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s390/kexec_file: Unify loader code
s390_image_load and s390_elf_load have the same code to load the different components. Combine this functionality in one shared function. While at it move kexec_file_update_kernel into the new function as well. Signed-off-by: Philipp Rudo <prudo@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
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d0d249d75d
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8e49642613
4 changed files with 58 additions and 84 deletions
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@ -59,13 +59,9 @@ struct s390_load_data {
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size_t memsz;
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size_t memsz;
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};
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};
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int kexec_file_add_purgatory(struct kimage *image,
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void *kexec_file_add_components(struct kimage *image,
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struct s390_load_data *data);
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int (*add_kernel)(struct kimage *image,
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int kexec_file_add_initrd(struct kimage *image,
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struct s390_load_data *data));
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struct s390_load_data *data,
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char *initrd, unsigned long initrd_len);
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int *kexec_file_update_kernel(struct kimage *iamge,
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struct s390_load_data *data);
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extern const struct kexec_file_ops s390_kexec_image_ops;
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extern const struct kexec_file_ops s390_kexec_image_ops;
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extern const struct kexec_file_ops s390_kexec_elf_ops;
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extern const struct kexec_file_ops s390_kexec_elf_ops;
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@ -12,16 +12,17 @@
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#include <linux/kexec.h>
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#include <linux/kexec.h>
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#include <asm/setup.h>
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#include <asm/setup.h>
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static int kexec_file_add_elf_kernel(struct kimage *image,
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static int kexec_file_add_kernel_elf(struct kimage *image,
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struct s390_load_data *data,
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struct s390_load_data *data)
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char *kernel, unsigned long kernel_len)
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{
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{
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struct kexec_buf buf;
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struct kexec_buf buf;
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const Elf_Ehdr *ehdr;
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const Elf_Ehdr *ehdr;
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const Elf_Phdr *phdr;
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const Elf_Phdr *phdr;
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Elf_Addr entry;
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Elf_Addr entry;
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void *kernel;
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int i, ret;
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int i, ret;
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kernel = image->kernel_buf;
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ehdr = (Elf_Ehdr *)kernel;
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ehdr = (Elf_Ehdr *)kernel;
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buf.image = image;
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buf.image = image;
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if (image->type == KEXEC_TYPE_CRASH)
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if (image->type == KEXEC_TYPE_CRASH)
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@ -62,7 +63,7 @@ static int kexec_file_add_elf_kernel(struct kimage *image,
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data->memsz = ALIGN(data->memsz, phdr->p_align) + buf.memsz;
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data->memsz = ALIGN(data->memsz, phdr->p_align) + buf.memsz;
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}
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}
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return 0;
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return data->memsz ? 0 : -EINVAL;
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}
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}
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static void *s390_elf_load(struct kimage *image,
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static void *s390_elf_load(struct kimage *image,
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@ -70,11 +71,10 @@ static void *s390_elf_load(struct kimage *image,
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char *initrd, unsigned long initrd_len,
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char *initrd, unsigned long initrd_len,
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char *cmdline, unsigned long cmdline_len)
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char *cmdline, unsigned long cmdline_len)
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{
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{
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struct s390_load_data data = {0};
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const Elf_Ehdr *ehdr;
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const Elf_Ehdr *ehdr;
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const Elf_Phdr *phdr;
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const Elf_Phdr *phdr;
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size_t size;
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size_t size;
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int i, ret;
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int i;
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/* image->fobs->probe already checked for valid ELF magic number. */
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/* image->fobs->probe already checked for valid ELF magic number. */
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ehdr = (Elf_Ehdr *)kernel;
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ehdr = (Elf_Ehdr *)kernel;
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@ -107,24 +107,7 @@ static void *s390_elf_load(struct kimage *image,
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if (size > kernel_len)
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if (size > kernel_len)
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return ERR_PTR(-EINVAL);
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return ERR_PTR(-EINVAL);
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ret = kexec_file_add_elf_kernel(image, &data, kernel, kernel_len);
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return kexec_file_add_components(image, kexec_file_add_kernel_elf);
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if (ret)
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return ERR_PTR(ret);
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if (!data.memsz)
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return ERR_PTR(-EINVAL);
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if (initrd) {
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ret = kexec_file_add_initrd(image, &data, initrd, initrd_len);
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if (ret)
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return ERR_PTR(ret);
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}
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ret = kexec_file_add_purgatory(image, &data);
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if (ret)
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return ERR_PTR(ret);
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return kexec_file_update_kernel(image, &data);
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}
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}
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static int s390_elf_probe(const char *buf, unsigned long len)
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static int s390_elf_probe(const char *buf, unsigned long len)
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@ -12,30 +12,26 @@
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#include <linux/kexec.h>
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#include <linux/kexec.h>
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#include <asm/setup.h>
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#include <asm/setup.h>
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static int kexec_file_add_image_kernel(struct kimage *image,
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static int kexec_file_add_kernel_image(struct kimage *image,
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struct s390_load_data *data,
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struct s390_load_data *data)
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char *kernel, unsigned long kernel_len)
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{
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{
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struct kexec_buf buf;
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struct kexec_buf buf;
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int ret;
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buf.image = image;
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buf.image = image;
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buf.buffer = kernel + STARTUP_NORMAL_OFFSET;
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buf.buffer = image->kernel_buf + STARTUP_NORMAL_OFFSET;
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buf.bufsz = kernel_len - STARTUP_NORMAL_OFFSET;
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buf.bufsz = image->kernel_buf_len - STARTUP_NORMAL_OFFSET;
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buf.mem = STARTUP_NORMAL_OFFSET;
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buf.mem = STARTUP_NORMAL_OFFSET;
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if (image->type == KEXEC_TYPE_CRASH)
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if (image->type == KEXEC_TYPE_CRASH)
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buf.mem += crashk_res.start;
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buf.mem += crashk_res.start;
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buf.memsz = buf.bufsz;
