With the XEN_DOMCTL_dt_overlay DOMCTL added, users should be able to
attach/detach devices from the provided DT overlay to domains.
Support this by introducing a new set of "xl dt-overlay" commands and
related documentation, i.e. "xl dt-overlay {attach,detach}". Slightly
rework the command option parsing logic.
Signed-off-by: Henry Wang
Reviewed-by: Jason Andryuk
---
v4:
- Add Jason's Reviewed-by tag.
v3:
- Introduce new API libxl_dt_overlay_domain() and co., instead of
reusing existing API libxl_dt_overlay().
- Add in-code comments for the LIBXL_DT_OVERLAY_* macros.
- Use find_domain() to avoid getting domain_id from strtol().
v2:
- New patch.
---
tools/include/libxl.h | 10 +++
tools/include/xenctrl.h | 3 +++
tools/libs/ctrl/xc_dt_overlay.c | 31 +
tools/libs/light/libxl_dt_overlay.c | 28 +++
tools/xl/xl_cmdtable.c | 4 +--
tools/xl/xl_vmcontrol.c | 42 -
6 files changed, 104 insertions(+), 14 deletions(-)
diff --git a/tools/include/libxl.h b/tools/include/libxl.h
index 62cb07dea6..6cc6d6bf6a 100644
--- a/tools/include/libxl.h
+++ b/tools/include/libxl.h
@@ -2549,8 +2549,18 @@ libxl_device_pci *libxl_device_pci_list(libxl_ctx *ctx,
uint32_t domid,
void libxl_device_pci_list_free(libxl_device_pci* list, int num);
#if defined(__arm__) || defined(__aarch64__)
+/* Values should keep consistent with the op from XEN_SYSCTL_dt_overlay */
+#define LIBXL_DT_OVERLAY_ADD 1
+#define LIBXL_DT_OVERLAY_REMOVE2
int libxl_dt_overlay(libxl_ctx *ctx, void *overlay,
uint32_t overlay_size, uint8_t overlay_op);
+
+/* Values should keep consistent with the op from XEN_DOMCTL_dt_overlay */
+#define LIBXL_DT_OVERLAY_DOMAIN_ATTACH 1
+#define LIBXL_DT_OVERLAY_DOMAIN_DETACH 2
+int libxl_dt_overlay_domain(libxl_ctx *ctx, uint32_t domain_id,
+void *overlay_dt, uint32_t overlay_dt_size,
+uint8_t overlay_op);
#endif
/*
diff --git a/tools/include/xenctrl.h b/tools/include/xenctrl.h
index 4996855944..9ceca0cffc 100644
--- a/tools/include/xenctrl.h
+++ b/tools/include/xenctrl.h
@@ -2657,6 +2657,9 @@ int xc_domain_cacheflush(xc_interface *xch, uint32_t
domid,
#if defined(__arm__) || defined(__aarch64__)
int xc_dt_overlay(xc_interface *xch, void *overlay_fdt,
uint32_t overlay_fdt_size, uint8_t overlay_op);
+int xc_dt_overlay_domain(xc_interface *xch, void *overlay_fdt,
+ uint32_t overlay_fdt_size, uint8_t overlay_op,
+ uint32_t domain_id);
#endif
/* Compat shims */
diff --git a/tools/libs/ctrl/xc_dt_overlay.c b/tools/libs/ctrl/xc_dt_overlay.c
index c2224c4d15..ea1da522d1 100644
--- a/tools/libs/ctrl/xc_dt_overlay.c
+++ b/tools/libs/ctrl/xc_dt_overlay.c
@@ -48,3 +48,34 @@ err:
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, )) != 0 )
+PERROR("%s failed", __func__);
+
+err:
+xc_hypercall_bounce_post(xch, overlay_fdt);
+
+return err;
+}
diff --git a/tools/libs/light/libxl_dt_overlay.c
b/tools/libs/light/libxl_dt_overlay.c
index a6c709a6dc..00503b76bd 100644
--- a/tools/libs/light/libxl_dt_overlay.c
+++ b/tools/libs/light/libxl_dt_overlay.c
@@ -69,3 +69,31 @@ out:
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;
+}
diff --git a/tools/xl/xl_cmdtable.c b/tools/xl/xl_cmdtable.c
index 1f3c6b5897..37770b20e3 100644
--- a/tools/xl/xl_cmdtable.c
+++
