*** UNIX MANUAL PAGE BROWSER ***

UVM_VSLOCK(9) FreeBSD Kernel Developer's Manual UVM_VSLOCK(9) NAME uvm_vslock, uvm_vsunlock, uvm_vslock_device, uvm_vsunlock_device - wire user memory for I/O SYNOPSIS #include <uvm/uvm_extern.h> void uvm_vslock(struct proc *p, caddr_t addr, size_t len, vm_prot_t access_type); void uvm_vsunlock(struct proc *p, caddr_t addr, size_t len); int uvm_vslock_device(struct proc *p, void *addr, size_t len, vm_prot_t access_type, void **retp); void uvm_vsunlock_device(struct proc *p, void *addr, size_t len, void *map); DESCRIPTION The uvm_vslock() family of functions control the wiring and unwiring of pages for process p from addr to addr + len. The access_type argument is passed to uvm_fault(9). uvm_vslock_device() also checks if the pages are DMA reachable. When they aren't, it bounces their content into a newly created mapping returned in retp. uvm_vsunlock_device() will release this memory mapping pointed by map. SEE ALSO uvm_fault(9) FreeBSD 14.1-RELEASE-p8 December 6, 2019 FreeBSD 14.1-RELEASE-p8