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buf.memsz = buf.bufsz;
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ret = kexec_add_buffer(&buf);
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data->kernel_buf = image->kernel_buf;
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data->parm = image->kernel_buf + PARMAREA;
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data->kernel_buf = kernel;
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data->parm = (void *)kernel + PARMAREA;
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data->memsz += buf.memsz + STARTUP_NORMAL_OFFSET;
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data->memsz += buf.memsz + STARTUP_NORMAL_OFFSET;
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return ret;
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return kexec_add_buffer(&buf);
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}
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}
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static void *s390_image_load(struct kimage *image,
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static void *s390_image_load(struct kimage *image,
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@ -43,24 +39,7 @@ static void *s390_image_load(struct kimage *image,
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char *initrd, unsigned long initrd_len,
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char *initrd, unsigned long initrd_len,
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char *cmdline, unsigned long cmdline_len)
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char *cmdline, unsigned long cmdline_len)
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{
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{
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struct s390_load_data data = {0};
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return kexec_file_add_components(image, kexec_file_add_kernel_image);
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int ret;
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ret = kexec_file_add_image_kernel(image, &data, kernel, kernel_len);
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if (ret)
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return ERR_PTR(ret);
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if (initrd) {
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ret = kexec_file_add_initrd(image, &data, initrd, initrd_len);
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if (ret)
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return ERR_PTR(ret);
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}
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ret = kexec_file_add_purgatory(image, &data);
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if (ret)
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return ERR_PTR(ret);
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return kexec_file_update_kernel(image, &data);
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}
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}
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static int s390_image_probe(const char *buf, unsigned long len)
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static int s390_image_probe(const char *buf, unsigned long len)
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@ -17,25 +17,6 @@ const struct kexec_file_ops * const kexec_file_loaders[] = {
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NULL,
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NULL,
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};
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};
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int *kexec_file_update_kernel(struct kimage *image,
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struct s390_load_data *data)
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{
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unsigned long *loc;
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if (image->cmdline_buf_len >= ARCH_COMMAND_LINE_SIZE)
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return ERR_PTR(-EINVAL);
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memcpy(data->parm->command_line, image->cmdline_buf,
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image->cmdline_buf_len);
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if (image->type == KEXEC_TYPE_CRASH) {
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data->parm->oldmem_base = crashk_res.start;
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data->parm->oldmem_size = crashk_res.end - crashk_res.start + 1;
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}
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return NULL;
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}
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static int kexec_file_update_purgatory(struct kimage *image)
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static int kexec_file_update_purgatory(struct kimage *image)
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{
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{
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u64 entry, type;
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u64 entry, type;
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@ -78,7 +59,8 @@ static int kexec_file_update_purgatory(struct kimage *image)
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return ret;
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return ret;
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}
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}
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int kexec_file_add_purgatory(struct kimage *image, struct s390_load_data *data)
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static int kexec_file_add_purgatory(struct kimage *image,
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struct s390_load_data *data)
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{
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{
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struct kexec_buf buf;
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struct kexec_buf buf;
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int ret;
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int ret;
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@ -98,16 +80,16 @@ int kexec_file_add_purgatory(struct kimage *image, struct s390_load_data *data)
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return ret;
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return ret;
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}
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}
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int kexec_file_add_initrd(struct kimage *image, struct s390_load_data *data,
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static int kexec_file_add_initrd(struct kimage *image,
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char *initrd, unsigned long initrd_len)
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struct s390_load_data *data)
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{
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{
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struct kexec_buf buf;
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struct kexec_buf buf;
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int ret;
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int ret;
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buf.image = image;
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buf.image = image;
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buf.buffer = initrd;
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buf.buffer = image->initrd_buf;
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buf.bufsz = initrd_len;
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buf.bufsz = image->initrd_buf_len;
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data->memsz = ALIGN(data->memsz, PAGE_SIZE);
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data->memsz = ALIGN(data->memsz, PAGE_SIZE);
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buf.mem = data->memsz;
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buf.mem = data->memsz;
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@ -123,6 +105,40 @@ int kexec_file_add_initrd(struct kimage *image, struct s390_load_data *data,
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return ret;
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return ret;
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}
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}
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void *kexec_file_add_components(struct kimage *image,
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int (*add_kernel)(struct kimage *image,
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struct s390_load_data *data))
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{
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struct s390_load_data data = {0};
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int ret;
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ret = add_kernel(image, &data);
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if (ret)
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return ERR_PTR(ret);
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if (image->cmdline_buf_len >= ARCH_COMMAND_LINE_SIZE)
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return ERR_PTR(-EINVAL);
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memcpy(data.parm->command_line, image->cmdline_buf,
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image->cmdline_buf_len);
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if (image->type == KEXEC_TYPE_CRASH) {
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data.parm->oldmem_base = crashk_res.start;
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data.parm->oldmem_size = crashk_res.end - crashk_res.start + 1;
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}
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if (image->initrd_buf) {
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ret = kexec_file_add_initrd(image, &data);
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if (ret)
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return ERR_PTR(ret);
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}
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ret = kexec_file_add_purgatory(image, &data);
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if (ret)
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return ERR_PTR(ret);
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return NULL;
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}
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int arch_kexec_apply_relocations_add(struct purgatory_info *pi,
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int arch_kexec_apply_relocations_add(struct purgatory_info *pi,
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Elf_Shdr *section,
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Elf_Shdr *section,
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const Elf_Shdr *relsec,
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const Elf_Shdr *relsec,
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