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=-16.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 12B6BC43463 for ; Fri, 18 Sep 2020 02:41:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D8D90214D8 for ; Fri, 18 Sep 2020 02:41:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600396865; bh=Ym7BvZ8z7yk7xgSFmEljGwUGi5K68zqHJ372FL0VZ5o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=rtP9MdctifYGKWLeP5Y0FlfTeZ5sdG0hiex7bzoSq10plCivTfX8r/nTLh54dsjyr pK0XrILvxQXTazBv6KoS1uuOl47JuHYE8Xt6OQh3X0G/IZhSRr4SRNfna9YzUhpiZ9 KSf9c0OkIxZc2/Z47u8ciBGR51bRZWdyvWrEUvms= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730038AbgIRClE (ORCPT ); Thu, 17 Sep 2020 22:41:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:36914 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727180AbgIRCL2 (ORCPT ); Thu, 17 Sep 2020 22:11:28 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6AD7623447; Fri, 18 Sep 2020 02:11:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600395087; bh=Ym7BvZ8z7yk7xgSFmEljGwUGi5K68zqHJ372FL0VZ5o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=W/PCmqtxLbJqOdZHKGz02tzAmszGe4bY6Z4YVsn9vw2dZfk1Ontri0Xj+NoHgwInt rM/slR++Duw8YexXTuuF7zXh9vimQ8NjO6s/ma/uxr0UUQgbCP8YBvYzKROXovfMPI vaCRX6O8+AvGK2PPeKY6wHm0RZWQ/uCOTK+KLlkQ= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Anshuman Khandual , Catalin Marinas , Will Deacon , Marc Zyngier , Mark Rutland , James Morse , Suzuki K Poulose , linux-arm-kernel@lists.infradead.org, Sasha Levin Subject: [PATCH AUTOSEL 4.19 169/206] arm64/cpufeature: Drop TraceFilt feature exposure from ID_DFR0 register Date: Thu, 17 Sep 2020 22:07:25 -0400 Message-Id: <20200918020802.2065198-169-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200918020802.2065198-1-sashal@kernel.org> References: <20200918020802.2065198-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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