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=-5.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_2 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 DAF1EC2BA83 for ; Sat, 15 Feb 2020 11:56:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A89972073A for ; Sat, 15 Feb 2020 11:56:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581767789; bh=NaAHvFuU+ylYPII07/Q0dVeLaamkxwl2owLhdZmF30s=; h=Date:From:To:Cc:Subject:In-Reply-To:References:List-ID:From; b=wLQYcVxSFcy+lxCkrBYdr4jkbsx2SPAV1CkJcTc2aTzYBaTx2E7hCr6XzILFjiBQ6 rQYvIq1JtxT6OFVUbiyXw+o4UvHPCAeWzhQalllDaDqUfdR9FR29un9mH0OXH4E96K RJUQ7wWWorlxMT15qjM6vU1IbPGwZ5BoX502ETpU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726291AbgBOL43 (ORCPT ); Sat, 15 Feb 2020 06:56:29 -0500 Received: from mail.kernel.org ([198.145.29.99]:42718 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725965AbgBOL42 (ORCPT ); Sat, 15 Feb 2020 06:56:28 -0500 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id F105E2072D; Sat, 15 Feb 2020 11:56:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581767788; bh=NaAHvFuU+ylYPII07/Q0dVeLaamkxwl2owLhdZmF30s=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=c/I4lBS0EkFioir+ydtfPPjtntwsQIPJ7gsuAA3lo46+qwOcC4aMnOKMd0Z3INdXb +XXx9hsOBFemgKcDam3c13z6zdZPka+UYQI4oclDwsHzdHpDY/hsKWrKryaYlalWJW y8S7mdF0AnUzkD5yhE5BODnxSJSI/dNdTVzG8774= Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why) by disco-boy.misterjones.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1j2w3e-005RK7-1L; Sat, 15 Feb 2020 11:56:26 +0000 Date: Sat, 15 Feb 2020 11:56:24 +0000 From: Marc Zyngier To: Mark Brown Cc: Catalin Marinas , Will Deacon , Alexander Viro , Paul Elliott , Peter Zijlstra , Yu-cheng Yu , Amit Kachhap , Vincenzo Frascino , Eugene Syromiatnikov , Szabolcs Nagy , "H . J . Lu " , Andrew Jones , Kees Cook , Arnd Bergmann , Jann Horn , Richard Henderson , Kristina =?UTF-8?Q?Mart=C5=A1enko?= , Thomas Gleixner , Florian Weimer , Sudakshina Das , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, Dave Martin Subject: Re: [PATCH v6 10/11] KVM: arm64: BTI: Reset BTYPE when skipping emulated instructions Message-ID: <20200215115624.2afbf55c@why> In-Reply-To: <20200212192906.53366-11-broonie@kernel.org> References: <20200212192906.53366-1-broonie@kernel.org> <20200212192906.53366-11-broonie@kernel.org> Organization: Approximate X-Mailer: Claws Mail 3.17.4 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: broonie@kernel.org, catalin.marinas@arm.com, will@kernel.org, viro@zeniv.linux.org.uk, paul.elliott@arm.com, peterz@infradead.org, yu-cheng.yu@intel.com, amit.kachhap@arm.com, vincenzo.frascino@arm.com, esyr@redhat.com, szabolcs.nagy@arm.com, hjl.tools@gmail.com, drjones@redhat.com, keescook@chromium.org, arnd@arndb.de, jannh@google.com, richard.henderson@linaro.org, kristina.martsenko@arm.com, tglx@linutronix.de, fweimer@redhat.com, sudi.das@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, Dave.Martin@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 12 Feb 2020 19:29:05 +0000 Mark Brown wrote: > From: Dave Martin > > Since normal execution of any non-branch instruction resets the > PSTATE BTYPE field to 0, so do the same thing when emulating a > trapped instruction. > > Branches don't trap directly, so we should never need to assign a > non-zero value to BTYPE here. > > Signed-off-by: Dave Martin > Signed-off-by: Mark Brown Acked-by: Marc Zyngier M. -- Jazz is not dead. It just smells funny...