linux-kernel - Re: [PATCH 0/7] Provide support for RMPREAD and a segmented RMP

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Date: Mon, 24 Jun 2024 09:42:23 -0500
From: Tom Lendacky <thomas.lendacky@....com>
To: 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 0/7] Provide support for RMPREAD and a segmented RMP

On 6/24/24 09:37, Tom Lendacky wrote:
> This series adds SEV-SNP support for a new instruction to read an RMP
> entry and for a segmented RMP table.
> 
> 
> The series is based off of and tested against the tip tree:
>   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git master
> 
>   aedd5b6d65f7 ("Merge branch into tip/master: 'x86/percpu'")

Forgot to update this before sending... the patches are actually based on:

    2846f42562f8 ("Merge branch into tip/master: 'x86/sev'")

Thanks,
Tom

> 
> ---
> 
> Tom Lendacky (7):
>   x86/sev: Prepare for using the RMPREAD instruction to access the RMP
>   x86/sev: Add support for the RMPREAD instruction
>   x86/sev: Require the RMPREAD instruction after Fam19h
>   x86/sev: Move the SNP probe routine out of the way
>   x86/sev: Map only the RMP table entries instead of the full RMP range
>   x86/sev: Treat the contiguous RMP table as a single RMP segment
>   x86/sev: Add full support for a segmented RMP table
> 
>  arch/x86/include/asm/cpufeatures.h |   2 +
>  arch/x86/include/asm/msr-index.h   |   9 +-
>  arch/x86/kernel/cpu/amd.c          |   3 +-
>  arch/x86/virt/svm/sev.c            | 633 ++++++++++++++++++++++++-----
>  4 files changed, 549 insertions(+), 98 deletions(-)
>