linux-kernel - Re: [PATCH v2] sev-snp: parse MP tables for VMware hypervisor

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Message-ID: <20250313175226.GEZ9MbWuPkPQweJo1U@fat_crate.local>
Date: Thu, 13 Mar 2025 18:52:26 +0100
From: Borislav Petkov <bp@...en8.de>
To: Ajay Kaher <ajay.kaher@...adcom.com>
Cc: thomas.lendacky@....com, alexey.makhalov@...adcom.com,
	bcm-kernel-feedback-list@...adcom.com, bo.gan@...adcom.com,
	dave.hansen@...ux.intel.com, florian.fainelli@...adcom.com,
	hpa@...or.com, kevinloughlin@...gle.com,
	linux-kernel@...r.kernel.org, mingo@...hat.com, tglx@...utronix.de,
	vamsi-krishna.brahmajosyula@...adcom.com,
	vasavi.sirnapalli@...adcom.com, virtualization@...ts.linux.dev,
	x86@...nel.org, ye.li@...adcom.com
Subject: Re: [PATCH v2] sev-snp: parse MP tables for VMware hypervisor

On Thu, Mar 13, 2025 at 05:31:11PM +0000, Ajay Kaher wrote:
> For VMware hypervisor, SEV-SNP enabled VM's could boot without UEFI.

VMs

mingo, pls fix up while applying.

> In this case, mpparse_find_mptable() has to be called to parse MP
> tables which contains boot information.
> 
> Fixes: 0f4a1e80989a ("x86/sev: Skip ROM range scans and validation for SEV-SNP guests")
> Co-developed-by: Ye Li <ye.li@...adcom.com>
> Signed-off-by: Ye Li <ye.li@...adcom.com>
> Signed-off-by: Ajay Kaher <ajay.kaher@...adcom.com>
> Tested-by: Ye Li <ye.li@...adcom.com>
> Reviewed-by: Kevin Loughlin <kevinloughlin@...gle.com>
> ---
> Changes since v1:
> https://lore.kernel.org/lkml/20241219114400.858980-1-ajay.kaher@broadcom.com/
>         - use cc_platform_has(CC_ATTR_GUEST_SEV_SNP) instead of
>           (sev_status & MSR_AMD64_SEV_SNP_ENABLED)
> 	- remove unwanted header files
> ---
>  arch/x86/kernel/cpu/vmware.c | 4 ++++
>  1 file changed, 4 insertions(+)

Acked-by: Borislav Petkov (AMD) <bp@...en8.de>

-- 
Regards/Gruss,
    Boris.

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