Re: [PATCH] kdump, vmcoreinfo: Export sme_me_mask value to vmcoreinfo

From: Baoquan He
Date: Sat Oct 27 2018 - 07:09:09 EST

On 10/27/18 at 12:12pm, Borislav Petkov wrote:
> On Sat, Oct 27, 2018 at 05:39:17PM +0800, Baoquan He wrote:
> > Not very sure about this, we have arch_crash_save_vmcoreinfo() in
> > arch/x86/kernel/machine_kexec_64.c to export arch-specific stuffs
> > outside. Is there any special reason about a mask in one architecture
> > when expose it out?
> Yes, we don't export random arch-specific details to the outside which
> we then cannot change later. So vmcoreinfo needs to define its own.

OK, then it's fine to get the bit number, e.g calling
find_first_bit(sme_me_mask, BITS_PER_LONG), and export it to
vmcoreinfo. Thanks.