linux-kernel - Re: [PATCH v2 0/2] x86/cpu: fix invalid MTRR mask values for SEV or TME

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Date: Tue, 13 Feb 2024 09:07:46 -0800
From: Dave Hansen <dave.hansen@...el.com>
To: Paolo Bonzini <pbonzini@...hat.com>
Cc: linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
 Zixi Chen <zixchen@...hat.com>, Adam Dunlap <acdunlap@...gle.com>,
 "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
 Xiaoyao Li <xiaoyao.li@...el.com>, Kai Huang <kai.huang@...el.com>,
 Dave Hansen <dave.hansen@...ux.intel.com>,
 Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...nel.org>,
 x86@...nel.org, stable@...r.kernel.org
Subject: Re: [PATCH v2 0/2] x86/cpu: fix invalid MTRR mask values for SEV or
 TME

On 2/1/24 15:08, Paolo Bonzini wrote:
> There is unfortunately an important hurdle for your patch, in that
> currently the BSP and AP flows are completely different.

Do we even _need_ c->x86_phys_bits for APs?  I need to do a bit more
grepping, but I only see it being read in show_cpuinfo().  Everything
else seems to be boot_cpu_data.x86_phys_bits.