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Add a Dom0 helper for deassigning DT-based devices from a Xen guest domain #100321

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Merged
nashif merged 1 commit into from
Dec 3, 2025
Merged

Add a Dom0 helper for deassigning DT-based devices from a Xen guest domain #100321

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15 changes: 15 additions & 0 deletions drivers/xen/dom0/domctl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -240,6 +240,21 @@ int xen_domctl_assign_dt_device(int domid, char *dtdev_path)

}

int xen_domctl_deassign_dt_device(int domid, char *dtdev_path)
{
xen_domctl_t domctl = {
.domain = domid,
.cmd = XEN_DOMCTL_deassign_device,
.u.assign_device.flags = 0,
.u.assign_device.dev = XEN_DOMCTL_DEV_DT,
.u.assign_device.u.dt.size = strlen(dtdev_path),
};

set_xen_guest_handle(domctl.u.assign_device.u.dt.path, dtdev_path);

return do_domctl(&domctl);
}

int xen_domctl_bind_pt_irq(int domid, uint32_t machine_irq, uint8_t irq_type,
uint8_t bus, uint8_t device, uint8_t intx, uint8_t isa_irq,
uint16_t spi)
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10 changes: 10 additions & 0 deletions include/zephyr/xen/dom0/domctl.h
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Expand Up @@ -175,6 +175,16 @@ int xen_domctl_memory_mapping(int domid, uint64_t first_gfn, uint64_t first_mfn,
*/
int xen_domctl_assign_dt_device(int domid, char *dtdev_path);

/**
* @brief Deassign a device from a guest domain.
*
* @param domid The ID of the domain from which the device should be deassigned.
* @param dtdev_path The path of the device tree device to be deassigned.
* @retval 0 on success.
* @retval -errno on failure.
*/
int xen_domctl_deassign_dt_device(int domid, char *dtdev_path);

/**
* @brief Binds a physical IRQ to a specified domain.
*
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