Re: [PATCH v5 31/32] x86: Add sysfs support for Secure Memory Encryption

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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...

Or?

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.



[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux