On 4/3/2024 12:36 AM, Sean Christopherson wrote: > We are planning on submitting a CFP to host a second annual KVM Microconference > at Linux Plumbers Conference 2024 (https://lpc.events/event/18). To help make > our submission as strong as possible, please respond if you will likely attend, > and/or have a potential topic that you would like to include in the proposal. > The tentative submission is below. > > Note! This is extremely time sensitive, as the deadline for submitting is > April 4th (yeah, we completely missed the initial announcement). > > Sorry for the super short notice. :-( > > P.S. The Cc list is very ad hoc, please forward at will. > > =================== > KVM Microconference > =================== > > KVM (Kernel-based Virtual Machine) enables the use of hardware features to > improve the efficiency, performance, and security of virtual machines (VMs) > created and managed by userspace. KVM was originally developed to accelerate > VMs running a traditional kernel and operating system, in a world where the > host kernel and userspace are part of the VM's trusted computing base (TCB). > > KVM has long since expanded to cover a wide (and growing) array of use cases, > e.g. sandboxing untrusted workloads, deprivileging third party code, reducing > the TCB of security sensitive workloads, etc. The expectations placed on KVM > have also matured accordingly, e.g. functionality that once was "good enough" > no longer meets the needs and demands of KVM users. > > The KVM Microconference will focus on how to evolve KVM and adjacent subsystems > in order to satisfy new and upcoming requirements. Of particular interest is > extending and enhancing guest_memfd, a guest-first memory API that was heavily > discussed at the 2023 KVM Microconference, and merged in v6.8. > > Potential Topics: > - Removing guest memory from the host kernel's direct map[1] > - Mapping guest_memfd into host userspace[2] > - Hugepage support for guest_memfd[3] > - Eliminating "struct page" for guest_memfd > - Passthrough/mediated PMU virtualization[4] > - Pagetable-based Virtual Machine (PVM)[5] > - Optimizing/hardening KVM usage of GUP[6][7] > - Defining KVM requirements for hardware vendors > - Utilizing "fault" injection to increase test coverage of edge cases > > [1] https://lore.kernel.org/all/cc1bb8e9bc3e1ab637700a4d3defeec95b55060a.camel@xxxxxxxxxx > [2] https://lore.kernel.org/all/20240222161047.402609-1-tabba@xxxxxxxxxx > [3] https://lore.kernel.org/all/CABgObfa=DH7FySBviF63OS9sVog_wt-AqYgtUAGKqnY5Bizivw@xxxxxxxxxxxxxx > [4] https://lore.kernel.org/all/20240126085444.324918-1-xiong.y.zhang@xxxxxxxxxxxxxxx > [5] https://lore.kernel.org/all/20240226143630.33643-1-jiangshanlai@xxxxxxxxx > [6] https://lore.kernel.org/all/CABgObfZCay5-zaZd9mCYGMeS106L055CxsdOWWvRTUk2TPYycg@xxxxxxxxxxxxxx > [7] https://lore.kernel.org/all/20240320005024.3216282-1-seanjc@xxxxxxxxxx Passthrough PMU lays the foundation for enabling some current and upcoming PMU virtualization features on AMD processors. Manali and I have been working on them and would like to participate in the discussion. - Sandipan
