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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/include/linux/crash_dump.h
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@@ -5,9 +5,10 @@
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 #include <linux/kexec.h>
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 #include <linux/proc_fs.h>
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 #include <linux/elf.h>
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+#include <linux/pgtable.h>
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 #include <uapi/linux/vmcore.h>
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-#include <asm/pgtable.h> /* for pgprot_t */
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+#include <linux/pgtable.h> /* for pgprot_t */
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 #ifdef CONFIG_CRASH_DUMP
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 #define ELFCORE_ADDR_MAX	(-1ULL)
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@@ -26,6 +27,10 @@
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 extern ssize_t copy_oldmem_page(unsigned long, char *, size_t,
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 						unsigned long, int);
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+extern ssize_t copy_oldmem_page_encrypted(unsigned long pfn, char *buf,
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+					  size_t csize, unsigned long offset,
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+					  int userbuf);
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+
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 void vmcore_cleanup(void);
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 /* Architecture code defines this if there are other possible ELF
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@@ -93,8 +98,6 @@
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 static inline bool is_kdump_kernel(void) { return 0; }
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 #endif /* CONFIG_CRASH_DUMP */
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-extern unsigned long saved_max_pfn;
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-
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 /* Device Dump information to be filled by drivers */
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 struct vmcoredd_data {
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 	char dump_name[VMCOREDD_MAX_NAME_BYTES]; /* Unique name of the dump */
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@@ -111,4 +114,18 @@
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 	return -EOPNOTSUPP;
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 }
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 #endif /* CONFIG_PROC_VMCORE_DEVICE_DUMP */
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+
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+#ifdef CONFIG_PROC_VMCORE
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+ssize_t read_from_oldmem(char *buf, size_t count,
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+			 u64 *ppos, int userbuf,
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+			 bool encrypted);
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+#else
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+static inline ssize_t read_from_oldmem(char *buf, size_t count,
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+				       u64 *ppos, int userbuf,
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+				       bool encrypted)
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+{
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+	return -EOPNOTSUPP;
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+}
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+#endif /* CONFIG_PROC_VMCORE */
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+
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 #endif /* LINUX_CRASHDUMP_H */