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use sbi_spec::binary::{HartMask, SbiRet};
/// Remote Fence support extension.
///
/// The remote fence function acts as a full TLB flush if
/// - `start_addr` and `size` are both 0, or
/// - `size` is equal to `usize::MAX`.
pub trait Rfence {
/// Instructs remote harts to execute `FENCE.I` instruction.
///
/// # Return value
///
/// Returns `SbiRet::success()` when a remote fence was sent to all the targeted harts successfully.
fn remote_fence_i(&self, hart_mask: HartMask) -> SbiRet;
/// Instructs the remote harts to execute one or more `SFENCE.VMA` instructions,
/// covering the range of virtual addresses between `start_addr` and `size`.
///
/// # 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::invalid_address()` | `start_addr` or `size` is not valid.
fn remote_sfence_vma(&self, hart_mask: HartMask, start_addr: usize, size: usize) -> SbiRet;
/// Instruct the remote harts to execute one or more `SFENCE.VMA` instructions,
/// covering the range of virtual addresses between `start_addr` and `size`.
/// This covers only the given address space by `asid`.
///
/// # 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::invalid_address()` | `start_addr` or `size` is not valid.
fn remote_sfence_vma_asid(
&self,
hart_mask: HartMask,
start_addr: usize,
size: usize,
asid: usize,
) -> SbiRet;
/// Instruct the remote harts to execute one or more `HFENCE.GVMA` instructions,
/// covering the range of guest physical addresses between `start_addr` and `size`
/// only for the given virtual machine by `vmid`.
///
/// 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 harts do not support the RISC-V hypervisor extension.
/// | `SbiRet::invalid_address()` | `start_addr` or `size` is not valid.
#[inline]
fn remote_hfence_gvma_vmid(
&self,
hart_mask: HartMask,
start_addr: usize,
size: usize,
vmid: usize,
) -> SbiRet {
let _ = (hart_mask, start_addr, size, vmid);
SbiRet::not_supported()
}
/// Instruct 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 harts do not support the RISC-V hypervisor extension.
/// | `SbiRet::invalid_address()` | `start_addr` or `size` is not valid.
#[inline]
fn remote_hfence_gvma(&self, hart_mask: HartMask, start_addr: usize, size: usize) -> SbiRet {
let _ = (hart_mask, start_addr, size);
SbiRet::not_supported()
}
/// Instruct the remote harts to execute one or more `HFENCE.VVMA` instructions,
/// covering the range of guest virtual addresses between `start_addr` and `size` for the given
/// address space by `asid` and current virtual machine (by `vmid` in `hgatp` CSR)
/// of calling hart.
///
/// 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 harts do not support the RISC-V hypervisor extension.
/// | `SbiRet::invalid_address()` | `start_addr` or `size` is not valid.
#[inline]
fn remote_hfence_vvma_asid(
&self,
hart_mask: HartMask,
start_addr: usize,
size: usize,
asid: usize,
) -> SbiRet {
let _ = (hart_mask, start_addr, size, asid);
SbiRet::not_supported()
}
/// Instruct the remote harts to execute one or more `HFENCE.VVMA` instructions,
/// covering the range of guest virtual addresses between `start_addr` and `size`
/// for current virtual machine (by `vmid` in `hgatp` CSR) of calling hart.
///
/// 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 harts do not support the RISC-V hypervisor extension.
/// | `SbiRet::invalid_address()` | `start_addr` or `size` is not valid.
#[inline]
fn remote_hfence_vvma(&self, hart_mask: HartMask, start_addr: usize, size: usize) -> SbiRet {
let _ = (hart_mask, start_addr, size);
SbiRet::not_supported()
}
/// Function internal to macros. Do not use.
