arm64/mm/ptdump: Add address markers for BPF regions

Kernel virtual region [BPF_JIT_REGION_START..BPF_JIT_REGION_END] is missing
from address_markers[], hence relevant page table entries are not displayed
with /sys/kernel/debug/kernel_page_tables. This adds those missing markers.
While here, also rename arch/arm64/mm/dump.c which sounds bit ambiguous, as
arch/arm64/mm/ptdump.c instead.

Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Steven Price <steven.price@arm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Link: https://lore.kernel.org/r/1599208259-11191-1-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/arch/arm64/mm/Makefile b/arch/arm64/mm/Makefile
index d91030f..2a1d275 100644 (file)
--- a/arch/arm64/mm/Makefile
+++ b/arch/arm64/mm/Makefile
@@ -4,7 +4,7 @@ obj-y                           := dma-mapping.o extable.o fault.o init.o \
                                   ioremap.o mmap.o pgd.o mmu.o \
                                   context.o proc.o pageattr.o
 obj-$(CONFIG_HUGETLB_PAGE)     += hugetlbpage.o
-obj-$(CONFIG_PTDUMP_CORE)      += dump.o
+obj-$(CONFIG_PTDUMP_CORE)      += ptdump.o
 obj-$(CONFIG_PTDUMP_DEBUGFS)   += ptdump_debugfs.o
 obj-$(CONFIG_NUMA)             += numa.o
 obj-$(CONFIG_DEBUG_VIRTUAL)    += physaddr.o

diff --git a/arch/arm64/mm/dump.c b/arch/arm64/mm/ptdump.c
similarity index 99%
rename from arch/arm64/mm/dump.c
rename to arch/arm64/mm/ptdump.c
index 0b8da1c..265284d 100644 (file)
--- a/arch/arm64/mm/dump.c
+++ b/arch/arm64/mm/ptdump.c
@@ -41,6 +41,8 @@ static struct addr_marker address_markers[] = {
        { 0 /* KASAN_SHADOW_START */,   "Kasan shadow start" },
        { KASAN_SHADOW_END,             "Kasan shadow end" },
 #endif
+       { BPF_JIT_REGION_START,         "BPF start" },
+       { BPF_JIT_REGION_END,           "BPF end" },
        { MODULES_VADDR,                "Modules start" },
        { MODULES_END,                  "Modules end" },
        { VMALLOC_START,                "vmalloc() area" },