Function sbi_rt::remote_hfence_gvma

source ·

pub fn remote_hfence_gvma(
    hart_mask: HartMask,
    start_addr: usize,
    size: usize
) -> SbiRet

Expand description

Execute HFENCE.GVMA instructions for all virtual machines on remote harts.

This function instructs the remote harts to execute one or more HFENCE.GVMA instructions, covering the range of guest physical addresses between start_addr and size for all the guests.

This function call is only valid on harts implementing the RISC-V hypervisor extension.

§Return value

The possible return error codes returned in SbiRet.error are shown in the table below:

Return code	Description
`SbiRet::success()`	A remote fence was sent to all the targeted harts successfully.
`SbiRet::not_supported()`	This function is not supported as it is not implemented or one of the target hart does not support hypervisor extension.
`SbiRet::invalid_address()`	`start_addr` or `size` is not valid.

This function is defined in RISC-V SBI Specification chapter 8.5.