From patchwork Thu Nov 8 09:14:41 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 10673819 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9E15F109C for ; Thu, 8 Nov 2018 09:15:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8D6002CF99 for ; Thu, 8 Nov 2018 09:15:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7F0372CF9E; Thu, 8 Nov 2018 09:15:43 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F35002CF99 for ; Thu, 8 Nov 2018 09:15:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726856AbeKHSuK (ORCPT ); Thu, 8 Nov 2018 13:50:10 -0500 Received: from mail-pl1-f193.google.com ([209.85.214.193]:46252 "EHLO mail-pl1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726133AbeKHSuK (ORCPT ); Thu, 8 Nov 2018 13:50:10 -0500 Received: by mail-pl1-f193.google.com with SMTP id c13-v6so9246997plz.13; Thu, 08 Nov 2018 01:15:36 -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=BZQ//cVaU9tNuNQAUhzd/1Jm0JpGnlnc9pX5EOH8jfE=; b=LxIFTCt/GTcyxU0v9nk4twJxEGVigy1BlU2eCQPGqVBOUFZaAlHLG32Ki6yJcGNp/s xPuN5EnahHYlwz4TQ5jIcInfJ9az7mLvFgNuxRiU30b6aj2+u/60bs+5Q26rAKVSHhK+ sNgWw+l55/iP7cf8hrj3jUuSQjqh4ZEdq9r6CKTj9oeYH8xmR56eUgINLkkc1G9SmSic ITdNvpD+CaRbBHfsPGhc76nDGi58sL/Tu/DUhBbg6YSGJVEugPvCqoU1jK18V00xzKX0 +5j8Wj4Uy+5p0MpVftDhSgLtHvILx8dMaugq0NghFzrFbix6ZnUojwtP1vcGr8lb84fj JpmQ== 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=BZQ//cVaU9tNuNQAUhzd/1Jm0JpGnlnc9pX5EOH8jfE=; b=imph9MOeFCCwNVOAM7qq2kBaT5vDkdFSxWH7whcKEh5/WFpn2djA9WKrNwdJwUigVB iRdNc05GPKDyFk6UGxxQtsMmqw0yHxVi7wbbBdEvzXfJD0li6rGaSVWMC/nn9FAk/nZ9 DiAWcfgddgbqLG4N0OHNGU7OTXkviLN7yOaegVTNn++zd39awA/F3xFKK5BQGCal1fyK qm8qkU8P73Y6jnhM93fy8nGR2aSouFTmRvrr5q6KNO146G0aaxajA+CaqgMB5HPSnE0K WUzsIy0MgWdRVcmlZjESsczqh7b5kulbNDgsUgkhP5Ox5Y+sCh7cZYeqQDLi77nUiJZk DYEg== X-Gm-Message-State: AGRZ1gJrR1dPL0OrXPXP/mEzKCHkH5PXe86y2ppR7e5cmT3yN19j3Wln TIsw4YF5FiQPK4UuZ3Bb7FY= X-Google-Smtp-Source: AJdET5cjj8OCQlI0d0gch8uRXb7ma45QoRkvqCHNOyOIR5/cXRrSxwKM/LBAsOiq6x1ABZ8iRqn4JQ== X-Received: by 2002:a17:902:8210:: with SMTP id x16-v6mr3812752pln.129.1541668535729; Thu, 08 Nov 2018 01:15:35 -0800 (PST) Received: from localhost.corp.microsoft.com ([2404:f801:9000:18:d9bf:62c6:740b:9fc4]) by smtp.googlemail.com with ESMTPSA id w66-v6sm3284114pfb.51.2018.11.08.01.15.28 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 08 Nov 2018 01:15:35 -0800 (PST) From: ltykernel@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: [PATCH V5 4/10] KVM/VMX: Add hv tlb range flush support Date: Thu, 8 Nov 2018 17:14:41 +0800 Message-Id: <20181108091447.8275-5-Tianyu.Lan@microsoft.com> X-Mailer: git-send-email 2.14.4 In-Reply-To: <20181108091447.8275-1-Tianyu.Lan@microsoft.com> References: <20181108091447.8275-1-Tianyu.Lan@microsoft.com> To: unlisted-recipients:; (no To-header on input) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Lan Tianyu This patch is to register tlb_remote_flush_with_range callback with hv tlb range flush interface. Signed-off-by: Lan Tianyu --- Change since v4: - Use new function kvm_fill_hv_flush_list_func() to fill flush request. Change since v3: - Merge Vitaly's don't pass EPT configuration info to vmx_hv_remote_flush_tlb() fix. Change since v1: - Pass flush range with new hyper-v tlb flush struct rather than KVM tlb flush struct. --- arch/x86/kvm/vmx.c | 69 ++++++++++++++++++++++++++++++++++++++---------------- 1 file changed, 49 insertions(+), 20 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index