linux-kernel - Re: [PATCH RFC 1/4] mm: Introduce guest

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <03db8091-d563-402b-9eec-ad36a364e5d9@redhat.com>
Date: Tue, 6 Aug 2024 15:48:18 +0200
From: David Hildenbrand <david@...hat.com>
To: Elliot Berman <quic_eberman@...cinc.com>,
 Andrew Morton <akpm@...ux-foundation.org>,
 Paolo Bonzini <pbonzini@...hat.com>, Sean Christopherson
 <seanjc@...gle.com>, Fuad Tabba <tabba@...gle.com>,
 Patrick Roy <roypat@...zon.co.uk>, qperret@...gle.com,
 Ackerley Tng <ackerleytng@...gle.com>
Cc: linux-coco@...ts.linux.dev, linux-arm-msm@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-mm@...ck.org, kvm@...r.kernel.org
Subject: Re: [PATCH RFC 1/4] mm: Introduce guest_memfd

On 05.08.24 20:34, Elliot Berman wrote:
> In preparation for adding more features to KVM's guest_memfd, refactor
> and introduce a library which abstracts some of the core-mm decisions
> about managing folios associated with the file. The goal of the refactor
> serves two purposes:
> 
> Provide an easier way to reason about memory in guest_memfd. With KVM
> supporting multiple confidentiality models (TDX, SEV-SNP, pKVM, ARM
> CCA), and coming support for allowing kernel and userspace to access
> this memory, it seems necessary to create a stronger abstraction between
> core-mm concerns and hypervisor concerns.
> 
> Provide a common implementation for other hypervisors (Gunyah) to use.
> 
> Signed-off-by: Elliot Berman <quic_eberman@...cinc.com>

Instead of "Introduce guest_memfd" and "Convert to use mm/guest_memfd", 
I suggest a single patch that factors out guest_memfd into core-mm.

Or is there any particular reason for the split?

-- 
Cheers,

David / dhildenb