core: use the 12 GiB layout and auto-stub IPC for Switch 2 titles

Switch 2 titles size their heap from the total memory and stop at the
first unimplemented command, so they only booted with the 12 GiB layout
and EDEN_NX2_AUTO_STUB set by hand. Detect them from main.npdm before the
kernel starts and apply the layout as a per-game value (the configured
layout comes back once the game is closed), and auto-stub unknown
commands from Switch 2 processes.

1 files changed, 5 insertions, 2 deletions

diff --git a/src/core/hle/service/service.cpp b/src/core/hle/service/service.cpp
index 5a779af3ca..1490af0328 100644
--- a/src/core/hle/service/service.cpp
+++ b/src/core/hle/service/service.cpp
@@ -80,10 +80,13 @@ void ServiceFrameworkBase::ReportUnimplementedFunction(HLERequestContext& ctx,
 
     system.GetReporter().SaveUnimplementedFunctionReport(ctx, ctx.GetCommand(), function_name, service_name);
     UNIMPLEMENTED_MSG("Unknown / unimplemented {}", fmt::to_string(buf));
-    // EDEN_NX2_AUTO_STUB=1 auto-stubs every unknown command without touching the config.
+    // EDEN_NX2_AUTO_STUB=1 auto-stubs every unknown command without touching the config. Switch 2
+    // programs are always auto-stubbed: they still call many commands nobody has implemented.
     static const bool env_auto_stub = std::getenv("EDEN_NX2_AUTO_STUB") != nullptr;
+    const auto* const caller = ctx.GetThread().GetOwnerProcess();
     if (Settings::values.use_auto_stub || env_auto_stub ||
-        std::string_view{service_name}.starts_with(Nx2StubPrefix)) {
+        std::string_view{service_name}.starts_with(Nx2StubPrefix) ||
+        (caller != nullptr && caller->IsSwitch2())) {
         LOG_WARNING(Service, "Using auto stub fallback!");
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(ResultSuccess);