linux-kernel - Re: [PATCH v3 2/8] x86/sev: Add support for the RMPREAD instruction

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Message-ID: <ef20092e-24e4-4d8d-8b1e-b07cfdf5a9a7@amd.com>
Date: Fri, 18 Oct 2024 09:51:34 +0530
From: Neeraj Upadhyay <Neeraj.Upadhyay@....com>
To: Tom Lendacky <thomas.lendacky@....com>, linux-kernel@...r.kernel.org,
 x86@...nel.org
Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
 Michael Roth <michael.roth@....com>, Ashish Kalra <ashish.kalra@....com>
Subject: Re: [PATCH v3 2/8] x86/sev: Add support for the RMPREAD instruction



On 9/30/2024 8:52 PM, Tom Lendacky wrote:
> The RMPREAD instruction returns an architecture defined format of an
> RMP table entry. This is the preferred method for examining RMP entries.
> 
> The instruction is advertised in CPUID 0x8000001f_EAX[21]. Use this
> instruction when available.
> 
> Signed-off-by: Tom Lendacky <thomas.lendacky@....com>

Reviewed-by: Neeraj Upadhyay <Neeraj.Upadhyay@....com>


- Neeraj