On 5/26/2017 12:04 AM, Xunlei Pang wrote:
On 05/26/2017 at 10:49 AM, Dave Young wrote:
Ccing Xunlei he is reading the patches see what need to be done for
kdump. There should still be several places to handle to make kdump work.
On 05/18/17 at 07:01pm, Borislav Petkov wrote:
On Tue, Apr 18, 2017 at 04:22:12PM -0500, Tom Lendacky wrote:
Add sysfs support for SME so that user-space utilities (kdump, etc.) can
determine if SME is active.
But why do user-space tools need to know that?
I mean, when we load the kdump kernel, we do it with the first kernel,
with the kexec_load() syscall, AFAICT. And that code does a lot of
things during that init, like machine_kexec_prepare()->init_pgtable() to
prepare the ident mapping of the second kernel, for example.
What I'm aiming at is that the first kernel knows *exactly* whether SME
is enabled or not and doesn't need to tell the second one through some
sysfs entries - it can do that during loading.
So I don't think we need any userspace things at all...
If kdump kernel can get the SME status from hardware register then this
should be not necessary and this patch can be dropped.
Yes, I also agree with dropping this one.
Consensus is to drop, so it will be.
Thanks,
Tom
Regards,
Xunlei
