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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B8430E77178 for ; Thu, 5 Dec 2024 17:19:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=tuMoj6FBrwthfD/QXRKn0T8MpcQJVZC+PuFcPiXv5lw=; b=TyhnLqPTGYOgg9PplrjahAbHyI LkFO7kPKm7jWtte1BAVEfm87STMnaqlQ5uYa7nFmiEJlUSIMvlTM3bqUV+RHDPF3z9n591WdxJxeH oAGMrT2hhMaUwMDrTsNqOuqOhmafnpYYYqqlPF6/3EuKfDvRD194C34DS2EpSxuVCgbWgSurVvjB0 wFCvFcS7/+QWHSJBa6fbIB7dSFO7RQIWej7X0aPazu5F92heWVtqT7a48mnE+HU3us7UkyDjqMo+Y x4cXhbNW1/GEmTygzZMvEoJT848n56RBDlMh5QK/C02u151JtF6dHgZqGWT2rJvlroi26E683XdtW nSaXEcaQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tJFV8-0000000Gv1x-2YYC; Thu, 05 Dec 2024 17:18:54 +0000 Received: from out-187.mta1.migadu.com ([2001:41d0:203:375::bb]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tJFKj-0000000Gsec-1Hv7 for linux-arm-kernel@lists.infradead.org; Thu, 05 Dec 2024 17:08:10 +0000 Date: Thu, 5 Dec 2024 09:07:57 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1733418486; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=tuMoj6FBrwthfD/QXRKn0T8MpcQJVZC+PuFcPiXv5lw=; b=adWPkEPi2AC+ur++cKuiZ1fjoy0tQUoKvZM6OprL6MZ0iM2PyikJZTy/F2dkkAXLU1STaq PJw1ITPcXqab8mPBYjn+JKlnE8SOzi2nu0FMgrqZfnHwOvDW/STL0hrmp77WVQzU7GytO9 AfPV3XNLHObDPRwnZpFLGyipmGr+D2o= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Oliver Upton To: Marc Zyngier Cc: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, Joey Gouly , Suzuki K Poulose , Zenghui Yu , Bjorn Andersson , Christoffer Dall Subject: Re: [PATCH 06/11] KVM: arm64: nv: Acceletate EL0 counter accesses from hypervisor context Message-ID: References: <20241202172134.384923-1-maz@kernel.org> <20241202172134.384923-7-maz@kernel.org> <86ikrytmr6.wl-maz@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <86ikrytmr6.wl-maz@kernel.org> X-Migadu-Flow: FLOW_OUT X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241205_090809_488710_46C625A1 X-CRM114-Status: GOOD ( 11.72 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Dec 05, 2024 at 11:03:41AM +0000, Marc Zyngier wrote: > On Thu, 05 Dec 2024 00:37:34 +0000, > Oliver Upton wrote: > > > > typo: accelerate > > Huh, thanks! > > > > > On Mon, Dec 02, 2024 at 05:21:29PM +0000, Marc Zyngier wrote: > > [...] > > > > + case SYS_CNTVCT_EL0: > > > + case SYS_CNTVCTSS_EL0: > > > + /* If !ELIsInHost(EL2), the guest's CNTVOFF_EL2 applies */ > > > > !ELIsInHost(EL0) > > No, and that's the whole point. CNTVOFF_EL2 applies at all times when > HCR_EL2==0 and that we're at EL2. From the pseudocode for CNTVCT_EL0: Dammit, I don't know how many times I misread "CNTPCT" here rather than CNTVCT. Sorry for the noise. -- Thanks, Oliver