From: "Adrian Barnaś" <abarnas@google.com>
To: Ard Biesheuvel <ardb+git@google.com>
Cc: linux-kernel@vger.kernel.org, Ard Biesheuvel <ardb@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Mike Rapoport <rppt@kernel.org>,
Luis Chamberlain <mcgrof@kernel.org>,
Petr Pavlu <petr.pavlu@suse.com>,
Daniel Gomez <da.gomez@kernel.org>,
Sami Tolvanen <samitolvanen@google.com>,
Aaron Tomlin <atomlin@atomlin.com>,
Ryan Roberts <ryan.roberts@arm.com>,
Kevin Brodsky <kevin.brodsky@arm.com>,
linux-arm-kernel@lists.infradead.org,
linux-trace-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-modules@vger.kernel.org
Subject: Re: [RFC PATCH 6/9] arm64: Enable the execmem ROX cache for module text
Date: Sun, 23 Aug 2026 16:46:55 +0000 [thread overview]
Message-ID: <aosj_1LChfLM8xaz@google.com> (raw)
In-Reply-To: <20260822135323.795946-17-ardb+git@google.com>
On Sat, Aug 22, 2026 at 03:53:28PM +0200, Ard Biesheuvel wrote:
>From: Ard Biesheuvel <ardb@kernel.org>
>
>Wire up the existing support for the execmem ROX cache on arm64, so that
>it will be used for module .text and .init.text regions. This will be
>relied upon by a subsequent patch in order to allocate those regions
>from a single chunk of memory.
>
Until Mike lands his changes [1] on set_direct_map, enabling ROX_CACHE on
ARM64 would cause a permission fault when the same part of the direct map is
used again (the RO flag is not properly stripped off after an execmem cache
clean).
[1]: https://lore.kernel.org/all/20260823-execmem-set-vm-perms-v0-2-v2-0-b013a37d84b3@kernel.org/
Best regards,
Adrian
next prev parent reply other threads:[~2026-08-23 16:47 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-22 13:53 [RFC PATCH 0/9] arm64: Allocate .text and .init.text together Ard Biesheuvel
2026-08-22 13:53 ` [RFC PATCH 1/9] mm: execmem: Add API to split an existing execmem cache allocation Ard Biesheuvel
2026-08-22 13:53 ` [RFC PATCH 2/9] mm: execmem: Allow huge vmappings to be avoided for execmem caches Ard Biesheuvel
2026-08-22 14:10 ` sashiko-bot
2026-08-22 13:53 ` [RFC PATCH 3/9] module: Place MOD_TEXT before MOD_INIT_TEXT in enumeration Ard Biesheuvel
2026-08-22 14:05 ` sashiko-bot
2026-08-22 13:53 ` [RFC PATCH 4/9] module: Allocate MOD_INIT_TEXT from the MOD_TEXT ROX allocation Ard Biesheuvel
2026-08-28 14:11 ` Bradley Morgan
2026-08-22 13:53 ` [RFC PATCH 5/9] arm64: mm: Permit permissions changes on huge vmappings Ard Biesheuvel
2026-08-22 14:10 ` sashiko-bot
2026-08-23 16:52 ` Adrian Barnaś
2026-08-22 13:53 ` [RFC PATCH 6/9] arm64: Enable the execmem ROX cache for module text Ard Biesheuvel
2026-08-22 14:13 ` sashiko-bot
2026-08-23 16:46 ` Adrian Barnaś [this message]
2026-08-22 13:53 ` [RFC PATCH 7/9] arm64: ftrace: Revert "fix unreachable PLT for ftrace_caller ..." Ard Biesheuvel
2026-08-22 13:53 ` [RFC PATCH 8/9] arm64: module: Combine init and core PLT entries again Ard Biesheuvel
2026-08-22 14:12 ` sashiko-bot
2026-08-22 13:53 ` [RFC PATCH 9/9] arm64: ftrace: Simplify PLT handling Ard Biesheuvel
2026-08-28 13:07 ` [RFC PATCH 0/9] arm64: Allocate .text and .init.text together Petr Pavlu
2026-08-28 13:45 ` Ard Biesheuvel
2026-08-31 13:30 ` Petr Pavlu
2026-09-02 17:23 ` Mike Rapoport
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