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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1107EC6FD18 for ; Fri, 31 Mar 2023 13:34:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232692AbjCaNeJ convert rfc822-to-8bit (ORCPT ); Fri, 31 Mar 2023 09:34:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34388 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232782AbjCaNeH (ORCPT ); Fri, 31 Mar 2023 09:34:07 -0400 Received: from gloria.sntech.de (gloria.sntech.de [185.11.138.130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DFC691BF62 for ; Fri, 31 Mar 2023 06:34:03 -0700 (PDT) Received: from ip4d1634d3.dynamic.kabel-deutschland.de ([77.22.52.211] helo=diego.localnet) by gloria.sntech.de with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1piEtE-0003tp-DL; Fri, 31 Mar 2023 15:34:00 +0200 From: Heiko =?ISO-8859-1?Q?St=FCbner?= To: linux-riscv@lists.infradead.org, palmer@dabbelt.com, anup@brainfault.org, atishp@atishpatra.org, kvm-riscv@lists.infradead.org, kvm@vger.kernel.org Cc: vineetg@rivosinc.com, greentime.hu@sifive.com, guoren@linux.alibaba.com, Andy Chiu , Paul Walmsley , Albert Ou , Nathan Chancellor , Nick Desaulniers , Tom Rix , Andy Chiu Subject: Re: [PATCH -next v17 19/20] riscv: detect assembler support for .option arch Date: Fri, 31 Mar 2023 15:33:59 +0200 Message-ID: <1936189.yKVeVyVuyW@diego> In-Reply-To: <20230327164941.20491-20-andy.chiu@sifive.com> References: <20230327164941.20491-1-andy.chiu@sifive.com> <20230327164941.20491-20-andy.chiu@sifive.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset="iso-8859-1" Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Am Montag, 27. März 2023, 18:49:39 CEST schrieb Andy Chiu: > Some extensions use .option arch directive to selectively enable certain > extensions in parts of its assembly code. For example, Zbb uses it to > inform assmebler to emit bit manipulation instructions. However, > supporting of this directive only exist on GNU assembler and has not > landed on clang at the moment, making TOOLCHAIN_HAS_ZBB depend on > AS_IS_GNU. > > While it is still under review at https://reviews.llvm.org/D123515, the > upcoming Vector patch also requires this feature in assembler. Thus, > provide Kconfig AS_HAS_OPTION_ARCH to detect such feature. Then > TOOLCHAIN_HAS_XXX will be turned on automatically when the feature land. > > Suggested-by: Nathan Chancellor > Signed-off-by: Andy Chiu > Reviewed-by: Conor Dooley > Reviewed-by: Nathan Chancellor Reviewed-by: Heiko Stuebner Tested-by: Heiko Stuebner