edbc96cb990a..405dfbde70b2 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1567,7 +1567,38 @@ static void check_ept_pointer_match(struct kvm *kvm) to_kvm_vmx(kvm)->ept_pointers_match = EPT_POINTERS_MATCH; } -static int vmx_hv_remote_flush_tlb(struct kvm *kvm) +int kvm_fill_hv_flush_list_func(struct hv_guest_mapping_flush_list *flush, + void *data) +{ + struct kvm_tlb_range *range = data; + + return hyperv_fill_flush_guest_mapping_list(flush, range->start_gfn, + range->pages); +} + +static inline int __hv_remote_flush_tlb_with_range(struct kvm *kvm, + struct kvm_vcpu *vcpu, struct kvm_tlb_range *range) +{ + u64 ept_pointer = to_vmx(vcpu)->ept_pointer; + + /* If ept_pointer is invalid pointer, bypass flush request. */ + if (!VALID_PAGE(ept_pointer)) + return 0; + + /* + * FLUSH_GUEST_PHYSICAL_ADDRESS_SPACE hypercall needs address + * of the base of EPT PML4 table, strip off EPT configuration + * information. + */ + if (range) + return hyperv_flush_guest_mapping_range(ept_pointer & PAGE_MASK, + kvm_fill_hv_flush_list_func, (void *)range); + else + return hyperv_flush_guest_mapping(ept_pointer & PAGE_MASK); +} + +static int hv_remote_flush_tlb_with_range(struct kvm *kvm, + struct kvm_tlb_range *range) { struct kvm_vcpu *vcpu; int ret = -ENOTSUPP, i; @@ -1577,30 +1608,23 @@ static int vmx_hv_remote_flush_tlb(struct kvm *kvm) if (to_kvm_vmx(kvm)->ept_pointers_match == EPT_POINTERS_CHECK) check_ept_pointer_match(kvm); - /* - * FLUSH_GUEST_PHYSICAL_ADDRESS_SPACE hypercall needs the address of the - * base of EPT PML4 table, strip off EPT configuration information. - * If ept_pointer is invalid pointer, bypass the flush request. - */ if (to_kvm_vmx(kvm)->ept_pointers_match != EPT_POINTERS_MATCH) { - kvm_for_each_vcpu(i, vcpu, kvm) { - if (!VALID_PAGE(to_vmx(vcpu)->ept_pointer)) - return 0; - - ret |= hyperv_flush_guest_mapping( - to_vmx(vcpu)->ept_pointer & PAGE_MASK); - } + kvm_for_each_vcpu(i, vcpu, kvm) + ret |= __hv_remote_flush_tlb_with_range( + kvm, vcpu, range); } else { - if (!VALID_PAGE(to_vmx(kvm_get_vcpu(kvm, 0))->ept_pointer)) - return 0; - - ret = hyperv_flush_guest_mapping( - to_vmx(kvm_get_vcpu(kvm, 0))->ept_pointer & PAGE_MASK); + ret = __hv_remote_flush_tlb_with_range(kvm, + kvm_get_vcpu(kvm, 0), range); } spin_unlock(&to_kvm_vmx(kvm)->ept_pointer_lock); return ret; } + +static int hv_remote_flush_tlb(struct kvm *kvm) +{ + return hv_remote_flush_tlb_with_range(kvm, NULL); +} #else /* !IS_ENABLED(CONFIG_HYPERV) */ static inline void evmcs_write64(unsigned long field, u64 value) {} static inline void evmcs_write32(unsigned long field, u32 value) {} @@ -7957,8 +7981,11 @@ static __init int hardware_setup(void) #if IS_ENABLED(CONFIG_HYPERV) if (ms_hyperv.nested_features & HV_X64_NESTED_GUEST_MAPPING_FLUSH - && enable_ept) - kvm_x86_ops->tlb_remote_flush = vmx_hv_remote_flush_tlb; + && enable_ept) { + kvm_x86_ops->tlb_remote_flush = hv_remote_flush_tlb; + kvm_x86_ops->tlb_remote_flush_with_range = + hv_remote_flush_tlb_with_range; + } #endif if (!cpu_has_vmx_ple()) { @@ -11567,6 +11594,8 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) vmx->nested.posted_intr_nv = -1; vmx->nested.current_vmptr = -1ull; + vmx->ept_pointer = INVALID_PAGE; + vmx->msr_ia32_feature_control_valid_bits = FEATURE_CONTROL_LOCKED; /* From patchwork Thu Nov 8 09:14:45 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 10673827 