[PATCHv4 1/4] arm64: make phys_offset signed

[Pingfan Liu]

After kernel commit 7bc1a0f9e176 ("arm64: mm: use single quantity to
represent the PA to VA translation"), phys_offset can be negative if
running 52-bits kernel on 48-bits hardware.

So changing phys_offset from unsigned to signed.

Signed-off-by: Pingfan Liu <piliu at redhat.com>
Cc: Kairui Song <kasong at tencent.com>
Cc: Simon Horman <horms at verge.net.au>
Cc: Philipp Rudo <prudo at redhat.com>
To: kexec at lists.infradead.org
---
 kexec/arch/arm64/kexec-arm64.c | 12 ++++++------
 kexec/arch/arm64/kexec-arm64.h |  2 +-
 util_lib/elf_info.c            |  2 +-
 util_lib/include/elf_info.h    |  2 +-
 4 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/kexec/arch/arm64/kexec-arm64.c b/kexec/arch/arm64/kexec-arm64.c
index 6f572ed..c6c67e8 100644
--- a/kexec/arch/arm64/kexec-arm64.c
+++ b/kexec/arch/arm64/kexec-arm64.c
@@ -859,7 +859,7 @@ void add_segment(struct kexec_info *info, const void *buf, size_t bufsz,
 	add_segment_phys_virt(info, buf, bufsz, base, memsz, 1);
 }
 
-static inline void set_phys_offset(uint64_t v, char *set_method)
+static inline void set_phys_offset(int64_t v, char *set_method)
 {
 	if (arm64_mem.phys_offset == arm64_mem_ngv
 		|| v < arm64_mem.phys_offset) {
@@ -928,7 +928,7 @@ static int get_page_offset(void)
  * from VMCOREINFO note inside 'kcore'.
  */
 
-static int get_phys_offset_from_vmcoreinfo_pt_note(unsigned long *phys_offset)
+static int get_phys_offset_from_vmcoreinfo_pt_note(long *phys_offset)
 {
 	int fd, ret = 0;
 
@@ -948,7 +948,7 @@ static int get_phys_offset_from_vmcoreinfo_pt_note(unsigned long *phys_offset)
  * from PT_LOADs inside 'kcore'.
  */
 
-int get_phys_base_from_pt_load(unsigned long *phys_offset)
+int get_phys_base_from_pt_load(long *phys_offset)
 {
 	int i, fd, ret;
 	unsigned long long phys_start;
@@ -997,7 +997,7 @@ static bool to_be_excluded(char *str)
 int get_memory_ranges(struct memory_range **range, int *ranges,
 	unsigned long kexec_flags)
 {
-	unsigned long phys_offset = UINT64_MAX;
+	long phys_offset = -1;
 	FILE *fp;
 	const char *iomem = proc_iomem();
 	char line[MAX_LINE], *str;
@@ -1019,7 +1019,7 @@ int get_memory_ranges(struct memory_range **range, int *ranges,
 		 */
 		ret = get_phys_offset_from_vmcoreinfo_pt_note(&phys_offset);
 		if (!ret) {
-			if (phys_offset != UINT64_MAX)
+			if (phys_offset != -1)
 				set_phys_offset(phys_offset,
 						"vmcoreinfo pt_note");
 		} else {
@@ -1031,7 +1031,7 @@ int get_memory_ranges(struct memory_range **range, int *ranges,
 			 */
 			ret = get_phys_base_from_pt_load(&phys_offset);
 			if (!ret)
-				if (phys_offset != UINT64_MAX)
+				if (phys_offset != -1)
 					set_phys_offset(phys_offset,
 							"pt_load");
 		}
diff --git a/kexec/arch/arm64/kexec-arm64.h b/kexec/arch/arm64/kexec-arm64.h
index ed447ac..1844b67 100644
--- a/kexec/arch/arm64/kexec-arm64.h
+++ b/kexec/arch/arm64/kexec-arm64.h
@@ -58,7 +58,7 @@ extern off_t initrd_size;
  */
 
 struct arm64_mem {
-	uint64_t phys_offset;
+	long phys_offset;
 	uint64_t text_offset;
 	uint64_t image_size;
 	uint64_t vp_offset;
diff --git a/util_lib/elf_info.c b/util_lib/elf_info.c
index 51d8b92..5574c7f 100644
--- a/util_lib/elf_info.c
+++ b/util_lib/elf_info.c
@@ -1236,7 +1236,7 @@ int read_elf(int fd)
 	return 0;
 }
 
-int read_phys_offset_elf_kcore(int fd, unsigned long *phys_off)
+int read_phys_offset_elf_kcore(int fd, long *phys_off)
 {
 	int ret;
 
diff --git a/util_lib/include/elf_info.h b/util_lib/include/elf_info.h
index 4bc9279..f550d86 100644
--- a/util_lib/include/elf_info.h
+++ b/util_lib/include/elf_info.h
@@ -28,7 +28,7 @@ int get_pt_load(int idx,
 	unsigned long long *phys_end,
 	unsigned long long *virt_start,
 	unsigned long long *virt_end);
-int read_phys_offset_elf_kcore(int fd, unsigned long *phys_off);
+int read_phys_offset_elf_kcore(int fd, long *phys_off);
 int read_elf(int fd);
 void dump_dmesg(int fd, void (*handler)(char*, unsigned int));
 
-- 
2.31.1