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 AC629C433E1 for ; Tue, 25 Aug 2020 09:40:34 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 660902075B for ; Tue, 25 Aug 2020 09:40:34 +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="b7Tvx0Rh" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 660902075B 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 20A734BE5E; Tue, 25 Aug 2020 05:40:34 -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 bRtHmCvSU4rm; Tue, 25 Aug 2020 05:40:33 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 3B3264C084; Tue, 25 Aug 2020 05:40:33 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 3620E4BF4C for ; Tue, 25 Aug 2020 05:40:31 -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 EE0wT0BI4t5Z for ; Tue, 25 Aug 2020 05:40:30 -0400 (EDT) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 3DAB44C0CF for ; Tue, 25 Aug 2020 05:40:29 -0400 (EDT) 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 Cc: kernel-team@android.com, Marc Zyngier , Catalin Marinas , Will Deacon , linux-arm-kernel@lists.infradead.org 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 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 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm