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 CB79CC433DF for ; Tue, 18 Aug 2020 13:29:01 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 85E742080C for ; Tue, 18 Aug 2020 13:29:01 +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="RiaqtRs6" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 85E742080C 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 3D5864BB98; Tue, 18 Aug 2020 09:29:01 -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 AqLZCMrOeDy6; Tue, 18 Aug 2020 09:29:00 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 2BB194BF5D; Tue, 18 Aug 2020 09:29:00 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id D57434B4DE for ; Tue, 18 Aug 2020 09:28:58 -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 hzGe1jINV-0H for ; Tue, 18 Aug 2020 09:28:57 -0400 (EDT) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id D1F6C4BD4F for ; Tue, 18 Aug 2020 09:28:57 -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 98A25207D3; Tue, 18 Aug 2020 13:28:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597757337; bh=Bpbc28/zv8Ky5wgxNZEag8t6lkulUyz2oIB1kh5zqmk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RiaqtRs6Cu407+xrBHWq5j+edbB7KDj8p0nSLqc9FlTil+bxIGvQl3CjxIl5ab5MZ vLKCQYipVeAG9AItEAcVzXuojhLkexWI8PV/q5snrKYBy9HhiyHpz9Mc240HIi4hQ1 FXL36b+CtFJfBUIioIEW1phpAL8hWedV43ftIn/k= From: Will Deacon To: kvmarm@lists.cs.columbia.edu Subject: [PATCH v2 14/22] KVM: arm64: Convert write-protect operation to generic page-table API Date: Tue, 18 Aug 2020 14:28:10 +0100 Message-Id: <20200818132818.16065-15-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200818132818.16065-1-will@kernel.org> References: <20200818132818.16065-1-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 | 25 ++++--------------------- 1 file changed, 4 insertions(+), 21 deletions(-) diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 98815f6b8471..60f021430fcc 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -66,6 +66,9 @@ static bool is_iomap(unsigned long flags) ret; \ }) +#define stage2_apply_range_resched(kvm, addr, end, fn) \ + stage2_apply_range(kvm, addr, end, fn, true) + static bool memslot_is_logging(struct kvm_memory_slot *memslot) { return memslot->dirty_bitmap && !(memslot->flags & KVM_MEM_READONLY); @@ -1293,27 +1296,7 @@ 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); } /** -- 2.28.0.220.ged08abb693-goog _______________________________________________ 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=-13.0 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 D1E34C433DF for ; Tue, 18 Aug 2020 13:32:54 +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 9F7082076D for ; Tue, 18 Aug 2020 13:32:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="eaFXCzEk"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="RiaqtRs6" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9F7082076D 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=ZkwlZW9FUl9u7aj8mFx3qmH8f0ETgv9/Zohk1kH+tik=; b=eaFXCzEkGZj7kpZGaEH3e3dy0 HE3+ANGTflRm4AuO1gzybQteAWismg2kel5OprhU++g7hLvS3yQenhmP2xsU3lUTztlWoYHOhIrW4 02Y3KtWAVUhYaR3JZgVPWDsZoe1uIwuO/tdm7NWc8bgtbpNU2gImTlKbxfLT69GNsKQk3wM13pUN1 UeA5fiB1LtKWGV5KPEK/hfVJ8ixheEj2oE9UYvNy8KQ1RSEylOw/6/9jJQFD2Ft49nqV4dqC7IHHF DrxdlW8Tp6JR42r+v1YaOdTGX6vZlr6+Oz6L4LEFc0/t7aBTX3rJZ7A05uvP+SGFbJazVYy/leqVU F8l0wpl0g==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1k81hN-0000A7-E0; Tue, 18 Aug 2020 13:30:45 +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 1k81fe-0007nG-04 for linux-arm-kernel@lists.infradead.org; Tue, 18 Aug 2020 13:28:59 +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 98A25207D3; Tue, 18 Aug 2020 13:28:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597757337; bh=Bpbc28/zv8Ky5wgxNZEag8t6lkulUyz2oIB1kh5zqmk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RiaqtRs6Cu407+xrBHWq5j+edbB7KDj8p0nSLqc9FlTil+bxIGvQl3CjxIl5ab5MZ vLKCQYipVeAG9AItEAcVzXuojhLkexWI8PV/q5snrKYBy9HhiyHpz9Mc240HIi4hQ1 FXL36b+CtFJfBUIioIEW1phpAL8hWedV43ftIn/k= From: Will Deacon To: kvmarm@lists.cs.columbia.edu Subject: [PATCH v2 14/22] KVM: arm64: Convert write-protect operation to generic page-table API Date: Tue, 18 Aug 2020 14:28:10 +0100 Message-Id: <20200818132818.16065-15-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200818132818.16065-1-will@kernel.org> References: <20200818132818.16065-1-will@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200818_092858_208769_1D4325A1 X-CRM114-Status: GOOD ( 14.23 ) 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, 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 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 | 25 ++++--------------------- 1 file changed, 4 insertions(+), 21 deletions(-) diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 98815f6b8471..60f021430fcc 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -66,6 +66,9 @@ static bool is_iomap(unsigned long flags) ret; \ }) +#define stage2_apply_range_resched(kvm, addr, end, fn) \ + stage2_apply_range(kvm, addr, end, fn, true) + static bool memslot_is_logging(struct kvm_memory_slot *memslot) { return memslot->dirty_bitmap && !(memslot->flags & KVM_MEM_READONLY); @@ -1293,27 +1296,7 @@ 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); } /** -- 2.28.0.220.ged08abb693-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel