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 E25F1C433EF for ; Wed, 9 Mar 2022 16:13:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234934AbiCIQOz (ORCPT ); Wed, 9 Mar 2022 11:14:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37006 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235868AbiCIQJQ (ORCPT ); Wed, 9 Mar 2022 11:09:16 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D857814345C; Wed, 9 Mar 2022 08:06:53 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 3D6A16167D; Wed, 9 Mar 2022 16:06:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4F82CC340E8; Wed, 9 Mar 2022 16:06:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1646842007; bh=WHsGSOjBm9ueKXa9npS/SWuABsLbuATTUD6ydwapvYs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sHAmZipBEUWmsh5arxoVuWrrS7m9rt42p/ipNcKGbw5A3XTKyb2p9owqstUT1HtEu UYjZHnIifbkVSWROh1pEAyEPtL25wRyMG6JyWwoF/zvE9cE09osG3h5772V5QPiMOw dzKHvCpBohIdWOVky/dTfDmVPLj+k+ymxM8xXaWg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Peter Zijlstra (Intel)" , Borislav Petkov , Josh Poimboeuf , Alexei Starovoitov Subject: [PATCH 5.15 01/43] x86,bugs: Unconditionally allow spectre_v2=retpoline,amd Date: Wed, 9 Mar 2022 16:59:45 +0100 Message-Id: <20220309155859.779166819@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220309155859.734715884@linuxfoundation.org> References: <20220309155859.734715884@linuxfoundation.org> User-Agent: quilt/0.66 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Peter Zijlstra commit f8a66d608a3e471e1202778c2a36cbdc96bae73b upstream. Currently Linux prevents usage of retpoline,amd on !AMD hardware, this is unfriendly and gets in the way of testing. Remove this restriction. Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Borislav Petkov Acked-by: Josh Poimboeuf Tested-by: Alexei Starovoitov Link: https://lore.kernel.org/r/20211026120310.487348118@infradead.org Signed-off-by: Greg Kroah-Hartman --- arch/x86/kernel/cpu/bugs.c | 7 ------- 1 file changed, 7 deletions(-) --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -882,13 +882,6 @@ static enum spectre_v2_mitigation_cmd __ return SPECTRE_V2_CMD_AUTO; } - if (cmd == SPECTRE_V2_CMD_RETPOLINE_AMD && - boot_cpu_data.x86_vendor != X86_VENDOR_HYGON && - boot_cpu_data.x86_vendor != X86_VENDOR_AMD) { - pr_err("retpoline,amd selected but CPU is not AMD. Switching to AUTO select\n"); - return SPECTRE_V2_CMD_AUTO; - } - spec_v2_print_cond(mitigation_options[i].option, mitigation_options[i].secure); return cmd;