From patchwork Tue Jun 6 19:04:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ackerley Tng X-Patchwork-Id: 104064 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:994d:0:b0:3d9:f83d:47d9 with SMTP id k13csp3612440vqr; Tue, 6 Jun 2023 12:09:23 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ5LgI7r5IGFCZuf0rk/GVIhIIb2DttJ1keKibxdvSFqtXg1k1AHbk1HcImKRCC9iE9DzR05 X-Received: by 2002:ac8:57cb:0:b0:3f8:719e:d9d1 with SMTP id w11-20020ac857cb000000b003f8719ed9d1mr818051qta.41.1686078563314; Tue, 06 Jun 2023 12:09:23 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1686078563; cv=none; d=google.com; s=arc-20160816; b=T9IThEUP9MUlieZSggjLBBdKX1GbKxSf4sQEP5/RDNAP9tsI+9TvzEUpELIj9VsD1I Oj6MG5ptlmpKrxqZ+6Eirn2L42xX5YmFhEsdN+Tl7ddP2zFjZxxer6IyXT4hQKfxDQv4 xg+sTgbTf7F0AVsN4TpM9OAfQYMc6cSTWNiSiupzQt0WbU4ZUDoENVvsbLl2xgR0x8/m OaL/6NAvCi9uVEB9dupjJXKVXpVUeFTn/+wlfOzacvgCYzu2nvbhzdMzCpbHFb/V7POr nTDx546VNPXZ6koAKaRKe4eQX68vWAh/FknRq4Eyoq6zaQajEg2yQ+xC993wywPpFD8j 1A/Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:from:subject:message-id:references :mime-version:in-reply-to:date:dkim-signature; bh=o3QY+GjjNY/B/LKbvEsBmmion/NMqJeuEYcwlsx1w+c=; b=HXd10lltlXBakpE28XyKVFExuTYWgPYmyhzemL1vbugnQ3e3wkyyHZNrrjcs2Uy9gL 1CTgi+nzzloA/eUQ3rsZAF7jlQXLmRUmXt2wW1PDRRBeMUggPZUjJYhPV5wvRr+QXRZd Tbf7cPUJv76/tFcByYbY+av0cEDrhMBKeqIIvM7V6EwFlsD4OpYJaVH5icT7auun/rD/ v3NN1xjn+rBHQOpzoj7DSrLpAX9SZoT+V/6dncipzoxmklk4mzV3eTwd4WawcL1wnb44 FMxs9NEylAexEvZbA4K0VT1mRabyZgvNG+/IAFkYKHyHZlUuUlrtEL5PyV8wQJXntmCl PgAQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@google.com header.s=20221208 header.b=ga7yY2wF; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id 22-20020ac85956000000b003f9ac524f27si2115987qtz.690.2023.06.06.12.09.09; Tue, 06 Jun 2023 12:09:23 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20221208 header.b=ga7yY2wF; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239473AbjFFTH6 (ORCPT + 99 others); Tue, 6 Jun 2023 15:07:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239304AbjFFTHA (ORCPT ); Tue, 6 Jun 2023 15:07:00 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2BE7319B0 for ; Tue, 6 Jun 2023 12:05:06 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id 3f1490d57ef6-bb39aebdd87so1887607276.0 for ; Tue, 06 Jun 2023 12:05:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1686078286; x=1688670286; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=o3QY+GjjNY/B/LKbvEsBmmion/NMqJeuEYcwlsx1w+c=; b=ga7yY2wFSjsTCtNYT2NMM1yjmokiEXDaCTuXNhL4QFIjeFOGWXP9m4xRNkNarZKOBt me9uyDk1llgo74NsZn/+85xOGgk1JymFHYuOx2vpupSEs8KBznt7C4GK7pW1At3io3MV omuLB1jzJaLc4Zg0yimBb4CzacnWix8fdVSxMBPt8YeYd8UktVq4LjjSoaTbCwhO+eXy EZa5FIg//RusZW7f2NgtTOFoqGNu6khof2qQQ8vk0r6gz2il2XRm/VN/dp/gxWzndj0K LOfFsFQnLTJrS+CT3R61MXxoPNTsaAUuUv0u7TZgtSvuJTPRds1QGGcjrMoDqzJSrIHy 9Thg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686078286; x=1688670286; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=o3QY+GjjNY/B/LKbvEsBmmion/NMqJeuEYcwlsx1w+c=; b=UMPzMubyaQE81NoVKlSmtkp0iAZeQOmBMYvgqmf362UWJwwC/K3anYq9i1XhscYvyt ym69YZdKCQObln1NUeEmvHqu6Q1bOzZAPx6h88I2/v8s04nREhcCJt9F7m5zLXCN+t9c zeg02DYupn2CRw0fF9Xp01SUpV6Ue3JCPLDpBo+ywT6O164/gWLi6gSvvcjTxdVh1ag7 LNJej11wzR4h50jxDI3J+uAmRQpDjLtdqyOcsdFSQ+NG7o8I5bZ7I9Q/hEqh29vudxKB BlZ/AyCwcBwEVBy2oRfydZrx0m+VZSB/eOCNdytPPbvL+Y3JQ58ANFN4a5SVTZ9RGd5t bsWw== X-Gm-Message-State: AC+VfDxg/GZ8ntmab7rBm0vk763Fibt0mPlneL9oJBAM+8Mx8fCpSzB2 csW2r/fSVA8PBJfZr0AeRBpvvGllpXjK2v0CnA== X-Received: from ackerleytng-ctop.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:13f8]) (user=ackerleytng job=sendgmr) by 2002:a25:aea3:0:b0:bb3:9b99:f3f5 with SMTP id b35-20020a25aea3000000b00bb39b99f3f5mr1433391ybj.4.1686078286504; Tue, 06 Jun 2023 12:04:46 -0700 (PDT) Date: Tue, 6 Jun 2023 19:04:03 +0000 In-Reply-To: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.41.0.rc0.172.g3f132b7071-goog Message-ID: <5f0d27ce06c03761974264bd8a890614ea7ecb32.1686077275.git.ackerleytng@google.com> Subject: [RFC PATCH 18/19] KVM: selftests: Support various types of backing sources for private memory From: Ackerley Tng To: akpm@linux-foundation.org, mike.kravetz@oracle.com, muchun.song@linux.dev, pbonzini@redhat.com, seanjc@google.com, shuah@kernel.org, willy@infradead.org Cc: brauner@kernel.org, chao.p.peng@linux.intel.com, coltonlewis@google.com, david@redhat.com, dhildenb@redhat.com, dmatlack@google.com, erdemaktas@google.com, hughd@google.com, isaku.yamahata@gmail.com, jarkko@kernel.org, jmattson@google.com, joro@8bytes.org, jthoughton@google.com, jun.nakajima@intel.com, kirill.shutemov@linux.intel.com, liam.merwick@oracle.com, mail@maciej.szmigiero.name, mhocko@suse.com, michael.roth@amd.com, qperret@google.com, rientjes@google.com, rppt@kernel.org, steven.price@arm.com, tabba@google.com, vannapurve@google.com, vbabka@suse.cz, vipinsh@google.com, vkuznets@redhat.com, wei.w.wang@intel.com, yu.c.zhang@linux.intel.com, kvm@vger.kernel.org, linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, qemu-devel@nongnu.org, x86@kernel.org, Ackerley Tng X-Spam-Status: No, score=-9.6 required=5.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE,USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1767981515436632137?= X-GMAIL-MSGID: =?utf-8?q?1767981515436632137?= Adds support for various type of backing sources for private memory (in the sense of confidential computing), similar to the backing sources available for shared memory. Signed-off-by: Ackerley Tng --- .../testing/selftests/kvm/include/test_util.h | 14 ++++ tools/testing/selftests/kvm/lib/test_util.c | 74 +++++++++++++++++++ 2 files changed, 88 insertions(+) diff --git a/tools/testing/selftests/kvm/include/test_util.h b/tools/testing/selftests/kvm/include/test_util.h index a6e9f215ce70..899ea15ca8a9 100644 --- a/tools/testing/selftests/kvm/include/test_util.h +++ b/tools/testing/selftests/kvm/include/test_util.h @@ -122,6 +122,16 @@ struct vm_mem_backing_src_alias { uint32_t flag; }; +enum vm_pmem_backing_src_type { + VM_PMEM_SRC_GMEM, + VM_PMEM_SRC_HUGETLB, /* Use kernel default page size for hugetlb pages */ + VM_PMEM_SRC_HUGETLB_2MB, + VM_PMEM_SRC_HUGETLB_1GB, + NUM_PMEM_SRC_TYPES, +}; + +#define DEFAULT_VM_PMEM_SRC VM_PMEM_SRC_GMEM + #define MIN_RUN_DELAY_NS 200000UL bool thp_configured(void); @@ -132,6 +142,10 @@ size_t get_backing_src_pagesz(uint32_t i); bool is_backing_src_hugetlb(uint32_t i); void backing_src_help(const char *flag); enum vm_mem_backing_src_type parse_backing_src_type(const char *type_name); +void pmem_backing_src_help(const char *flag); +enum vm_pmem_backing_src_type parse_pmem_backing_src_type(const char *type_name); +const struct vm_mem_backing_src_alias *vm_pmem_backing_src_alias(uint32_t i); +size_t get_pmem_backing_src_pagesz(uint32_t i); long get_run_delay(void); /* diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c index b772193f6c18..62efb7b8ba51 100644 --- a/tools/testing/selftests/kvm/lib/test_util.c +++ b/tools/testing/selftests/kvm/lib/test_util.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #include @@ -287,6 +288,34 @@ const struct vm_mem_backing_src_alias *vm_mem_backing_src_alias(uint32_t i) return &aliases[i]; } +const struct vm_mem_backing_src_alias *vm_pmem_backing_src_alias(uint32_t i) +{ + static const struct vm_mem_backing_src_alias aliases[] = { + [VM_PMEM_SRC_GMEM] = { + .name = "pmem_gmem", + .flag = 0, + }, + [VM_PMEM_SRC_HUGETLB] = { + .name = "pmem_hugetlb", + .flag = KVM_GUEST_MEMFD_HUGETLB, + }, + [VM_PMEM_SRC_HUGETLB_2MB] = { + .name = "pmem_hugetlb_2mb", + .flag = KVM_GUEST_MEMFD_HUGETLB | KVM_GUEST_MEMFD_HUGE_2MB, + }, + [VM_PMEM_SRC_HUGETLB_1GB] = { + .name = "pmem_hugetlb_1gb", + .flag = KVM_GUEST_MEMFD_HUGETLB | KVM_GUEST_MEMFD_HUGE_1GB, + }, + }; + _Static_assert(ARRAY_SIZE(aliases) == NUM_PMEM_SRC_TYPES, + "Missing new backing private mem src types?"); + + TEST_ASSERT(i < NUM_PMEM_SRC_TYPES, "Private mem backing src type ID %d too big", i); + + return &aliases[i]; +} + #define MAP_HUGE_PAGE_SIZE(x) (1ULL << ((x >> MAP_HUGE_SHIFT) & MAP_HUGE_MASK)) size_t get_backing_src_pagesz(uint32_t i) @@ -307,6 +336,20 @@ size_t get_backing_src_pagesz(uint32_t i) } } +size_t get_pmem_backing_src_pagesz(uint32_t i) +{ + uint32_t flag = vm_pmem_backing_src_alias(i)->flag; + + switch (i) { + case VM_PMEM_SRC_GMEM: + return getpagesize(); + case VM_PMEM_SRC_HUGETLB: + return get_def_hugetlb_pagesz(); + default: + return MAP_HUGE_PAGE_SIZE(flag); + } +} + bool is_backing_src_hugetlb(uint32_t i) { return !!(vm_mem_backing_src_alias(i)->flag & MAP_HUGETLB); @@ -343,6 +386,37 @@ enum vm_mem_backing_src_type parse_backing_src_type(const char *type_name) return -1; } +static void print_available_pmem_backing_src_types(const char *prefix) +{ + int i; + + printf("%sAvailable private mem backing src types:\n", prefix); + + for (i = 0; i < NUM_PMEM_SRC_TYPES; i++) + printf("%s %s\n", prefix, vm_pmem_backing_src_alias(i)->name); +} + +void pmem_backing_src_help(const char *flag) +{ + printf(" %s: specify the type of memory that should be used to\n" + " back guest private memory. (default: %s)\n", + flag, vm_pmem_backing_src_alias(DEFAULT_VM_MEM_SRC)->name); + print_available_pmem_backing_src_types(" "); +} + +enum vm_pmem_backing_src_type parse_pmem_backing_src_type(const char *type_name) +{ + int i; + + for (i = 0; i < NUM_SRC_TYPES; i++) + if (!strcmp(type_name, vm_pmem_backing_src_alias(i)->name)) + return i; + + print_available_pmem_backing_src_types(""); + TEST_FAIL("Unknown private mem backing src type: %s", type_name); + return -1; +} + long get_run_delay(void) { char path[64];