add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/arch/x86/purgatory/purgatory.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * purgatory: Runs between two kernels
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  *
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@@ -5,38 +6,17 @@
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  *
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  * Author:
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  *       Vivek Goyal <vgoyal@redhat.com>
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- *
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- * This source code is licensed under the GNU General Public License,
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- * Version 2.  See the file COPYING for more details.
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  */
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 #include <linux/bug.h>
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-#include <linux/sha256.h>
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+#include <crypto/sha.h>
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 #include <asm/purgatory.h>
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 #include "../boot/string.h"
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-unsigned long purgatory_backup_dest __section(.kexec-purgatory);
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-unsigned long purgatory_backup_src __section(.kexec-purgatory);
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-unsigned long purgatory_backup_sz __section(.kexec-purgatory);
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+u8 purgatory_sha256_digest[SHA256_DIGEST_SIZE] __section(".kexec-purgatory");
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-u8 purgatory_sha256_digest[SHA256_DIGEST_SIZE] __section(.kexec-purgatory);
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-
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-struct kexec_sha_region purgatory_sha_regions[KEXEC_SEGMENT_MAX] __section(.kexec-purgatory);
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-
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-/*
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- * On x86, second kernel requries first 640K of memory to boot. Copy
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- * first 640K to a backup region in reserved memory range so that second
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- * kernel can use first 640K.
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- */
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-static int copy_backup_region(void)
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-{
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-	if (purgatory_backup_dest) {
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-		memcpy((void *)purgatory_backup_dest,
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-		       (void *)purgatory_backup_src, purgatory_backup_sz);
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-	}
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-	return 0;
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-}
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+struct kexec_sha_region purgatory_sha_regions[KEXEC_SEGMENT_MAX] __section(".kexec-purgatory");
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 static int verify_sha256_digest(void)
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 {
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@@ -68,7 +48,6 @@
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 		for (;;)
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 			;
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 	}
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-	copy_backup_region();
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 }
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 /*