diff options
author | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-05-10 07:19:23 -0400 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-05-10 07:19:23 -0400 |
commit | 71db1cd7ff4ea3b525ae7d9c97633ea281b7d981 (patch) | |
tree | 53ff3b8ecfc2869ec919e3423d69e07ddfaddd9a /arch/s390/purgatory/purgatory.c | |
parent | 7d95fb746c4eece67308f1642a666ea1ebdbd2cc (diff) | |
parent | 75bc37fefc4471e718ba8e651aa74673d4e0a9eb (diff) |
Merge tag 'v4.17-rc4' into patchwork
Linux 4.17-rc4
* tag 'v4.17-rc4': (920 commits)
Linux 4.17-rc4
KVM: x86: remove APIC Timer periodic/oneshot spikes
genksyms: fix typo in parse.tab.{c,h} generation rules
kbuild: replace hardcoded bison in cmd_bison_h with $(YACC)
gcc-plugins: fix build condition of SANCOV plugin
MAINTAINERS: Update Kbuild entry with a few paths
Revert "usb: host: ehci: Use dma_pool_zalloc()"
platform/x86: Kconfig: Fix dell-laptop dependency chain.
platform/x86: asus-wireless: Fix NULL pointer dereference
arm64: vgic-v2: Fix proxying of cpuif access
KVM: arm/arm64: vgic_init: Cleanup reference to process_maintenance
KVM: arm64: Fix order of vcpu_write_sys_reg() arguments
MAINTAINERS & files: Canonize the e-mails I use at files
media: imx-media-csi: Fix inconsistent IS_ERR and PTR_ERR
tools: power/acpi, revert to LD = gcc
bdi: Fix oops in wb_workfn()
RDMA/cma: Do not query GID during QP state transition to RTR
IB/mlx4: Fix integer overflow when calculating optimal MTT size
IB/hfi1: Fix memory leak in exception path in get_irq_affinity()
IB/{hfi1, rdmavt}: Fix memory leak in hfi1_alloc_devdata() upon failure
...
Diffstat (limited to 'arch/s390/purgatory/purgatory.c')
-rw-r--r-- | arch/s390/purgatory/purgatory.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/s390/purgatory/purgatory.c b/arch/s390/purgatory/purgatory.c new file mode 100644 index 000000000000..4e2beb3c29b7 --- /dev/null +++ b/arch/s390/purgatory/purgatory.c @@ -0,0 +1,42 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Purgatory code running between two kernels. + * + * Copyright IBM Corp. 2018 + * + * Author(s): Philipp Rudo <prudo@linux.vnet.ibm.com> + */ + +#include <linux/kexec.h> +#include <linux/sha256.h> +#include <linux/string.h> +#include <asm/purgatory.h> + +struct kexec_sha_region purgatory_sha_regions[KEXEC_SEGMENT_MAX]; +u8 purgatory_sha256_digest[SHA256_DIGEST_SIZE]; + +u64 kernel_entry; +u64 kernel_type; + +u64 crash_start; +u64 crash_size; + +int verify_sha256_digest(void) +{ + struct kexec_sha_region *ptr, *end; + u8 digest[SHA256_DIGEST_SIZE]; + struct sha256_state sctx; + + sha256_init(&sctx); + end = purgatory_sha_regions + ARRAY_SIZE(purgatory_sha_regions); + + for (ptr = purgatory_sha_regions; ptr < end; ptr++) + sha256_update(&sctx, (uint8_t *)(ptr->start), ptr->len); + + sha256_final(&sctx, digest); + + if (memcmp(digest, purgatory_sha256_digest, sizeof(digest))) + return 1; + + return 0; +} |