linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Andy Lutomirski <luto@kernel.org>
To: Joerg Roedel <jroedel@suse.de>
Cc: Yu Zhang <yu.c.zhang@linux.intel.com>,
	David Hildenbrand <david@redhat.com>,
	Sean Christopherson <seanjc@google.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
	kvm list <kvm@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Borislav Petkov <bp@alien8.de>,
	Andrew Morton <akpm@linux-foundation.org>,
	Andi Kleen <ak@linux.intel.com>,
	David Rientjes <rientjes@google.com>,
	Vlastimil Babka <vbabka@suse.cz>,
	Tom Lendacky <thomas.lendacky@amd.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	"Peter Zijlstra (Intel)" <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	Varad Gautam <varad.gautam@suse.com>,
	Dario Faggioli <dfaggioli@suse.com>,
	the arch/x86 maintainers <x86@kernel.org>,
	linux-mm@kvack.org, linux-coco@lists.linux.dev,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	"Kirill A . Shutemov" <kirill@shutemov.name>,
	Sathyanarayanan Kuppuswamy 
	<sathyanarayanan.kuppuswamy@linux.intel.com>,
	Dave Hansen <dave.hansen@intel.com>
Subject: Re: [RFC] KVM: mm: fd-based approach for supporting KVM guest private memory
Date: Thu, 2 Sep 2021 11:41:53 -0700	[thread overview]
Message-ID: <b10b09b0-d5ea-b72a-106a-4e1b0df4dc66@kernel.org> (raw)
In-Reply-To: <YTCZAjdci5yx+n6l@suse.de>

On 9/2/21 2:27 AM, Joerg Roedel wrote:
> On Wed, Sep 01, 2021 at 09:07:59AM -0700, Andy Lutomirski wrote:
>> In principle, you could actually initialize a TDX guest with all of its
>> memory shared and all of it mapped in the host IOMMU.
> 
> Not sure how this works in TDX, but in SEV code fetches are always
> treated as encrypted. So this approach would not work with SEV, not to
> speak about attestation, which will not work with this approach either
> :)
> 

Oof.

  reply	other threads:[~2021-09-02 18:42 UTC|newest]

Thread overview: 71+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-24  0:52 [RFC] KVM: mm: fd-based approach for supporting KVM guest private memory Sean Christopherson
2021-08-24 10:48 ` Yu Zhang
2021-08-26  0:35   ` Sean Christopherson
2021-08-26 13:23     ` Yu Zhang
2021-08-26 10:15 ` David Hildenbrand
2021-08-26 17:05   ` Andy Lutomirski
2021-08-26 21:26     ` David Hildenbrand
2021-08-27 18:24       ` Andy Lutomirski
2021-08-27 22:28         ` Sean Christopherson
2021-08-31 19:12           ` David Hildenbrand
2021-08-31 20:45             ` Sean Christopherson
2021-09-01  7:51               ` David Hildenbrand
2021-08-27  2:31   ` Yu Zhang
2021-08-31 19:08     ` David Hildenbrand
2021-08-31 20:01       ` Andi Kleen
2021-08-31 20:15         ` David Hildenbrand
2021-08-31 20:39           ` Andi Kleen
2021-09-01  3:34             ` Yu Zhang
2021-09-01  4:53     ` Andy Lutomirski
2021-09-01  7:12       ` Tian, Kevin
2021-09-01 10:24       ` Yu Zhang
2021-09-01 16:07         ` Andy Lutomirski
2021-09-01 16:27           ` David Hildenbrand
2021-09-02  8:34             ` Yu Zhang
2021-09-02  8:44               ` David Hildenbrand
2021-09-02 11:02                 ` Yu Zhang
2021-09-02  8:19           ` Yu Zhang
2021-09-02 18:41             ` Andy Lutomirski
2021-09-07  1:33             ` Yan Zhao
2021-09-02  9:27           ` Joerg Roedel
2021-09-02 18:41             ` Andy Lutomirski [this message]
2021-09-02 18:57               ` Sean Christopherson
2021-09-02 19:07                 ` Dave Hansen
2021-09-02 20:42                   ` Andy Lutomirski
2021-08-27 22:18   ` Sean Christopherson
2021-08-31 19:07     ` David Hildenbrand
2021-08-31 21:54       ` Sean Christopherson
2021-09-01  8:09         ` David Hildenbrand
2021-09-01 15:54           ` Andy Lutomirski
2021-09-01 16:16             ` David Hildenbrand
2021-09-01 17:09               ` Andy Lutomirski
2021-09-01 16:18             ` James Bottomley
2021-09-01 16:22               ` David Hildenbrand
2021-09-01 16:31                 ` James Bottomley
2021-09-01 16:37                   ` David Hildenbrand
2021-09-01 16:45                     ` James Bottomley
2021-09-01 17:08                       ` David Hildenbrand
2021-09-01 17:50                         ` Sean Christopherson
2021-09-01 17:53                           ` David Hildenbrand
2021-09-01 17:08               ` Andy Lutomirski
2021-09-01 17:13                 ` James Bottomley
2021-09-02 10:18                 ` Joerg Roedel
2021-09-01 18:24               ` Andy Lutomirski
2021-09-01 19:26               ` Dave Hansen
2021-09-07 15:00               ` Tom Lendacky
2021-09-01  4:58       ` Andy Lutomirski
2021-09-01  7:49         ` David Hildenbrand
2021-09-02 18:47 ` Kirill A. Shutemov
2021-09-02 20:33   ` Sean Christopherson
2021-09-03 19:14     ` Kirill A. Shutemov
2021-09-03 19:15       ` Andy Lutomirski
2021-09-10 17:18         ` Kirill A. Shutemov
2021-09-15 19:58           ` Chao Peng
2021-09-15 13:51             ` David Hildenbrand
2021-09-15 14:29               ` Kirill A. Shutemov
2021-09-15 14:59                 ` David Hildenbrand
2021-09-15 15:35                   ` David Hildenbrand
2021-09-15 20:04                   ` Kirill A. Shutemov
2021-09-15 14:11             ` Kirill A. Shutemov
2021-09-16  7:36               ` Chao Peng
2021-09-16  9:24               ` Paolo Bonzini

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=b10b09b0-d5ea-b72a-106a-4e1b0df4dc66@kernel.org \
    --to=luto@kernel.org \
    --cc=ak@linux.intel.com \
    --cc=akpm@linux-foundation.org \
    --cc=bp@alien8.de \
    --cc=dave.hansen@intel.com \
    --cc=david@redhat.com \
    --cc=dfaggioli@suse.com \
    --cc=jmattson@google.com \
    --cc=joro@8bytes.org \
    --cc=jroedel@suse.de \
    --cc=kirill.shutemov@linux.intel.com \
    --cc=kirill@shutemov.name \
    --cc=kvm@vger.kernel.org \
    --cc=linux-coco@lists.linux.dev \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=mingo@redhat.com \
    --cc=pbonzini@redhat.com \
    --cc=peterz@infradead.org \
    --cc=rientjes@google.com \
    --cc=sathyanarayanan.kuppuswamy@linux.intel.com \
    --cc=seanjc@google.com \
    --cc=tglx@linutronix.de \
    --cc=thomas.lendacky@amd.com \
    --cc=varad.gautam@suse.com \
    --cc=vbabka@suse.cz \
    --cc=vkuznets@redhat.com \
    --cc=wanpengli@tencent.com \
    --cc=x86@kernel.org \
    --cc=yu.c.zhang@linux.intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).