linux-kernel - Re: [PATCH v1 04/26] x86/sev: Add the host SEV-SNP initialization support

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Message-ID: <20240105191921.GHZZhWObgbgXxP/kkB@fat_crate.local>
Date: Fri, 5 Jan 2024 20:19:21 +0100
From: Borislav Petkov <bp@...en8.de>
To: Michael Roth <michael.roth@....com>
Cc: x86@...nel.org, kvm@...r.kernel.org, linux-coco@...ts.linux.dev,
	linux-mm@...ck.org, linux-crypto@...r.kernel.org,
	linux-kernel@...r.kernel.org, tglx@...utronix.de, mingo@...hat.com,
	jroedel@...e.de, thomas.lendacky@....com, hpa@...or.com,
	ardb@...nel.org, pbonzini@...hat.com, seanjc@...gle.com,
	vkuznets@...hat.com, jmattson@...gle.com, luto@...nel.org,
	dave.hansen@...ux.intel.com, slp@...hat.com, pgonda@...gle.com,
	peterz@...radead.org, srinivas.pandruvada@...ux.intel.com,
	rientjes@...gle.com, tobin@....com, vbabka@...e.cz,
	kirill@...temov.name, ak@...ux.intel.com, tony.luck@...el.com,
	sathyanarayanan.kuppuswamy@...ux.intel.com, alpergun@...gle.com,
	jarkko@...nel.org, ashish.kalra@....com, nikunj.dadhania@....com,
	pankaj.gupta@....com, liam.merwick@...cle.com, zhi.a.wang@...el.com,
	Brijesh Singh <brijesh.singh@....com>
Subject: Re: [PATCH v1 04/26] x86/sev: Add the host SEV-SNP initialization
 support

On Sat, Dec 30, 2023 at 10:19:32AM -0600, Michael Roth wrote:
> +static int __init __snp_rmptable_init(void)
> +{
> +	u64 rmptable_size;
> +	void *rmptable_start;
> +	u64 val;

...

Ontop:

diff --git a/arch/x86/virt/svm/sev.c b/arch/x86/virt/svm/sev.c
index ce7ede9065ed..566bb6f39665 100644
--- a/arch/x86/virt/svm/sev.c
+++ b/arch/x86/virt/svm/sev.c
@@ -150,6 +150,11 @@ bool snp_probe_rmptable_info(void)
 	return true;
 }
 
+/*
+ * Do the necessary preparations which are verified by the firmware as
+ * described in the SNP_INIT_EX firmware command description in the SNP
+ * firmware ABI spec.
+ */
 static int __init __snp_rmptable_init(void)
 {
 	u64 rmptable_size;

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette