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 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 540B6C27C43 for ; Tue, 28 May 2024 23:54:44 +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:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=NzRLzkvgx4Nvn4Ke86KGZ5m6GgeWQVPne9w0q4iEYpM=; b=hJuAabvT9qNsz1 Q+kcIXIJ4KBSWac84APBkLGPkh6QIUd628glpTAIGxpw7ILtUM8bBNqU9pYiQxYfxUttleVTKeMvn 83lakPkWk/qV29p4M0vPg4ud8cvWwdDBiTV2nwnDxLFLxI5uNkfGyjQnqyAKbwq7A12VaICFSIbb4 IVfxF+0aCmxHIGmi79vWaaEXqVVuj0Tz0LwZ2d2wcPVeQpsqQWc09y4qrcbnbdu8c8qGV6Ky+l3nI NWU7jt+a+LI8iqwGffisFZMdU9iEhqp1vQv5mWFR0BnlgZbW6Y7ttVAlTFKDFF7JOsmDoF0SzDpv/ dtjaP3DbC4Y81EPixMXQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sC6eH-00000002LxU-3evj; Tue, 28 May 2024 23:54:33 +0000 Received: from mail-ed1-x532.google.com ([2a00:1450:4864:20::532]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sC6eD-00000002Lvm-1huy for linux-riscv@lists.infradead.org; Tue, 28 May 2024 23:54:31 +0000 Received: by mail-ed1-x532.google.com with SMTP id 4fb4d7f45d1cf-57a034697fbso241025a12.0 for ; Tue, 28 May 2024 16:54:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1716940466; x=1717545266; darn=lists.infradead.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=e000vksGZKxcpTxpZnBmsIz0xFc2hPH9avlD+baB/tQ=; b=GdTJbwSe6JBLO9nnEQDDt88mR/2glFfBfqSnpifb0TPojYsYyxqnqbzWqOiWRhzVZc CqqYTzO4qGBG2XTFOUCwi48ML5bIoEzmB/p6N3R57w2koWLfD039BgHTSOkFuriEAPNO OzjXeht5dSwFmur8kh2kgJVqPz9nCFjspkJbgwg385+OX0GuuHGUtaL1rTW05pywimJg 2Qj0r+fiTJDcUM9NrREJLZQw9NOUx3T6fCrwC91hTqygCisi8OH0bCgu2lVhO9Uts3SR oQh5nIWR2LCxEEoc/VnDtVP0BU7/j6eptLR+tyiPTjOW7KE2VzWfb/JMERaSaXYk5eC8 yGRQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716940466; x=1717545266; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=e000vksGZKxcpTxpZnBmsIz0xFc2hPH9avlD+baB/tQ=; b=TJza+BFDNpgfLCxAuU0vZbZoUa+bHhPJ0JMULpm9Vh8Jy+8sYO13U0JrkNgx08Dzhk N5bsiA1TIeZOTOOKQnhkNnZOovKFgKtuPuPS0/qALHZKcDS+YKeU/+110DZ7U5m/tnH2 /5qNHaVGos2DBz984nQqlNclN6qyuOSpY6izEi0e5MH0c62QhgRg16OxkBAlc7jG6ySg GNMRg/BbvsT+DPWSiyNXbFNxxtDK/xHT/D9EGI/FlZMwKi/oPIv2EOWpCUMfp2syLn3F NTeOZ1Nq7BGMWhAE1hMRZdJvWBOFG8PuYEufM54dkRLrK4bMOISjY/kahvKnh3Vv7Bx3 U7IQ== X-Forwarded-Encrypted: i=1; AJvYcCXQ0C5M8UP5o6uuX7/bxx2uLJJK4qLqr/LZRLdCjS8xvLvxJW3WbcpdaifhxJguDpDfR3LHPZC8zjGQWlkuG535BMwNS1Lq4/qjkie2LsHy X-Gm-Message-State: AOJu0YziiK5B/l1W9vt3exnCUS4BkCsh7ZILtxI3tHjp8wi8Nm+yplMV xKP4IDQzsO1fkWxeHFZMJclEsZRJqueGAV6cnFBxOxBznbGQvRIr X-Google-Smtp-Source: AGHT+IHsWsOkBOksuCIUt51kqHsxAps4Tg6mOyc5noJl3q1Tf55mM9iZjLhMWu87KAeA5fz6kMcg+w== X-Received: by 2002:a50:9b12:0:b0:572:67d9:3400 with SMTP id 4fb4d7f45d1cf-578519ba232mr8723411a12.39.1716940466319; Tue, 28 May 2024 16:54:26 -0700 (PDT) Received: from andrea ([151.76.32.59]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-57852339fc4sm7658198a12.15.2024.05.28.16.54.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 May 2024 16:54:25 -0700 (PDT) Date: Wed, 29 May 2024 01:54:21 +0200 From: Andrea Parri To: Alexandre Ghiti Cc: Jonathan Corbet , Paul Walmsley , Palmer Dabbelt , Albert Ou , Peter Zijlstra , Ingo Molnar , Will Deacon , Waiman Long , Boqun Feng , Arnd Bergmann , Leonardo Bras , Guo Ren , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-arch@vger.kernel.org Subject: Re: [PATCH 2/7] riscv: Implement cmpxchg8/16() using Zabha Message-ID: References: <20240528151052.313031-1-alexghiti@rivosinc.com> <20240528151052.313031-3-alexghiti@rivosinc.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20240528151052.313031-3-alexghiti@rivosinc.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240528_165429_487742_B8EE4F6C X-CRM114-Status: UNSURE ( 7.67 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org > +zabha: \ > + __asm__ __volatile__ ( \ > + prepend \ > + " amocas" cas_sfx " %0, %z2, %1\n" \ > + append \ > + : "+&r" (r), "+A" (*(p)) \ > + : "rJ" (n) \ > + : "memory"); \ Couldn't a platform have Zabha but not have Zacas? I don't see how this asm goto could work in such case, what am I missing? Andrea _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv