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s390/kexec_file: Add crash support to image loader

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Add support to load a crash kernel to the image loader. This requires
extending the purgatory.

Signed-off-by: Philipp Rudo <prudo@linux.vnet.ibm.com>
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Philipp Rudo
2017-09-05 11:55:23 +02:00
committed by Martin Schwidefsky
parent e49bb0a27f
commit ee337f5469
4 changed files with 234 additions and 6 deletions
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6
arch/s390/kernel/kexec_image.c
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@@ -25,6 +25,8 @@ static int kexec_file_add_image_kernel(struct kimage *image,
buf.bufsz = kernel_len - STARTUP_NORMAL_OFFSET;
buf.mem = STARTUP_NORMAL_OFFSET;
if (image->type == KEXEC_TYPE_CRASH)
buf.mem += crashk_res.start;
buf.memsz = buf.bufsz;
ret = kexec_add_buffer(&buf);
@@ -43,10 +45,6 @@ static void *s390_image_load(struct kimage *image,
struct s390_load_data data = {0};
int ret;
/* We don't support crash kernels yet. */
if (image->type == KEXEC_TYPE_CRASH)
return ERR_PTR(-ENOTSUPP);
ret = kexec_file_add_image_kernel(image, &data, kernel, kernel_len);
if (ret)
return ERR_PTR(ret);