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=-9.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 50A1DC433DB for ; Tue, 23 Mar 2021 09:18:36 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D26D8619BD for ; Tue, 23 Mar 2021 09:18:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D26D8619BD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:Message-ID:References:In-Reply-To:Subject:Cc:To:From :Date:MIME-Version:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=AvbiDmWZjs5jxwNkd6XIuHcdWqda+M6yyo6j4H933zA=; b=Rgyq31G91hRT4FxfOqH9NvR5P S1Nw4Jg/m14ePwiUTsiA8Ki4jAKtGfb/79yNiRF6R4pYHms9i0nXtkdfnUzeFyGY3xDC2Fj9r2LxE hkqYyyeduQYKevryaGXe5BONDuHzHQu61tfUTNszQ4AFVe7XQiKwjDswCEILzqu7h+V7YMPemNIjN miKvqYiRlwRp2+yyEMUpkHzlW9huJ3iYGzrUrac47ZiDpNUXeV+ItLiVEItUrSMjSCJKHmRR+AaVE wfCdEszSpOpWJa1R5KysKGNd9ZdRPbwtftEJ7tEo3EcxkZDPUSh1hm4lRj2SMLIJ6kzYMPU0/VSHk wof7aZ5PQ==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lOd9x-00EQYM-OJ; Tue, 23 Mar 2021 09:17:09 +0000 Received: from mail.kernel.org ([198.145.29.99]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lOd9s-00EQWc-TQ for linux-arm-kernel@lists.infradead.org; Tue, 23 Mar 2021 09:17:07 +0000 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (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 0F1ED61990; Tue, 23 Mar 2021 09:17:02 +0000 (UTC) Received: from disco-boy.misterjones.org ([51.254.78.96] helo=www.loen.fr) by disco-boy.misterjones.org with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94) (envelope-from ) id 1lOd9n-003GRa-JN; Tue, 23 Mar 2021 09:17:00 +0000 MIME-Version: 1.0 Date: Tue, 23 Mar 2021 09:16:59 +0000 From: Marc Zyngier To: Suzuki K Poulose Cc: linux-kernel@vger.kernel.org, mathieu.poirier@linaro.org, mike.leach@linaro.org, anshuman.khandual@arm.com, leo.yan@linaro.org, Will Deacon , Mark Rutland , Catalin Marinas , linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v4 05/19] kvm: arm64: Disable guest access to trace filter controls In-Reply-To: References: <20210225193543.2920532-1-suzuki.poulose@arm.com> <20210225193543.2920532-6-suzuki.poulose@arm.com> User-Agent: Roundcube Webmail/1.4.11 Message-ID: <8cb6eced29d9749d88af6f6d2f649019@kernel.org> X-Sender: maz@kernel.org X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: suzuki.poulose@arm.com, linux-kernel@vger.kernel.org, mathieu.poirier@linaro.org, mike.leach@linaro.org, anshuman.khandual@arm.com, leo.yan@linaro.org, will@kernel.org, mark.rutland@arm.com, catalin.marinas@arm.com, linux-arm-kernel@lists.infradead.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210323_091705_402280_FC9C63DA X-CRM114-Status: GOOD ( 14.36 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Suzuki, On 2021-03-22 22:24, Suzuki K Poulose wrote: > Hi Marc, > > On 25/02/2021 19:35, Suzuki K Poulose wrote: >> Disable guest access to the Trace Filter control registers. >> We do not advertise the Trace filter feature to the guest >> (ID_AA64DFR0_EL1: TRACE_FILT is cleared) already, but the guest >> can still access the TRFCR_EL1 unless we trap it. >> >> This will also make sure that the guest cannot fiddle with >> the filtering controls set by a nvhe host. >> >> Cc: Marc Zyngier >> Cc: Will Deacon >> Cc: Mark Rutland >> Cc: Catalin Marinas >> Signed-off-by: Suzuki K Poulose > > We have already have the v8.4 self hosted tracing support in 5.12-rcX. > Do you think you can pick this up for this 5.12 ? Sure, no problem. Shall I pick patch #3 at the same time? Thanks, M. -- Jazz is not dead. It just smells funny... _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel