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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0ACC7C43334 for ; Mon, 6 Jun 2022 08:37:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231866AbiFFIhK (ORCPT ); Mon, 6 Jun 2022 04:37:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34026 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231820AbiFFIhH (ORCPT ); Mon, 6 Jun 2022 04:37:07 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 0BF98323 for ; Mon, 6 Jun 2022 01:37:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1654504621; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=hmMftjQOLVdsLqMyLckbK0veFW1TzLxfYK20GLJQzW0=; b=gf2C5nTRrad3vnCXYansUAL7l7vIXh45aenfgSw/Yg2Yi+HCF0pyppivvTMfUGIVDedvHJ s30ynZfiqaBEM30Zl2tNehMQOlr2EsjC040k6tpBvrZYCn92NFNB5kBvHRUI+2pOIxDyFU 72I/q0tsy+R71i1lR19UtXgeuFFvdd0= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-146-qHr9AHdtOwWOOsLHwr1T2w-1; Mon, 06 Jun 2022 04:36:59 -0400 X-MC-Unique: qHr9AHdtOwWOOsLHwr1T2w-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 4E3BF29ABA23; Mon, 6 Jun 2022 08:36:59 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.40.193.53]) by smtp.corp.redhat.com (Postfix) with ESMTP id D352F1121314; Mon, 6 Jun 2022 08:36:56 +0000 (UTC) From: Vitaly Kuznetsov To: kvm@vger.kernel.org, Paolo Bonzini Cc: Sean Christopherson , Wanpeng Li , Jim Mattson , Michael Kelley , Siddharth Chandrasekaran , Yuan Yao , Maxim Levitsky , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v6 00/38] KVM: x86: hyper-v: Fine-grained TLB flush + L2 TLB flush features Date: Mon, 6 Jun 2022 10:36:17 +0200 Message-Id: <20220606083655.2014609-1-vkuznets@redhat.com> MIME-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Changes since v5: - Rebase to the latest kvm/queue [55371f1d0c01]. - "KVM: nVMX: hyper-v: Cache VP assist page in 'struct kvm_vcpu_hv'" patch added. This is later used for both nSVM and nVMX to avoid reading VP assist page from atomic contexts. Original description: Currently, KVM handles HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST{,EX} requests by flushing the whole VPID and this is sub-optimal. This series introduces the required mechanism to make handling of these requests more fine-grained by flushing individual GVAs only (when requested). On this foundation, "Direct Virtual Flush" Hyper-V feature is implemented. The feature allows L0 to handle Hyper-V TLB flush hypercalls directly at L0 without the need to reflect the exit to L1. This has at least two benefits: reflecting vmexit and the consequent vmenter are avoided + L0 has precise information whether the target vCPU is actually running (and thus requires a kick). Sean Christopherson (1): KVM: x86: hyper-v: Add helper to read hypercall data for array Vitaly Kuznetsov (37): KVM: x86: Rename 'enable_direct_tlbflush' to 'enable_l2_tlb_flush' KVM: x86: hyper-v: Resurrect dedicated KVM_REQ_HV_TLB_FLUSH flag KVM: x86: hyper-v: Introduce TLB flush fifo KVM: x86: hyper-v: Handle HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST{,EX} calls gently KVM: x86: hyper-v: Expose support for extended gva ranges for flush hypercalls KVM: x86: Prepare kvm_hv_flush_tlb() to handle L2's GPAs x86/hyperv: Introduce HV_MAX_SPARSE_VCPU_BANKS/HV_VCPUS_PER_SPARSE_BANK constants KVM: x86: hyper-v: Use HV_MAX_SPARSE_VCPU_BANKS/HV_VCPUS_PER_SPARSE_BANK instead of raw '64' KVM: x86: hyper-v: Don't use sparse_set_to_vcpu_mask() in kvm_hv_send_ipi() KVM: x86: hyper-v: Create a separate fifo for L2 TLB flush KVM: x86: hyper-v: Use preallocated buffer in 'struct