From patchwork Tue May 24 20:56:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vishal Annapurve X-Patchwork-Id: 12860538 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 7A1ADC433EF for ; Tue, 24 May 2022 20:57:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241773AbiEXU5F (ORCPT ); Tue, 24 May 2022 16:57:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36898 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240084AbiEXU5D (ORCPT ); Tue, 24 May 2022 16:57:03 -0400 Received: from mail-pf1-x44a.google.com (mail-pf1-x44a.google.com [IPv6:2607:f8b0:4864:20::44a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B9FA336150 for ; Tue, 24 May 2022 13:57:01 -0700 (PDT) Received: by mail-pf1-x44a.google.com with SMTP id w83-20020a627b56000000b005182702c297so8204781pfc.0 for ; Tue, 24 May 2022 13:57:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:message-id:mime-version:subject:from:to:cc; bh=HEeApo5ALymfLav8MKuppOv54aHzpbE0xFgatZAbaOI=; b=kv0qmQnmNTU7x7HQl/EE7lkTLtRc9F7QeG5hYPIFCg7DoOswX6ZjqlRK2L5bLUzTJq rmh1u/FAyYQ5xcZubP/gSjXLd8yenwWSBlpAZJli4lAa9w+k4BW57chK/Uu+LH9YXxY6 4yvJsFXJGxImE+cVVw4Fv5bqJsG9jFidqO/vrVqJ4sDfq2LIqV6ZL2tnO5rzLuaHlTj5 falYT0h/ngENNnyBIVR/7sxuZ7J61o/ZArK50y3skVrHvoie/eABFdeINJaL3D3/wHOM 5Y9ImSCkPczalysMqTzu8/WFixWASQnWYfvYaG7CJD2fJ2xaw3HJ5L9Has/SeubJpj/z B5AQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=HEeApo5ALymfLav8MKuppOv54aHzpbE0xFgatZAbaOI=; b=iWe62WeAwFFbwH6oqW5UaBRC+d2K7RBxHvDZt3PM2FYNAto7GDm8tCa5ILSTR9jSsr 2tQbg24M+vaU9kw5swdZwrA+RVYfc8rnzWInCPQqkaxzYaXEq9ck/2MPX8vMj5c17qdo 02LuraZCT4471QVPS9Aojp0RZkzEZxAuu/fiEACgzvcrCzA2gmBzOq1R9Y1H9wmPZ2gE Nul88N4w+2yc9yX2JaT4dSCgyRrKayZgy/nvA228sqVBbbh6lDByuUZoobkfbZbLIjgm dQzdWH7u3fxZ83d+eSzACNzqbiz9vjW2cX0ZllAvBQgo/POk8pxh4rbs4+68HGTZyXcR VsnA== X-Gm-Message-State: AOAM533RL6XyG0fc68ZgYWrW4Rn2+ztSidNts14zMzUOFU75OaFTRvLi dAzQpuXdk96H+qkaNWwjlmh5DGo3FkRWVIif X-Google-Smtp-Source: ABdhPJxKXNWcvGU5h6fKtyB706UOewsJBMI8Pe35pY7Gpw9/aokAZ/4NW4rSKrVFi8BYUTcmnEz+3j7wQJk+8GxY X-Received: from vannapurve2.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:41f8]) (user=vannapurve job=sendgmr) by 2002:a05:6a00:1acb:b0:518:986c:a7c4 with SMTP id f11-20020a056a001acb00b00518986ca7c4mr13256588pfv.2.1653425821110; Tue, 24 May 2022 13:57:01 -0700 (PDT) Date: Tue, 24 May 2022 20:56:43 +0000 Message-Id: <20220524205646.1798325-1-vannapurve@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.36.1.124.g0e6072fb45-goog Subject: [RFC V1 PATCH 0/3] selftests: KVM: sev: selftests for fd-based approach of supporting 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 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org This series implements selftests targeting the feature floated by Chao via: https://lore.kernel.org/linux-mm/20220519153713.819591-1-chao.p.peng@linux.intel.com/ Below changes aim to test the fd based approach for guest private memory in context of SEV/SEV-ES VMs executing on AMD SEV/SEV-ES compatible platforms. This series has dependency on following patch series: 1) V6 series patches from Chao mentioned above. 2) https://lore.kernel.org/all/20211210164620.11636-1-michael.roth@amd.com/T/ - KVM: selftests: Add support for test-selectable ucall implementations series by Michael Roth 3) https://lore.kernel.org/kvm/20220104234129.dvpv3o3tihvzsqcr@amd.com/T/ - KVM: selftests: Add tests for SEV and SEV-ES guests series by Michael Roth And few additional patches: * https://github.com/vishals4gh/linux/commit/2cb215cb6b4dff7fdf703498165179626c0cdfc7 - Confidential platforms along with the confidentiality aware software stack support a notion of private/shared accesses from the confidential VMs. Generally, a bit in the GPA conveys the shared/private-ness of the access. SEV/SEV-ES implementation doesn't expose the encryption bit information via fault address to KVM and so this hack is still needed to signal private/shared access ranges to the kvm. * https://github.com/vishals4gh/linux/commit/81a7d24231f6b8fb4174bbf97ed733688e8dbc0c Github link for the patches posted as part of this series: https://github.com/vishals4gh/linux/commits/sev_upm_selftests_rfc_v1 sev_priv_memfd_test.c file adds a suite of selftests to access private memory from the SEV/SEV-ES guests via private/shared accesses and checking if the contents can be leaked to/accessed by vmm via shared memory view. To allow SEV/SEV-ES VMs to toggle the encryption bit during memory conversion, support is added for mapping guest pagetables to guest va ranges and passing the mapping information to guests via shared pages. Vishal Annapurve (3): selftests: kvm: x86_64: Add support for pagetable tracking selftests: kvm: sev: Handle hypercall exit selftests: kvm: sev: Port UPM selftests onto SEV/SEV-ES VMs tools/testing/selftests/kvm/.gitignore | 1 + tools/testing/selftests/kvm/Makefile | 1 + .../selftests/kvm/include/kvm_util_base.h | 98 ++ tools/testing/selftests/kvm/lib/kvm_util.c | 81 +- .../selftests/kvm/lib/kvm_util_internal.h | 9 + .../selftests/kvm/lib/x86_64/processor.c | 36 + .../selftests/kvm/lib/x86_64/sev_exitlib.c | 39 +- .../kvm/x86_64/sev_priv_memfd_test.c | 1511 +++++++++++++++++ 8 files changed, 1770 insertions(+), 6 deletions(-) create mode 100644 tools/testing/selftests/kvm/x86_64/sev_priv_memfd_test.c