linux-kernel - Re: [PATCH v2] x86/mm: resize user_pcid_flush_mask for PTI / broadcast TLB flush combination

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Message-ID: <aCl9TUnOuWivv6Ze@gmail.com>
Date: Sun, 18 May 2025 08:25:17 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Rik van Riel <riel@...riel.com>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>,
	Andy Lutomirski <luto@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
	x86@...nel.org, linux-kernel@...r.kernel.org, kernel-team@...a.com
Subject: Re: [PATCH v2] x86/mm: resize user_pcid_flush_mask for PTI /
 broadcast TLB flush combination


* Rik van Riel <riel@...riel.com> wrote:

> But it is perfectly happy with getting the address of the first long 
> in that array, which works for both array size 1 and array size 32.

Yeah. Testing is still a question: does this boot on a system with PCID 
&& INVLPGB features, with PTI force-enabled ("pti=on" boot option)?

Thanks,

	Ingo