Files
koboldcpp/ggml/src/ggml-virtgpu/ggml-backend.cpp
T
Kevin Pouget ffaafde16f ggml-virtgpu: improve the reliability of the code (#19846)
* ggml-virtgpu-backend: validate the consistency of the received objects

This patch adds consistency checks in the
ggml-virtgpu-backend (running on the host side) to ensure that the
data received from the guest is consistent (valid pointers, valid
sizes and offsets).

* ggml-virtgpu-backend: add fallback/skips for optional ggml backend methods

```
  1. bck->iface.synchronize(bck)
  2. buft->iface.get_alloc_size(buft, op)
  3. buft->iface.get_max_size(buft)
```

these three methods are optional in the GGML interface. `get_max_size`
was already properly defaulted, but `backend sychronize` and `butf
get_max_size` would have segfaulted the backend if not implemented.

* ggml-virtgpu-backend: fix log format missing argument

* ggml-virtgpu-backend: improve the abort message

* ggml-virtgpu-backend: more safety checks

* ggml-virtgpu-backend: new error code

* ggml-virtgpu-backend: initialize all the error codes

* ggml-virtgpu: add a missing comment generated by the code generator

* ggml-virtgpu: add the '[virtgpu]' prefix to the device/buffer names

* ggml-virtgpu: apir_device_buffer_from_ptr: improve the error message

* ggml-virtgpu: shared: make it match the latest api_remoting.h of Virglrenderer APIR

(still unmerged)

* ggml-virtgpu: update the code generator to have dispatch_command_name in a host/guest shared file

* ggml-virtgpu: REMOTE_CALL: fail if the backend returns an error

* docs/backend/VirtGPU.md: indicate that the RAM+VRAM size is limed to 64 GB with libkrun

* ggml-virtgpu: turn off clang-format header ordering for some of the files

Compilation breaks when ordered alphabetically.

* ggml-virtgpu: clang-format

* ggml-virtgpu/backend/shared/api_remoting: better comments for the APIR return codes
2026-02-26 20:00:57 +08:00

70 lines
2.5 KiB
C++

#include "../../include/ggml-virtgpu.h"
#include "ggml-remoting.h"
static const char * ggml_backend_remoting_get_name(ggml_backend_t backend) {
UNUSED(backend);
return "API Remoting backend";
}
static void ggml_backend_remoting_free(ggml_backend_t backend) {
delete backend;
}
static ggml_status ggml_backend_remoting_graph_compute(ggml_backend_t backend, ggml_cgraph * cgraph) {
virtgpu * gpu = DEV_TO_GPU(backend->device);
return apir_backend_graph_compute(gpu, cgraph);
}
static void ggml_backend_remoting_graph_optimize(ggml_backend_t backend, ggml_cgraph * cgraph) {
virtgpu * gpu = DEV_TO_GPU(backend->device);
#if true
UNUSED(gpu);
UNUSED(cgraph);
#else
// not working yet
apir_backend_graph_optimize(gpu, cgraph);
#endif
}
static ggml_backend_i ggml_backend_remoting_interface = {
/* .get_name = */ ggml_backend_remoting_get_name,
/* .free = */ ggml_backend_remoting_free,
/* .set_tensor_async = */ NULL, // ggml_backend_remoting_set_tensor_async,
/* .get_tensor_async = */ NULL, // ggml_backend_remoting_get_tensor_async,
/* .cpy_tensor_async = */ NULL, // ggml_backend_remoting_cpy_tensor_async,
/* .synchronize = */ NULL, // ggml_backend_remoting_synchronize,
/* .graph_plan_create = */ NULL,
/* .graph_plan_free = */ NULL,
/* .graph_plan_update = */ NULL,
/* .graph_plan_compute = */ NULL,
/* .graph_compute = */ ggml_backend_remoting_graph_compute,
/* .event_record = */ NULL,
/* .event_wait = */ NULL,
/* .graph_optimize = */ ggml_backend_remoting_graph_optimize,
};
static ggml_guid_t ggml_backend_remoting_guid() {
static ggml_guid guid = { 0xb8, 0xf7, 0x4f, 0x86, 0x14, 0x03, 0x86, 0x02,
0x91, 0xc8, 0xdd, 0xe9, 0x02, 0x3f, 0xc0, 0x2b };
return &guid;
}
ggml_backend_t ggml_backend_remoting_device_init(ggml_backend_dev_t dev, const char * params) {
UNUSED(params);
ggml_backend_remoting_device_context * ctx = (ggml_backend_remoting_device_context *) dev->context;
ggml_backend_t remoting_backend = new ggml_backend{
/* .guid = */ ggml_backend_remoting_guid(),
/* .interface = */ ggml_backend_remoting_interface,
/* .device = */ ggml_backend_reg_dev_get(ggml_backend_virtgpu_reg(), ctx->device),
/* .context = */ ctx,
};
return remoting_backend;
}