From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0D009C43603 for ; Fri, 6 Dec 2019 22:14:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D3236206DB for ; Fri, 6 Dec 2019 22:14:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="JUnATL/q" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726598AbfLFWOK (ORCPT ); Fri, 6 Dec 2019 17:14:10 -0500 Received: from mail-pg1-f201.google.com ([209.85.215.201]:38480 "EHLO mail-pg1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726552AbfLFWOH (ORCPT ); Fri, 6 Dec 2019 17:14:07 -0500 Received: by mail-pg1-f201.google.com with SMTP id l13so4558951pgt.5 for ; Fri, 06 Dec 2019 14:14:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=XVGcsXtiiPVE9a9TFllXGgGHEKcXDxSx20NO6hJScDc=; b=JUnATL/qYc1oxv8iBdTskfQzu3dUUjyggOYJEMcIQnnUL/Y0NRoC+SEMllJtcFOWiS N/ulKnmZgrhoasRLRMaSLDH6091pEOUYgXXuTdPJyA/+/zT+NjML18Xbk0q7JQJZlyWp 6rTkEVNH+fLD7+o9KvYuKvTopFNc6WKI4uib8O/Vx3iw4Shp3SUt/TKbmahphI0HKiU4 BPRPCXf6h87GZeFyHIHYFqSn3p3Rv69hjOpYO3XFPBCkg3Q3z4MrJ2EA56qijI8w4jiX NQZtE0UhN3gJbyVa0+qGFUMyTZbRuK6Bc5RytwdbEZTnrQcmzPqvaU68OoqewWa4Q8Up 87AQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=XVGcsXtiiPVE9a9TFllXGgGHEKcXDxSx20NO6hJScDc=; b=T7qqYmA8vquPRJiAb8xbeIaqQaA1p/1Lw8OC4/Yj9CJunnuazlww/9kX9tytfknRzm KAZoZwQ/KQHs20awWTuyxZKRHbf/JN9Ov0I2hlmaW5NrdaNRCIrSl1H9S25KEo8pSK6D z/vnCI2UhxfNMPY5Xrq4abqKw2dfM+TX4OvwxZQpbcXixWYXnbycmQcdwEsfE0rSGLUM vZvbXGkw4BH5b1Szm3c3NdAayOXoIBo2+Et2xfKuvuPN9b0cvuM+xJ2frqxC8Z/voPpP 1SskbNfc8/WkJLaR+IX5BDd3htK9dX3PSGpYtBbI8a8Y17rorCYOkIu+lL6RDvxSyjmb Cy0A== X-Gm-Message-State: APjAAAWALJ9ALcZ94cyyiXx81o4jgRja+8w5bDRnIL1ktMHgho4B6XhI MzQnk/omO+Rc1QJL6vlDMsNxHAVa+R5+C/NekN0= X-Google-Smtp-Source: APXvYqzpc2h9jpUCodzOkaKdDJjjZM8itrSvWPNDKAcJvhYbUWMf4zn2+0r1408XQPHyy98KZt3TkfsfH2+NYjTL2w4= X-Received: by 2002:a63:1c66:: with SMTP id c38mr5983922pgm.368.1575670446054; Fri, 06 Dec 2019 14:14:06 -0800 (PST) Date: Fri, 6 Dec 2019 14:13:40 -0800 In-Reply-To: <20191206221351.38241-1-samitolvanen@google.com> Message-Id: <20191206221351.38241-5-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20191206221351.38241-1-samitolvanen@google.com> X-Mailer: git-send-email 2.24.0.393.g34dc348eaf-goog Subject: [PATCH v6 04/15] arm64: kernel: avoid x18 in __cpu_soft_restart From: Sami Tolvanen To: Will Deacon , Catalin Marinas , Steven Rostedt , Masami Hiramatsu , Ard Biesheuvel , Mark Rutland Cc: Dave Martin , Kees Cook , Laura Abbott , Marc Zyngier , Nick Desaulniers , Jann Horn , Miguel Ojeda , Masahiro Yamada , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Sami Tolvanen Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ard Biesheuvel The code in __cpu_soft_restart() uses x18 as an arbitrary temp register, which will shortly be disallowed. So use x8 instead. Link: https://patchwork.kernel.org/patch/9836877/ Signed-off-by: Ard Biesheuvel [Sami: updated commit message] Signed-off-by: Sami Tolvanen Reviewed-by: Mark Rutland Reviewed-by: Kees Cook --- arch/arm64/kernel/cpu-reset.