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 14BE6C433F5 for ; Wed, 23 Feb 2022 15:35:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=uZxzzYEvF5gzazevpZ8hfNpJE+TgD81xg9SIS9DaMiM=; b=uPP3ZxmNTP6psl N27qVIfWLTOtLjMcVsaBgoVuf8Hj0+VRYmGxRY9VC7JWvzdLDjDzHy5/qe5HkqaWgbyPT4IlhAfsp QwBjIihWQr3l9NIM1HuB/4chqq0D00UQZDUUX448ZR4rXoPf932MLrsp1IBCQpfSf1GITjDMzFw3l COVsio5YeTS9ylX80tlgSvniLAxarO9B3Yx9KSNKlZAugdglpGjINTKw+CRByccTJ5uEH5fiUbH4g gSVBSBMsf9jC8P5Yd+igZqCbjzMriM1yjNsE+EtzgXw5BpMlJAs8Sgb+rttZbSBtAKKlkEX9brpVF cudAqJn7KQg5Tn+g+L8Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nMtf7-00F3KX-Uo; Wed, 23 Feb 2022 15:34:42 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nMtf4-00F3JH-9R for linux-arm-kernel@lists.infradead.org; Wed, 23 Feb 2022 15:34:39 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id C8EB361828; Wed, 23 Feb 2022 15:34:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 680A6C340E7; Wed, 23 Feb 2022 15:34:34 +0000 (UTC) Date: Wed, 23 Feb 2022 15:34:31 +0000 From: Catalin Marinas To: Mark Brown Cc: Will Deacon , Marc Zyngier , Shuah Khan , Shuah Khan , Alan Hayward , Luis Machado , Salil Akerkar , Basant Kumar Dwivedi , Szabolcs Nagy , James Morse , Alexandru Elisei , Suzuki K Poulose , linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, kvmarm@lists.cs.columbia.edu Subject: Re: [PATCH v11 27/40] KVM: arm64: Trap SME usage in guest Message-ID: References: <20220207152109.197566-1-broonie@kernel.org> <20220207152109.197566-28-broonie@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220207152109.197566-28-broonie@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220223_073438_389652_68F64254 X-CRM114-Status: GOOD ( 11.94 ) 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-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Feb 07, 2022 at 03:20:56PM +0000, Mark Brown wrote: > SME defines two new traps which need to be enabled for guests to ensure > that they can't use SME, one for the main SME operations which mirrors the > traps for SVE and another for access to TPIDR2 in SCTLR_EL2. > > For VHE manage SMEN along with ZEN in activate_traps() and the FP state > management callbacks, along with SCTLR_EL2.EnTPIDR2. There is no > existing dynamic management of SCTLR_EL2. > > For nVHE manage TSM in activate_traps() along with the fine grained > traps for TPIDR2 and SMPRI. There is no existing dynamic management of > fine grained traps. > > Signed-off-by: Mark Brown This looks alright to me but I'm not a kvm expert. FWIW: Reviewed-by: Catalin Marinas _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel