From: Binbin Wu <binbin.wu@linux.intel.com>
To: Peter Fang <peter.fang@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
Kiryl Shutsemau <kas@kernel.org>,
Rick Edgecombe <rick.p.edgecombe@intel.com>,
Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppuswamy@linux.intel.com>,
Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
Borislav Petkov <bp@alien8.de>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
linux-kernel@vger.kernel.org, linux-coco@lists.linux.dev,
kvm@vger.kernel.org, Xiaoyao Li <xiaoyao.li@intel.com>
Subject: Re: [PATCH v2 1/2] x86/tdx: Add helper to query maximum TD Quote size
Date: Wed, 22 Jul 2026 21:21:12 +0800 [thread overview]
Message-ID: <e083f203-684f-4ae2-81c5-39d9ff24629e@linux.intel.com> (raw)
In-Reply-To: <20260717214349.4075994-2-peter.fang@intel.com>
On 7/18/2026 5:43 AM, Peter Fang wrote:
> TDX attestation report ("Quote") sizes can grow with newer cryptographic
> schemes, so guests can no longer rely on a fixed-size buffer for the
> Quote.
>
> Newer TDX modules report the maximum Quote size via a TD-scope metadata
> field. Add a helper to query the size instead of exposing tdg_vm_rd()
> directly, as it can read arbitrary metadata fields.
>
> Thanks to Xu Yilun for suggesting this in an off-list discussion.
>
> Reviewed-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
> Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
> Signed-off-by: Peter Fang <peter.fang@intel.com>
Reviewed-by: Binbin Wu <binbin.wu@linux.intel.com>
next prev parent reply other threads:[~2026-07-22 13:21 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-17 21:43 [PATCH v2 0/2] tdx-guest: Make Quote buffer size dynamic Peter Fang
2026-07-17 21:43 ` [PATCH v2 1/2] x86/tdx: Add helper to query maximum TD Quote size Peter Fang
2026-07-22 13:21 ` Binbin Wu [this message]
2026-07-17 21:43 ` [PATCH v2 2/2] virt: tdx-guest: Allocate Quote buffer dynamically Peter Fang
2026-07-17 21:55 ` sashiko-bot
2026-07-20 13:35 ` Dave Hansen
2026-07-21 6:49 ` Peter Fang
2026-07-21 13:48 ` Dave Hansen
2026-07-21 16:43 ` Edgecombe, Rick P
2026-07-22 7:36 ` Peter Fang
2026-07-22 12:00 ` Kiryl Shutsemau
2026-07-22 6:39 ` Peter Fang
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=e083f203-684f-4ae2-81c5-39d9ff24629e@linux.intel.com \
--to=binbin.wu@linux.intel.com \
--cc=bp@alien8.de \
--cc=dave.hansen@linux.intel.com \
--cc=hpa@zytor.com \
--cc=kas@kernel.org \
--cc=kvm@vger.kernel.org \
--cc=linux-coco@lists.linux.dev \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=peter.fang@intel.com \
--cc=rick.p.edgecombe@intel.com \
--cc=sathyanarayanan.kuppuswamy@linux.intel.com \
--cc=tglx@kernel.org \
--cc=x86@kernel.org \
--cc=xiaoyao.li@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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.