diff options
Diffstat (limited to 'kernel/gsp_rpc_client.c')
| -rw-r--r-- | kernel/gsp_rpc_client.c | 40 |
1 files changed, 34 insertions, 6 deletions
diff --git a/kernel/gsp_rpc_client.c b/kernel/gsp_rpc_client.c index ae45513..93c1876 100644 --- a/kernel/gsp_rpc_client.c +++ b/kernel/gsp_rpc_client.c @@ -375,8 +375,8 @@ int gsp_rpc_unpin(struct gsp_client *client, u64 handle, u64 offset, u64 size) /* BAR Trap Emulation */ int gsp_rpc_bar_trap(struct gsp_client *client, - u64 bar_addr, u32 access_type, u32 size, - u64 value, u32 bar_num, u64 *ret_value) + u64 bar_addr, u32 access_type, u32 size, + u64 value, u32 bar_num, u64 *ret_value) { struct gsp_bar_trap_req req = {0}; struct gsp_bar_trap_rsp rsp = {0}; @@ -384,6 +384,17 @@ int gsp_rpc_bar_trap(struct gsp_client *client, u32 seq = gsp_next_seq(client); int ret; + /* In emulation mode there is no real firmware to submit to, and + * submit_raw would ring the very doorbell the emulation thread polls + * (self-triggered RPC livelock + timeout stall). Guest BAR access is + * synchronous MMIO via the shadow mapping and never needs this RPC. + * Real shadow-register handlers are TODO; fail fast and loudly. */ + if (gsp_rpc_emulation_is_enabled()) { + pr_warn_ratelimited("gsp_rpc_bar_trap: not supported in emulation mode (bar=%u addr=0x%llx)\n", + bar_num, bar_addr); + return -ENOTSUPP; + } + req.bar_addr = bar_addr; req.access_type = access_type; req.size = size; @@ -413,9 +424,19 @@ int gsp_rpc_migrate_save(struct gsp_client *client, struct gsp_migrate_req req = {0}; struct gsp_migrate_rsp rsp = {0}; struct gsp_rpc_response response = {0}; - u32 seq = gsp_next_seq(client); + u32 seq; int ret; + /* Emulation mode: no real firmware; submit_raw would ring the doorbell + * the emulation thread polls (self-triggered livelock + 30s stall). + * Live migration over the emulated vGPU is not yet implemented; + * see kernel/migration.c for the 4-phase host-side protocol work. */ + if (gsp_rpc_emulation_is_enabled()) { + pr_warn_ratelimited("gsp_rpc_migrate_save: not supported in emulation mode\n"); + return -ENOTSUPP; + } + + seq = gsp_next_seq(client); req.src_gpu_id = src_gpu_id; req.dst_gpu_id = dst_gpu_id; req.memory_bitmap = memory_bitmap; @@ -444,9 +465,16 @@ int gsp_rpc_migrate_restore(struct gsp_client *client, { struct gsp_migrate_req req = {0}; struct gsp_rpc_response response = {0}; - u32 seq = gsp_next_seq(client); + u32 seq; int ret; + /* Emulation mode: no real firmware; see gsp_rpc_migrate_save note. */ + if (gsp_rpc_emulation_is_enabled()) { + pr_warn_ratelimited("gsp_rpc_migrate_restore: not supported in emulation mode\n"); + return -ENOTSUPP; + } + + seq = gsp_next_seq(client); req.src_gpu_id = src_gpu_id; req.dst_gpu_id = dst_gpu_id; req.memory_bitmap = memory_bitmap; @@ -777,7 +805,7 @@ int gsp_rpc_schedule(struct gsp_client *client, u32 seq = gsp_next_seq(client); int ret; - if (gsp_emulation_enabled) { + if (gsp_rpc_emulation_is_enabled()) { struct gsp_sched_work *sched = kzalloc(sizeof(*sched), GFP_KERNEL); if (!sched) return -ENOMEM; @@ -827,7 +855,7 @@ int gsp_rpc_yield(struct gsp_client *client) u32 seq = gsp_next_seq(client); int ret; - if (gsp_emulation_enabled) { + if (gsp_rpc_emulation_is_enabled()) { /* In emulation, yield is a no-op success */ return 0; } |