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=-17.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 5BF4CC4332B for ; Fri, 5 Mar 2021 19:03:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 241B9650AF for ; Fri, 5 Mar 2021 19:03:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229697AbhCETCf (ORCPT ); Fri, 5 Mar 2021 14:02:35 -0500 Received: from mail.kernel.org ([198.145.29.99]:32768 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229631AbhCETCM (ORCPT ); Fri, 5 Mar 2021 14:02:12 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 43CA96509A; Fri, 5 Mar 2021 19:02:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1614970932; bh=+HY4tyg5MEsNmrtevimpEfoDy4PsjuAzV42+G/FLMVQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=c0cXkUhfqGyQIPH14jJKrVOWqS+nkTdjAw7+FncqA/3JiGVSK+/buLmQR5CPX0Lkh dCW7dcorA8Yx48N9S2h9g8R6GdPZXZYvGcN7K0Y5c7YEU2XCqb+THvNf39KKmGJPvg 7SlguW8KOncXG2JrcnBGVpunFHsss2GoyrMFKsQFZP5J3xQ2z4EDXBStFAxnJPxUzg aey5TwsRQzPpuo0eVRH2m/iUb2g8ydUomIz9TElX1hpK5ZM3qVToNjiQU/XknJ3DEC KaxOe0sr57aCvtJqjnsfjIielTW4HTsR6GLfySdzgt5AgvwD20BCAzORpz6fubBLwx lvJZ9Wwx+U9Wg== Date: Fri, 5 Mar 2021 19:02:06 +0000 From: Will Deacon To: Quentin Perret Cc: catalin.marinas@arm.com, maz@kernel.org, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, android-kvm@google.com, linux-kernel@vger.kernel.org, kernel-team@android.com, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, tabba@google.com, mark.rutland@arm.com, dbrazdil@google.com, mate.toth-pal@arm.com, seanjc@google.com, robh+dt@kernel.org Subject: Re: [PATCH v3 31/32] KVM: arm64: Disable PMU support in protected mode Message-ID: <20210305190205.GA23633@willie-the-truck> References: <20210302150002.3685113-1-qperret@google.com> <20210302150002.3685113-32-qperret@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210302150002.3685113-32-qperret@google.com> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 02, 2021 at 03:00:01PM +0000, Quentin Perret wrote: > The host currently writes directly in EL2 per-CPU data sections from > the PMU code when running in nVHE. In preparation for unmapping the EL2 > sections from the host stage 2, disable PMU support in protected mode as > we currently do not have a use-case for it. > > Signed-off-by: Quentin Perret > --- > arch/arm64/kvm/perf.c | 3 ++- > arch/arm64/kvm/pmu.c | 8 ++++---- > 2 files changed, 6 insertions(+), 5 deletions(-) Acked-by: Will Deacon Will