mirror of
https://github.com/xen-project/xen.git
synced 2026-10-29 10:40:03 +01:00
Henry Wang
2c4fbadf73
With the XEN_DOMCTL_dt_overlay DOMCTL added, users should be able to attach (in the future also detach) devices from the provided DT overlay to domains. Support this by introducing a new "xl dt-overlay" command and related documentation, i.e. "xl dt-overlay attach. Slightly rework the command option parsing logic. Signed-off-by: Henry Wang <xin.wang2@amd.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@amd.com> Reviewed-by: Jason Andryuk <jason.andryuk@amd.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
/*
|
|
*
|
|
* Device Tree Overlay functions.
|
|
* Copyright (C) 2021 Xilinx Inc.
|
|
* Author Vikram Garhwal <fnu.vikram@xilinx.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation;
|
|
* version 2.1 of the License.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "xc_private.h"
|
|
|
|
int xc_dt_overlay(xc_interface *xch, void *overlay_fdt,
|
|
uint32_t overlay_fdt_size, uint8_t overlay_op)
|
|
{
|
|
int err;
|
|
struct xen_sysctl sysctl = {
|
|
.cmd = XEN_SYSCTL_dt_overlay,
|
|
.u.dt_overlay = {
|
|
.overlay_op = overlay_op,
|
|
.overlay_fdt_size = overlay_fdt_size,
|
|
}
|
|
};
|
|
|
|
DECLARE_HYPERCALL_BOUNCE(overlay_fdt, overlay_fdt_size,
|
|
XC_HYPERCALL_BUFFER_BOUNCE_IN);
|
|
|
|
if ( (err = xc_hypercall_bounce_pre(xch, overlay_fdt)) )
|
|
goto err;
|
|
|
|
set_xen_guest_handle(sysctl.u.dt_overlay.overlay_fdt, overlay_fdt);
|
|
|
|
if ( (err = do_sysctl(xch, &sysctl)) != 0 )
|
|
PERROR("%s failed", __func__);
|
|
|
|
err:
|
|
xc_hypercall_bounce_post(xch, overlay_fdt);
|
|
|
|
return err;
|
|
}
|
|
|
|
int xc_dt_overlay_domain(xc_interface *xch, void *overlay_fdt,
|
|
uint32_t overlay_fdt_size, uint8_t overlay_op,
|
|
uint32_t domain_id)
|
|
{
|
|
int err;
|
|
struct xen_domctl domctl = {
|
|
.cmd = XEN_DOMCTL_dt_overlay,
|
|
.domain = domain_id,
|
|
.u.dt_overlay = {
|
|
.overlay_op = overlay_op,
|
|
.overlay_fdt_size = overlay_fdt_size,
|
|
}
|
|
};
|
|
|
|
DECLARE_HYPERCALL_BOUNCE(overlay_fdt, overlay_fdt_size,
|
|
XC_HYPERCALL_BUFFER_BOUNCE_IN);
|
|
|
|
if ( (err = xc_hypercall_bounce_pre(xch, overlay_fdt)) )
|
|
goto err;
|
|
|
|
set_xen_guest_handle(domctl.u.dt_overlay.overlay_fdt, overlay_fdt);
|
|
|
|
if ( (err = do_domctl(xch, &domctl)) != 0 )
|
|
PERROR("%s failed", __func__);
|
|
|
|
err:
|
|
xc_hypercall_bounce_post(xch, overlay_fdt);
|
|
|
|
return err;
|
|
}
|