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board_inspector: more verbose messages 

It is quite common to meet permissions errors when opening a specific
region of /dev/mem due to kernel configurations. This patch adds a bit more
logs on this for eaiser debugging.

Tracked-On: #6287
Signed-off-by: Junjie Mao <junjie.mao@intel.com>
This commit is contained in:
Junjie Mao 2021-07-27 13:07:21 +08:00 committed by wenlingz
parent 26021bd467
commit 879c6c11ca
1 changed files with 6 additions and 1 deletions
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7
misc/config_tools/board_inspector/acpiparser/aml/datatypes.py
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@ -310,7 +310,12 @@ class OperationRegion(Object):
logging.info(f"Open system memory space {name}: [{hex(offset)}, {hex(offset + length - 1)}]")
offset_page_aligned = (offset >> 12) << 12
length_page_aligned = ceil(((offset & 0xFFF) + length) / 0x1000) * 0x1000
mm = mmap.mmap(cls.devmem.fileno(), length_page_aligned, flags=mmap.MAP_PRIVATE, prot=mmap.PROT_READ, offset=offset_page_aligned)
try:
mm = mmap.mmap(cls.devmem.fileno(), length_page_aligned, flags=mmap.MAP_PRIVATE, prot=mmap.PROT_READ, offset=offset_page_aligned)
except PermissionError as e:
logging.warning(f"Do not have permission to access [{hex(offset_page_aligned)}, {hex(offset_page_aligned + length_page_aligned)}] by /dev/mem.")
logging.warning(f"You may need to add `iomem=relaxed` to the Linux kernel command line in your bootloader configuration file.")
raise
iobuf = StreamIOBuffer(mm, offset & 0xFFF, length)
return OperationRegion(iobuf)