On Mon, Apr 28, 2025 at 09:31:31PM +0700, Bagas Sanjaya wrote: > On Fri, Apr 25, 2025 at 10:58:10PM -0700, Nicolin Chen wrote: > > +- IOMMUFD_OBJ_VCMDQ, representing a hardware queue as a subset of a vIOMMU's > > + virtualization feature for a VM to directly execute guest-issued commands to > > + invalidate HW cache entries holding the mappings or translations of a guest- > > + owned stage-1 page table. Along with this queue object, iommufd provides the > > + user space an mmap interface for VMM to mmap a physical MMIO region from the > > + host physical address space to a guest physical address space, to exclusively > > + control the allocated vCMDQ HW. Thus, when allocating a vCMDQ, the VMM must > > + request a pair of VMA info (vm_pgoff/size) for a later mmap call. The length > > + argument of an mmap call could be smaller than the given size for a paritial > > + mmap, but the given vm_pgoff (as the addr argument of the mmap call) should > "... partial mmap, ..." Fixed. Thanks! Nicolin
