From patchwork Tue Nov 1 14:54:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Kuznetsov X-Patchwork-Id: 13027067 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 A1616C43217 for ; Tue, 1 Nov 2022 15:01:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231401AbiKAPBk (ORCPT ); Tue, 1 Nov 2022 11:01:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41654 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230493AbiKAPBP (ORCPT ); Tue, 1 Nov 2022 11:01:15 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 148571DDF4 for ; Tue, 1 Nov 2022 07:56:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1667314604; 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: in-reply-to:in-reply-to:references:references; bh=iVYjUYFhl/qhwDL5l7si59w32fV51OGyzGqIljVaKlo=; b=dF9U2p/hlaxCCk32fHJ5RG8+RkHmdLGgMhHzbr613a9AH+zT0P75MhuiWdTsL+BoLl6BKm qLcAwhPmIUe459RmmfRqKgTzl+ynfreBa0DJQHNvX7tQIpELL4tf3UMQrmIA2QpmLyDIYZ qoRQGJ2xxGQsrjvhSfdo8vAvr6xhJRo= 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-459-z9Zwk__qMQ6qgnSmA2LD7w-1; Tue, 01 Nov 2022 10:56:40 -0400 X-MC-Unique: z9Zwk__qMQ6qgnSmA2LD7w-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 2C83B1C00504; Tue, 1 Nov 2022 14:56:34 +0000 (UTC) Received: from ovpn-194-149.brq.redhat.com (ovpn-194-149.brq.redhat.com [10.40.194.149]) by smtp.corp.redhat.com (Postfix) with ESMTP id 22DEEC2DF60; Tue, 1 Nov 2022 14:56:17 +0000 (UTC) From: Vitaly Kuznetsov To: kvm@vger.kernel.org, Paolo Bonzini , Sean Christopherson Cc: Wanpeng Li , Jim Mattson , Michael Kelley , Siddharth Chandrasekaran , Yuan Yao , Maxim Levitsky , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v13 36/48] KVM: selftests: Drop helpers to read/write page table entries Date: Tue, 1 Nov 2022 15:54:14 +0100 Message-Id: <20221101145426.251680-37-vkuznets@redhat.com> In-Reply-To: <20221101145426.251680-1-vkuznets@redhat.com> References: <20221101145426.251680-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.8 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Sean Christopherson Drop vm_{g,s}et_page_table_entry() and instead expose the "inner" helper (was _vm_get_page_table_entry()) that returns a _pointer_ to the PTE, i.e. let tests directly modify PTEs instead of bouncing through helpers that just make life difficult. Opportunsitically use BIT_ULL() in emulator_error_test, and use the MAXPHYADDR define to set the "rogue" GPA bit instead of open coding the same value. No functional change intended. Signed-off-by: Sean Christopherson Signed-off-by: Vitaly Kuznetsov --- .../selftests/kvm/include/x86_64/processor.h | 6 ++---- .../selftests/kvm/lib/x86_64/processor.c | 21 ++----------------- .../kvm/x86_64/emulator_error_test.c | 6 ++++-- 3 files changed, 8 insertions(+), 25 deletions(-) diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h index dbd75717dc3b..f21d933a2663 100644 --- a/tools/testing/selftests/kvm/include/x86_64/processor.h +++ b/tools/testing/selftests/kvm/include/x86_64/processor.h @@ -829,10 +829,8 @@ static inline uint8_t wrmsr_safe(uint32_t msr, uint64_t val) bool kvm_is_tdp_enabled(void); -uint64_t vm_get_page_table_entry(struct kvm_vm *vm, struct kvm_vcpu *vcpu, - uint64_t vaddr); -void vm_set_page_table_entry(struct kvm_vm *vm, struct kvm_vcpu *vcpu, - uint64_t vaddr, uint64_t pte); +uint64_t *vm_get_page_table_entry(struct kvm_vm *vm, struct kvm_vcpu *vcpu, + uint64_t vaddr); uint64_t kvm_hypercall(uint64_t nr, uint64_t a0, uint64_t a1, uint64_t a2, uint64_t a3); diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c index 39c4409ef56a..90b35998b0f3 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -241,9 +241,8 @@ void virt_map_level(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, } } -static uint64_t *_vm_get_page_table_entry(struct kvm_vm *vm, - struct kvm_vcpu *vcpu, - uint64_t vaddr) +uint64_t *vm_get_page_table_entry(struct kvm_vm *vm, struct kvm_vcpu *vcpu, + uint64_t vaddr) { uint16_t index[4]; uint64_t *pml4e, *pdpe, *pde; @@ -313,22 +312,6 @@ static uint64_t *_vm_get_page_table_entry(struct kvm_vm *vm, return &pte[index[0]]; } -uint64_t vm_get_page_table_entry(struct kvm_vm *vm, struct kvm_vcpu *vcpu, - uint64_t vaddr) -{ - uint64_t *pte = _vm_get_page_table_entry(vm, vcpu, vaddr); - - return *(uint64_t *)pte; -} - -void vm_set_page_table_entry(struct kvm_vm *vm, struct kvm_vcpu *vcpu, - uint64_t vaddr, uint64_t pte) -{ - uint64_t *new_pte = _vm_get_page_table_entry(vm, vcpu, vaddr); - - *(uint64_t *)new_pte = pte; -} - void virt_arch_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent) { uint64_t *pml4e, *pml4e_start; diff --git a/tools/testing/selftests/kvm/x86_64/emulator_error_test.c b/tools/testing/selftests/kvm/x86_64/emulator_error_test.c index 236e11755ba6..bde247f3c8a1 100644 --- a/tools/testing/selftests/kvm/x86_64/emulator_error_test.c +++ b/tools/testing/selftests/kvm/x86_64/emulator_error_test.c @@ -152,8 +152,9 @@ int main(int argc, char *argv[]) { struct kvm_vcpu *vcpu; struct kvm_vm *vm; - uint64_t gpa, pte; + uint64_t *pte; uint64_t *hva; + uint64_t gpa; int rc; /* Tell stdout not to buffer its content */ @@ -178,8 +179,9 @@ int main(int argc, char *argv[]) virt_map(vm, MEM_REGION_GVA, MEM_REGION_GPA, 1); hva = addr_gpa2hva(vm, MEM_REGION_GPA); memset(hva, 0, PAGE_SIZE); + pte = vm_get_page_table_entry(vm, vcpu, MEM_REGION_GVA); - vm_set_page_table_entry(vm, vcpu, MEM_REGION_GVA, pte | (1ull << 36)); + *pte |= BIT_ULL(MAXPHYADDR); vcpu_run(vcpu); process_exit_on_emulation_error(vcpu);