From patchwork Mon Apr 10 08:14:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Li, Xin3" X-Patchwork-Id: 13206167 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 17D9EC77B6F for ; Mon, 10 Apr 2023 08:41:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229759AbjDJIlR (ORCPT ); Mon, 10 Apr 2023 04:41:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49382 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229704AbjDJIlG (ORCPT ); Mon, 10 Apr 2023 04:41:06 -0400 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6844D40D9; Mon, 10 Apr 2023 01:41:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1681116065; x=1712652065; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=4lCYxmSNxB+oTxZx5ZOjZmvc7OZS0xLkR1RLWDKH14M=; b=LLrqgmjWy2L3uZZoF3vDx4gp/YMNkJ+zQUB2bJGW8Ac1HQPSscDcoI+l Yxg0VENINCpcfLkgMu/vDY55Js+drF8EouG1HvWJoyLM87vF1kkQ5sJP3 +WopWkulCshowSPSNgXTC3mEBLyT2ax1+mb4C3rKM04lyq7eZOF4sM9R4 I1aKY90K7BiHu8X+ylZF6BXdaf05pUNgEq/JEVSjQVFXXaX5hzg7YE11z NTO5t5J56+aN8YYq6afl48P5uvZi17MophQql4iUh6GkWFc58rOUEGU5v NvPzk3HwgDc4zqIJjAUv1egup10dsChDgIvDcmVQ9pXjFF7tlR4M13I8I Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10675"; a="342077945" X-IronPort-AV: E=Sophos;i="5.98,333,1673942400"; d="scan'208";a="342077945" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Apr 2023 01:41:03 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10675"; a="799436266" X-IronPort-AV: E=Sophos;i="5.98,333,1673942400"; d="scan'208";a="799436266" Received: from unknown (HELO fred..) ([172.25.112.68]) by fmsmga002.fm.intel.com with ESMTP; 10 Apr 2023 01:41:03 -0700 From: Xin Li To: linux-kernel@vger.kernel.org, x86@kernel.org, kvm@vger.kernel.org Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, peterz@infradead.org, andrew.cooper3@citrix.com, seanjc@google.com, pbonzini@redhat.com, ravi.v.shankar@intel.com, jiangshanlai@gmail.com, shan.kang@intel.com Subject: [PATCH v8 08/33] x86/objtool: teach objtool about ERETU and ERETS Date: Mon, 10 Apr 2023 01:14:13 -0700 Message-Id: <20230410081438.1750-9-xin3.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230410081438.1750-1-xin3.li@intel.com> References: <20230410081438.1750-1-xin3.li@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: "H. Peter Anvin (Intel)" Update the objtool decoder to know about the ERETU and ERETS instructions (type INSN_CONTEXT_SWITCH.) Signed-off-by: H. Peter Anvin (Intel) Tested-by: Shan Kang Signed-off-by: Xin Li --- tools/objtool/arch/x86/decode.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/tools/objtool/arch/x86/decode.c b/tools/objtool/arch/x86/decode.c index 9ef024fd648c..8e9c802f78ec 100644 --- a/tools/objtool/arch/x86/decode.c +++ b/tools/objtool/arch/x86/decode.c @@ -509,11 +509,20 @@ int arch_decode_instruction(struct objtool_file *file, const struct section *sec if (op2 == 0x01) { - if (modrm == 0xca) - insn->type = INSN_CLAC; - else if (modrm == 0xcb) - insn->type = INSN_STAC; - + switch (insn_last_prefix_id(&ins)) { + case INAT_PFX_REPE: + case INAT_PFX_REPNE: + if (modrm == 0xca) + /* eretu/erets */ + insn->type = INSN_CONTEXT_SWITCH; + break; + default: + if (modrm == 0xca) + insn->type = INSN_CLAC; + else if (modrm == 0xcb) + insn->type = INSN_STAC; + break; + } } else if (op2 >= 0x80 && op2 <= 0x8f) { insn->type = INSN_JUMP_CONDITIONAL;