From: Luis Chamberlain <mcgrof@kernel.org>
To: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Jessica Yu <jeyu@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
"kgdb-bugreport@lists.sourceforge.net"
<kgdb-bugreport@lists.sourceforge.net>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>
Subject: Re: [PATCH 0/7] Allocate module text and data separately
Date: Tue, 25 Jan 2022 12:52:21 -0800 [thread overview]
Message-ID: <YfBjBRFEbljfbrvx@bombadil.infradead.org> (raw)
In-Reply-To: <cover.1643015752.git.christophe.leroy@csgroup.eu>
On Mon, Jan 24, 2022 at 09:22:11AM +0000, Christophe Leroy wrote:
> This series allow architectures to request having modules data in
> vmalloc area instead of module area.
>
> This is required on powerpc book3s/32 in order to set data non
> executable, because it is not possible to set executability on page
> basis, this is done per 256 Mbytes segments. The module area has exec
> right, vmalloc area has noexec.
>
> This can also be useful on other powerpc/32 in order to maximize the
> chance of code being close enough to kernel core to avoid branch
> trampolines.
Am I understanding that this entire effort is for 32-bit powerpc?
If so, why such an interest in 32-bit these days?
Luis
next prev parent reply other threads:[~2022-01-25 20:53 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-24 9:22 [PATCH 0/7] Allocate module text and data separately Christophe Leroy
2022-01-24 9:22 ` [PATCH 1/7] modules: Refactor within_module_core() and within_module_init() Christophe Leroy
2022-01-24 12:32 ` Christoph Hellwig
2022-01-24 13:01 ` Christophe Leroy
2022-01-27 11:32 ` Christophe Leroy
2022-01-26 21:36 ` Mike Rapoport
2022-01-27 11:33 ` Christophe Leroy
2022-01-24 9:22 ` [PATCH 2/7] modules: Add within_module_text() macro Christophe Leroy
2022-01-24 9:22 ` [PATCH 3/7] modules: Always have struct mod_tree_root Christophe Leroy
2022-01-24 9:22 ` [PATCH 4/7] modules: Prepare for handling several RB trees Christophe Leroy
2022-01-24 9:22 ` [PATCH 5/7] modules: Introduce data_layout Christophe Leroy
2022-01-24 9:22 ` [PATCH 6/7] modules: Add CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC Christophe Leroy
2022-01-24 21:43 ` Doug Anderson
2022-01-25 5:43 ` Christophe Leroy
2022-01-25 21:10 ` Luis Chamberlain
2022-01-26 6:38 ` Christophe Leroy
2022-02-02 23:34 ` Luis Chamberlain
2022-01-27 16:05 ` Miroslav Benes
2022-01-27 18:04 ` Christophe Leroy
2022-01-24 9:22 ` [PATCH 7/7] powerpc: Select ARCH_WANTS_MODULES_DATA_IN_VMALLOC on book3s/32 and 8xx Christophe Leroy
2022-01-24 12:27 ` kernel test robot
2022-01-25 20:52 ` Luis Chamberlain [this message]
2022-01-26 5:54 ` [PATCH 0/7] Allocate module text and data separately Christophe Leroy
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