[Crash-utility] [PATCH v9 1/4] crash-utility/arm64: rename ARM64_PAGE_OFFSET_ACTUAL as ARM64_FLIP_PAGE_OFFSET_ACTUAL

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(a)redhat.com&gt; Cc: HAGIO KAZUHITO <k-hagio-ab(a)nec.com&gt; Cc: Lianbo Jiang <lijiang(a)redhat.com&gt; Cc: Bhupesh Sharma <bhupesh.sharma(a)linaro.org&gt; To: crash-utility(a)redhat.com --- arm64.c | 10 ++++++---- defs.h | 3 ++- 2 files changed, 8 insertions(+), 5 deletions(-) diff --git a/arm64.c b/arm64.c index 8934961..9fe1a4a 100644 --- a/arm64.c +++ b/arm64.c @@ -217,10 +217,12 @@ arm64_init(int when) arm64_calc_VA_BITS(); arm64_calc_KERNELPACMASK(); ms = machdep->machspec; + + /* vabits_actual introduced after mm flip, so it should be flipped layout */ 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; @@ -401,7 +403,7 @@ 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 6bb00e2..af0dc8f 100644 --- a/defs.h +++ b/defs.h @@ -3232,7 +3232,8 @@ 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