#[doc(hidden)]
#[inline]
fn _rustsbi_probe(&self) -> usize {
sbi_spec::base::UNAVAILABLE_EXTENSION.wrapping_add(1)
}
}
impl<T: Rfence> Rfence for &T {
#[inline]
fn remote_fence_i(&self, hart_mask: HartMask) -> SbiRet {
T::remote_fence_i(self, hart_mask)
}
#[inline]
fn remote_sfence_vma(&self, hart_mask: HartMask, start_addr: usize, size: usize) -> SbiRet {
T::remote_sfence_vma(self, hart_mask, start_addr, size)
}
#[inline]
fn remote_sfence_vma_asid(
&self,
hart_mask: HartMask,
start_addr: usize,
size: usize,
asid: usize,
) -> SbiRet {
T::remote_sfence_vma_asid(self, hart_mask, start_addr, size, asid)
}
#[inline]
fn remote_hfence_gvma_vmid(
&self,
hart_mask: HartMask,
start_addr: usize,
size: usize,
vmid: usize,
) -> SbiRet {
T::remote_hfence_gvma_vmid(self, hart_mask, start_addr, size, vmid)
}
#[inline]
fn remote_hfence_gvma(&self, hart_mask: HartMask, start_addr: usize, size: usize) -> SbiRet {
T::remote_hfence_gvma(self, hart_mask, start_addr, size)
}
#[inline]
fn remote_hfence_vvma_asid(
&self,
hart_mask: HartMask,
start_addr: usize,
size: usize,
asid: usize,
) -> SbiRet {
T::remote_hfence_vvma_asid(self, hart_mask, start_addr, size, asid)
}
#[inline]
fn remote_hfence_vvma(&self, hart_mask: HartMask, start_addr: usize, size: usize) -> SbiRet {
T::remote_hfence_vvma(self, hart_mask, start_addr, size)
}
}
impl<T: Rfence> Rfence for Option<T> {
#[inline]
fn remote_fence_i(&self, hart_mask: HartMask) -> SbiRet {
self.as_ref()
.map(|inner| T::remote_fence_i(inner, hart_mask))
.unwrap_or(SbiRet::not_supported())
}
#[inline]
fn remote_sfence_vma(&self, hart_mask: HartMask, start_addr: usize, size: usize) -> SbiRet {
self.as_ref()
.map(|inner| T::remote_sfence_vma(inner, hart_mask, start_addr, size))
.unwrap_or(SbiRet::not_supported())
}
#[inline]
fn remote_sfence_vma_asid(
&self,
hart_mask: HartMask,
start_addr: usize,
size: usize,
asid: usize,
) -> SbiRet {
self.as_ref()
.map(|inner| T::remote_sfence_vma_asid(inner, hart_mask, start_addr, size, asid))
.unwrap_or(SbiRet::not_supported())
}
#[inline]
fn remote_hfence_gvma_vmid(
&self,
hart_mask: HartMask,
start_addr: usize,
size: usize,
vmid: usize,
) -> SbiRet {
self.as_ref()
.map(|inner| T::remote_hfence_gvma_vmid(inner, hart_mask, start_addr, size, vmid))
.unwrap_or(SbiRet::not_supported())
}
#[inline]
fn remote_hfence_gvma(&self, hart_mask: HartMask, start_addr: usize, size: usize) -> SbiRet {
self.as_ref()
.map(|inner| T::remote_hfence_gvma(inner, hart_mask, start_addr, size))
.unwrap_or(SbiRet::not_supported())
}
#[inline]
fn remote_hfence_vvma_asid(
&self,
hart_mask: HartMask,
start_addr: usize,
size: usize,
asid: usize,
) -> SbiRet {
self.as_ref()
.map(|inner| T::remote_hfence_vvma_asid(inner, hart_mask, start_addr, size, asid))
.unwrap_or(SbiRet::not_supported())
}
#[inline]
fn remote_hfence_vvma(&self, hart_mask: HartMask, start_addr: usize, size: usize) -> SbiRet {
self.as_ref()
.map(|inner| T::remote_hfence_vvma(inner, hart_mask, start_addr, size))
.unwrap_or(SbiRet::not_supported())
}
#[inline]
fn _rustsbi_probe(&self) -> usize {
match self {
Some(_) => sbi_spec::base::UNAVAILABLE_EXTENSION.wrapping_add(1),
None => sbi_spec::base::UNAVAILABLE_EXTENSION,
}
}
}