From patchwork Mon Aug 13 14:57:22 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 10564357 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7ED3017E1 for ; Mon, 13 Aug 2018 14:59:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6DA3B29425 for ; Mon, 13 Aug 2018 14:59:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 622052942A; Mon, 13 Aug 2018 14:59:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 1337629432 for ; Mon, 13 Aug 2018 14:59:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=G4nbTrnYlnk8narwthwj3ul/dMACQYKW3c7AS/zPxJQ=; b=VsiqHxZoQ4wDI7+C3SoPNwLmxm uzFOMvz+sT5TIKMRlGEruX3wK2xOeg/4sxCn4eU1DTLkzAsF7t8vXt5kTLjzbQNqOnN3fZwiHqiKH j2/kB3N5pFHWGJVffmGsztCLGjaCbDymzLucOf5rfBH0DITvxt4l/kIPQgG6+c6zx3MDszUjSaEUc m5bwBy2wFs94zVbmBPsGIu+Ji8rRCZLmF4b4W6MQtH1dZEoc3lsM+BJle8EZC4aIstkOgEhdw28+u XJnZ4TS2CCjlZX7TK+9H/5Y8G8IRCAdGpUI5A9M/AoDS3y9hWhbdTS4tehgrlHO4c6NkN9v6ge6Qw Rba+vZHQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fpEJu-0006Ho-OL; Mon, 13 Aug 2018 14:59:46 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fpEJM-0005P8-Lj for linux-arm-kernel@lists.infradead.org; Mon, 13 Aug 2018 14:59:17 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 89D9B15BE; Mon, 13 Aug 2018 07:59:02 -0700 (PDT) Received: from approximate.Emea.Arm.com (approximate.Emea.Arm.com [10.4.13.119]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 973563F5D0; Mon, 13 Aug 2018 07:58:59 -0700 (PDT) From: Marc Zyngier To: Paolo Bonzini , =?utf-8?b?UmFkaW0gS3LEjW3DocWZ?= Subject: [PATCH 04/37] KVM: arm/arm64: Consolidate page-table accessors Date: Mon, 13 Aug 2018 15:57:22 +0100 Message-Id: <20180813145755.16566-5-marc.zyngier@arm.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180813145755.16566-1-marc.zyngier@arm.com> References: <20180813145755.16566-1-marc.zyngier@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180813_075913_458961_892078F1 X-CRM114-Status: GOOD ( 10.86 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Andrew Jones , Kees Cook , kvm@vger.kernel.org, "Gustavo A . R . Silva" , Andre Przywara , Punit Agrawal , Christoffer Dall , Dongjiu Geng , Jia He , Eric Auger , James Morse , Catalin Marinas , Suzuki Poulose , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The arm and arm64 KVM page tables accessors are pointlessly different between the two architectures, and likely both wrong one way or another: arm64 lacks a dsb(), and arm doesn't use WRITE_ONCE. Let's unify them. Acked-by: Mark Rutland Acked-by: Christoffer Dall Signed-off-by: Marc Zyngier --- arch/arm/include/asm/kvm_mmu.h | 12 ------------ arch/arm64/include/asm/kvm_mmu.h | 3 --- virt/kvm/arm/mmu.c | 12 ++++++++++++ 3 files changed, 12 insertions(+), 15 deletions(-) diff --git a/arch/arm/include/asm/kvm_mmu.h b/arch/arm/include/asm/kvm_mmu.h index 8553d68b7c8a..b2feaea1434c 100644 --- a/arch/arm/include/asm/kvm_mmu.h +++ b/arch/arm/include/asm/kvm_mmu.h @@ -75,18 +75,6 @@ phys_addr_t kvm_get_idmap_vector(void); int kvm_mmu_init(void); void kvm_clear_hyp_idmap(void); -static inline void kvm_set_pmd(pmd_t *pmd, pmd_t new_pmd) -{ - *pmd = new_pmd; - dsb(ishst); -} - -static inline void kvm_set_pte(pte_t *pte, pte_t new_pte) -{ - *pte = new_pte; - dsb(ishst); -} - static inline pte_t kvm_s2pte_mkwrite(pte_t pte) { pte_val(pte) |= L_PTE_S2_RDWR; diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h index bac9f016736b..ea000fb47ec0 100644 --- a/arch/arm64/include/asm/kvm_mmu.h +++ b/arch/arm64/include/asm/kvm_mmu.h @@ -169,9 +169,6 @@ phys_addr_t kvm_get_idmap_vector(void); int kvm_mmu_init(void); void kvm_clear_hyp_idmap(void); -#define kvm_set_pte(ptep, pte) set_pte(ptep, pte) -#define kvm_set_pmd(pmdp, pmd) set_pmd(pmdp, pmd) - static inline pte_t kvm_s2pte_mkwrite(pte_t pte) { pte_val(pte) |= PTE_S2_RDWR; diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c index ea7314296ad1..a6bdbed1903a 100644 --- a/virt/kvm/arm/mmu.c +++ b/virt/kvm/arm/mmu.c @@ -177,6 +177,18 @@ static void clear_stage2_pmd_entry(struct kvm *kvm, pmd_t *pmd, phys_addr_t addr put_page(virt_to_page(pmd)); } +static inline void kvm_set_pte(pte_t *ptep, pte_t new_pte) +{ + WRITE_ONCE(*ptep, new_pte); + dsb(ishst); +} + +static inline void kvm_set_pmd(pmd_t *pmdp, pmd_t new_pmd) +{ + WRITE_ONCE(*pmdp, new_pmd); + dsb(ishst); +} + /* * Unmapping vs dcache management: *