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 8792BC32773 for ; Fri, 19 Aug 2022 18:01:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349813AbiHSSBC (ORCPT ); Fri, 19 Aug 2022 14:01:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52654 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350823AbiHSSA1 (ORCPT ); Fri, 19 Aug 2022 14:00:27 -0400 Received: from mail-yw1-x114a.google.com (mail-yw1-x114a.google.com [IPv6:2607:f8b0:4864:20::114a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 245A7108F14 for ; Fri, 19 Aug 2022 10:47:23 -0700 (PDT) Received: by mail-yw1-x114a.google.com with SMTP id 00721157ae682-3360c0f0583so87502607b3.2 for ; Fri, 19 Aug 2022 10:47:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:mime-version:message-id:date:from:to:cc; bh=68jCmlJPTWjEgDH8dkKvsN/Vy+R3D5xwsjHMw72NqNI=; b=NM4HyjtIBQ7etrlOFPYIvVk5AscNC7t026h95x4fzfrTKG/0tt7n8peKjYT7elXEKv 5BSLtW4bMFgrN6ymudRaSc7o4eyszTLMILhkqSMcAqk71Belo4theQvOvFbAcyBdR8mT Y4QMGBFg2QZjPAMu4HURM9fZg+m22w7PyufoX4YXFtboyXUAJdt/ZV6gs285xyx7Iike tRhpzNBUbMUhjBe3WxyNncJ8Cs5trM/tdh/JmemktXFM6HyhKPNUeUbtacvl39ZlCxvi kXY9fTvnMgGaNeXrmCP5Z0gVeTtDXo8zc32GSnUCNmN2PrGd8kbdZhvTHmfWN1cMv30n VbMA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:mime-version:message-id:date:x-gm-message-state :from:to:cc; bh=68jCmlJPTWjEgDH8dkKvsN/Vy+R3D5xwsjHMw72NqNI=; b=U8xwq7DeNn6rYzE/YLg2GYyDCp/mU0pwQ7mXTtnUQgYQMC3ko+yOpcE+DE9y61q04g BEtJ4uPoJyOjEfu2Vy9DWLpQe4xAjMlANN0YF8nz2zDtlSE3qGxOgY1K1k+34fPC6epE /EqvMdgpiH/gSekP5iVKRj4OgzgKCDW+NZFAKdk5EkHwI97aCH7eeK+3Zwhs1P3U9kuY xqokKoW7Ip02C1kcA3HQZfpaDtcePYzYvzdKerPdCgWehBY25TXrPH7t5FIyy+6nM1jp yqQcd7PazEvARhFnEBaflPmoT00DBX3UDHsCC9K0gmSYEsdF9DY+1L3/0uxU1G3UAXVq bQBA== X-Gm-Message-State: ACgBeo1qWeuL8a+ObNTym+zSvCBPAI0vfFIYbpt+9Rs/QIpp8MPzdbFC 1pVvcLlxbVqq8yii+IY+H6V6FhILoeyQNCTh X-Google-Smtp-Source: AA6agR6DIUG9NXvjt9p2KBgUlc6EhGutVC6loa8Jf8FHQddKVVlyc1IRm//fxEaRXHCuyKWYVdFq1MWl3jfvMPqb X-Received: from vannapurve2.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:41f8]) (user=vannapurve job=sendgmr) by 2002:a25:bd3:0:b0:691:d47a:be78 with SMTP id 202-20020a250bd3000000b00691d47abe78mr8120620ybl.574.1660931242410; Fri, 19 Aug 2022 10:47:22 -0700 (PDT) Date: Fri, 19 Aug 2022 17:46:53 +0000 Message-Id: <20220819174659.2427983-1-vannapurve@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.37.1.595.g718a3a8f04-goog Subject: [RFC V3 PATCH 0/6] selftests: KVM: selftests for fd-based private memory From: Vishal Annapurve To: x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: pbonzini@redhat.com, vkuznets@redhat.com, wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, shuah@kernel.org, yang.zhong@intel.com, drjones@redhat.com, ricarkol@google.com, aaronlewis@google.com, wei.w.wang@intel.com, kirill.shutemov@linux.intel.com, corbet@lwn.net, hughd@google.com, jlayton@kernel.org, bfields@fieldses.org, akpm@linux-foundation.org, chao.p.peng@linux.intel.com, yu.c.zhang@linux.intel.com, jun.nakajima@intel.com, dave.hansen@intel.com, michael.roth@amd.com, qperret@google.com, steven.price@arm.com, ak@linux.intel.com, david@redhat.com, luto@kernel.org, vbabka@suse.cz, marcorr@google.com, erdemaktas@google.com, pgonda@google.com, nikunj@amd.com, seanjc@google.com, diviness@google.com, maz@kernel.org, dmatlack@google.com, axelrasmussen@google.com, maciej.szmigiero@oracle.com, mizhang@google.com, bgardon@google.com, Vishal Annapurve Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This v3 series implements selftests targeting the feature floated by Chao via: https://lore.kernel.org/linux-mm/20220706082016.2603916-12-chao.p.peng@linux.intel.com/T/ Below changes aim to test the fd based approach for guest private memory in context of normal (non-confidential) VMs executing on non-confidential platforms. private_mem_test.c file adds selftest to access private memory from the guest via private/shared accesses and checking if the contents can be leaked to/accessed by vmm via shared memory view before/after conversions. Updates in V3: 1) Series is based on v7 series from Chao 2) Changes are introduced in KVM to help execute private mem selftests 3) Selftests are executing from private memory 4) Test implementation is simplified to contain implicit/explicit memory conversion paths according to feedback from Sean. 5) Addressed comments from Sean and Shuah. This series has dependency on following patches: 1) V7 series patches from Chao mentioned above. 2) https://lore.kernel.org/lkml/20220810152033.946942-1-pgonda@google.com/T/#u - Series posted by Peter containing patches from Michael and Sean. Github link for the patches posted as part of this series: https://github.com/vishals4gh/linux/commits/priv_memfd_selftests_rfc_v3 Vishal Annapurve (6): kvm: x86: Add support for testing private memory selftests: kvm: Add support for private memory selftests: kvm: ucall: Allow querying ucall pool gpa selftests: kvm: x86: Execute hypercall as per the cpu selftests: kvm: x86: Execute VMs with private memory sefltests: kvm: x86: Add selftest for private memory arch/x86/include/uapi/asm/kvm_para.h | 2 + arch/x86/kvm/Kconfig | 1 + arch/x86/kvm/mmu/mmu.c | 19 ++ arch/x86/kvm/mmu/mmu_internal.h | 2 +- arch/x86/kvm/x86.c | 67 +++- include/linux/kvm_host.h | 12 + tools/testing/selftests/kvm/.gitignore | 1 + tools/testing/selftests/kvm/Makefile | 2 + .../selftests/kvm/include/kvm_util_base.h | 12 +- .../selftests/kvm/include/ucall_common.h | 2 + .../kvm/include/x86_64/private_mem.h | 51 +++ tools/testing/selftests/kvm/lib/kvm_util.c | 40 ++- .../testing/selftests/kvm/lib/ucall_common.c | 12 + .../selftests/kvm/lib/x86_64/private_mem.c | 297 ++++++++++++++++++ .../selftests/kvm/lib/x86_64/processor.c | 15 +- .../selftests/kvm/x86_64/private_mem_test.c | 262 +++++++++++++++ virt/kvm/Kconfig | 9 + virt/kvm/kvm_main.c | 90 +++++- 18 files changed, 887 insertions(+), 9 deletions(-) create mode 100644 tools/testing/selftests/kvm/include/x86_64/private_mem.h create mode 100644 tools/testing/selftests/kvm/lib/x86_64/private_mem.c create mode 100644 tools/testing/selftests/kvm/x86_64/private_mem_test.c -- 2.37.1.595.g718a3a8f04-goog