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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 40FBDC433EF for ; Tue, 26 Oct 2021 10:34:50 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 15E4660E75 for ; Tue, 26 Oct 2021 10:34:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 15E4660E75 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: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-Transfer-Encoding:Content-ID:Content-Description:Resent-Date :Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=+XjvDxXrQpOVZ0DlktZXxBSLJ+jNSv2L51YQMiGYlVw=; b=UZ9PW0Gzqz7DfD45FGztvzkO1r XEFszmKKneSASVz9MWzAoerH+bZtgTr/cR1CCUDunTuaqLgn0tPrYftM1Eb3buYZFscLK8sEnf29A GyRMZjIp5Uo/rJC9SexxqHCK9JPduyU7QzAFeoP7NDzgLGmTGSS88f+nq/mkMizC123MptF8LPayJ yKTKf/6lTLV86TOw9cSNS0IvjMV3AmQlhkJAej35gH4AN/2Oa5jFUCBF75vI5EvmhhpWaUZwF38+X P2CcAINkeXiimO1/9fLgscTIaXmYYeEUJItcsg+6efXFOT3nLp6b5uVmKdXUQI7Qf62ElKu0wlfN4 aB4Yh/RA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mfJm1-001Uo0-JQ; Tue, 26 Oct 2021 10:33:41 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mfJly-001UnV-3c for linux-arm-kernel@lists.infradead.org; Tue, 26 Oct 2021 10:33:39 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8EFF260E09; Tue, 26 Oct 2021 10:33:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1635244417; bh=/i0IH1A83mygSWLlDF6lfdLJ462O46c7p346EbPb+zs=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=hcPZQVoVfc5pVh4XE6ky7phHhVZGi3bjivVMjd7Jx/sgb3BNTgzguJwJ8W6Nen6O9 x8Fm/RuT+ZyvcOspIVTQF6boP8FNTBBASJGRXQ7c66v8RhNKjT/wBxlJVkXHJHMFQV 5v/Ql0EggoRdiV4QpO7NF33niNPiQxhdDCoWkPIxjW1y7mmLM7w930oULKYyLgKiZW Y2Wgi+7TBpS8GrzX+LPU6oa+YK+I8bh+iAQA0ddk1SZZrYsfYKv0DqQFhYA+Uw9xec /WoEcmyHkfS4IWqBKm5lG8Pom4Z4YVy9kNh3JRaoMxUKs9TsWXZ8ThaDqXPpkmU5D6 OLNXZTjVYVm3A== Date: Tue, 26 Oct 2021 11:33:33 +0100 From: Mark Brown To: Will Deacon Cc: Catalin Marinas , linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH] arm64: Document boot requirements for FEAT_SME_FA64 Message-ID: References: <20211025124822.3496090-1-broonie@kernel.org> <20211026092925.GB21289@willie-the-truck> MIME-Version: 1.0 In-Reply-To: <20211026092925.GB21289@willie-the-truck> X-Cookie: Times approximate. X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211026_033338_194318_B5F718CA X-CRM114-Status: GOOD ( 12.69 ) 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: multipart/mixed; boundary="===============2822971897728652267==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============2822971897728652267== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="VrdA7QZ3fDlMVoWB" Content-Disposition: inline --VrdA7QZ3fDlMVoWB Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Oct 26, 2021 at 10:29:25AM +0100, Will Deacon wrote: > On Mon, Oct 25, 2021 at 01:48:22PM +0100, Mark Brown wrote: > > + - If the kernel is entered at EL1 and EL2 is present: > > + > > + - SMCR_EL2.FA64 (bit 31) must be initialised to to 0b1. > With the second bullet, does that mean KVM is in violation of our own > documentation? No worse than it was before - we already document the requirements for baseline SME which we don't ourselves satisfy, no guest will be able to get as far as noticing that FA64 isn't enabled since all SME operations will trap. --VrdA7QZ3fDlMVoWB Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmF32X0ACgkQJNaLcl1U h9DnUwgAg6u3S1W2re9fP5IzhJS3bDILFZESrKTltbocMt+UmEx+BELRfONBADKu 6dbexJ3F4rvmp23VsFgGRSwd11IeZdKuY9WcZdmFyLi08mRpNvZNOJ/n6/JbbGHO rYgNmdszQj2Hu1JmM6ZNTLWNG2xr2LEFPp+jxR+7Axm3BOfQhGtcqwgHOtZQPg2a THuhjABf86kUYbifpi/0CgBvc67u8HiCDmyF/kYoeZrCLRq6NTK+mx2Q7BEDC8NH K5kToeybUqqy+Dap+W+Ly3YlyzHAPksamHj/0NKWZHs+KLKZ9pEay8RhAk5rZa/n 0C5TIn6J3lLoNtl1ti+y7Bqyzgm+mg== =sfCx -----END PGP SIGNATURE----- --VrdA7QZ3fDlMVoWB-- --===============2822971897728652267== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============2822971897728652267==--