linux-kernel - Re: [PATCH v2 05/25] x86/virt/tdx: Add SEAMCALL wrappers for TDX KeyID management

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: <235f3512-9949-4d69-ae43-1280548fd983@intel.com>
Date: Tue, 12 Nov 2024 12:09:44 -0800
From: Dave Hansen <dave.hansen@...el.com>
To: Rick Edgecombe <rick.p.edgecombe@...el.com>, pbonzini@...hat.com,
 seanjc@...gle.com
Cc: yan.y.zhao@...el.com, isaku.yamahata@...il.com, kai.huang@...el.com,
 kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
 tony.lindgren@...ux.intel.com, xiaoyao.li@...el.com,
 reinette.chatre@...el.com, Isaku Yamahata <isaku.yamahata@...el.com>,
 Sean Christopherson <sean.j.christopherson@...el.com>,
 Binbin Wu <binbin.wu@...ux.intel.com>, Yuan Yao <yuan.yao@...el.com>
Subject: Re: [PATCH v2 05/25] x86/virt/tdx: Add SEAMCALL wrappers for TDX
 KeyID management

On 10/30/24 12:00, Rick Edgecombe wrote:
> From: Isaku Yamahata <isaku.yamahata@...el.com>
> 
> Intel TDX protects guest VMs from malicious host and certain physical
> attacks. Pre-TDX Intel hardware has support for a memory encryption
> architecture called MK-TME, which repurposes several high bits of
> physical address as "KeyID". TDX ends up with reserving a sub-range of
> MK-TME KeyIDs as "TDX private KeyIDs".

The changelog there was great.  It read my mind because I was wondering
why some of the operations didn't get combined in helper functions which
could be exported.

Acked-by: Dave Hansen <dave.hansen@...ux.intel.com>