From patchwork Thu Aug 22 01:15:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13772334 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5683AC52D6F for ; Thu, 22 Aug 2024 01:20:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=5UecOpwcO5BwluEpdHjmYB6uOnSrjljWhDb7kZRqzgw=; b=SpE0Gce98Zw2oZ 7wVn7MMpQW1RFiPQqekxYG0MbIvVZNzFc/kUWi8kpaaQ7wxrC/vty+HfGR4qgUcz9aBczjvWu1W2a /3GJv2avjrD8O0cN6QsFSWtN2VE1p/cQGyX0OqR+ZjM3RauMc8B8UHL+XYS/wJoorl+aCu9W4oydr bMsC6qAVb1nfr1VUJsdqqQh3TPqQ5CAxPTq3E4RlH1xKFd/cIrgp5M/+vnr3xzPCGK+UFhrmV9i29 3706V/duGm1oktjnkVb0DnRbfF4lGnHuvBV6zoxP/up4XfD/IXo1t/LqrYyngkSEXOrm5ObgPG5cW 0+j2Wo/giwt/3f8zyvAQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sgwUc-0000000AsWW-37OA; Thu, 22 Aug 2024 01:20:02 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sgwRZ-0000000AqzH-4866; Thu, 22 Aug 2024 01:16:56 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 628E9611C2; Thu, 22 Aug 2024 01:16:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D6297C32781; Thu, 22 Aug 2024 01:16:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1724289413; bh=/QxGsZ7kGu5gcX/2Pir/IdpixOHnIz8YHhHUjvvkxmA=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=LGNDWsFlzxJpsLAVIpOQEC5kb6i5ctYSjTkS7zqKfYjDO4HeXm79/cVdBPJvmur9S od8xZNlqIyVK5T1bqkMmjcHzbj6a0klUysAlpQi2Yhgih8mzhbij+KdMseAm/FdQaF qZTBLHdveQuXmpCBhljTF9L8u25KyBQ3UkEXKwWG7h9HTFhHMq/8EFjSAASEO69fhU Rha2NJPqhAg6/O6D/yn51jj4yM7pVQ00gtqctq6vmIsGxMeZC4BVUrbCVpCVEvt/v1 72uY1RjlmTcQPUSdvy9x3LJE8vZby6RTH8pn89jlq3aBz6DUaszeHlYh35wZz71MjV TIllZc2KTvXAg== From: Mark Brown Date: Thu, 22 Aug 2024 02:15:07 +0100 Subject: [PATCH v11 04/39] mman: Add map_shadow_stack() flags MIME-Version: 1.0 Message-Id: <20240822-arm64-gcs-v11-4-41b81947ecb5@kernel.org> References: <20240822-arm64-gcs-v11-0-41b81947ecb5@kernel.org> In-Reply-To: <20240822-arm64-gcs-v11-0-41b81947ecb5@kernel.org> To: Catalin Marinas , Will Deacon , Jonathan Corbet , Andrew Morton , Marc Zyngier , Oliver Upton , James Morse , Suzuki K Poulose , Arnd Bergmann , Oleg Nesterov , Eric Biederman , Shuah Khan , "Rick P. Edgecombe" , Deepak Gupta , Ard Biesheuvel , Szabolcs Nagy , Kees Cook Cc: "H.J. Lu" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Florian Weimer , Christian Brauner , Thiago Jung Bauermann , Ross Burton , Yury Khrustalev , Wilco Dijkstra , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Mark Brown X-Mailer: b4 0.15-dev-37811 X-Developer-Signature: v=1; a=openpgp-sha256; l=1882; i=broonie@kernel.org; h=from:subject:message-id; bh=/QxGsZ7kGu5gcX/2Pir/IdpixOHnIz8YHhHUjvvkxmA=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBmxpEm5kN/wk9/KZfcaloebeKbxKmUlgdTlw1GvdtV QGljy32JATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZsaRJgAKCRAk1otyXVSH0G6bB/ 4oIpOZVu8Yo9IDRGCq6U5tCs4LXytwZCRgOuYex97b7Nkcj7jMWi4RhwitRZSfcpV0DbYlyYd+iWWW PXiCwTyXg40ZxbW3FSHAb0/7l1IC7zergq6B7kZ8GwyGAdYoI2VWcL668YXJJoQLkv2B67vBzFAWxA 0aJoPCixyep42bVyjfHhbxUWuUVTm6Azfs8smOLro0yiE3SO1sDbg9IHXUv8KRtBB+liDWGGcGlCR9 8cZ/Ui5XrZeRA2H2ClhqE8XtfVPG0YL24APKug6j9UtK+9QI38fi43WAWS9vEmgkxaxk8WN+QMdAyj N6cNfGTWdiZ/qqkbem1568AQ3f+9wl X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240821_181654_215288_3003F0A5 X-CRM114-Status: GOOD ( 13.31 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org In preparation for adding arm64 GCS support make the map_shadow_stack() SHADOW_STACK_SET_TOKEN flag generic and add _SET_MARKER. The existing flag indicates that a token usable for stack switch should be added to the top of the newly mapped GCS region while the new flag indicates that a top of stack marker suitable for use by unwinders should be added above that. For arm64 the top of stack marker is all bits 0. Reviewed-by: Thiago Jung Bauermann Reviewed-by: Catalin Marinas Signed-off-by: Mark Brown --- arch/x86/include/uapi/asm/mman.h | 3 --- include/uapi/asm-generic/mman.h | 4 ++++ 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/arch/x86/include/uapi/asm/mman.h b/arch/x86/include/uapi/asm/mman.h index 46cdc941f958..ac1e6277212b 100644 --- a/arch/x86/include/uapi/asm/mman.h +++ b/arch/x86/include/uapi/asm/mman.h @@ -5,9 +5,6 @@ #define MAP_32BIT 0x40 /* only give out 32bit addresses */ #define MAP_ABOVE4G 0x80 /* only map above 4GB */ -/* Flags for map_shadow_stack(2) */ -#define SHADOW_STACK_SET_TOKEN (1ULL << 0) /* Set up a restore token in the shadow stack */ - #include #endif /* _ASM_X86_MMAN_H */ diff --git a/include/uapi/asm-generic/mman.h b/include/uapi/asm-generic/mman.h index 57e8195d0b53..5e3d61ddbd8c 100644 --- a/include/uapi/asm-generic/mman.h +++ b/include/uapi/asm-generic/mman.h @@ -19,4 +19,8 @@ #define MCL_FUTURE 2 /* lock all future mappings */ #define MCL_ONFAULT 4 /* lock all pages that are faulted in */ +#define SHADOW_STACK_SET_TOKEN (1ULL << 0) /* Set up a restore token in the shadow stack */ +#define SHADOW_STACK_SET_MARKER (1ULL << 1) /* Set up a top of stack marker in the shadow stack */ + + #endif /* __ASM_GENERIC_MMAN_H */