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=-14.0 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=unavailable 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 B5168C433DF for ; Tue, 25 Aug 2020 09:44:29 +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 7736720706 for ; Tue, 25 Aug 2020 09:44:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="vrMiiK+u"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="b7Tvx0Rh" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7736720706 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=BvtyNUYxayALc+6wEib1IZ/NCINRN3qYNrsg7On6Ea8=; b=vrMiiK+uRnZo+kUVRxhgcxQrx tugxJ9gxUTRMvpzSyFbsM9Zp5idEo7B06fxvFgCqbqeRfceOqCVlVK0DXsxqnnDIkM1K0Nfa4MOYP QEui2tDJIF3woknM0dHeUbP/N8IMPcMaKzLnsiMvI/oWWPVBUtuDx4B3g4bXkvN+lq9A4PPEltw5e 4ENr4YpmbQNst+UHrfK1g7zOrhAm8d0ox92n3odytukOnOO8tQTgDi8nSjv2ruwKKbEkQpUCjmrGQ pgVXck/tqzIaTWMSZ2YrdopVr2Jz/tHM3BdKK1bB3pFpHpnHxZ0/I2mKEfwhWNsGahn3+E0pjREpO nxBcRcMnA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kAVTR-0001oE-Ho; Tue, 25 Aug 2020 09:42:37 +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 1kAVRN-0000uV-4j for linux-arm-kernel@lists.infradead.org; Tue, 25 Aug 2020 09:40:30 +0000 Received: from localhost.localdomain (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D37472075F; Tue, 25 Aug 2020 09:40:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598348428; bh=qicY6SH0wUjjb2+vWPK4w50pPX0JNvzQpMiiW5Cg+6A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b7Tvx0RhnOcrcrAKOdT3eAmO2ik/nctmxu34B0MjiII8FjC5UDm4rTz+SxbDXoMx/ miOZ6I7wyo9SdCkpOJOX2LwiHHFqEdJ1+drixvAQ4zPP+qfANM7UQ7T9m8cDgN8BOM A/gGrpNpFQZUO7w/3T/A7KiibZiFbWAhNiKjNvWE= From: Will Deacon To: kvmarm@lists.cs.columbia.edu Subject: [PATCH v3 12/21] KVM: arm64: Add support for stage-2 write-protect in generic page-table Date: Tue, 25 Aug 2020 10:39:44 +0100 Message-Id: <20200825093953.26493-13-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200825093953.26493-1-will@kernel.org> References: <20200825093953.26493-1-will@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200825_054029_323555_7C003DF9 X-CRM114-Status: GOOD ( 14.03 ) 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: kernel-team@android.com, Gavin Shan , Suzuki Poulose , Marc Zyngier , Quentin Perret , James Morse , Catalin Marinas , Will Deacon , linux-arm-kernel@lists.infradead.org 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 From: Quentin Perret Add a stage-2 wrprotect() operation to the generic page-table code. Cc: Marc Zyngier Signed-off-by: Quentin Perret Signed-off-by: Will Deacon --- arch/arm64/include/asm/kvm_pgtable.h | 15 +++++++++++++++ arch/arm64/kvm/hyp/pgtable.c | 6 ++++++ 2 files changed, 21 insertions(+) diff --git a/arch/arm64/include/asm/kvm_pgtable.h b/arch/arm64/include/asm/kvm_pgtable.h index ae56534f87a0..0c96b78d791d 100644 --- a/arch/arm64/include/asm/kvm_pgtable.h +++ b/arch/arm64/include/asm/kvm_pgtable.h @@ -173,6 +173,21 @@ int kvm_pgtable_stage2_map(struct kvm_pgtable *pgt, u64 addr, u64 size, */ int kvm_pgtable_stage2_unmap(struct kvm_pgtable *pgt, u64 addr, u64 size); +/** + * kvm_pgtable_stage2_wrprotect() - Write-protect guest stage-2 address range + * without TLB invalidation. + * @pgt: Page-table structure initialised by kvm_pgtable_stage2_init(). + * @addr: Intermediate physical address from which to write-protect, + * @size: Size of the range. + * + * Note that it is the caller's responsibility to invalidate the TLB after + * calling this function to ensure that the updated permissions are visible + * to the CPUs. + * + * Return: 0 on success, negative error code on failure. + */ +int kvm_pgtable_stage2_wrprotect(struct kvm_pgtable *pgt, u64 addr, u64 size); + /** * kvm_pgtable_stage2_mkyoung() - Set the access flag in a page-table entry. * @pgt: Page-table structure initialised by kvm_pgtable_stage2_init(). diff --git a/arch/arm64/kvm/hyp/pgtable.c b/arch/arm64/kvm/hyp/pgtable.c index 30713eb773e0..c218651f8eba 100644 --- a/arch/arm64/kvm/hyp/pgtable.c +++ b/arch/arm64/kvm/hyp/pgtable.c @@ -726,6 +726,12 @@ static int stage2_update_leaf_attrs(struct kvm_pgtable *pgt, u64 addr, return 0; } +int kvm_pgtable_stage2_wrprotect(struct kvm_pgtable *pgt, u64 addr, u64 size) +{ + return stage2_update_leaf_attrs(pgt, addr, size, 0, + KVM_PTE_LEAF_ATTR_LO_S2_S2AP_W, NULL); +} + kvm_pte_t kvm_pgtable_stage2_mkyoung(struct kvm_pgtable *pgt, u64 addr) { kvm_pte_t pte = 0; -- 2.28.0.297.g1956fa8f8d-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel