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[PW_SID:1080416] [1/2] riscv/purgatory: return bool from verify_sha256_digest #1755

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[PW_SID:1080416] [1/2] riscv/purgatory: return bool from verify_sha256_digest #1755

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625701c
riscv/purgatory: return bool from verify_sha256_digest
toblux Apr 12, 2026
eedc15b
riscv/purgatory: add asm/purgatory.h
toblux Apr 12, 2026
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11 changes: 11 additions & 0 deletions arch/riscv/include/asm/purgatory.h
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Original file line number Diff line number Diff line change
@@ -0,0 +1,11 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_RISCV_PURGATORY_H
#define _ASM_RISCV_PURGATORY_H

#ifndef __ASSEMBLER__
#include <linux/purgatory.h>

extern void purgatory(void);
#endif /* __ASSEMBLER__ */

#endif /* _ASM_RISCV_PURGATORY_H */
14 changes: 5 additions & 9 deletions arch/riscv/purgatory/purgatory.c
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Original file line number Diff line number Diff line change
Expand Up @@ -8,16 +8,16 @@
*
*/

#include <linux/purgatory.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <asm/purgatory.h>
#include <asm/string.h>

u8 purgatory_sha256_digest[SHA256_DIGEST_SIZE] __section(".kexec-purgatory");

struct kexec_sha_region purgatory_sha_regions[KEXEC_SEGMENT_MAX] __section(".kexec-purgatory");

static int verify_sha256_digest(void)
static bool verify_sha256_digest(void)
{
struct kexec_sha_region *ptr, *end;
struct sha256_ctx sctx;
Expand All @@ -26,15 +26,11 @@ static int verify_sha256_digest(void)
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_update(&sctx, (const u8 *)(ptr->start), ptr->len);
sha256_final(&sctx, digest);
if (memcmp(digest, purgatory_sha256_digest, sizeof(digest)) != 0)
return 1;
return 0;
}

/* workaround for a warning with -Wmissing-prototypes */
void purgatory(void);
return memcmp(digest, purgatory_sha256_digest, sizeof(digest));
}

void purgatory(void)
{
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