[Crash-utility] [PATCHv5 2/3] crash-utility/arm64: rename ARM64_PAGE_OFFSET_ACTUAL as ARM64_FLIP_PAGE_OFFSET_ACTUAL

[Pingfan Liu]

Renaming, so it is better to reflect the flip layout of kernel VA, which
is introduced by kernel commit 14c127c957c1 ("arm64: mm: Flip kernel VA space")

Signed-off-by: Pingfan Liu <piliu at redhat.com>
Cc: HAGIO KAZUHITO <k-hagio-ab at nec.com>
Cc: Lianbo Jiang <lijiang at redhat.com>
Cc: Bhupesh Sharma <bhupesh.sharma at linaro.org>
To: crash-utility at redhat.com
---
 arm64.c | 8 ++++----
 defs.h  | 3 ++-
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/arm64.c b/arm64.c
index 84addde..f1bac84 100644
--- a/arm64.c
+++ b/arm64.c
@@ -222,9 +222,9 @@ arm64_init(int when)
 		arm64_calc_KERNELPACMASK();
 		ms = machdep->machspec;
 		if (ms->VA_BITS_ACTUAL) {
-			ms->page_offset = ARM64_PAGE_OFFSET_ACTUAL;
-			machdep->identity_map_base = ARM64_PAGE_OFFSET_ACTUAL;
-			machdep->kvbase = ARM64_PAGE_OFFSET_ACTUAL;
+			ms->page_offset = ARM64_FLIP_PAGE_OFFSET_ACTUAL;
+			machdep->identity_map_base = ARM64_FLIP_PAGE_OFFSET_ACTUAL;
+			machdep->kvbase = ARM64_FLIP_PAGE_OFFSET_ACTUAL;
 			ms->userspace_top = ARM64_USERSPACE_TOP_ACTUAL;
 		} else {
 			ms->page_offset = ARM64_PAGE_OFFSET;
@@ -405,7 +405,7 @@ arm64_init(int when)
 				fprintf(fp, "CONFIG_ARM64_VA_BITS: %ld\n", ms->CONFIG_ARM64_VA_BITS);
 				fprintf(fp, "      VA_BITS_ACTUAL: %ld\n", ms->VA_BITS_ACTUAL);
 				fprintf(fp, "(calculated) VA_BITS: %ld\n", ms->VA_BITS);
-				fprintf(fp, " PAGE_OFFSET: %lx\n", ARM64_PAGE_OFFSET_ACTUAL);
+				fprintf(fp, " PAGE_OFFSET: %lx\n", ARM64_FLIP_PAGE_OFFSET_ACTUAL);
 				fprintf(fp, "    VA_START: %lx\n", ms->VA_START);
 				fprintf(fp, "     modules: %lx - %lx\n", ms->modules_vaddr, ms->modules_end);
 				fprintf(fp, "     vmalloc: %lx - %lx\n", ms->vmalloc_start_addr, ms->vmalloc_end);
diff --git a/defs.h b/defs.h
index 794b447..1007c69 100644
--- a/defs.h
+++ b/defs.h
@@ -3223,7 +3223,8 @@ typedef signed int s32;
 
 #define ARM64_PAGE_OFFSET    ((0xffffffffffffffffUL) \
 					<< (machdep->machspec->VA_BITS - 1))
-#define ARM64_PAGE_OFFSET_ACTUAL ((0xffffffffffffffffUL) \
+/* kernels > v5.4 the kernel VA space is flipped */
+#define ARM64_FLIP_PAGE_OFFSET_ACTUAL ((0xffffffffffffffffUL) \
 					- ((1UL) << machdep->machspec->VA_BITS_ACTUAL) + 1)
 
 #define ARM64_USERSPACE_TOP  ((1UL) << machdep->machspec->VA_BITS)
-- 
2.29.2