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 89B54C0015E for ; Mon, 10 Jul 2023 19:25:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231608AbjGJTZb (ORCPT ); Mon, 10 Jul 2023 15:25:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41262 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231230AbjGJTZP (ORCPT ); Mon, 10 Jul 2023 15:25:15 -0400 Received: from mail-ej1-x634.google.com (mail-ej1-x634.google.com [IPv6:2a00:1450:4864:20::634]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B1C2DE60 for ; Mon, 10 Jul 2023 12:25:00 -0700 (PDT) Received: by mail-ej1-x634.google.com with SMTP id a640c23a62f3a-9939fbb7191so968592566b.0 for ; Mon, 10 Jul 2023 12:25:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1689017098; x=1691609098; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Z71M3kv4pOhHERmm48IRm9ZZKlLgpwDQJ/Fo9wvNP5c=; b=ASZ3K3ti6Bg/EbHuGo8ohRbr1fAme2CHAabDjiV/uN16VxosIlNQ6g9LHfm3xurH/c lnEZhyrQ5BpkOGbo0OVMsFbLSGtiKDrFdhS6Ct/trK1XyUBMl1sIPlDvaueYOklhMhBH LsVtQTFSqIldpa1nRu8firvs9QmQG5792VyW0EmunqskCC0IpXzSYyeRT0PPVsQJGoxM fDsla/SjoRdP5k4jl7hEMhe59+kRMbneOuStHbBmghQORD9WGjdtlwlFWnQ00Cj2jwFa DOLb86EDnRYJ+z6nA8mxVcwoLtAeiY1TLcjNh7CVzxtevL1YQ+y9jdX23HC5SvWfanjW Hhsw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689017098; x=1691609098; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Z71M3kv4pOhHERmm48IRm9ZZKlLgpwDQJ/Fo9wvNP5c=; b=RlGSFAv7A9oZJaHQH0uyoT3eZKMXAzm4L/dgVBd6aUTYIHXPGCsrY5Nrs+0IiiQLEm lP0FQGX0CnjputrsZA1WB6WdQUCaGj7xv0TtxdY/xJi+98KuvQ+rHIrESlC2gWL4CeRF CsuYEg8rYbmgVq0wJfO9i+3NspgoEkj0GQgbn9N93aZFxTBDQv6XQ27b5/zMpKwxIro/ 29Z9eVZGzJMPObegj8HHDj+E7WFezNd9yQRGtE+kc4bLmBOwalaWvsqYTsBEIuzVbDnx BJALVw/LJGRnd0iDAcdnKcfnou8/lk6JMLSVeMT0A3xadAjIhNFVw0tomnw5uWXYYM4L crXg== X-Gm-Message-State: ABy/qLbeeyM0Ppf1rhic2wQuQ/WOuaEGGeMLuzW1luSDBuQA6XGb0+NZ pNcAqGWZFDjuv9hsENqFvvAGFESaKl5i3wPt X-Google-Smtp-Source: APBJJlGthri1wuPEMGs27pEajcM7hryhEfxctXKvA699qawtyhyGJ5wNksSwjTUqpLoTCr/9vPqPrw== X-Received: by 2002:a17:907:3c0a:b0:98e:370c:be69 with SMTP id gh10-20020a1709073c0a00b0098e370cbe69mr15702590ejc.6.1689017098266; Mon, 10 Jul 2023 12:24:58 -0700 (PDT) Received: from localhost.localdomain ([46.248.82.114]) by smtp.gmail.com with ESMTPSA id w15-20020a170906480f00b0096a6be0b66dsm110076ejq.208.2023.07.10.12.24.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Jul 2023 12:24:57 -0700 (PDT) From: Uros Bizjak To: linux-kernel@vger.kernel.org, x86@kernel.org, xen-devel@lists.xenproject.org Cc: Uros Bizjak , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" Subject: [PATCH 2/3] locking/x86: Wire up sync_try_cmpxchg Date: Mon, 10 Jul 2023 21:21:55 +0200 Message-ID: <20230710192440.47140-2-ubizjak@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230710192440.47140-1-ubizjak@gmail.com> References: <20230710192440.47140-1-ubizjak@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Implement target specific support for sync_try_cmpxchg. Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: "H. Peter Anvin" Signed-off-by: Uros Bizjak --- arch/x86/include/asm/cmpxchg.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/x86/include/asm/cmpxchg.h b/arch/x86/include/asm/cmpxchg.h index d53636506134..5612648b0202 100644 --- a/arch/x86/include/asm/cmpxchg.h +++ b/arch/x86/include/asm/cmpxchg.h @@ -221,12 +221,18 @@ extern void __add_wrong_size(void) #define __try_cmpxchg(ptr, pold, new, size) \ __raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX) +#define __sync_try_cmpxchg(ptr, pold, new, size) \ + __raw_try_cmpxchg((ptr), (pold), (new), (size), "lock; ") + #define __try_cmpxchg_local(ptr, pold, new, size) \ __raw_try_cmpxchg((ptr), (pold), (new), (size), "") #define arch_try_cmpxchg(ptr, pold, new) \ __try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr))) +#define arch_sync_try_cmpxchg(ptr, pold, new) \ + __sync_try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr))) + #define arch_try_cmpxchg_local(ptr, pold, new) \ __try_cmpxchg_local((ptr), (pold), (new), sizeof(*(ptr))) -- 2.41.0