From patchwork Thu Nov 8 14:46:34 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 994933 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="kSRs6ysz"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 42rR2p2jymz9sDb for ; Fri, 9 Nov 2018 01:47:30 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727508AbeKIAXN (ORCPT ); Thu, 8 Nov 2018 19:23:13 -0500 Received: from mail-pg1-f195.google.com ([209.85.215.195]:40864 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727471AbeKIAXN (ORCPT ); Thu, 8 Nov 2018 19:23:13 -0500 Received: by mail-pg1-f195.google.com with SMTP id z10so7070137pgp.7; Thu, 08 Nov 2018 06:47:23 -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=j64bsuj3x4K+30VilhvqfE2jLibklRus8fQn4GALxqw=; b=kSRs6yszY4IfNoC8OPqCy4ksjyyfO8vPsN92AYgcgXtqlwYrp7W9CsBb2pFWYCOWYT hzLAcMLmlTe+72KX5oE2NnIPaiws0ZyzwJ1rivC0GnmGbAZX9qFQcKu7IRKTTa5fcNt7 AntjL+6k2KUftFi1oRrs1ffyS4sDX3FeUL6voPxTS87oBXQHQsw9+BohJqmSGOD0u38j wxTVXVp6bSM0RFLXlLNxSCfv+y2byQousc+mACuHCor4/2CnpmJGhCYH2YpOgjKjrhJ5 W3G1FjZFxRVZeNqXFC1H1e5VsjKK0ew0oJJ2igzrk6MVip4mlHEpR0D+IwRk8W/isF9o qR0A== 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=j64bsuj3x4K+30VilhvqfE2jLibklRus8fQn4GALxqw=; b=hpsq9bE20VGHBYJpVn5CX5lpZ6OHGaRbtNviFzPvdObCaVGbRPzNQcAiTtbg30hlXU f+MBqKL5YqLjxOSvDgP1WzMBGhK8rPyBkWF9SxJniwCAXCslemv4JbYGz9Aif1wL0tgo xancFXy6ArewRXGQ2fqhi3Y97u2N2a1wGZ7byssPpqmSgMPXu3+NV+JYYIRFTNYb9W9W 1X/4dBuPZJF3uxT8gSjGUvCEtoJCFRDQKmrEjpTDXX8gj7lEGsn5GT/bLCXiN4cXe1II pMRA4X2ACD3bWG6SpJzs4ahoG/k51morud79S/SQEtQvERbhBME8U1iTy8SjPCkv6Kvn kHwg== X-Gm-Message-State: AGRZ1gLtVty/RkYLzzmQe/E3wBH0zBfEleS2e3np0E2MHRQ+5LI263qU VnaIpETasxv/E51gf1zPNlQ= X-Google-Smtp-Source: AJdET5f41UCbLn034dxs1ngicJBuoodp6p58X0q0RKH54NooSvsVOJCzcR34aj+o0PpgSKVU2xXoug== X-Received: by 2002:a63:1766:: with SMTP id 38mr2232968pgx.299.1541688442907; Thu, 08 Nov 2018 06:47:22 -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.119.2018.11.08.06.47.15 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 08 Nov 2018 06:47:22 -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@linux-mips.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: [Resend PATCH V5 5/10] KVM/MMU: Add tlb flush with range helper function Date: Thu, 8 Nov 2018 22:46:34 +0800 Message-Id: <20181108144639.11206-5-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: 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 add wrapper functions for tlb_remote_flush_with_range callback and flush tlb directly in kvm_mmu_zap_collapsible_spte(). kvm_mmu_zap_collapsible_spte() returns flush request to the slot_handle_leaf() and the latter does flush on demand. When range flush is available, make kvm_mmu_zap_collapsible_spte() to flush tlb with range directly to avoid returning range back to slot_handle_leaf(). Signed-off-by: Lan Tianyu --- Change since V4: Remove flush list interface and flush tlb directly in kvm_mmu_zap_collapsible_spte(). Change since V3: Remove code of updating "tlbs_dirty" Change since V2: Fix comment in the kvm_flush_remote_tlbs_with_range() --- arch/x86/kvm/mmu.c | 37 ++++++++++++++++++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index cf5f572f2305..c1d383532066 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -264,6 +264,35 @@ 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) +{ + int ret = -ENOTSUPP; + + if (range && kvm_x86_ops->tlb_remote_flush_with_range) + ret = kvm_x86_ops->tlb_remote_flush_with_range(kvm, range); + + if (ret) + kvm_flush_remote_tlbs(kvm); +} + +static void kvm_flush_remote_tlbs_with_address(struct kvm *kvm, + u64 start_gfn, u64 pages) +{ + struct kvm_tlb_range range; + + range.start_gfn = start_gfn; + range.pages = pages; + + kvm_flush_remote_tlbs_with_range(kvm, &range); +} + void kvm_mmu_set_mmio_spte_mask(u64 mmio_mask, u64 mmio_value) { BUG_ON((mmio_mask & mmio_value) != mmio_value); @@ -5680,7 +5709,13 @@ static bool kvm_mmu_zap_collapsible_spte(struct kvm *kvm, !kvm_is_reserved_pfn(pfn) && PageTransCompoundMap(pfn_to_page(pfn))) { pte_list_remove(rmap_head, sptep); - need_tlb_flush = 1; + + if (kvm_available_flush_tlb_with_range()) + kvm_flush_remote_tlbs_with_address(kvm, sp->gfn, + KVM_PAGES_PER_HPAGE(sp->role.level)); + else + need_tlb_flush = 1; + goto restart; } }