From patchwork Wed Nov 6 09:04:46 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Federico Serafini X-Patchwork-Id: 13864125 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 lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 E15B9D3E798 for ; Wed, 6 Nov 2024 09:05:56 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.830621.1245687 (Exim 4.92) (envelope-from ) id 1t8byt-0002FF-19; Wed, 06 Nov 2024 09:05:39 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 830621.1245687; Wed, 06 Nov 2024 09:05:39 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1t8bys-0002Eo-TV; Wed, 06 Nov 2024 09:05:38 +0000 Received: by outflank-mailman (input) for mailman id 830621; Wed, 06 Nov 2024 09:05:37 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1t8byr-0001yg-Pp for xen-devel@lists.xenproject.org; Wed, 06 Nov 2024 09:05:37 +0000 Received: from support.bugseng.com (mail.bugseng.com [162.55.131.47]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 483db99a-9c1e-11ef-99a3-01e77a169b0f; Wed, 06 Nov 2024 10:05:34 +0100 (CET) Received: from truciolo.bugseng.com (unknown [78.210.84.32]) by support.bugseng.com (Postfix) with ESMTPSA id 651304EE0756; Wed, 6 Nov 2024 10:05:33 +0100 (CET) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 483db99a-9c1e-11ef-99a3-01e77a169b0f X-Custom-Connection: eyJyZW1vdGVpcCI6IjE2Mi41NS4xMzEuNDciLCJoZWxvIjoic3VwcG9ydC5idWdzZW5nLmNvbSJ9 X-Custom-Transaction: eyJpZCI6IjQ4M2RiOTlhLTljMWUtMTFlZi05OWEzLTAxZTc3YTE2OWIwZiIsInRzIjoxNzMwODgzOTM0Ljg4NDk5LCJzZW5kZXIiOiJmZWRlcmljby5zZXJhZmluaUBidWdzZW5nLmNvbSIsInJlY2lwaWVudCI6Inhlbi1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0Lm9yZyJ9 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=bugseng.com; s=mail; t=1730883934; bh=etnDQcjFydFYuWuYvuYIRamKA/E4dTICXmJpGZ5Jwgw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gblwzgjfOWd/OUhrCVpzeYtzQDSANzxfL+AAzVK2YZJ0wIUNCzAG1kzJTF7a1yxwj 0IGEmyWWSsWP39JNj78MA1bVwx73LxWrmbkrTzIFCo4Ik+Gdy1QGJbTrlQe/P9aHr3 evMCCxUOFGX+FBKLgoLoo/bXLXDERw2XJt+f15FZ1qrwkEGPsv4W5P6bmHTQG4Mi22 sBpMzsxNU6wIf6SOr5Z9bJPnmZTYY/BuKpydK/mzAV+AyR47q9xs8/SbXXClp2E76x /WcU7dsJ11Q25MtttZAEnXPbLsQH50MEk889b/rdo7ztGsDzuIfTEqlwR/iLqpJa1R NJosTV60UEzJw== From: Federico Serafini To: xen-devel@lists.xenproject.org Cc: consulting@bugseng.com, Federico Serafini , Jan Beulich , Andrew Cooper , =?utf-8?q?Roger_Pau_Monn=C3=A9?= , Stefano Stabellini Subject: [XEN PATCH 2/3] x86/emul: use pseudo keyword fallthrough Date: Wed, 6 Nov 2024 10:04:46 +0100 Message-ID: <9be1812e391ce893afa028c05614b74cddb197b7.1730880832.git.federico.serafini@bugseng.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: MIME-Version: 1.0 Make explicit the fallthrough intetion by adding the pseudo keyword where missing and refactor comments not following the agreed syntax. This satisfies the requirements to deviate violations of MISRA C:2012 Rule 16.3 "An unconditional break statement shall terminate every switch-clause". No functional change. Signed-off-by: Federico Serafini Reviewed-by: Stefano Stabellini --- xen/arch/x86/x86_emulate/decode.c | 6 ++++-- xen/arch/x86/x86_emulate/x86_emulate.c | 2 ++ 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/xen/arch/x86/x86_emulate/decode.c b/xen/arch/x86/x86_emulate/decode.c index 32b9276dc5..0a0751f2ed 100644 --- a/xen/arch/x86/x86_emulate/decode.c +++ b/xen/arch/x86/x86_emulate/decode.c @@ -1356,7 +1356,8 @@ int x86emul_decode(struct x86_emulate_state *s, --disp8scale; break; } - /* vcvt{,t}s{s,d}2usi need special casing: fall through */ + /* vcvt{,t}s{s,d}2usi need special casing. */ + fallthrough; case 0x2c: /* vcvtts{s,d}2si need special casing */ case 0x2d: /* vcvts{s,d}2si need special casing */ if ( evex_encoded() ) @@ -1530,7 +1531,8 @@ int x86emul_decode(struct x86_emulate_state *s, disp8scale -= 1 + (s->evex.pfx == vex_66); break; } - /* vcvt{,t}sh2usi needs special casing: fall through */ + /* vcvt{,t}sh2usi needs special casing. */ + fallthrough; case 0x2c: case 0x2d: /* vcvt{,t}sh2si need special casing */ disp8scale = 1; break; diff --git a/xen/arch/x86/x86_emulate/x86_emulate.c b/xen/arch/x86/x86_emulate/x86_emulate.c index 30674ec301..c38984b201 100644 --- a/xen/arch/x86/x86_emulate/x86_emulate.c +++ b/xen/arch/x86/x86_emulate/x86_emulate.c @@ -1460,6 +1460,7 @@ x86_emulate( d = (d & ~DstMask) | DstMem; /* Becomes a normal DstMem operation from here on. */ + fallthrough; case DstMem: generate_exception_if(ea.type == OP_MEM && evex.z, X86_EXC_UD); if ( state->simd_size != simd_none ) @@ -1942,6 +1943,7 @@ x86_emulate( break; } generate_exception_if((modrm_reg & 7) != 0, X86_EXC_UD); + fallthrough; case 0x88 ... 0x8b: /* mov */ case 0xa0 ... 0xa1: /* mov mem.offs,{%al,%ax,%eax,%rax} */ case 0xa2 ... 0xa3: /* mov {%al,%ax,%eax,%rax},mem.offs */