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    SubjectRe: [Patch v2 0/2] cgroup: KVM: New Encryption IDs cgroup controller
    On Tue, Dec 08, 2020 at 01:35:29PM -0800, Vipin Sharma wrote:
    > 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 ASIDs.
    >
    > 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
    >
    > Thanks
    > Vipin Sharma
    >
    > [1] https://lore.kernel.org/lkml/20200922004024.3699923-1-vipinsh@google.com/#r
    >
    > Vipin Sharma (2):
    > cgroup: svm: Add Encryption ID controller
    > cgroup: svm: Encryption IDs cgroup documentation.
    >
    > .../admin-guide/cgroup-v1/encryption_ids.rst | 108 +++++
    > Documentation/admin-guide/cgroup-v2.rst | 78 +++-
    > arch/x86/kvm/svm/sev.c | 28 +-
    > include/linux/cgroup_subsys.h | 4 +
    > include/linux/encryption_ids_cgroup.h | 70 +++
    > include/linux/kvm_host.h | 4 +
    > init/Kconfig | 14 +
    > kernel/cgroup/Makefile | 1 +
    > kernel/cgroup/encryption_ids.c | 430 ++++++++++++++++++
    > 9 files changed, 728 insertions(+), 9 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
    >
    > --
    > 2.29.2.576.ga3fc446d84-goog
    >

    Please ignore this version of patch series, I will send out v3 soon. v2
    has build failure when CONFIG_CGROUP is disabled.

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