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8AAB018FD for ; Thu, 8 Nov 2018 09:16:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 799422CFA7 for ; 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Thu, 08 Nov 2018 01:16:02 -0800 (PST) Received: from localhost.corp.microsoft.com ([2404:f801:9000:18:d9bf:62c6:740b:9fc4]) by smtp.googlemail.com with ESMTPSA id w66-v6sm3284114pfb.51.2018.11.08.01.15.58 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 08 Nov 2018 01:16:02 -0800 (PST) From: ltykernel@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: [PATCH V5 8/10] KVM/MMU: Move tlb flush in kvm_set_pte_rmapp() to kvm_mmu_notifier_change_pte() Date: Thu, 8 Nov 2018 17:14:45 +0800 Message-Id: <20181108091447.8275-9-Tianyu.Lan@microsoft.com> X-Mailer: git-send-email 2.14.4 In-Reply-To: <20181108091447.8275-1-Tianyu.Lan@microsoft.com> References: <20181108091447.8275-1-Tianyu.Lan@microsoft.com> To: unlisted-recipients:; (no To-header on input) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Lan Tianyu This patch is to move tlb flush in kvm_set_pte_rmapp() to kvm_mmu_notifier_change_pte() in order to avoid redundant tlb flush. Signed-off-by: Lan Tianyu --- arch/x86/kvm/mmu.c | 8 ++------ virt/kvm/kvm_main.c | 5 ++++- 2 files changed, 6 insertions(+), 7 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 06bfcd327ef6..b13b419166c4 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -1776,10 +1776,7 @@ static int kvm_set_pte_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head, } } - if (need_flush) - kvm_flush_remote_tlbs(kvm); - - return 0; + return need_flush; } struct slot_rmap_walk_iterator { @@ -1915,8 +1912,7 @@ int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end) int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte) { - kvm_handle_hva(kvm, hva, (unsigned long)&pte, kvm_set_pte_rmapp); - return 0; + return kvm_handle_hva(kvm, hva, (unsigned long)&pte, kvm_set_pte_rmapp); } static int kvm_age_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head, diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 2679e476b6c3..dac4b0446aed 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -354,7 +354,10 @@ static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn, idx = srcu_read_lock(&kvm->srcu); spin_lock(&kvm->mmu_lock); kvm->mmu_notifier_seq++; - kvm_set_spte_hva(kvm, address, pte); + + if (kvm_set_spte_hva(kvm, address, pte)) + kvm_flush_remote_tlbs(kvm); + spin_unlock(&kvm->mmu_lock); srcu_read_unlock(&kvm->srcu, idx); } From patchwork Thu Nov 8 09:14:46 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 10673825 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 32788109C for ; Thu, 8 Nov 2018 09:16:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1DF032CFA9 for ; Thu, 8 Nov 2018 09:16:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0C46F2CFAA; Thu, 8 Nov 2018 09:16:22 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A30972CFA9 for ; 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Thu, 08 Nov 2018 01:16:06 -0800 (PST) From: ltykernel@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: [PATCH V5 9/10] KVM/MMU: Flush tlb directly in the kvm_set_pte_rmapp() Date: Thu, 8 Nov 2018 17:14:46 +0800 Message-Id: <20181108091447.8275-10-Tianyu.Lan@microsoft.com> X-Mailer: git-send-email 2.14.4 In-Reply-To: <20181108091447.8275-1-Tianyu.Lan@microsoft.com> References: <20181108091447.8275-1-Tianyu.Lan@microsoft.com> To: unlisted-recipients:; (no To-header on input) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Lan Tianyu This patch is to flush tlb directly in the kvm_set_pte_rmapp() and return 0. Signed-off-by: Lan Tianyu --- arch/x86/kvm/mmu.