Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 45 insertions, 0 deletions

diff --git a/hw/ppc/fw_cfg.c b/hw/ppc/fw_cfg.c
new file mode 100644
index 000000000..a88b5c4bd
--- /dev/null
+++ b/hw/ppc/fw_cfg.c
@@ -0,0 +1,45 @@
+/*
+ * fw_cfg helpers (PPC specific)
+ *
+ * Copyright (c) 2019 Red Hat, Inc.
+ *
+ * Author:
+ *   Philippe Mathieu-Daudé <philmd@redhat.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "hw/ppc/ppc.h"
+#include "hw/nvram/fw_cfg.h"
+
+const char *fw_cfg_arch_key_name(uint16_t key)
+{
+    static const struct {
+        uint16_t key;
+        const char *name;
+    } fw_cfg_arch_wellknown_keys[] = {
+        {FW_CFG_PPC_WIDTH, "width"},
+        {FW_CFG_PPC_HEIGHT, "height"},
+        {FW_CFG_PPC_DEPTH, "depth"},
+        {FW_CFG_PPC_TBFREQ, "tbfreq"},
+        {FW_CFG_PPC_CLOCKFREQ, "clockfreq"},
+        {FW_CFG_PPC_IS_KVM, "is_kvm"},
+        {FW_CFG_PPC_KVM_HC, "kvm_hc"},
+        {FW_CFG_PPC_KVM_PID, "pid"},
+        {FW_CFG_PPC_NVRAM_ADDR, "nvram_addr"},
+        {FW_CFG_PPC_BUSFREQ, "busfreq"},
+        {FW_CFG_PPC_NVRAM_FLAT, "nvram_flat"},
+        {FW_CFG_PPC_VIACONFIG, "viaconfig"},
+    };
+
+    for (size_t i = 0; i < ARRAY_SIZE(fw_cfg_arch_wellknown_keys); i++) {
+        if (fw_cfg_arch_wellknown_keys[i].key == key) {
+            return fw_cfg_arch_wellknown_keys[i].name;
+        }
+    }
+    return NULL;
+}