mirror of
https://dev.lirent.ru/Vatrog/vm-automation-signaling.git
synced 2026-06-25 20:36:36 +03:00
lirent
9bde398b6c
- core: runtime attach/detach of a per-endpoint adapter trio (runtime-safe add_adapter + vmsig_core_detach_endpoint, deferred reap) - roster: VMSIG_EV_ROSTER + CAP_ROSTER, retained per-endpoint and replayed to late subscribers - discovery: inotify trigger dir, vmid/endpoint slot allocator, host probe; vmsigd daemon with config + per-uid admission - input driver and vgpu perception built in-tree; vgpu perception as a separate library - memctx: own the supplied ro_fd (closed at detach) - deb packaging: install rules, systemd unit, tmpfiles, default config
40 lines
2.0 KiB
C
40 lines
2.0 KiB
C
/* control.c — control-write SEAM ONLY (this never writes guest memory).
|
|
*
|
|
* The actual write is performed elsewhere, by a component that holds read-write
|
|
* access to the region; this only builds the desired vgpu_control_t image from
|
|
* the intent and computes the GVA + offset/length of the significant field range
|
|
* for that atomic write under the ctrl_gen seqlock. There is no gva_write here
|
|
* and there must not be — the source is a RO fd that would fault on a store anyway.
|
|
*
|
|
* The reported out_ctrl_gva is a GVA in the PRODUCER's user address space
|
|
* (region base + VGPU_CONTROL_OFFSET, cached as r->ctrl_gva): the external write
|
|
* MUST be performed under r->proc_cr3, NOT the System kcr3.
|
|
*/
|
|
|
|
#include "perception-internal.h"
|
|
|
|
int vgpup_build_control_write(vgpup_region* r, const vgpup_control_intent* in,
|
|
vgpu_control_t* out_frame, uint64_t* out_ctrl_gva,
|
|
uint32_t* out_off, uint32_t* out_len)
|
|
{
|
|
if (!r || !in || !out_frame || !out_ctrl_gva || !out_off || !out_len) { return -1; }
|
|
|
|
/* Fill the desired control image. ctrl_gen stays 0: the writer owns it under
|
|
* the seqlock. consumer_tick/attached carry separate heartbeat/intent
|
|
* semantics and are not part of this intent. */
|
|
memset(out_frame, 0, sizeof *out_frame);
|
|
out_frame->desired_state = in->desired_state;
|
|
out_frame->target_fps = in->target_fps;
|
|
out_frame->draw_cursor = in->draw_cursor;
|
|
out_frame->full_frame_req = in->full_frame_req;
|
|
|
|
*out_ctrl_gva = r->ctrl_gva; /* region base + VGPU_CONTROL_OFFSET (cached) */
|
|
|
|
/* Significant range: desired_state .. full_frame_req (contiguous in the ABI),
|
|
* i.e. offsetof(desired_state) through the end of full_frame_req. */
|
|
*out_off = (uint32_t)offsetof(vgpu_control_t, desired_state);
|
|
*out_len = (uint32_t)(offsetof(vgpu_control_t, full_frame_req) + sizeof(uint32_t)
|
|
- offsetof(vgpu_control_t, desired_state));
|
|
return 0;
|
|
}
|