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@xxxxxxxxxx/#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.