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index b13b419166c4..39e0e2572710 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -1776,6 +1776,11 @@ static int kvm_set_pte_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head, } } + if (need_flush && kvm_available_flush_tlb_with_range()) { + kvm_flush_remote_tlbs_with_address(kvm, gfn, 1); + return 0; + } + return need_flush; } From patchwork Thu Nov 8 09:14:47 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 10673823 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3CC0715E9 for ; Thu, 8 Nov 2018 09:16:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2CAC52CFA7 for ; Thu, 8 Nov 2018 09:16:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2101A2CFAA; Thu, 8 Nov 2018 09:16:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0D91B2CFA7 for ; Thu, 8 Nov 2018 09:16:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726938AbeKHSup (ORCPT ); Thu, 8 Nov 2018 13:50:45 -0500 Received: from mail-pl1-f196.google.com ([209.85.214.196]:34657 "EHLO mail-pl1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726133AbeKHSup (ORCPT ); Thu, 8 Nov 2018 13:50:45 -0500 Received: by mail-pl1-f196.google.com with SMTP id f12-v6so8078252plo.1; Thu, 08 Nov 2018 01:16:11 -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=DEhtQBqXnAEIMkbcf2z0yIj3vhQ93LgYqzJ9qlXT6XP4/fd490GehyvO8sTpfp7xJ8 KrNclJnEWr09b7CucahuuqcGeVxXbdc1+vF5wbKD2AFgokvyV5srkExxl1lRAOgFrt4a jTVkTNP3Oo/N3p53aswcO2uEAEdqRJtNZMOTBLaC7ntAdCdY6p4wOadjoNcZpW/k36dc ypo6F4fNyzgkEP7XNz7ZIgxM8ESluYpM0DCRS+G5kySr+FdFl6XLVl+FCqr3CedhSgw2 naOiSDsCu5yv2LBNSbb3qA62ZvmckieMUygEfuIg56E817/yPIlTNiJYELpsDDySc/fF kBwQ== 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=RThjUuK95zgRWQuF4ALUg39A17R0r5stcmnka4S9c8RQiuti2wOXRH1JHzk0OYuOG0 3EyKgjTdKEdqqIPVwlDjPpqf4c/GCCJRBbURGCXFLbwQo+RNozNtkPIb2kbRVCAJgaAd PL5jRCkR8FktBf99LvbW3gmUx/4PqijikfGZoFAFosQ6WEwpesAl3Smt4mPrW2FuYXzn apxDfVDHjSr9+nWZ0feb242LoI+MTbAXmVN+KVcMeUSti9KCsCc9wkGl6R4Cu/F8r019 nawff4KRspPbDGIirAUgR2osq3xqrVwWos1u4Zm7C19C07m1RxmO69wdz1na+Um9r5eQ H8/g== X-Gm-Message-State: AGRZ1gJTNwpJziHAegOGYbkQizqDgSkcwWXSqaYTEDGH80DXIaryT1MD bJhbIt7xDq/tH0/7coTherE= X-Google-Smtp-Source: AJdET5cTpSSOy5lYBlq8QiWi/JCLzDziKFJCGQlK6RGhGZBDjaTSK2Qk1X1Wh+zJ10tF2u4eRMN/Ig== X-Received: by 2002:a17:902:1122:: with SMTP id d31-v6mr3801300pla.259.1541668571406; Thu, 08 Nov 2018 01:16:11 -0800 (PST) Received: from localhost.corp.microsoft.com ([2404:f801:9000:18:d9bf:62c6:740b:9fc4]) by smtp.googlemail.com with ESMTPSA id w66-v6sm3284114pfb.51.2018.11.08.01.16.07 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 08 Nov 2018 01:16:11 -0800 (PST) From: ltykernel@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: [PATCH V5 10/10] KVM/MMU: Flush tlb directly in the kvm_zap_gfn_range() Date: Thu, 8 Nov 2018 17:14:47 +0800 Message-Id: <20181108091447.8275-11-Tianyu.Lan@microsoft.com> X-Mailer: git-send-email 2.14.4 In-Reply-To: <20181108091447.8275-1-Tianyu.Lan@microsoft.com> References: <20181108091447.8275-1-Tianyu.Lan@microsoft.com> To: unlisted-recipients:; (no To-header on input) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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); }