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=-12.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 6A410C2D0E1 for ; Tue, 15 Sep 2020 10:42:48 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id D001221D7D for ; Tue, 15 Sep 2020 10:42:47 +0000 (UTC) Authentication-Results: mail.kernel.org; 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 D001221D7D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 5BA8D4B328; Tue, 15 Sep 2020 06:42:47 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@kernel.org Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id KFa71y3XVPSa; Tue, 15 Sep 2020 06:42:46 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 3F0744B332; Tue, 15 Sep 2020 06:42:45 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 478F24B302 for ; Tue, 15 Sep 2020 06:42:44 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id qoBPJ3twEVgp for ; Tue, 15 Sep 2020 06:42:43 -0400 (EDT) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 5CB1F4B315 for ; Tue, 15 Sep 2020 06:42:43 -0400 (EDT) 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 Cc: Will Deacon , kernel-team@android.com X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu 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 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm 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 ; 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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 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=-16.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 9A670C2D0E0 for ; Tue, 15 Sep 2020 10:44:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5A9BB20735 for ; Tue, 15 Sep 2020 10:44:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600166680; bh=JpQAb6Gm2FYtY9xG2whFGPDFubcLeWuG9gg0NSevaxs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=2bxKzYFXTMUQ4q0YfbX5rIOvaAbDX4qp1Q9ObXSBspFp4IB/cuFhduQqYVSqAR1MO 5xOugi4vtqREJdfOd8VTu1IuM7NSf+RnI9+2Y6mKQ0TvhTV+x5Kj4RQq8hG8MG8FrG pDSfzROdKZNC2pde3idaPKBp8NAO6QkoPjAREAMc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726440AbgIOKo3 (ORCPT ); Tue, 15 Sep 2020 06:44:29 -0400 Received: from mail.kernel.org ([198.145.29.99]:46174 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726381AbgIOKmn (ORCPT ); Tue, 15 Sep 2020 06:42:43 -0400 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 Cc: kernel-team@android.com, Will Deacon 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 Content-Transfer-Encoding: 8bit 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 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.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