mirror of
https://github.com/xen-project/xen.git
synced 2026-10-29 18:50:05 +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>
100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
/*
|
|
* Copyright (C) 2021 Xilinx Inc.
|
|
* Author Vikram Garhwal <fnu.vikram@xilinx.com>
|
|
*
|
|
* This program 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 only. with the special
|
|
* exception on linking described in file LICENSE.
|
|
*
|
|
* This program 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.
|
|
*/
|
|
|
|
#include "libxl_osdeps.h" /* must come before any other headers */
|
|
#include "libxl_internal.h"
|
|
#include <libfdt.h>
|
|
#include <xenctrl.h>
|
|
|
|
static int check_overlay_fdt(libxl__gc *gc, void *fdt, size_t size)
|
|
{
|
|
int r;
|
|
|
|
if (fdt_magic(fdt) != FDT_MAGIC) {
|
|
LOG(ERROR, "Overlay FDT is not a valid Flat Device Tree");
|
|
return ERROR_FAIL;
|
|
}
|
|
|
|
r = fdt_check_header(fdt);
|
|
if (r) {
|
|
LOG(ERROR, "Failed to check the overlay FDT (%d)", r);
|
|
return ERROR_FAIL;
|
|
}
|
|
|
|
if (fdt_totalsize(fdt) > size) {
|
|
LOG(ERROR, "Overlay FDT totalsize is too big");
|
|
return ERROR_FAIL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int libxl_dt_overlay(libxl_ctx *ctx, void *overlay_dt, uint32_t overlay_dt_size,
|
|
uint8_t overlay_op)
|
|
{
|
|
int rc;
|
|
int r;
|
|
GC_INIT(ctx);
|
|
|
|
if (check_overlay_fdt(gc, overlay_dt, overlay_dt_size)) {
|
|
LOG(ERROR, "Overlay DTB check failed");
|
|
rc = ERROR_FAIL;
|
|
goto out;
|
|
} else {
|
|
LOG(DEBUG, "Overlay DTB check passed");
|
|
rc = 0;
|
|
}
|
|
|
|
r = xc_dt_overlay(ctx->xch, overlay_dt, overlay_dt_size, overlay_op);
|
|
|
|
if (r) {
|
|
LOG(ERROR, "%s: Adding/Removing overlay dtb failed.", __func__);
|
|
rc = ERROR_FAIL;
|
|
}
|
|
|
|
out:
|
|
GC_FREE;
|
|
return rc;
|
|
}
|
|
|
|
int libxl_dt_overlay_domain(libxl_ctx *ctx, uint32_t domain_id,
|
|
void *overlay_dt, uint32_t overlay_dt_size,
|
|
uint8_t overlay_op)
|
|
{
|
|
int rc;
|
|
int r;
|
|
GC_INIT(ctx);
|
|
|
|
if (check_overlay_fdt(gc, overlay_dt, overlay_dt_size)) {
|
|
LOG(ERROR, "Overlay DTB check failed");
|
|
rc = ERROR_FAIL;
|
|
goto out;
|
|
} else {
|
|
LOG(DEBUG, "Overlay DTB check passed");
|
|
rc = 0;
|
|
}
|
|
|
|
r = xc_dt_overlay_domain(ctx->xch, overlay_dt, overlay_dt_size, overlay_op,
|
|
domain_id);
|
|
if (r) {
|
|
LOG(ERROR, "%s: Attaching/Detaching overlay dtb failed.", __func__);
|
|
rc = ERROR_FAIL;
|
|
}
|
|
|
|
out:
|
|
GC_FREE;
|
|
return rc;
|
|
}
|