Hi Viresh,
On Tue, Oct 17, 2023 at 01:33:23PM +0530, Viresh Kumar wrote:
This adds support to issue the set ioeventfd ioctl via the privcmd file.
Signed-off-by: Viresh Kumar viresh.kumar@linaro.org
crates/xen-ioctls/Cargo.toml | 1 + crates/xen-ioctls/src/private.rs | 15 +++++- crates/xen-ioctls/src/xdm/types.rs | 18 +++++++ crates/xen-ioctls/src/xdm/xdm.rs | 82 ++++++++++++++++++++++++++++++ 4 files changed, 115 insertions(+), 1 deletion(-)
diff --git a/crates/xen-ioctls/Cargo.toml b/crates/xen-ioctls/Cargo.toml index a9e26f9fe0e0..bc4d21e5847b 100644 --- a/crates/xen-ioctls/Cargo.toml +++ b/crates/xen-ioctls/Cargo.toml @@ -11,3 +11,4 @@ edition = "2018" [dependencies] libc = ">=0.2.95" vmm-sys-util = ">=0.9.0" +xen-bindings = { path = "../xen-bindings" } diff --git a/crates/xen-ioctls/src/private.rs b/crates/xen-ioctls/src/private.rs index 50833e750f2d..13cb3fc8c669 100644 --- a/crates/xen-ioctls/src/private.rs +++ b/crates/xen-ioctls/src/private.rs @@ -14,7 +14,9 @@ use std::io::Error; use std::os::unix::io::AsRawFd; use vmm_sys_util::ioctl::{_IOC_NONE, _IOC_WRITE}; -use crate::xdm::types::{PrivcmdDeviceModelIrqFd, PrivcmdDeviceModelOp}; +use crate::xdm::types::{
- PrivcmdDeviceModelIoeventFd, PrivcmdDeviceModelIrqFd, PrivcmdDeviceModelOp,
+}; use crate::xfm::types::{PrivCmdMmapBatchV2, PrivCmdMmapResource}; pub const PAGE_SHIFT: u32 = 12; @@ -84,6 +86,17 @@ ioctl_ioc_nr!( std::mem::size_of::<PrivcmdDeviceModelIrqFd>() as u32 ); +/*
- #define IOCTL_PRIVCMD_IOEVENTFD _IOW('P', 9, privcmd_ioeventfd_t)
- */
+ioctl_ioc_nr!(
- IOCTL_PRIVCMD_IOEVENTFD,
- _IOC_WRITE,
- XEN_PRIVCMD_TYPE,
- 9 as u32,
- std::mem::size_of::<PrivcmdDeviceModelIoeventFd>() as u32
+);
pub const HYPERCALL_EVTCHN: &str = "/dev/xen/evtchn"; pub const HYPERCALL_PRIVCMD: &str = "/dev/xen/privcmd"; pub const HYPERCALL_BUFFER_FILE: &str = "/dev/xen/hypercall"; diff --git a/crates/xen-ioctls/src/xdm/types.rs b/crates/xen-ioctls/src/xdm/types.rs index b000a68f0cf1..963583e34b97 100644 --- a/crates/xen-ioctls/src/xdm/types.rs +++ b/crates/xen-ioctls/src/xdm/types.rs @@ -157,3 +157,21 @@ pub struct PrivcmdDeviceModelIrqFd { pub domid: u16, pub pad: [u8; 2], }
+pub const PRIVCMD_IOEVENTFD_FLAG_DEASSIGN: u32 = 1;
+#[repr(C)] +#[derive(Debug, Copy, Clone)] +// tools/include/xen-sys/Linux/privcmd.h::privcmd_ioeventfd +pub struct PrivcmdDeviceModelIoeventFd {
- pub ioreq: *mut c_void,
- pub ports: *const u32,
- pub addr: u64,
- pub addr_len: u32,
- pub event_fd: u32,
- pub vcpus: u32,
- pub vq: u32,
- pub flags: u32,
- pub domid: u16,
- pub pad: [u8; 2],
+} diff --git a/crates/xen-ioctls/src/xdm/xdm.rs b/crates/xen-ioctls/src/xdm/xdm.rs index 3aa5289794fe..5a30d109e65f 100644 --- a/crates/xen-ioctls/src/xdm/xdm.rs +++ b/crates/xen-ioctls/src/xdm/xdm.rs @@ -17,6 +17,8 @@ use std::os::unix::io::AsRawFd; use vmm_sys_util::eventfd::EventFd; +use xen_bindings::bindings::ioreq;
#[cfg(target_arch = "aarch64")] use crate::aarch64::types::*; #[cfg(target_arch = "x86_64")] @@ -307,4 +309,84 @@ impl XenDeviceModelHandle { ) -> Result<(), std::io::Error> { self.config_irqfd(fd, domid, irq, level, PRIVCMD_IRQFD_FLAG_DEASSIGN) }
- pub fn config_ioeventfd(
Is this being called by a client external to this file or is it just called by set_ioeventfd() and clear_ioeventfd()? In the latter case please consider making it a private function.
Thanks, Mathieu
&self,kick: &EventFd,ioreq: &mut ioreq,ports: &[u32],addr: u64,addr_len: u32,vq: u32,vcpus: u32,domid: u16,flags: u32,- ) -> Result<(), std::io::Error> {
let mut ioeventfd = PrivcmdDeviceModelIoeventFd {ioreq: ioreq as *mut _ as *mut c_void,ports: ports as *const _ as *const u32,addr,addr_len,event_fd: kick.as_raw_fd() as u32,vcpus,vq,flags,domid,pad: [0; 2],};let ret = unsafe {// The expression "&mut ioeventfd as *mut _" creates a reference to ioeventfd before casting it// to a *mut c_void.ioctl(self.fd.as_raw_fd(),IOCTL_PRIVCMD_IOEVENTFD(),&mut ioeventfd as *mut _ as *mut c_void,)};if ret < 0 {return Err(Error::last_os_error());}Ok(())- }
- pub fn set_ioeventfd(
&self,kick: &EventFd,ioreq: &mut ioreq,ports: &[u32],addr: u64,addr_len: u32,vq: u32,vcpus: u32,domid: u16,- ) -> Result<(), std::io::Error> {
self.config_ioeventfd(kick, ioreq, ports, addr, addr_len, vq, vcpus, domid, 0)- }
- pub fn clear_ioeventfd(
&self,kick: &EventFd,ioreq: &mut ioreq,ports: &[u32],addr: u64,addr_len: u32,vq: u32,vcpus: u32,domid: u16,- ) -> Result<(), std::io::Error> {
self.config_ioeventfd(kick,ioreq,ports,addr,addr_len,vq,vcpus,domid,PRIVCMD_IOEVENTFD_FLAG_DEASSIGN,)- }
}
2.31.1.272.g89b43f80a514