linux-kernel - Re: [PATCH v14 00/11] Support page table check on PowerPC

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Message-ID: <Z_jcaCdMFENW8KSG@gmail.com>
Date: Fri, 11 Apr 2025 11:10:00 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Andrew Donnellan <ajd@...ux.ibm.com>
Cc: linuxppc-dev@...ts.ozlabs.org, x86@...nel.org, linux-mm@...ck.org,
	linux-riscv@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	pasha.tatashin@...een.com, sweettea-kernel@...miny.me,
	christophe.leroy@...roup.eu
Subject: Re: [PATCH v14 00/11] Support page table check on PowerPC


* Andrew Donnellan <ajd@...ux.ibm.com> wrote:

> Support page table check on all PowerPC platforms. This works by
> serialising assignments, reassignments and clears of page table
> entries at each level in order to ensure that anonymous mappings
> have at most one writable consumer, and likewise that file-backed
> mappings are not simultaneously also anonymous mappings.
> 
> In order to support this infrastructure, a number of stubs must be
> defined for all powerpc platforms. Additionally, separate set_pte_at()
> and set_pte_at_unchecked(), to allow for internal, uninstrumented mappings.

>  arch/x86/include/asm/pgtable.h               | 22 +++----

For all the x86 <asm/pgtable.h> function parameter extensions changes:

  Acked-by: Ingo Molnar <mingo@...nel.org>

Thanks,

	Ingo