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[v4,23/33] vfio/migration: Multifd device state transfer support - basic types

Message ID eaf874f64709ab9ac88ef96d1656d9d9d423ec78.1738171076.git.maciej.szmigiero@oracle.com (mailing list archive)
State New
Headers show
Series Multifd ���� device state transfer support with VFIO consumer | expand

Commit Message

Maciej S. Szmigiero Jan. 30, 2025, 10:08 a.m. UTC 
From: "Maciej S. Szmigiero" <maciej.szmigiero@oracle.com>

Add basic types and flags used by VFIO multifd device state transfer
support.

Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
---
 hw/vfio/migration.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
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Patch

diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c
index cbb1e0b6f852..715182c4f810 100644
--- a/hw/vfio/migration.c
+++ b/hw/vfio/migration.c
@@ -47,6 +47,7 @@ 
 #define VFIO_MIG_FLAG_DEV_SETUP_STATE   (0xffffffffef100003ULL)
 #define VFIO_MIG_FLAG_DEV_DATA_STATE    (0xffffffffef100004ULL)
 #define VFIO_MIG_FLAG_DEV_INIT_DATA_SENT (0xffffffffef100005ULL)
+#define VFIO_MIG_FLAG_DEV_CONFIG_LOAD_READY (0xffffffffef100006ULL)
 
 /*
  * This is an arbitrary size based on migration of mlx5 devices, where typically
@@ -55,6 +56,15 @@ 
  */
 #define VFIO_MIG_DEFAULT_DATA_BUFFER_SIZE (1 * MiB)
 
+#define VFIO_DEVICE_STATE_CONFIG_STATE (1)
+
+typedef struct VFIODeviceStatePacket {
+    uint32_t version;
+    uint32_t idx;
+    uint32_t flags;
+    uint8_t data[0];
+} QEMU_PACKED VFIODeviceStatePacket;
+
 static int64_t bytes_transferred;
 
 static const char *mig_state_to_str(enum vfio_device_mig_state state)