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/cpu-reset.S b/arch/arm64/kernel/cpu-reset.S index 6ea337d464c4..32c7bf858dd9 100644 --- a/arch/arm64/kernel/cpu-reset.S +++ b/arch/arm64/kernel/cpu-reset.S @@ -42,11 +42,11 @@ ENTRY(__cpu_soft_restart) mov x0, #HVC_SOFT_RESTART hvc #0 // no return -1: mov x18, x1 // entry +1: mov x8, x1 // entry mov x0, x2 // arg0 mov x1, x3 // arg1 mov x2, x4 // arg2 - br x18 + br x8 ENDPROC(__cpu_soft_restart) .popsection -- 2.24.0.393.g34dc348eaf-goog From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 60D64C43603 for ; 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Fri, 06 Dec 2019 14:14:06 -0800 (PST) Date: Fri, 6 Dec 2019 14:13:40 -0800 In-Reply-To: <20191206221351.38241-1-samitolvanen@google.com> Message-Id: <20191206221351.38241-5-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20191206221351.38241-1-samitolvanen@google.com> X-Mailer: git-send-email 2.24.0.393.g34dc348eaf-goog Subject: [PATCH v6 04/15] arm64: kernel: avoid x18 in __cpu_soft_restart From: Sami Tolvanen To: Will Deacon , Catalin Marinas , Steven Rostedt , Masami Hiramatsu , Ard Biesheuvel , Mark Rutland X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191206_141408_232900_4D039B23 X-CRM114-Status: UNSURE ( 8.43 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kees Cook , Jann Horn , Masahiro Yamada , Marc Zyngier , kernel-hardening@lists.openwall.com, Nick Desaulniers , linux-kernel@vger.kernel.org, Miguel Ojeda , clang-built-linux@googlegroups.com, Sami Tolvanen , Laura Abbott , Dave Martin , 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 From: Ard Biesheuvel The code in __cpu_soft_restart() uses x18 as an arbitrary temp register, which will shortly be disallowed. So use x8 instead. Link: https://patchwork.kernel.org/patch/9836877/ Signed-off-by: Ard Biesheuvel [Sami: updated commit message] Signed-off-by: Sami Tolvanen Reviewed-by: Mark Rutland Reviewed-by: Kees Cook --- arch/arm64/kernel/cpu-reset.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/cpu-reset.S b/arch/arm64/kernel/cpu-reset.S index 6ea337d464c4..32c7bf858dd9 100644 --- a/arch/arm64/kernel/cpu-reset.S +++ b/arch/arm64/kernel/cpu-reset.S @@ -42,11 +42,11 @@ ENTRY(__cpu_soft_restart) mov x0, #HVC_SOFT_RESTART hvc #0 // no return -1: mov x18, x1 // entry +1: mov x8, x1 // entry mov x0, x2 // arg0 mov x1, x3 // arg1 mov x2, x4 // arg2 - br x18 + br x8 ENDPROC(__cpu_soft_restart) .popsection -- 2.24.0.393.g34dc348eaf-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1E858C2D0C1 for ; Fri, 6 Dec 2019 22:14:49 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id 6DDEA21835 for ; Fri, 6 Dec 2019 22:14:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="JUnATL/q" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6DDEA21835 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernel-hardening-return-17476-kernel-hardening=archiver.kernel.org@lists.openwall.com Received: (qmail 18347 invoked by uid 550); 