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 ABFB3C433DF for ; Thu, 30 Jul 2020 15:34:48 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 5FEDD22B3F for ; Thu, 30 Jul 2020 15:34:48 +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="hLjLeoyD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5FEDD22B3F 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 196D54B4EA; Thu, 30 Jul 2020 11:34:48 -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 tCHL+cw2mFgU; Thu, 30 Jul 2020 11:34:47 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 0471A4B4F1; Thu, 30 Jul 2020 11:34:47 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id DD6DD4B48C for ; Thu, 30 Jul 2020 11:34:45 -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 BqR+bseriPNm for ; Thu, 30 Jul 2020 11:34:45 -0400 (EDT) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 9C2024B439 for ; Thu, 30 Jul 2020 11:34:44 -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 52B0D22B3F; Thu, 30 Jul 2020 15:34:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596123283; bh=x4eJ/icjnPtK/YErozxgKpmW+WE3OYQVubykC8F+vu4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hLjLeoyDvS1rnie7yZLEZwbCfAt+Af4TIeZjt1U9KPmaFRWQpz9EHRBUF/E8yOST9 kj92WYhWtPeUx3TIlmzjOj7ILW+6fCcM0lhRY7yGYmfEl7QqWQ1iSeek6VlEh41z1X V5TrRiSkm4jhIedIF0p6vIFs5t6foVPIMt0zHzWo= From: Will Deacon To: kvmarm@lists.cs.columbia.edu Subject: [PATCH 12/20] KVM: arm64: Convert write-protect operation to generic page-table API Date: Thu, 30 Jul 2020 16:33:58 +0100 Message-Id: <20200730153406.25136-13-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200730153406.25136-1-will@kernel.org> References: <20200730153406.25136-1-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 Convert stage2_wp_range() to call the kvm_pgtable_stage2_wrprotect() function of the generic page-table code instead of walking the page-table directly. Cc: Marc Zyngier Signed-off-by: Quentin Perret Signed-off-by: Will Deacon --- arch/arm64/kvm/mmu.c | 22 +--------------------- 1 file changed, 1 insertion(+), 21 deletions(-) diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 6b4479057df6..30ade01cb179 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -1310,27 +1310,7 @@ static void stage2_wp_p4ds(struct kvm_s2_mmu *mmu, pgd_t *pgd, static void stage2_wp_range(struct kvm_s2_mmu *mmu, phys_addr_t addr, phys_addr_t end) { struct kvm *kvm = mmu->kvm; - pgd_t *pgd; - phys_addr_t next; - - pgd = mmu->pgd + stage2_pgd_index(kvm, addr); - do { - /* - * Release kvm_mmu_lock periodically if the memory region is - * large. Otherwise, we may see kernel panics with - * CONFIG_DETECT_HUNG_TASK, CONFIG_LOCKUP_DETECTOR, - * CONFIG_LOCKDEP. Additionally, holding the lock too long - * will also starve other vCPUs. We have to also make sure - * that the page tables are not freed while we released - * the lock. - */ - cond_resched_lock(&kvm->mmu_lock); - if (!READ_ONCE(mmu->pgd)) - break; - next = stage2_pgd_addr_end(kvm, addr, end); - if (stage2_pgd_present(kvm, *pgd)) - stage2_wp_p4ds(mmu, pgd, addr, next); - } while (pgd++, addr = next, addr != end); + stage2_apply_range_resched(kvm, addr, end, kvm_pgtable_stage2_wrprotect); } /** -- 2.28.0.rc0.142.g3c755180ce-goog _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm