From: Andrew Donnellan <ajd@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org,
pasha.tatashin@soleen.com, akpm@linux-foundation.org,
maddy@linux.ibm.com
Cc: x86@kernel.org, linux-riscv@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, sweettea-kernel@dorminy.me
Subject: Re: [PATCH v13 00/11] Support page table check on PowerPC
Date: Thu, 13 Mar 2025 13:54:39 +1100 [thread overview]
Message-ID: <006ac081cf0e130426bcf0ef777bed346f6df002.camel@linux.ibm.com> (raw)
In-Reply-To: <20250211161404.850215-1-ajd@linux.ibm.com>
On Wed, 2025-02-12 at 03:13 +1100, Andrew Donnellan 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, seperate
> set_pte_at()
> and set_pte_at_unchecked(), to allow for internal, uninstrumented
> mappings.
Talking to Maddy about this off-list - given that this series touches
on generic code and several architectures, would it be best to take it
through the mm tree rather than powerpc?
--
Andrew Donnellan OzLabs, ADL Canberra
ajd@linux.ibm.com IBM Australia Limited
next prev parent reply other threads:[~2025-03-13 2:54 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-11 16:13 Andrew Donnellan
2025-02-11 16:13 ` [PATCH v13 01/11] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pud_set() Andrew Donnellan
2025-02-11 16:13 ` [PATCH v13 02/11] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pmd_set() Andrew Donnellan
2025-02-11 16:13 ` [PATCH v13 03/11] mm/page_table_check: Provide addr parameter to page_table_check_pte_set() Andrew Donnellan
2025-02-11 16:13 ` [PATCH v13 04/11] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pud_clear() Andrew Donnellan
2025-03-13 23:10 ` Andrew Morton
2025-04-11 5:52 ` Andrew Donnellan
2025-02-11 16:13 ` [PATCH v13 05/11] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pmd_clear() Andrew Donnellan
2025-02-11 16:13 ` [PATCH v13 06/11] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pte_clear() Andrew Donnellan
2025-02-11 16:14 ` [PATCH v13 07/11] mm: Provide address parameter to p{te,md,ud}_user_accessible_page() Andrew Donnellan
2025-02-11 16:14 ` [PATCH v13 08/11] powerpc: mm: Add pud_pfn() stub Andrew Donnellan
2025-02-11 16:14 ` [PATCH v13 09/11] powerpc: mm: Implement *_user_accessible_page() for ptes Andrew Donnellan
2025-02-11 16:14 ` [PATCH v13 10/11] powerpc: mm: Use set_pte_at_unchecked() for internal usages Andrew Donnellan
2025-02-11 16:14 ` [PATCH v13 11/11] powerpc: mm: Support page table check Andrew Donnellan
2025-03-13 2:54 ` Andrew Donnellan [this message]
2025-03-13 22:47 ` [PATCH v13 00/11] Support page table check on PowerPC Andrew Morton
2025-03-18 5:38 ` Madhavan Srinivasan
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