From patchwork Mon Mar 27 07:58:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Li, Xin3" X-Patchwork-Id: 13188733 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 BE640C761AF for ; Mon, 27 Mar 2023 08:24:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232836AbjC0IYr (ORCPT ); Mon, 27 Mar 2023 04:24:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59666 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232999AbjC0IYf (ORCPT ); Mon, 27 Mar 2023 04:24:35 -0400 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B63432D63; Mon, 27 Mar 2023 01:24:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1679905473; x=1711441473; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=4lCYxmSNxB+oTxZx5ZOjZmvc7OZS0xLkR1RLWDKH14M=; b=Y4pZbYuQEnePmFsRAnGKw6Ek/Iogi1dP8YxEgpemugKr6X2D40NRiXdo 54J0iwE2prgF1Z/EPG8zHjvhltGZI/rBq7NhuidbKon6bGaRhKZykVBjT RRSvqofXHyxA15fMMDNf95nNgo7/nCko43P64RvzKFUaUf3bWt6cxbznO 49EaW0IWy3EjonJk1v7UZRtevH8YuICzmicyURyM29gIxOjT1iKhb+pXQ wkHThgwdl35ARYeqqlo0mxm8H2yCycU8A03b+inr4bLBa9GiPLRGjBM5n XYCfwxFdkBGqk5qsV6nVTpML6tGjLVee5jooDAu0F+WTD2eI9q5TVsxCw w==; X-IronPort-AV: E=McAfee;i="6600,9927,10661"; a="338930158" X-IronPort-AV: E=Sophos;i="5.98,294,1673942400"; d="scan'208";a="338930158" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Mar 2023 01:24:32 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10661"; a="713787056" X-IronPort-AV: E=Sophos;i="5.98,294,1673942400"; d="scan'208";a="713787056" Received: from unknown (HELO fred..) ([172.25.112.68]) by orsmga008.jf.intel.com with ESMTP; 27 Mar 2023 01:24:32 -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 v6 08/33] x86/objtool: teach objtool about ERETU and ERETS Date: Mon, 27 Mar 2023 00:58:13 -0700 Message-Id: <20230327075838.5403-9-xin3.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230327075838.5403-1-xin3.li@intel.com> References: <20230327075838.5403-1-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;