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[video_core] cpu buffer fix + kepler uploads / maxwell macro dirty tracking fixes (#4473)

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- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions).
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-------------------

Aimed to fix two known UE5 crashes: Kepler uploads and Maxwell macros, both caused by CPU/GPU races due dirty tracking issues.

Kepler ComputeInline: preserved dirty tracking across dma continuations and async readback.
Maxwell macros: preserved gpu owned subranges during page granular cpu uploads.
DiscardWrite: stopped clearing neighboring macro arguments by rounding up ranges.
DMA Step: improved continuation aware dirty sampling.

To the Ender Magnolia crew (maybe 1 or 2 persons): This will fix the dash crash, and the random / shackled beast vaper crashes.

There are some more UE5 issues to go next.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4473
Reviewed-by: lizzie <lizzie@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
This commit is contained in:
xbzk
2026-09-24 18:44:14 +02:00
committed by crueter
parent cb73a4dcc7
commit dbeb73ee01
4 changed files with 38 additions and 17 deletions
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src/video_core/dma_pusher.cpp
+10 -5
View File
@@ -16,7 +16,7 @@
namespace Tegra {
constexpr u32 MacroRegistersStart = 0xE00;
[[maybe_unused]] constexpr u32 ComputeInline = 0x6D;
constexpr u32 ComputeInline = 0x6D;
DmaPusher::DmaPusher(Core::System& system_, MemoryManager& memory_manager_, Control::ChannelState& channel_state_)
: system{system_}
@@ -73,11 +73,16 @@ bool DmaPusher::Step() {
synced = false;
}
if (header.size > 0 && dma_state.method >= MacroRegistersStart && subchannels[dma_state.subchannel]) {
subchannels[dma_state.subchannel]->current_dirty = memory_manager.IsMemoryDirty(dma_state.dma_get, header.size * sizeof(u32));
}
if (header.size > 0) {
if (subchannels[dma_state.subchannel] && dma_state.method_count) {
const auto engine = subchannel_type[dma_state.subchannel];
const bool kepler_payload = engine == Engines::EngineTypes::KeplerCompute && dma_state.method == ComputeInline && dma_state.non_incrementing;
const bool macro_payload = engine == Engines::EngineTypes::Maxwell3D && dma_state.method >= MacroRegistersStart;
if (kepler_payload || macro_payload) {
const size_t words = std::min<size_t>(dma_state.method_count, header.size);
subchannels[dma_state.subchannel]->current_dirty = memory_manager.IsMemoryDirty(dma_state.dma_get, words * sizeof(u32));
}
}
const bool use_safe = Settings::IsDMALevelDefault() ? Settings::IsGPULevelHigh() : Settings::IsDMALevelSafe();
if (use_safe) {
Tegra::Memory::GpuGuestMemory<Tegra::CommandHeader, Tegra::Memory::GuestMemoryFlags::SafeRead>headers(memory_manager, dma_state.dma_get, header.size, &command_headers);