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=-16.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 C774FC43461 for ; Tue, 15 Sep 2020 10:46:56 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 7210521D1B for ; Tue, 15 Sep 2020 10:46:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="WDJBcSAd"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="1WPqzQ4a" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7210521D1B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=0IZtmQGf0jknkOgTjKEU5vRjXv/qVmw9knKL3wljCfo=; b=WDJBcSAdJjWyNoE0IFKSnB6TI D/yQ42K7WnUnhuHNNPsjd72hpVcLmgtwQYybQ0xr0F4AucI1tRqohxz2uavLrtyCgPCB7Ss7mdcX+ OlOkNxH/TEVX15TVpP+5BXDve4qC5mr3t28ZnnuyUvA5r0RdtZZYE0ikRgsVVrq0Xs5nTAsIaic76 sbU3lsDkv1mImK3+H+YBUtApxWogr04PPbg8konCdTyIm2GU48CR7WgvNBROHEuccpAF6YJgohnJA K31x2qorMaIzFyae1MzUbkEIWUwaPj28bCoPpMC2u2lG8fr24MOYKQTBbHKQkULU6JFoxW+bA7GUA 0PU7HfOhw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kI8S2-00086G-LR; Tue, 15 Sep 2020 10:44:42 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kI8Q7-0007Od-8C for linux-arm-kernel@lists.infradead.org; Tue, 15 Sep 2020 10:42:49 +0000 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 7E3E720B1F; Tue, 15 Sep 2020 10:42:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600166562; bh=JpQAb6Gm2FYtY9xG2whFGPDFubcLeWuG9gg0NSevaxs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1WPqzQ4aQD2giZcrdNRC1eigtTWsqyH1+i6u597CO2//h+JBFboBpvKspQgu9+0za Vtk+uuOV4hXwuCWzwCX/t94/NOLZyd1kJE+wqRBfzav0Rl0WnTHx8ywA8SS02OX09C cqFYuVySais/VOfEomR/Mc3h6wauq8p2AHG1+E7o= Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kI8Q4-00ByDU-97; Tue, 15 Sep 2020 11:42:41 +0100 From: Marc Zyngier To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 2/2] KVM: arm64: Remove S1PTW check from kvm_vcpu_dabt_iswrite() Date: Tue, 15 Sep 2020 11:42:18 +0100 Message-Id: <20200915104218.1284701-3-maz@kernel.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200915104218.1284701-1-maz@kernel.org> References: <20200915104218.1284701-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, kernel-team@android.com, will@kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200915_064243_501769_38209248 X-CRM114-Status: GOOD ( 15.83 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Will Deacon , kernel-team@android.com 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 Now that kvm_vcpu_trap_is_write_fault() checks for S1PTW, there is no need for kvm_vcpu_dabt_iswrite() to do the same thing, as we already check for this condition on all existing paths. Drop the check and add a comment instead. Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_emulate.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h index 4f618af660ba..1cc5f5f72d0b 100644 --- a/arch/arm64/include/asm/kvm_emulate.h +++ b/arch/arm64/include/asm/kvm_emulate.h @@ -303,10 +303,10 @@ static __always_inline bool kvm_vcpu_abt_iss1tw(const struct kvm_vcpu *vcpu) return !!(kvm_vcpu_get_esr(vcpu) & ESR_ELx_S1PTW); } +/* Always check for S1PTW *before* using this. */ static __always_inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu) { - return !!(kvm_vcpu_get_esr(vcpu) & ESR_ELx_WNR) || - kvm_vcpu_abt_iss1tw(vcpu); /* AF/DBM update */ + return kvm_vcpu_get_esr(vcpu) & ESR_ELx_WNR; } static inline bool kvm_vcpu_dabt_is_cm(const struct kvm_vcpu *vcpu) -- 2.28.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel