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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4DC0BC4332F for ; Wed, 21 Dec 2022 13:34:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232123AbiLUNex (ORCPT ); Wed, 21 Dec 2022 08:34:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41236 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232209AbiLUNeq (ORCPT ); Wed, 21 Dec 2022 08:34:46 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 248FA19035 for ; Wed, 21 Dec 2022 05:34:46 -0800 (PST) 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 AD2B6617CB for ; Wed, 21 Dec 2022 13:34:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5FF18C433F0; Wed, 21 Dec 2022 13:34:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1671629685; bh=WqWR0d44+oC0M51OxsJIk5oYzW5Ewe38o6BJGMCz944=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=QSN6k2D3YaVWrsm0u1NnBATOWav1SPvpxVC5Qc3+KeNG4kFYC5BhBlpRUkUuffEHo V7tOKTKpWTi8p82CMsN7tiDvBA34Uc1gR7mMrdwD315dPO5RUP3u85SpQ0++9C9XaO 2jBoCAhOVg/6bnz+J+IrkfN6pKwcqMCBkxJnLjIa+S//8J7fIjJSNTFLO9YbpkprCy hSHebH+WnK21ogAZxqRvkBPiFJRQGgodD3QxNpdDb7As0CjBWyOB/YTyDeIjg7Ahq6 Xv60z9ryBv4gfT4g7hDGD/dYkBebh4LupvK57Dh5AYlcZNaLCVPy71ZI8vvhrX82oa KcjdrPs5K23xg== Date: Wed, 21 Dec 2022 13:34:38 +0000 From: Mark Brown To: Marc Zyngier Cc: Dong Bo , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvmarm@lists.cs.columbia.edu, Nianyao Tang , James Morse , Alexandru Elisei , Suzuki K Poulose , Oliver Upton , Catalin Marinas , Will Deacon Subject: Re: [PATCH] KVM: arm64: Synchronize SMEN on vcpu schedule out Message-ID: References: <20221220105024.13484-1-dongbo4@huawei.com> <86v8m6bcuh.wl-maz@kernel.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="X1wLM/v5tW57IqQt" Content-Disposition: inline In-Reply-To: <86v8m6bcuh.wl-maz@kernel.org> X-Cookie: Programming is an unnatural act. Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --X1wLM/v5tW57IqQt Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Dec 20, 2022 at 10:15:18AM +0000, Marc Zyngier wrote: > Dong Bo wrote: > > If we have VHE and need to reenable SME for host in > > kvm_arch_vcpu_put_fp, CPACR.SMEN is modified from 0 to 1. Trap > > control for reading SVCR is modified from enable to disable. > > Synchronization is needed before reading SVCR later in > > fpsimd_save, or it may cause sync exception which can not be > > handled by host. Reviewed-by: Mark Brown --X1wLM/v5tW57IqQt Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmOjC24ACgkQJNaLcl1U h9BfMgf/Q43z96bvYnITDmaGHJxEC1F3oW2EdvKLoge3nzDZJTbsZX1jqW5k6Hes vfx8GK+A0zVG6XqyT6MpRm6WIldfEpQwTtvdTDFs1DiY2GEpfQozQKllrquASy9W W3B1UCB90Dv4c519bT3WRCInlUpHRJijyj/m4cijPK4bhLWqVlJXEPJCZ9kZtd3+ zaoOdLKZliZ4qYYe1KydiQO+tBNtSwflYRRfD0taUdpYPjDURuIcGubtuwdOkAqa 4enKZHb2JCUxTuBqOw9ocMglWfRjG+RtRmTdqHap1s0dmP0ywB7v79TBty2HYd7A JcOErjeidYrL4XN6aYR91H1EtqhvKg== =+pAK -----END PGP SIGNATURE----- --X1wLM/v5tW57IqQt--