kvm_vcpu_hv' instead of on-stack 'sparse_banks' KVM: nVMX: Keep track of hv_vm_id/hv_vp_id when eVMCS is in use KVM: nSVM: Keep track of Hyper-V hv_vm_id/hv_vp_id KVM: x86: Introduce .hv_inject_synthetic_vmexit_post_tlb_flush() nested hook KVM: x86: hyper-v: Introduce kvm_hv_is_tlb_flush_hcall() KVM: x86: hyper-v: L2 TLB flush KVM: x86: hyper-v: Introduce fast guest_hv_cpuid_has_l2_tlb_flush() check x86/hyperv: Fix 'struct hv_enlightened_vmcs' definition KVM: nVMX: hyper-v: Cache VP assist page in 'struct kvm_vcpu_hv' KVM: nVMX: hyper-v: Enable L2 TLB flush KVM: nSVM: hyper-v: Enable L2 TLB flush KVM: x86: Expose Hyper-V L2 TLB flush feature KVM: selftests: Better XMM read/write helpers KVM: selftests: Move HYPERV_LINUX_OS_ID definition to a common header KVM: selftests: Move the function doing Hyper-V hypercall to a common header KVM: selftests: Hyper-V PV IPI selftest KVM: selftests: Fill in vm->vpages_mapped bitmap in virt_map() too KVM: selftests: Export vm_vaddr_unused_gap() to make it possible to request unmapped ranges KVM: selftests: Export _vm_get_page_table_entry() KVM: selftests: Hyper-V PV TLB flush selftest KVM: selftests: Sync 'struct hv_enlightened_vmcs' definition with hyperv-tlfs.h KVM: selftests: nVMX: Allocate Hyper-V partition assist page KVM: selftests: nSVM: Allocate Hyper-V partition assist and VP assist pages KVM: selftests: Sync 'struct hv_vp_assist_page' definition with hyperv-tlfs.h KVM: selftests: evmcs_test: Introduce L2 TLB flush test KVM: selftests: Move Hyper-V VP assist page enablement out of evmcs.h KVM: selftests: hyperv_svm_test: Introduce L2 TLB flush test arch/x86/include/asm/hyperv-tlfs.h | 6 +- arch/x86/include/asm/kvm-x86-ops.h | 2 +- arch/x86/include/asm/kvm_host.h | 43 +- arch/x86/kvm/Makefile | 3 +- arch/x86/kvm/hyperv.c | 334 +++++++-- arch/x86/kvm/hyperv.h | 53 +- arch/x86/kvm/svm/hyperv.c | 18 + arch/x86/kvm/svm/hyperv.h | 48 ++ arch/x86/kvm/svm/nested.c | 39 +- arch/x86/kvm/svm/svm_onhyperv.c | 2 +- arch/x86/kvm/svm/svm_onhyperv.h | 6 +- arch/x86/kvm/trace.h | 21 +- arch/x86/kvm/vmx/evmcs.c | 42 +- arch/x86/kvm/vmx/evmcs.h | 13 +- arch/x86/kvm/vmx/nested.c | 44 +- arch/x86/kvm/vmx/vmx.c | 6 +- arch/x86/kvm/x86.c | 18 +- arch/x86/kvm/x86.h | 1 + include/asm-generic/hyperv-tlfs.h | 5 + include/asm-generic/mshyperv.h | 11 +- tools/testing/selftests/kvm/.gitignore | 2 + tools/testing/selftests/kvm/Makefile | 4 +- .../selftests/kvm/include/kvm_util_base.h | 1 + .../selftests/kvm/include/x86_64/evmcs.h | 40 +- .../selftests/kvm/include/x86_64/hyperv.h | 62 ++ .../selftests/kvm/include/x86_64/processor.h | 71 +- .../selftests/kvm/include/x86_64/svm_util.h | 10 + .../selftests/kvm/include/x86_64/vmx.h | 4 + tools/testing/selftests/kvm/lib/kvm_util.c | 7 +- .../testing/selftests/kvm/lib/x86_64/hyperv.c | 21 + .../selftests/kvm/lib/x86_64/processor.c | 3 +- tools/testing/selftests/kvm/lib/x86_64/svm.c | 10 + tools/testing/selftests/kvm/lib/x86_64/vmx.c | 7 + .../testing/selftests/kvm/x86_64/evmcs_test.c | 43 +- .../selftests/kvm/x86_64/hyperv_features.c | 22 +- .../testing/selftests/kvm/x86_64/hyperv_ipi.c | 352 ++++++++++ .../selftests/kvm/x86_64/hyperv_svm_test.c | 54 +- .../selftests/kvm/x86_64/hyperv_tlb_flush.c | 660 ++++++++++++++++++ 38 files changed, 1887 insertions(+), 201 deletions(-) create mode 100644 arch/x86/kvm/svm/hyperv.c create mode 100644 tools/testing/selftests/kvm/lib/x86_64/hyperv.c create mode 100644 tools/testing/selftests/kvm/x86_64/hyperv_ipi.c create mode 100644 tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c -- 2.35.3