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 X-Spam-Level: X-Spam-Status: No, score=-13.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 10C40C4727F for ; Tue, 29 Sep 2020 12:25:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B944C2076A for ; Tue, 29 Sep 2020 12:25:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601382300; bh=Ym7BvZ8z7yk7xgSFmEljGwUGi5K68zqHJ372FL0VZ5o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=XKk8JAFo9V6q9Ty0Te+qXfAD4xFZPrL5+DoZaOJMTqveCajPSGE5L9wD397j7Xc15 AtQd/4SZZoGIVwwjzfNKEDwXZzayH8Jh1zygeOpotxD9ijvuAuO7E/idP7zTZ17aPl Pm2AO19laOuzKebBNYpTjMtwttvEGvplgBD1B8S4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730382AbgI2MYv (ORCPT ); Tue, 29 Sep 2020 08:24:51 -0400 Received: from mail.kernel.org ([198.145.29.99]:48450 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729722AbgI2Lew (ORCPT ); Tue, 29 Sep 2020 07:34:52 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0F25023BE3; Tue, 29 Sep 2020 11:27:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601378873; bh=Ym7BvZ8z7yk7xgSFmEljGwUGi5K68zqHJ372FL0VZ5o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YKpU8IhGRDMSbk9LmtZku70TozQFCq1Nin9QRnMscq7V9Yz4CYUf38AMzZ3yDQIT4 9n5VWCSadKVD2OR5nabJpF/lO91qSXfaulXYgx/Pf8+cdVfhVwsgNB26UBxVOlxmdO WuOwp1tV78AFB3+wHIheb35q0Bm2PpVHE8jKT7Dc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Catalin Marinas , Will Deacon , Marc Zyngier , Mark Rutland , James Morse , Suzuki K Poulose , linux-arm-kernel@lists.infradead.org, Anshuman Khandual , Sasha Levin Subject: [PATCH 4.19 169/245] arm64/cpufeature: Drop TraceFilt feature exposure from ID_DFR0 register Date: Tue, 29 Sep 2020 13:00:20 +0200 Message-Id: <20200929105955.202724762@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200929105946.978650816@linuxfoundation.org> References: <20200929105946.978650816@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Anshuman Khandual [ Upstream commit 1ed1b90a0594c8c9d31e8bb8be25a2b37717dc9e ] ID_DFR0 based TraceFilt feature should not be exposed to guests. Hence lets drop it. Cc: Catalin Marinas Cc: Will Deacon Cc: Marc Zyngier Cc: Mark Rutland Cc: James Morse Cc: Suzuki K Poulose Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Suggested-by: Mark Rutland Signed-off-by: Anshuman Khandual Reviewed-by: Suzuki K Poulose Link: https://lore.kernel.org/r/1589881254-10082-3-git-send-email-anshuman.khandual@arm.com Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- arch/arm64/kernel/cpufeature.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 095dec566275f..de6fa9b4abfa0 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -300,7 +300,7 @@ static const struct arm64_ftr_bits ftr_id_pfr0[] = { }; static const struct arm64_ftr_bits ftr_id_dfr0[] = { - ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 28, 4, 0), + /* [31:28] TraceFilt */ S_ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 24, 4, 0xf), /* PerfMon */ ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 20, 4, 0), ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 16, 4, 0), -- 2.25.1