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[23.128.96.18]) by mx.google.com with ESMTP id g2si491973ilk.84.2021.05.19.12.15.14; Wed, 19 May 2021 12:15:28 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=bY0gEpNI; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235863AbhESFwW (ORCPT + 99 others); Wed, 19 May 2021 01:52:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237145AbhESFwV (ORCPT ); Wed, 19 May 2021 01:52:21 -0400 Received: from mail-pf1-x42a.google.com (mail-pf1-x42a.google.com [IPv6:2607:f8b0:4864:20::42a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C62BEC06175F for ; Tue, 18 May 2021 22:51:00 -0700 (PDT) Received: by mail-pf1-x42a.google.com with SMTP id q2so9111706pfh.13 for ; Tue, 18 May 2021 22:51:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=hIce4Sab2WHJdY/Swtpl8EVUwcjzs30ShL3uKQAPv4Q=; b=bY0gEpNI9wdmgQlkmfmh4/zJHX1NDu5BcloRUZfgTQi2VtFFwPQDDtPiTQcgTMcsHE JMdLS3pGhcqmipuIESjVbHUvivGt9Fl583s3Wss2UrlYDyVtuYBN4vXoWb/SX92OdChC Sp+ONzVcXONMLDpnCvXeI4RHsCwwFZjm6LwDfkSNapkrRFjj+XW49KpU8ZhDUoI59e/W 2Ldv35We6jySKA2qJHngshS7fYpfQSSg2DIdMVQLdlPR5WKImhwg3ucdTNBgpz7yoDpz VW7SS0viKqnsRw5Tu/25LSix0Zgu5u5Gnh+JoVmak3LovY4WCAKZGYf7edEcmFHvxVTY W+VQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=hIce4Sab2WHJdY/Swtpl8EVUwcjzs30ShL3uKQAPv4Q=; b=ZP6wLSyCh4djSNLnvmjNNQPHQH4z7iL9231kONY738JQpyY5/Ov+hN9mvseIYnFifR Bxfnm3RgtgbYtwf8V0msFLNZo8onQiY5TTvgimdk/rW7071eNXDJjQfnmDb/KYtWpdhI O8K9cEYJS58c/Vlx6iT6Zquu2/NKrR1fakmJX2pjCAfkgQpeE3WxGLeKljN5+CKTRUzv 0qBEDiSkh3IiwC/TH8L2CxOyUlSZ6jAdn62tvBynKdpU3p6+2JOoX+gUoV++9HmvKOij kkzQDMsWEa9EstLxUEKlf2cK5NgzCtTwfdPCPhwmzV8gs9dVDS29j5v290KoySnaMkFf EDUg== X-Gm-Message-State: AOAM531nC8rkcRPcwgpX6lNN9v/6A5Cterpn3cKvA/8GctcuZRr1yJRr nrzP1brjaIDzcJsXMQBEqzY= X-Received: by 2002:aa7:8484:0:b029:2d8:a014:a0fc with SMTP id u4-20020aa784840000b02902d8a014a0fcmr9032707pfn.24.1621403460230; Tue, 18 May 2021 22:51:00 -0700 (PDT) Received: from devbox.home ([50.39.96.2]) by smtp.gmail.com with ESMTPSA id w1sm12525230pjk.10.2021.05.18.22.50.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 May 2021 22:50:59 -0700 (PDT) Date: Tue, 18 May 2021 22:50:01 -0700 From: Pawan Gupta To: Ramakrishna Saripalli Cc: linux-kernel@vger.kernel.org, x86@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, Jonathan Corbet , bsd@redhat.com Subject: Re: [v6 1/1] x86/bugs: Implement mitigation for Predictive Store Forwarding Message-ID: <20210519055001.jtos5a4nu6j6kum2@devbox.home> References: <20210517220059.6452-1-rsaripal@amd.com> <20210517220059.6452-2-rsaripal@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Disposition: inline In-Reply-To: <20210517220059.6452-2-rsaripal@amd.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 17.05.2021 17:00, Ramakrishna Saripalli wrote: >From: Ramakrishna Saripalli [...] >--- a/arch/x86/include/asm/nospec-branch.h >+++ b/arch/x86/include/asm/nospec-branch.h >@@ -198,6 +198,12 @@ enum ssb_mitigation { > SPEC_STORE_BYPASS_SECCOMP, > }; > >+/* The Predictive Store forward control variant */ >+enum psf_mitigation { >+ PREDICTIVE_STORE_FORWARD_NONE, >+ PREDICTIVE_STORE_FORWARD_DISABLE, >+}; >+ This can be moved to bugs.c which is the only user of psf_mitigation. Thanks, Pawan