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Re: [Part1 PATCH v5 02/17] x86/mm: Add Secure Encrypted Virtualization (SEV) support

From Borislav Petkov <bp@suse.de>
Newsgroups linux.kernel
Subject Re: [Part1 PATCH v5 02/17] x86/mm: Add Secure Encrypted Virtualization (SEV) support
Date 2017-09-29 16:50 +0200
Message-ID <uv4M2-7tm-33@gated-at.bofh.it> (permalink)
References (1 earlier) <uuCZt-743-35@gated-at.bofh.it> <uuCZt-743-33@gated-at.bofh.it> <uuMFr-4zB-15@gated-at.bofh.it> <uuMFr-4zB-13@gated-at.bofh.it> <uv4M2-7tm-35@gated-at.bofh.it>
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On Fri, Sep 29, 2017 at 07:28:47AM -0500, Brijesh Singh wrote:
> if we are adding a chicken bits then I think we should do it for both
> "smeonly" and "sevonly". We can boot host OS with SME disabled and SEV
> enabled, and still be able to create the SEV guest from the hypervisor.

Sure, but is that a real use case? I mean, who would want to run
encrypted guests on an unencrypted hypervisor?

> How about this ?
> 
> mem_encrypt=on     both SME and SEV enabled
> mem_encrypt=sev    only SEV enabled
> mem_encrypt=sme   only SME enabled
> mem_encrypt=off     neither SME/SEV are enabled

I like those short mnemonics, ACK. Less typing is always good.

Thx.

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
-- 

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Thread

Re: [Part1 PATCH v5 02/17] x86/mm: Add Secure Encrypted  Virtualization (SEV) support Borislav Petkov <bp@suse.de> - 2017-09-28 11:10 +0200
  Re: [Part1 PATCH v5 02/17] x86/mm: Add Secure Encrypted  Virtualization (SEV) support Borislav Petkov <bp@suse.de> - 2017-09-28 21:30 +0200
    Re: [Part1 PATCH v5 02/17] x86/mm: Add Secure Encrypted  Virtualization (SEV) support Borislav Petkov <bp@suse.de> - 2017-09-29 16:50 +0200
      Re: [Part1 PATCH v5 02/17] x86/mm: Add Secure Encrypted  Virtualization (SEV) support Borislav Petkov <bp@suse.de> - 2017-09-29 18:00 +0200
  Re: [Part1 PATCH v5.1 02/17] x86/mm: Add Secure Encrypted  Virtualization (SEV) support Borislav Petkov <bp@suse.de> - 2017-09-30 11:00 +0200
  [PATCH] x86/CPU/AMD, mm: Extend with mem_encrypt=sme option Borislav Petkov <bp@suse.de> - 2017-09-30 14:00 +0200
    Re: [PATCH] x86/CPU/AMD, mm: Extend with mem_encrypt=sme option Borislav Petkov <bp@suse.de> - 2017-09-30 23:50 +0200
      Re: [PATCH] x86/CPU/AMD, mm: Extend with mem_encrypt=sme option Borislav Petkov <bp@suse.de> - 2017-10-01 19:20 +0200
        Re: [PATCH] x86/CPU/AMD, mm: Extend with mem_encrypt=sme option Borislav Petkov <bp@suse.de> - 2017-10-02 00:10 +0200
          Re: [PATCH] x86/CPU/AMD, mm: Extend with mem_encrypt=sme option Borislav Petkov <bp@suse.de> - 2017-10-02 14:50 +0200

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