# Function sfence_vma

Source

    pub unsafe fn sfence_vma(vaddr: usize, asid: usize)

🔬This is a nightly-only experimental API. (`riscv_ext_intrinsics` #114544)
Available on RISC-V RV32 only.
Expand description

Supervisor memory management fence for given virtual address and address space

The fence orders only reads and writes made to leaf page table entries corresponding to the virtual address in parameter `vaddr`, for the address space identified by integer parameter `asid`. Accesses to global mappings are not ordered. The fence also invalidates all address-translation cache entries that contain leaf page table entries corresponding to the virtual address in parameter `vaddr` and that match the address space identified by integer parameter `asid`, except for entries containing global mappings.