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Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hVYy1-0003nS-GP; Tue, 28 May 2019 10:04:25 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hVYxy-0003mZ-Q0 for linux-arm-kernel@lists.infradead.org; Tue, 28 May 2019 10:04:24 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 473B9341; Tue, 28 May 2019 03:04:20 -0700 (PDT) Received: from fuggles.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 56DCD3F59C; Tue, 28 May 2019 03:04:18 -0700 (PDT) Date: Tue, 28 May 2019 11:04:13 +0100 From: Will Deacon To: Ard Biesheuvel Subject: Re: [PATCH 0/4] arm64: wire up VM_FLUSH_RESET_PERMS Message-ID: <20190528100413.GA20809@fuggles.cambridge.arm.com> References: <20190523102256.29168-1-ard.biesheuvel@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190523102256.29168-1-ard.biesheuvel@arm.com> User-Agent: Mutt/1.11.1+86 (6f28e57d73f2) () X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190528_030422_851393_7E397677 X-CRM114-Status: GOOD ( 16.09 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, marc.zyngier@arm.com, linux-kernel@vger.kernel.org, Peter Zijlstra , Nadav Amit , Masami Hiramatsu , James Morse , Andrew Morton , Rick Edgecombe , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, May 23, 2019 at 11:22:52AM +0100, Ard Biesheuvel wrote: > Wire up the code introduced in v5.2 to manage the permissions > of executable vmalloc regions (and their linear aliases) more > strictly. > > One of the things that came up in the internal discussion is > whether non-x86 architectures have any benefit at all from the > lazy vunmap feature, and whether it would perhaps be better to > implement eager vunmap instead. > > Cc: Nadav Amit > Cc: Rick Edgecombe > Cc: Peter Zijlstra > Cc: Andrew Morton > Cc: Will Deacon > Cc: Masami Hiramatsu > Cc: James Morse > > Ard Biesheuvel (4): > arm64: module: create module allocations without exec permissions > arm64/mm: wire up CONFIG_ARCH_HAS_SET_DIRECT_MAP > arm64/kprobes: set VM_FLUSH_RESET_PERMS on kprobe instruction pages > arm64: bpf: do not allocate executable memory > > arch/arm64/Kconfig | 1 + > arch/arm64/include/asm/cacheflush.h | 3 ++ > arch/arm64/kernel/module.c | 4 +- > arch/arm64/kernel/probes/kprobes.c | 4 +- > arch/arm64/mm/pageattr.c | 48 ++++++++++++++++---- > arch/arm64/net/bpf_jit_comp.c | 2 +- > mm/vmalloc.c | 11 ----- > 7 files changed, 50 insertions(+), 23 deletions(-) Thanks, this all looks good to me. I can get pick this up for 5.2 if Rick's fixes [1] land soon enough. Cheers, Will [1] https://lore.kernel.org/lkml/20190527211058.2729-1-rick.p.edgecombe@intel.com/T/#u _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel