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 X-Spam-Level: X-Spam-Status: No, score=-21.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A8452C433DB for ; Sat, 16 Jan 2021 02:33:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 79E02238D6 for ; Sat, 16 Jan 2021 02:33:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726720AbhAPCcz (ORCPT ); Fri, 15 Jan 2021 21:32:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50588 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725781AbhAPCcz (ORCPT ); Fri, 15 Jan 2021 21:32:55 -0500 Received: from mail-qv1-xf4a.google.com (mail-qv1-xf4a.google.com [IPv6:2607:f8b0:4864:20::f4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A1807C061793 for ; Fri, 15 Jan 2021 18:32:14 -0800 (PST) Received: by mail-qv1-xf4a.google.com with SMTP id l7so9569899qvp.15 for ; Fri, 15 Jan 2021 18:32:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:message-id:mime-version:subject:from:to:cc; bh=bK7/dTmSR86C29WgdGxGU8MYCwIuJFaDUK2eSVHNrX4=; b=sxCHu/OuwVoHklKKuzYAF3YsaoWE9hexH3rykqnuF4Wa1pLx0+47yDulZFXTH0z6UR lN1cYFqW2c25FiOwJmS3zmeJkpRkqtUGZdl8y6vtKIEBU8+r9EhEZ2rRX84KdZH/x8l1 sLMnYBccUlFvPDG/uqbFCIPzXC+bBTmbJHP3EZfwKpedZs1BPJJ0GqFSKc560A0bgH/T 7TiDfF625MkvdOAtu394qMmd1073/f9aGb+zxUt394QKEwpQy7hJYWYGBZy9k5J0ADkx tSP8iSsMYb9yV/NoQbVJg/7K9WCO111I+F0VjQhCpQgiqf3lZwr9omaJnGgSme+njipm xdnA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:message-id:mime-version:subject:from :to:cc; bh=bK7/dTmSR86C29WgdGxGU8MYCwIuJFaDUK2eSVHNrX4=; b=CoU/Ip/sknkFNzRFla9nCkZIgEoVWOqPpXK9jBGkzTP7FsESidspFUdqH/gbqfwgQj pDK0cl7rYJqp3KU4WmCs8yTtX6dpWhgmhJreN4zjjyiVwp7O/SQvdmF8LYBpQK8NEYCC 59g+SEIrKtX7PovvY/h3dyNQVlFI0nrqnRT/ZO7QL43mo3l4cfen2feiXOfGkm+d/PSh LufVRBbwAb0Lxj20nqhgnP4+kPaUcsVqG0aMnguc80kggBA6V9agAh1rC208BBLKDltm rdu0WbgVbMxPtYXPRpSgFx3dCYZpLHmifjv8eV70Gx/WQxTO0a/9saNHemT8X2iTGgDb Pjyw== X-Gm-Message-State: AOAM531CNGkpK5lMCQjOECpDHlN/uyu9MxwWoxuqJf9ORLLnoko2eEPs Odmq0Mo61DCuITIeVezs7/ii5ZK16xQw X-Google-Smtp-Source: ABdhPJx8zg6GHMhhgyZyzbY0pMKP05X/oObg4+gTaSfWzbBiuE54CPTESrNjdV7FtuFvVuyrM+3U2lobDBxW Sender: "vipinsh via sendgmr" X-Received: from vipinsh.kir.corp.google.com ([2620:0:1008:10:1ea0:b8ff:fe75:b885]) (user=vipinsh job=sendgmr) by 2002:a0c:fe47:: with SMTP id u7mr15197077qvs.4.1610764333565; Fri, 15 Jan 2021 18:32:13 -0800 (PST) Date: Fri, 15 Jan 2021 18:32:02 -0800 Message-Id: <20210116023204.670834-1-vipinsh@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.30.0.284.gd98b1dd5eaa7-goog Subject: [Patch v5 0/2] cgroup: KVM: New Encryption IDs cgroup controller From: Vipin Sharma To: thomas.lendacky@amd.com, brijesh.singh@amd.com, jon.grimm@amd.com, eric.vantassell@amd.com, pbonzini@redhat.com, seanjc@google.com, tj@kernel.org, hannes@cmpxchg.org, frankja@linux.ibm.com, borntraeger@de.ibm.com, corbet@lwn.net Cc: joro@8bytes.org, vkuznets@redhat.com, wanpengli@tencent.com, jmattson@google.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, gingell@google.com, rientjes@google.com, dionnaglaze@google.com, kvm@vger.kernel.org, x86@kernel.org, cgroups@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Vipin Sharma Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, This patch adds a new cgroup controller, Encryption IDs, to track and limit the usage of encryption IDs on a host. AMD provides Secure Encrypted Virtualization (SEV) and SEV with Encrypted State (SEV-ES) to encrypt the guest OS's memory using limited number of Address Space Identifiers (ASIDs). This limited number of ASIDs creates issues like SEV ASID starvation and unoptimized scheduling in the cloud infrastucture. In the RFC patch v1, I provided only SEV cgroup controller but based on the feedback and discussion it became clear that this cgroup controller can be extended to be used by Intel's Trusted Domain Extension (TDX) and s390's protected virtualization Secure Execution IDs (SEID) This patch series provides a generic Encryption IDs controller with tracking support of the SEV and SEV-ES ASIDs. Changes in v5: - Changed controller filenames from encryption_ids.*.* to encids.*.* - Documentation of cgroup v1 now points to cgroup v2. Changes in v4: - The max value can be set lower than the current. - Added SEV-ES support. Changes in v3: - Fixes a build error when CONFIG_CGROUP is disabled. Changes in v2: - Changed cgroup name from sev to encryption_ids. - Replaced SEV specific names in APIs and documentations with generic encryption IDs. - Providing 3 cgroup files per encryption ID type. For example in SEV, - encryption_ids.sev.stat (only in the root cgroup directory). - encryption_ids.sev.max - encryption_ids.sev.current [1] https://lore.kernel.org/lkml/20200922004024.3699923-1-vipinsh@google.com/ [2] https://lore.kernel.org/lkml/20201208213531.2626955-1-vipinsh@google.com/ [3] https://lore.kernel.org/lkml/20201209205413.3391139-1-vipinsh@google.com/ [4] https://lore.kernel.org/lkml/20210108012846.4134815-1-vipinsh@google.com/ Vipin Sharma (2): cgroup: svm: Add Encryption ID controller cgroup: svm: Encryption IDs cgroup documentation. .../admin-guide/cgroup-v1/encryption_ids.rst | 1 + Documentation/admin-guide/cgroup-v2.rst | 78 +++- arch/x86/kvm/svm/sev.c | 52 ++- include/linux/cgroup_subsys.h | 4 + include/linux/encryption_ids_cgroup.h | 72 +++ include/linux/kvm_host.h | 4 + init/Kconfig | 14 + kernel/cgroup/Makefile | 1 + kernel/cgroup/encryption_ids.c | 421 ++++++++++++++++++ 9 files changed, 633 insertions(+), 14 deletions(-) create mode 100644 Documentation/admin-guide/cgroup-v1/encryption_ids.rst create mode 100644 include/linux/encryption_ids_cgroup.h create mode 100644 kernel/cgroup/encryption_ids.c -- 2.30.0.284.gd98b1dd5eaa7-goog