6 Dec 2019 22:14:18 -0000 Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Received: (qmail 18247 invoked from network); 6 Dec 2019 22:14:18 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=XVGcsXtiiPVE9a9TFllXGgGHEKcXDxSx20NO6hJScDc=; b=JUnATL/qYc1oxv8iBdTskfQzu3dUUjyggOYJEMcIQnnUL/Y0NRoC+SEMllJtcFOWiS N/ulKnmZgrhoasRLRMaSLDH6091pEOUYgXXuTdPJyA/+/zT+NjML18Xbk0q7JQJZlyWp 6rTkEVNH+fLD7+o9KvYuKvTopFNc6WKI4uib8O/Vx3iw4Shp3SUt/TKbmahphI0HKiU4 BPRPCXf6h87GZeFyHIHYFqSn3p3Rv69hjOpYO3XFPBCkg3Q3z4MrJ2EA56qijI8w4jiX NQZtE0UhN3gJbyVa0+qGFUMyTZbRuK6Bc5RytwdbEZTnrQcmzPqvaU68OoqewWa4Q8Up 87AQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=XVGcsXtiiPVE9a9TFllXGgGHEKcXDxSx20NO6hJScDc=; b=hb0TSwynwozOK/D5zH1FBm3ZM0qjn1MhG4t7hyTrkk9/nH/a7zKED7g2LvXlB0Cqya M0+pHpIMZ+mCbkWKPIspyR8vxmcyGg0FlEJnTZYDhZ23bTBw+BTNvW5MFU1/tRalwzLn HXnN+XKete3pWr9Ften8RTuufFDwljtVvvfJn423w7/FBAKglxHgfFwZlzja5jD3GpLT oGbYWB2nL6Fu6lulwCm5dVcG8iJCx75wd5vYVevg4fXXW/lQoS5QFNvI3PZcpxDODU+Z NQcihlrr+sLSjL0DC9S+HlFlRRbNx1gZpv6GppyJBI9rBaZmBgBTExkDrRhbX64X+PKg l8mA== X-Gm-Message-State: APjAAAUG6lZUNbjb+dD3glQL1lFrEin++O3KwPOxKXlVhVD/nd3IGLFv r2VXOkEcXf5U+SVrj9ty8CmkrjHAl+VoSROlhDE= X-Google-Smtp-Source: APXvYqzpc2h9jpUCodzOkaKdDJjjZM8itrSvWPNDKAcJvhYbUWMf4zn2+0r1408XQPHyy98KZt3TkfsfH2+NYjTL2w4= X-Received: by 2002:a63:1c66:: with SMTP id c38mr5983922pgm.368.1575670446054; Fri, 06 Dec 2019 14:14:06 -0800 (PST) Date: Fri, 6 Dec 2019 14:13:40 -0800 In-Reply-To: <20191206221351.38241-1-samitolvanen@google.com> Message-Id: <20191206221351.38241-5-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20191206221351.38241-1-samitolvanen@google.com> X-Mailer: git-send-email 2.24.0.393.g34dc348eaf-goog Subject: [PATCH v6 04/15] arm64: kernel: avoid x18 in __cpu_soft_restart From: Sami Tolvanen To: Will Deacon , Catalin Marinas , Steven Rostedt , Masami Hiramatsu , Ard Biesheuvel , Mark Rutland Cc: Dave Martin , Kees Cook , Laura Abbott , Marc Zyngier , Nick Desaulniers , Jann Horn , Miguel Ojeda , Masahiro Yamada , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Sami Tolvanen Content-Type: text/plain; charset="UTF-8" From: Ard Biesheuvel The code in __cpu_soft_restart() uses x18 as an arbitrary temp register, which will shortly be disallowed. So use x8 instead. Link: https://patchwork.kernel.org/patch/9836877/ Signed-off-by: Ard Biesheuvel [Sami: updated commit message] Signed-off-by: Sami Tolvanen Reviewed-by: Mark Rutland Reviewed-by: Kees Cook --- arch/arm64/kernel/cpu-reset.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/cpu-reset.S b/arch/arm64/kernel/cpu-reset.S index 6ea337d464c4..32c7bf858dd9 100644 --- a/arch/arm64/kernel/cpu-reset.S +++ b/arch/arm64/kernel/cpu-reset.S @@ -42,11 +42,11 @@ ENTRY(__cpu_soft_restart) mov x0, #HVC_SOFT_RESTART hvc #0 // no return -1: mov x18, x1 // entry +1: mov x8, x1 // entry mov x0, x2 // arg0 mov x1, x3 // arg1 mov x2, x4 // arg2 - br x18 + br x8 ENDPROC(__cpu_soft_restart) .popsection -- 2.24.0.393.g34dc348eaf-goog