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=-8.5 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,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 D369AECDE47 for ; Thu, 8 Nov 2018 14:47:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9D0F22081D for ; Thu, 8 Nov 2018 14:47:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="tqkrP4DX" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9D0F22081D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727803AbeKIAXl (ORCPT ); Thu, 8 Nov 2018 19:23:41 -0500 Received: from mail-pl1-f196.google.com ([209.85.214.196]:33352 "EHLO mail-pl1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727752AbeKIAXk (ORCPT ); Thu, 8 Nov 2018 19:23:40 -0500 Received: by mail-pl1-f196.google.com with SMTP id w22-v6so6318091plk.0; Thu, 08 Nov 2018 06:47:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=XvvPy7Q4qFhIcL2nJjG34LofSZ7R5VeljzNsh5L5Nb8=; b=tqkrP4DXCGpDBR3SPzhacbL11scSwmpgs/P2oTwWjwFJjzuhFGVmKIUSq7NsO1A/h6 UQKToCuVpQAAB3j1hYxqCCVRl3bt07sjJuvah9zGmeq6QduU40NXh+6mepcUYhzIG3zN V6W/eNHF/9zpa3iIX+3H8tM7m4x+XaEGr3y5D6bnBRo+/t/kMQyuu1bctE+pzAtR4RRb jI4Sqn6znnRG6Txtzg5q5O0glyQpp4L2tcT+u1Ll3WoBuMDIiyDUXEfp9jJkBf0TxBsV Vt499Xw0Kt0ZIcKjFrhqiNPyet6gOX9TzMbSMyCKnAScfRkyup8IsJXlygPPiWznOXFS qxFQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=XvvPy7Q4qFhIcL2nJjG34LofSZ7R5VeljzNsh5L5Nb8=; b=CuZLN7LqwvQvsD9OvZ/i4YaorW0JpPHuuk7wvNz/5x3oD/mSX2A45SzoaygY6m9eaw hydrENMZBemSei5ZVI9op5x2jKaVS56t0A4aFrxZpkW63DJG7AITKRgUKA+quvlpJYsG tmdrzgxzgwOsWNwkbEUIjsm5x4prbHkeKn9gmUt049iMNBKYhcmf/ku3ecKZkaqHpl9+ dVm7M7b3VeAeB+KNG5lypLJA+gA4euDI2IZAqT/ptuvhSuA67xM53ZGusfM/SUI78nKV MBTdwaNEeyZP9+bOvN2ScdNbk2n+yvw/s6Wa+YzTH+non/W6xgBS+7xthtCkez+Teu5v H1Yw== X-Gm-Message-State: AGRZ1gLzcARrzJ7ZA7LqoKGeSIUi2IF+coYgf/JBpw3Gmbwomnxmo4/0 dFBC/1PSQoejuXmOSpdI8zo= X-Google-Smtp-Source: AJdET5eEKZINEqxIDbSRDNXwx5RE3FK/Me659LYJ8qI20O28MNCgLwjpHVhV3ThVMqcYCozrSHoslg== X-Received: by 2002:a17:902:4c08:: with SMTP id a8-v6mr4793628ple.211.1541688470615; Thu, 08 Nov 2018 06:47:50 -0800 (PST) Received: from localhost.corp.microsoft.com ([2404:f801:9000:18:d9bf:62c6:740b:9fc4]) by smtp.googlemail.com with ESMTPSA id k75-v6sm11526731pfb.119.2018.11.08.06.47.46 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 08 Nov 2018 06:47:50 -0800 (PST) From: lantianyu1986@gmail.com X-Google-Original-From: Tianyu.Lan@microsoft.com Cc: Lan Tianyu , pbonzini@redhat.com, rkrcmar@redhat.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, michael.h.kelley@microsoft.com, kys@microsoft.com, vkuznets@redhat.com, linux@armlinux.org.uk Subject: [Resend PATCH V5 10/10] KVM/MMU: Flush tlb directly in the kvm_zap_gfn_range() Date: Thu, 8 Nov 2018 22:46:39 +0800 Message-Id: <20181108144639.11206-10-Tianyu.Lan@microsoft.com> X-Mailer: git-send-email 2.14.4 In-Reply-To: <20181108144639.11206-1-Tianyu.Lan@microsoft.com> References: <20181108144639.11206-1-Tianyu.Lan@microsoft.com> To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lan Tianyu Originally, flush tlb is done by slot_handle_level_range(). This patch is to flush tlb directly in the kvm_zap_gfn_range() when range flush is available. Signed-off-by: Lan Tianyu --- Change since v4: Move operation of setting flush_tlb out of for loop. --- arch/x86/kvm/mmu.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 39e0e2572710..898560b0807c 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -5633,8 +5633,13 @@ void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end) { struct kvm_memslots *slots; struct kvm_memory_slot *memslot; + bool flush_tlb = true; + bool flush = false; int i; + if (kvm_available_flush_tlb_with_range()) + flush_tlb = false; + spin_lock(&kvm->mmu_lock); for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) { slots = __kvm_memslots(kvm, i); @@ -5646,12 +5651,17 @@ void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end) if (start >= end) continue; - slot_handle_level_range(kvm, memslot, kvm_zap_rmapp, - PT_PAGE_TABLE_LEVEL, PT_MAX_HUGEPAGE_LEVEL, - start, end - 1, true); + flush |= slot_handle_level_range(kvm, memslot, + kvm_zap_rmapp, PT_PAGE_TABLE_LEVEL, + PT_MAX_HUGEPAGE_LEVEL, start, + end - 1, flush_tlb); } } + if (flush) + kvm_flush_remote_tlbs_with_address(kvm, gfn_start, + gfn_end - gfn_start + 1); + spin_unlock(&kvm->mmu_lock); } -- 2.14.4