migration/multifd: add uadk compression framework

Adds the skeleton to support uadk compression method.
Complete functionality will be added in subsequent patches.

Acked-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Fabiano Rosas <farosas@suse.de>

hw/core/qdev-properties-system.c

@@ -659,7 +659,7 @@ const PropertyInfo qdev_prop_fdc_drive_type = {
 const PropertyInfo qdev_prop_multifd_compression = {
     .name = "MultiFDCompression",
     .description = "multifd_compression values, "
-                   "none/zlib/zstd/qpl",
+                   "none/zlib/zstd/qpl/uadk",
     .enum_table = &MultiFDCompression_lookup,
     .get = qdev_propinfo_get_enum,
     .set = qdev_propinfo_set_enum,

migration/meson.build

@@ -40,6 +40,7 @@ endif
 system_ss.add(when: rdma, if_true: files('rdma.c'))
 system_ss.add(when: zstd, if_true: files('multifd-zstd.c'))
 system_ss.add(when: qpl, if_true: files('multifd-qpl.c'))
+system_ss.add(when: uadk, if_true: files('multifd-uadk.c'))
 
 specific_ss.add(when: 'CONFIG_SYSTEM_ONLY',
                 if_true: files('ram.c',

migration/multifd-uadk.c

@@ -0,0 +1,20 @@
+/*
+ * Multifd UADK compression accelerator implementation
+ *
+ * Copyright (c) 2024 Huawei Technologies R & D (UK) Ltd
+ *
+ * Authors:
+ *  Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
+ *
+ * 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 "qemu/module.h"
+
+static void multifd_uadk_register(void)
+{
+    /* noop for now */
+}
+migration_init(multifd_uadk_register);

migration/multifd.h

@@ -34,13 +34,14 @@ MultiFDRecvData *multifd_get_recv_data(void);
 /* Multifd Compression flags */
 #define MULTIFD_FLAG_SYNC (1 << 0)
 
-/* We reserve 3 bits for compression methods */
+/* We reserve 4 bits for compression methods */
-#define MULTIFD_FLAG_COMPRESSION_MASK (7 << 1)
+#define MULTIFD_FLAG_COMPRESSION_MASK (0xf << 1)
 /* we need to be compatible. Before compression value was 0 */
 #define MULTIFD_FLAG_NOCOMP (0 << 1)
 #define MULTIFD_FLAG_ZLIB (1 << 1)
 #define MULTIFD_FLAG_ZSTD (2 << 1)
 #define MULTIFD_FLAG_QPL (4 << 1)
+#define MULTIFD_FLAG_UADK (8 << 1)
 
 /* This value needs to be a multiple of qemu_target_page_size() */
 #define MULTIFD_PACKET_SIZE (512 * 1024)

qapi/migration.json

@@ -559,12 +559,15 @@
 #       In-Memory Analytics Accelerator(IAA) accelerated compression
 #       and decompression.  (Since 9.1)
 #
+# @uadk: use UADK library compression method.  (Since 9.1)
+#
 # Since: 5.0
 ##
 { 'enum': 'MultiFDCompression',
   'data': [ 'none', 'zlib',
             { 'name': 'zstd', 'if': 'CONFIG_ZSTD' },
-            { 'name': 'qpl', 'if': 'CONFIG_QPL' } ] }
+            { 'name': 'qpl', 'if': 'CONFIG_QPL' },
+            { 'name': 'uadk', 'if': 'CONFIG_UADK' } ] }
 
 ##
 # @MigMode: