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| author | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-10-07 15:05:08 -0400 |
|---|---|---|
| committer | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-10-07 15:05:08 -0400 |
| commit | 6aeb72dd60aec44325d293963156f6c90f7de9f0 (patch) | |
| tree | 5b9aaf6aaca4c765a4f23f948f58c4b48844e0ba /kernel/gsp_phys_gpu.c | |
| parent | e6de8e91340916467c16ddd246868b04083f68a2 (diff) | |
| download | open-iov-6aeb72dd60aec44325d293963156f6c90f7de9f0.tar.gz open-iov-6aeb72dd60aec44325d293963156f6c90f7de9f0.zip | |
vgsp: m106 - pre-install the data PT window pool in stage 3 (pre-commit)
Post-commit UPDATE_PDE_2 installs are accepted (status 0x0) but ineffective
(m94's scratch windows, m101-m105's reloc windows: the SM never resolves
them), while the stage-3 ctx-window installs are honoured. Add a fixed
32-window pool at GSP_PHYS_RMCALL_VA_GR_DATA_BASE (0x100000000 + k<<21,
inside the server-managed region), each backed by a module PT page
installed through UPDATE_PDE_2 during stage 3; the engine data map then
only writes leaf PTEs into those fresh PT pages at launch (the P6b-proven
'direct leaf write into a walker-installed fresh table' pattern). The mail
injection uses the reserved last window (k=31); service data windows cap
at 31 and use the same fixed layout.
Diffstat (limited to 'kernel/gsp_phys_gpu.c')
| -rw-r--r-- | kernel/gsp_phys_gpu.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/gsp_phys_gpu.c b/kernel/gsp_phys_gpu.c index a350ed9..e92e5f1 100644 --- a/kernel/gsp_phys_gpu.c +++ b/kernel/gsp_phys_gpu.c @@ -1030,6 +1030,26 @@ int gsp_phys_rmcall_gr_mail_patch_value(void) EXPORT_SYMBOL_GPL(gsp_phys_rmcall_gr_mail_patch_value); /* + * m106: pre-install the fixed data PT pool (32 windows at + * GSP_PHYS_RMCALL_VA_GR_DATA_BASE) during stage 3, before the channel + * commit. Post-commit UPDATE_PDE_2 installs are accepted but ineffective + * (m101-m105); the ctx-window installs show the pre-commit path is the + * one the engine honours. Launch-time work is then only leaf PTE writes + * into these freshly installed PT pages. Default 0. + */ +static int gsp_phys_rmcall_gr_data_prewin_param; +module_param_named(gsp_phys_rmcall_gr_data_prewin, + gsp_phys_rmcall_gr_data_prewin_param, int, 0644); +MODULE_PARM_DESC(gsp_phys_rmcall_gr_data_prewin, + "Pre-install the data PT window pool in stage 3 (default 0)"); + +int gsp_phys_rmcall_gr_data_prewin_value(void) +{ + return gsp_phys_rmcall_gr_data_prewin_param; +} +EXPORT_SYMBOL_GPL(gsp_phys_rmcall_gr_data_prewin_value); + +/* * m95: program each GPC's MMU_CTRL from the hub's PFB MMU_CTRL (the real RM's * grInitGPCMmuPRIRegs matching-fields copy) before a forwarded launch. The * GPC-side walker refuses the SM I-fetch with MMU_NACK while hub-side reads |