[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[XEN][PATCH v5 16/17] tools/libs/light: Implement new libxl functions for device tree overlay ops


  • To: <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Vikram Garhwal <vikram.garhwal@xxxxxxx>
  • Date: Tue, 11 Apr 2023 12:16:17 -0700
  • Arc-authentication-results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=lists.xenproject.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none
  • Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=91E2KEtRfiC4xks88DcPT08G46pT034ykx3UwRRlezk=; b=nxIqwyEEBoGjZ2Kuiet6/zxQ1rXzFTD9+Tb8gozYJ/K69DjIujomDliSsWjN6KFcbMnN2aGkwTczNRgYS6wjhAw1GVWvCHbB877FDdlw/Z7ryiq0f0E0TkFr6zwbr6c+9/31vEwBGNPKAdGpMRl/1MRnkUrrkz2ExOW5z/Z0zUwocZDZe/bCYvRT+gZkSJQEFXS9Co2Di9Fi9PdJNEPQh4Q9FWsxvw/v6dOeJyMpOK92Qi76t4Up2UXXyPumbKQtuUsjFySgj4hkfiGchNgMjtqJzNIDEQ6BlcddYezacJLktwxN2ZYOhv3OVqVhnjwCzVsVvyy5irVapGD5gnheKQ==
  • Arc-seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=E8b/gdsp9EhJpwqEqWnSuieF6eymTrNe7CZCQIhNlXPnI9rbzaQ9wvtKtsjf8kP5i3R8URY/xdnXA4z5xpo6gHBEMWaxZykiVSxkS5IX9GPzCVHxrsWjarIu4i2Gai1OZW1LhqjKfQ3613hbwJtVwcHRkvsqrjZQMhmB1zr+3fL7NYtkYjn/O/lE3EtnFmvqnRpqZjW2HhvCO8FLrJFTjXGgjdfpCxF+iPM1wo6kyd6vUyRKgOAiYIQGCBzoEf0Qa6jDfyC4ZMVRSiSGssuo3vgTR2fcrzTK+5aDDiUAsT2QnfwW7VVz06WpZOzG8MrZh1Rzisa1hHvAHTmyd6+Ukw==
  • Cc: <sstabellini@xxxxxxxxxx>, Vikram Garhwal <vikram.garhwal@xxxxxxx>, Wei Liu <wl@xxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>
  • Delivery-date: Tue, 11 Apr 2023 19:19:58 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

Signed-off-by: Vikram Garhwal <vikram.garhwal@xxxxxxx>
---
 tools/include/libxl.h               | 11 +++++
 tools/libs/light/Makefile           |  3 ++
 tools/libs/light/libxl_dt_overlay.c | 71 +++++++++++++++++++++++++++++
 3 files changed, 85 insertions(+)
 create mode 100644 tools/libs/light/libxl_dt_overlay.c

diff --git a/tools/include/libxl.h b/tools/include/libxl.h
index cfa1a19131..1c5e8abaae 100644
--- a/tools/include/libxl.h
+++ b/tools/include/libxl.h
@@ -250,6 +250,12 @@
  */
 #define LIBXL_HAVE_DEVICETREE_PASSTHROUGH 1
 
+#if defined(__arm__) || defined(__aarch64__)
+/**
+ * This means Device Tree Overlay is supported.
+ */
+#define LIBXL_HAVE_DT_OVERLAY 1
+#endif
 /*
  * libxl_domain_build_info has device_model_user to specify the user to
  * run the device model with. See docs/misc/qemu-deprivilege.txt.
@@ -2453,6 +2459,11 @@ libxl_device_pci *libxl_device_pci_list(libxl_ctx *ctx, 
uint32_t domid,
                                         int *num);
 void libxl_device_pci_list_free(libxl_device_pci* list, int num);
 
+#if defined(__arm__) || defined(__aarch64__)
+int libxl_dt_overlay(libxl_ctx *ctx, void *overlay,
+                     uint32_t overlay_size, uint8_t overlay_op);
+#endif
+
 /*
  * Turns the current process into a backend device service daemon
  * for a driver domain.
diff --git a/tools/libs/light/Makefile b/tools/libs/light/Makefile
index 96daeabc47..563a1e8d0a 100644
--- a/tools/libs/light/Makefile
+++ b/tools/libs/light/Makefile
@@ -112,6 +112,9 @@ OBJS-y += _libxl_types.o
 OBJS-y += libxl_flask.o
 OBJS-y += _libxl_types_internal.o
 
+# Device tree overlay is enabled only for ARM architecture.
+OBJS-$(CONFIG_ARM) += libxl_dt_overlay.o
+
 ifeq ($(CONFIG_LIBNL),y)
 CFLAGS_LIBXL += $(LIBNL3_CFLAGS)
 endif
diff --git a/tools/libs/light/libxl_dt_overlay.c 
b/tools/libs/light/libxl_dt_overlay.c
new file mode 100644
index 0000000000..a6c709a6dc
--- /dev/null
+++ b/tools/libs/light/libxl_dt_overlay.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2021 Xilinx Inc.
+ * Author Vikram Garhwal <fnu.vikram@xxxxxxxxxx>
+ *
+ * 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;
+}
+
-- 
2.17.1




 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.