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Message-ID: <CAAH4kHbRmeK3SuEeryWnaU_daFcqPF==gU0H=fneJ2q9OmdG0g@mail.gmail.com>
Date: Thu, 27 Apr 2023 18:29:07 -0700
From: Dionna Amalie Glaze <dionnaglaze@...gle.com>
To: Sathyanarayanan Kuppuswamy
<sathyanarayanan.kuppuswamy@...ux.intel.com>
Cc: Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
Shuah Khan <shuah@...nel.org>,
Jonathan Corbet <corbet@....net>,
"H . Peter Anvin" <hpa@...or.com>,
"Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
Tony Luck <tony.luck@...el.com>,
Wander Lairson Costa <wander@...hat.com>,
Erdem Aktas <erdemaktas@...gle.com>,
Chong Cai <chongc@...gle.com>, Qinkun Bao <qinkun@...che.org>,
Guorui Yu <GuoRui.Yu@...ux.alibaba.com>,
Du Fan <fan.du@...el.com>, linux-kernel@...r.kernel.org,
linux-kselftest@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH v2 2/3] virt: tdx-guest: Add Quote generation support
>
> How about the following?
>
> Although this method reserves a fixed chunk of memory for GetQuote
> requests, such one-time allocation is preferable to the alternative
> choice of repeatedly allocating/freeing the shared buffer in the
> TDX_CMD_GET_QUOTE IOCTL handler, which will damage the direct map (because
> the sharing/unsharing process modifies the direct map). This allocation
> model is similar to that used by the AMD SEV guest driver.
>
>
Yes, this is clear, thank you.
--
-Dionna Glaze, PhD (she/her)
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