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russellcnv
2024-04-01 11:46:00 -07:00
parent 66b6384d48
commit acebc4bb78
55 changed files with 1142 additions and 514 deletions
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26
kernel-open/nvidia-uvm/uvm_hopper.c
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@@ -27,6 +27,24 @@
#include "uvm_mem.h"
#include "uvm_hopper_fault_buffer.h"
static uvm_gpu_peer_copy_mode_t hopper_peer_copy_mode(uvm_parent_gpu_t *parent_gpu)
{
// In Confidential Computing the Copy Engine supports encrypted copies
// between peers. But in Hopper these transfers require significant
// software support (ex: unprotected vidmem), so in practice they are not
// allowed.
if (g_uvm_global.conf_computing_enabled)
return UVM_GPU_PEER_COPY_MODE_UNSUPPORTED;
// TODO: Bug 4174553: In some Grace Hopper setups, physical peer copies
// result on errors. Force peer copies to use virtual addressing until the
// issue is clarified.
if (uvm_parent_gpu_is_coherent(parent_gpu))
return UVM_GPU_PEER_COPY_MODE_VIRTUAL;
return g_uvm_global.peer_copy_mode;
}
void uvm_hal_hopper_arch_init_properties(uvm_parent_gpu_t *parent_gpu)
{
parent_gpu->tlb_batch.va_invalidate_supported = true;
@@ -58,14 +76,10 @@ void uvm_hal_hopper_arch_init_properties(uvm_parent_gpu_t *parent_gpu)
parent_gpu->flat_vidmem_va_base = (64 * UVM_SIZE_1PB) + (32 * UVM_SIZE_1TB);
// Physical CE writes to vidmem are non-coherent with respect to the CPU on
// GH180.
// Grace Hopper.
parent_gpu->ce_phys_vidmem_write_supported = !uvm_parent_gpu_is_coherent(parent_gpu);
// TODO: Bug 4174553: [HGX-SkinnyJoe][GH180] channel errors discussion/debug
// portion for the uvm tests became nonresponsive after
// some time and then failed even after reboot
parent_gpu->peer_copy_mode = uvm_parent_gpu_is_coherent(parent_gpu) ?
UVM_GPU_PEER_COPY_MODE_VIRTUAL : g_uvm_global.peer_copy_mode;
parent_gpu->peer_copy_mode = hopper_peer_copy_mode(parent_gpu);
// All GR context buffers may be mapped to 57b wide VAs. All "compute" units
// accessing GR context buffers support the 57-bit VA range.