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    Subject[PATCH v3 3/4] arm: Add kexec_image_info
    Date
    Add kexec_image_info to print detailed information about a kexec image.

    Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
    ---
    arch/arm/kernel/machine_kexec.c | 28 ++++++++++++++++++++++++++++
    1 file changed, 28 insertions(+)

    diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c
    index 5d84ad333f05..a0c229eec0b2 100644
    --- a/arch/arm/kernel/machine_kexec.c
    +++ b/arch/arm/kernel/machine_kexec.c
    @@ -29,6 +29,32 @@ extern unsigned long kexec_boot_atags;

    static atomic_t waiting_for_crash_ipi;

    +/**
    + * kexec_image_info - For debugging output.
    + */
    +#define kexec_image_info(_i) _kexec_image_info(__func__, __LINE__, _i)
    +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);
    +
    + for (i = 0; i < kimage->nr_segments; i++) {
    + pr_debug(" segment[%lu]: %08lx - %08lx, 0x%x 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);
    + }
    +}
    +
    /*
    * Provide a dummy crash_notes definition while crash dump arrives to arm.
    * This prevents breakage of crash_notes attribute in kernel/ksysfs.c.
    @@ -40,6 +66,8 @@ int machine_kexec_prepare(struct kimage *image)
    __be32 header;
    int i, err;

    + kexec_image_info(image);
    +
    image->arch.kernel_r2 = image->start - KEXEC_ARM_ZIMAGE_OFFSET
    + KEXEC_ARM_ATAGS_OFFSET;

    --
    2.26.2
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