From patchwork Mon Jan 23 13:46:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Rutland X-Patchwork-Id: 13112241 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 E731DC38142 for ; Mon, 23 Jan 2023 13:49:05 +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:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Qs7anBZirhAoxvAVLk/yPAGJea8Mr7EZFxrmhIwkU+k=; b=pBc/YU3DTi9qaK 8S7EOlz8UgLGu1mstzqMbZxHWUqebfxM4azSh1KO7pdybceEA0fS48iMGS8oQ0qf33HIQlwwxwN9g Ya1etiwgKPXNaAovTJkQ6L5paMGoOsc1fekqOoA++fY6sUpTcd8UtYC2517aQi4s+2NPo156kTGjM pWjQbaIX//JZbqmQFa9LH+IEL9xwcqeiUazwnLnZbvpW4wbZPkZbC8xoF+KK5wSxMfnOoSlPMASG2 Ozbw7xJE3XGF3BGUTN/sA33S34E1GetZD/13087xi8vgWYvbGd1JT4A6UT9HpatCWcBz+H5izVqZZ 9nyxt7Thwzfjgu6IotEQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pJxB7-00HQ0H-TA; Mon, 23 Jan 2023 13:48:06 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pJx9W-00HPIz-BJ for linux-arm-kernel@lists.infradead.org; Mon, 23 Jan 2023 13:46:28 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C92BE1655; Mon, 23 Jan 2023 05:47:06 -0800 (PST) Received: from lakrids.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 35B5A3F64C; Mon, 23 Jan 2023 05:46:23 -0800 (PST) From: Mark Rutland To: linux-arm-kernel@lists.infradead.org Cc: catalin.marinas@arm.com, lenb@kernel.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, mark.rutland@arm.com, mhiramat@kernel.org, ndesaulniers@google.com, ojeda@kernel.org, peterz@infradead.org, rafael.j.wysocki@intel.com, revest@chromium.org, robert.moore@intel.com, rostedt@goodmis.org, will@kernel.org Subject: [PATCH v3 5/8] arm64: insn: Add helpers for BTI Date: Mon, 23 Jan 2023 13:46:00 +0000 Message-Id: <20230123134603.1064407-6-mark.rutland@arm.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230123134603.1064407-1-mark.rutland@arm.com> References: <20230123134603.1064407-1-mark.rutland@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230123_054626_516449_9D3BC35F X-CRM114-Status: UNSURE ( 8.65 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org In subsequent patches we'd like to check whether an instruction is a BTI. In preparation for this, add basic instruction helpers for BTI instructions. Per ARM DDI 0487H.a section C6.2.41, BTI is encoded in binary as follows, MSB to LSB: 1101 0101 000 0011 0010 0100 xx01 1111 Where the `xx` bits encode J/C/JC: 00 : (omitted) 01 : C 10 : J 11 : JC Signed-off-by: Mark Rutland Cc: Catalin Marinas Cc: Florent Revest Cc: Masami Hiramatsu Cc: Peter Zijlstra Cc: Steven Rostedt Cc: Will Deacon --- arch/arm64/include/asm/insn.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/include/asm/insn.h b/arch/arm64/include/asm/insn.h index aaf1f52fbf3e..139a88e4e852 100644 --- a/arch/arm64/include/asm/insn.h +++ b/arch/arm64/include/asm/insn.h @@ -420,6 +420,7 @@ __AARCH64_INSN_FUNCS(sb, 0xFFFFFFFF, 0xD50330FF) __AARCH64_INSN_FUNCS(clrex, 0xFFFFF0FF, 0xD503305F) __AARCH64_INSN_FUNCS(ssbb, 0xFFFFFFFF, 0xD503309F) __AARCH64_INSN_FUNCS(pssbb, 0xFFFFFFFF, 0xD503349F) +__AARCH64_INSN_FUNCS(bti, 0xFFFFFF3F, 0xD503241f) #undef __AARCH64_INSN_FUNCS