On 08/27/24 at 01:24pm, Will Deacon wrote: > On Mon, Aug 26, 2024 at 02:52:02PM +0800, Kuan-Ying Lee wrote: > > Since arm64 supports 5-level page tables, we need to add this > > information to vmcoreinfo to make debug tools know if 5-level > > page table is enabled or not. > > > > Missing this information will break the debug tool like crash [1]. > > > > [1] https://github.com/crash-utility/crash > > > > Signed-off-by: Kuan-Ying Lee <kuan-ying.lee@xxxxxxxxxxxxx> > > --- > > Documentation/admin-guide/kdump/vmcoreinfo.rst | 6 ++++++ > > arch/arm64/kernel/vmcore_info.c | 3 +++ > > 2 files changed, 9 insertions(+) > > In which case, wouldn't you also want to know about pgtable_l4_enabled()? That is a good question. I guess it's deduced in code, mostly needed for different PAGE_OFFSET, how to transfer virtual addr to physical addr, etc. Add Crash utility experts here.
