struct kimage *image)
unsigned int control_code_buffer_sz = 0;
int i = 0;
kexec_image_info(image);
/* Find the Flattened Device Tree and save its physical address */
for (i = 0; i < image->nr_segments; i++) {
if (image->segment[i].memsz <= sizeof(fdt))