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s390/kexec_file: Create ipl report and pass to next kernel

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Signed-off-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Philipp Rudo 2019-03-18 12:53:47 +01:00 committed by Martin Schwidefsky
parent e23a8020ce
commit 99feaa717e
5 changed files with 86 additions and 9 deletions
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2
arch/s390/include/asm/ipl.h
View File

@ -36,6 +36,8 @@ struct ipl_parameter_block {
#define IPL_MAX_SUPPORTED_VERSION (0)
#define IPL_RB_CERT_UNKNOWN ((unsigned short)-1)
#define DIAG308_VMPARM_SIZE (64)
#define DIAG308_SCPDATA_OFFSET offsetof(struct ipl_parameter_block, \
fcp.scp_data)

2
arch/s390/include/asm/kexec.h
View File

@ -63,6 +63,8 @@ struct s390_load_data {
/* Total size of loaded segments in memory. Used as an offset. */
size_t memsz;
struct ipl_report *report;
};
int s390_verify_sig(const char *kernel, unsigned long kernel_len);

5
arch/s390/kernel/kexec_elf.c
View File

@ -10,6 +10,7 @@
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/kexec.h>
#include <asm/ipl.h>
#include <asm/setup.h>
static int kexec_file_add_kernel_elf(struct kimage *image,
@ -50,6 +51,10 @@ static int kexec_file_add_kernel_elf(struct kimage *image,
data->parm = buf.buffer + PARMAREA;
}
ipl_report_add_component(data->report, &buf,
IPL_RB_COMPONENT_FLAG_SIGNED |
IPL_RB_COMPONENT_FLAG_VERIFIED,
IPL_RB_CERT_UNKNOWN);
ret = kexec_add_buffer(&buf);
if (ret)
return ret;

5
arch/s390/kernel/kexec_image.c
View File

@ -10,6 +10,7 @@
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/kexec.h>
#include <asm/ipl.h>
#include <asm/setup.h>
static int kexec_file_add_kernel_image(struct kimage *image,
@ -32,6 +33,10 @@ static int kexec_file_add_kernel_image(struct kimage *image,
data->parm = image->kernel_buf + PARMAREA;
data->memsz += buf.memsz;
ipl_report_add_component(data->report, &buf,
IPL_RB_COMPONENT_FLAG_SIGNED |
IPL_RB_COMPONENT_FLAG_VERIFIED,
IPL_RB_CERT_UNKNOWN);
return kexec_add_buffer(&buf);
}

79
arch/s390/kernel/machine_kexec_file.c
View File

@ -12,6 +12,7 @@
#include <linux/kexec.h>
#include <linux/module.h>
#include <linux/verification.h>
#include <asm/boot_data.h>
#include <asm/ipl.h>
#include <asm/setup.h>
@ -150,9 +151,9 @@ static int kexec_file_add_purgatory(struct kimage *image,
ret = kexec_load_purgatory(image, &buf);
if (ret)
return ret;
data->memsz += buf.memsz;
ret = kexec_file_update_purgatory(image, data);
return ret;
return kexec_file_update_purgatory(image, data);
}
static int kexec_file_add_initrd(struct kimage *image,
@ -177,7 +178,60 @@ static int kexec_file_add_initrd(struct kimage *image,
data->memsz += buf.memsz;
ret = kexec_add_buffer(&buf);
if (ret)
return ret;
return ipl_report_add_component(data->report, &buf, 0, 0);
}
static int kexec_file_add_ipl_report(struct kimage *image,
struct s390_load_data *data)
{
__u32 *lc_ipl_parmblock_ptr;
unsigned int len, ncerts;
struct kexec_buf buf;
unsigned long addr;
void *ptr, *end;
buf.image = image;
data->memsz = ALIGN(data->memsz, PAGE_SIZE);
buf.mem = data->memsz;
if (image->type == KEXEC_TYPE_CRASH)
buf.mem += crashk_res.start;
ptr = (void *)ipl_cert_list_addr;
end = ptr + ipl_cert_list_size;
ncerts = 0;
while (ptr < end) {
ncerts++;
len = *(unsigned int *)ptr;
ptr += sizeof(len);
ptr += len;
}
addr = data->memsz + data->report->size;
addr += ncerts * sizeof(struct ipl_rb_certificate_entry);
ptr = (void *)ipl_cert_list_addr;
while (ptr < end) {
len = *(unsigned int *)ptr;
ptr += sizeof(len);
ipl_report_add_certificate(data->report, ptr, addr, len);
addr += len;
ptr += len;
}
buf.buffer = ipl_report_finish(data->report);
buf.bufsz = data->report->size;
buf.memsz = buf.bufsz;
data->memsz += buf.memsz;
lc_ipl_parmblock_ptr =
data->kernel_buf + offsetof(struct lowcore, ipl_parmblock_ptr);
*lc_ipl_parmblock_ptr = (__u32)buf.mem;
return kexec_add_buffer(&buf);
}
void *kexec_file_add_components(struct kimage *image,
@ -187,12 +241,18 @@ void *kexec_file_add_components(struct kimage *image,
struct s390_load_data data = {0};
int ret;
data.report = ipl_report_init(&ipl_block);
if (IS_ERR(data.report))
return data.report;
ret = add_kernel(image, &data);
if (ret)
return ERR_PTR(ret);
goto out;
if (image->cmdline_buf_len >= ARCH_COMMAND_LINE_SIZE)
return ERR_PTR(-EINVAL);
if (image->cmdline_buf_len >= ARCH_COMMAND_LINE_SIZE) {
ret = -EINVAL;
goto out;
}
memcpy(data.parm->command_line, image->cmdline_buf,
image->cmdline_buf_len);
@ -204,12 +264,12 @@ void *kexec_file_add_components(struct kimage *image,
if (image->initrd_buf) {
ret = kexec_file_add_initrd(image, &data);
if (ret)
return ERR_PTR(ret);
goto out;
}
ret = kexec_file_add_purgatory(image, &data);
if (ret)
return ERR_PTR(ret);
goto out;
if (data.kernel_mem == 0) {
unsigned long restart_psw = 0x0008000080000000UL;
@ -218,7 +278,10 @@ void *kexec_file_add_components(struct kimage *image,
image->start = 0;
}
return NULL;
ret = kexec_file_add_ipl_report(image, &data);
out:
ipl_report_free(data.report);
return ERR_PTR(ret);
}
int arch_kexec_apply_relocations_add(struct purgatory_info *pi,