From patchwork Fri Feb 22 15:06:34 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 1046957 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=kvm-ppc-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="OMYxgFb/"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 445ZTN6Bzrz9s9y for ; Sat, 23 Feb 2019 02:07:52 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727216AbfBVPHv (ORCPT ); Fri, 22 Feb 2019 10:07:51 -0500 Received: from mail-pf1-f195.google.com ([209.85.210.195]:40100 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726531AbfBVPHv (ORCPT ); Fri, 22 Feb 2019 10:07:51 -0500 Received: by mail-pf1-f195.google.com with SMTP id h1so1236868pfo.7; Fri, 22 Feb 2019 07:07:50 -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=7Go7voUR7PP9IbtPtHYJZJ9KLXpiKBFH7bP0tDDsjB4=; b=OMYxgFb/TH+McvC6/yX42s2bOKqIFuH7liGSdQk8dA6R6rivWAFzdcTvJKKIW7G4nu lXYzdbjHlZnvOqn1M4ZA9z730vCqf2E1ybCCqsj65itbbqBKwDX6hpuZHXoy0miurviB kxP6/HeP2wKEXEVp3a+Ug85E1C5++G9MDrdRQLX225uRpiuqsgIHz8qEUnfGUhbFyBst nrdGgq8aT26OjCzFjuLr/3y3vhcfqcb4viY/i5FAVoqBRY4uuiJ5fu4uyigEKBWrsW/O YyIgfPonVe/xzXniC19S3KWG4/oNp0oM5MXd41ZVqSHpzwaZL+UjWa7IuouoIhAcXe+t 2ySg== 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=7Go7voUR7PP9IbtPtHYJZJ9KLXpiKBFH7bP0tDDsjB4=; b=mfCpPwvO8jMXfEXZhhI+GwQ7LvAakp3d1P9vRspkbgNOnkk8DQj+84K/WHT5O+Yddc 9l2kzEfJCDNh4d+PSwtVbevHtgsbMMt5fL+DW2bKC7EDi5Ed6PJSPksZeK46x5tJj6+F SglE2JyjL/IBL8+m4YVGXDN17JRWjdMaB7m6cy7xySlrpQFc2rur63GnOMEJGvwUyVEu PobNyn+aJvE16F+6CjKrXNZjbD4+6IJcPrmmYXkHzz8k+sLhFMlwX973o8BPRzyY4S9q Y9rmsQLQ5KxCmur89w8bfMY/hFgVISOSSs5jTXhCiQs2IJlcyNmOLviJGecW/hyB0Wt9 a+qQ== X-Gm-Message-State: AHQUAua4gGebPctgV2gU8g8R4sscTPV4mVSxd0kDOofWaV48tsRPWmz1 OnsFHnM1z6LX9Kuph5f595k= X-Google-Smtp-Source: AHgI3IZHlSqh4FBsJPrlCgkevIFZismIyLuu2+1WWH0cRzRKJdFO+uEViGuOXjTF2NY5mtMA0QRKFQ== X-Received: by 2002:a63:1260:: with SMTP id 32mr4435319pgs.278.1550848070153; Fri, 22 Feb 2019 07:07:50 -0800 (PST) Received: from localhost.corp.microsoft.com ([167.220.255.67]) by smtp.googlemail.com with ESMTPSA id a4sm6151780pga.52.2019.02.22.07.07.42 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 22 Feb 2019 07:07:49 -0800 (PST) From: lantianyu1986@gmail.com X-Google-Original-From: Tianyu.Lan@microsoft.com Cc: Lan Tianyu , christoffer.dall@arm.com, marc.zyngier@arm.com, linux@armlinux.org.uk, catalin.marinas@arm.com, will.deacon@arm.com, jhogan@kernel.org, ralf@linux-mips.org, paul.burton@mips.com, paulus@ozlabs.org, benh@kernel.crashing.org, mpe@ellerman.id.au, pbonzini@redhat.com, rkrcmar@redhat.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, x86@kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, michael.h.kelley@microsoft.com, kys@microsoft.com, vkuznets@redhat.com Subject: [PATCH V3 7/10] KVM: Use tlb range flush in the kvm_vm_ioctl_get/clear_dirty_log() Date: Fri, 22 Feb 2019 23:06:34 +0800 Message-Id: <20190222150637.2337-8-Tianyu.Lan@microsoft.com> X-Mailer: git-send-email 2.14.4 In-Reply-To: <20190222150637.2337-1-Tianyu.Lan@microsoft.com> References: <20190222150637.2337-1-Tianyu.Lan@microsoft.com> To: unlisted-recipients:; (no To-header on input) Sender: kvm-ppc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org From: Lan Tianyu This patch is to use tlb range flush to flush memslot's in the kvm_vm_ioctl_get/clear_dirty_log() instead of flushing tlbs of entire ept page table when range flush is available. Signed-off-by: Lan Tianyu --- arch/x86/kvm/mmu.c | 8 +------- arch/x86/kvm/mmu.h | 7 +++++++ arch/x86/kvm/x86.c | 16 ++++++++++++---- 3 files changed, 20 insertions(+), 11 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 60b1771e400e..e9a727aad603 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -266,12 +266,6 @@ static void mmu_spte_set(u64 *sptep, u64 spte); static union kvm_mmu_page_role kvm_mmu_calc_root_page_role(struct kvm_vcpu *vcpu); - -static inline bool kvm_available_flush_tlb_with_range(void) -{ - return kvm_x86_ops->tlb_remote_flush_with_range; -} - static void kvm_flush_remote_tlbs_with_range(struct kvm *kvm, struct kvm_tlb_range *range) { @@ -284,7 +278,7 @@ static void kvm_flush_remote_tlbs_with_range(struct kvm *kvm, kvm_flush_remote_tlbs(kvm); } -static void kvm_flush_remote_tlbs_with_address(struct kvm *kvm, +void kvm_flush_remote_tlbs_with_address(struct kvm *kvm, u64 start_gfn, u64 pages) { struct kvm_tlb_range range; diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h index bbdc60f2fae8..5e0d9418b912 100644 --- a/arch/x86/kvm/mmu.h +++ b/arch/x86/kvm/mmu.h @@ -63,6 +63,13 @@ void kvm_init_shadow_ept_mmu(struct kvm_vcpu *vcpu, bool execonly, bool kvm_can_do_async_pf(struct kvm_vcpu *vcpu); int kvm_handle_page_fault(struct kvm_vcpu *vcpu, u64 error_code, u64 fault_address, char *insn, int insn_len); +void kvm_flush_remote_tlbs_with_address(struct kvm *kvm, + u64 start_gfn, u64 pages); + +static inline bool kvm_available_flush_tlb_with_range(void) +{ + return kvm_x86_ops->tlb_remote_flush_with_range; +} static inline unsigned int kvm_mmu_available_pages(struct kvm *kvm) { diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 40d8272bee96..35738a7256f4 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4448,9 +4448,13 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) * kvm_mmu_slot_remove_write_access(). */ lockdep_assert_held(&kvm->slots_lock); - if (flush) - kvm_flush_remote_tlbs(kvm); + if (flush) { + struct kvm_memory_slot *memslot = kvm_get_memslot(kvm, + log->slot); + kvm_flush_remote_tlbs_with_address(kvm, memslot->base_gfn, + memslot->npages); + } mutex_unlock(&kvm->slots_lock); return r; } @@ -4475,9 +4479,13 @@ int kvm_vm_ioctl_clear_dirty_log(struct kvm *kvm, struct kvm_clear_dirty_log *lo * kvm_mmu_slot_remove_write_access(). */ lockdep_assert_held(&kvm->slots_lock); - if (flush) - kvm_flush_remote_tlbs(kvm); + if (flush) { + struct kvm_memory_slot *memslot = kvm_get_memslot(kvm, + log->slot); + kvm_flush_remote_tlbs_with_address(kvm, memslot->base_gfn, + memslot->npages); + } mutex_unlock(&kvm->slots_lock); return r; }