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 38943C6FA8B for ; Fri, 23 Sep 2022 16:30:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232070AbiIWQaY (ORCPT ); Fri, 23 Sep 2022 12:30:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38912 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229538AbiIWQaY (ORCPT ); Fri, 23 Sep 2022 12:30:24 -0400 Received: from mail.skyhub.de (mail.skyhub.de [5.9.137.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D7F9FF1917; Fri, 23 Sep 2022 09:30:22 -0700 (PDT) Received: from zn.tnic (p200300ea9733e795329c23fffea6a903.dip0.t-ipconnect.de [IPv6:2003:ea:9733:e795:329c:23ff:fea6:a903]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 709C11EC0646; Fri, 23 Sep 2022 18:30:17 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1663950617; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=qw+3y1mCKoDwYTkZXX6OHqjYOHz56e8OXYAVyYAqElg=; b=jEjlAAoMPEhJ7BodIBhX2FOFktAKUxD5mgXRW9COoJFiwG1EZpw1usN2QkQQ84lqkd6e5D RoyIjhH6xytSE9QUa8VTpTO7q43cW5CcL7YYQlnaptzW6wOyYI6UNrtjgjSGx3PmXDmWuJ SvWOAj3APjubsujGZjMuOgmvC5rGoZc= Date: Fri, 23 Sep 2022 18:30:13 +0200 From: Borislav Petkov To: K Prateek Nayak Cc: linux-kernel@vger.kernel.org, rafael@kernel.org, lenb@kernel.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, dave.hansen@linux.intel.com, tglx@linutronix.de, andi@lisas.de, puwen@hygon.cn, mario.limonciello@amd.com, peterz@infradead.org, rui.zhang@intel.com, gpiccoli@igalia.com, daniel.lezcano@linaro.org, ananth.narayan@amd.com, gautham.shenoy@amd.com, Calvin Ong , "Rafael J . Wysocki" , stable@vger.kernel.org Subject: Re: [PATCH v2] x86,acpi: Limit "Dummy wait" workaround to older AMD and Intel processors Message-ID: References: <20220923153801.9167-1-kprateek.nayak@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org On Fri, Sep 23, 2022 at 09:55:02PM +0530, K Prateek Nayak wrote: > Yes, I did see the patch, but Andreas replied to Dave's patch attached > in v1 saying that he had seen this issue with AMD Athlon on a VIA > chipset back in 2006. (https://lore.kernel.org/lkml/Yyy6l94G0O2B7Yh1@rhlx01.hs-esslingen.de/) > Therefore, Dave's patch is not sufficient. Well, AFAICT, that box is old and dead. And I'm being told that the AMD machines which we care for and which are still alive should not need the dummy read. Which means, we could try the simple fix first and see who complains. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette