On 03.08.2025 11:47, Penny Zheng wrote: > It can be beneficial for some dom0less systems to further reduce Xen footprint > via disabling some hypercalls handling code, which may not to be used & > required in such systems. Each hypercall has a separate option to keep > configuration flexible. > > Options to disable hypercalls: > - sysctl > - domctl > - hvm > - physdev > - platform > > This patch serie is only focusing on introducing CONFIG_DOMCTL. Different > options will be covered in different patch serie. > > Features, like VM event, or paging log-dirty support, which fully rely on > domctl op, will be wrapped with CONFIG_SYSCTL, to reduce Xen footprint as > much as possible. > > It is derived from Stefano Stabellini's commit "xen: introduce kconfig > options to > disable hypercalls"( > https://lore.kernel.org/xen-devel/20241219092917.3006174-1-sergiy_kib...@epam.com) > > Penny Zheng (25): > xen/x86: move domctl.o out of PV_SHIM_EXCLUSIVE > xen/x86: consolidate vram tracking support > xen/x86: complement PG_log_dirty wrapping > xen: consolidate CONFIG_VM_EVENT > xen: introduce CONFIG_DOMCTL > xen/domctl: provide stub for domctl_lock_{acquire,release} > xen/domctl: wrap around XEN_DOMCTL_pausedomain > xen/domctl: wrap around XEN_DOMCTL_soft_reset > xen/domctl: wrap around XEN_DOMCTL_destroydomain > xen/domctl: wrap around XEN_DOMCTL_setnodeaffinity > xen/domctl: wrap around XEN_DOMCTL_{getvcpuaffinity,setvcpuaffinity} > xen/domctl: wrap around XEN_DOMCTL_scheduler_op > xen/domctl: wrap around XEN_DOMCTL_getvcpucontext > xen/domctl: wrap around XEN_DOMCTL_{irq_permission,iomem_permission} > xen/domctl: wrap around XEN_DOMCTL_settimeoffset > xen/domctl: wrap around XEN_DOMCTL_set_target > xen: add stub for XEN_DOMCTL_getdomaininfo > xen/domctl: wrap around XEN_DOMCTL_set_access_required > xen: make CONFIG_VM_EVENT depend on DOMCTL > xen/domctl: wrap around XEN_DOMCTL_set_virq_handler > xen/domctl: wrap aound iommu-related domctl op > xen/domctl: wrap around XEN_DOMCTL_{get,set}_paging_mempool_size > xen/x86: make CONFIG_X86_PSR depend on SYSCTL || DOMCTL > xen/domctl: wrap around arch-specific domctl op > xen/domctl: wrap around domctl hypercall
Hmm, I should have remembered to Cc you on this [1] reply of mine to Jiqian. It applies here as well. Jan [1] https://lists.xen.org/archives/html/xen-devel/2025-07/msg01884.html
