From b2b07abbc84bac7070f720d059cfd5bcd02c1e05 Mon Sep 17 00:00:00 2001
From: CamilleLaVey <camillelavey99@gmail.com>
Date: Tue, 10 Mar 2026 03:10:37 -0400
Subject: [PATCH] Revert "[nce] Added "tainted" page fault handling inside dual
 channel"

---
 src/core/arm/nce/arm_nce.cpp | 14 --------------
 src/core/arm/nce/arm_nce.h   | 10 ----------
 2 files changed, 24 deletions(-)

diff --git a/src/core/arm/nce/arm_nce.cpp b/src/core/arm/nce/arm_nce.cpp
index 57f19e169d..4b1200887f 100644
--- a/src/core/arm/nce/arm_nce.cpp
+++ b/src/core/arm/nce/arm_nce.cpp
@@ -159,7 +159,6 @@ bool ArmNce::HandleGuestAlignmentFault(GuestContext* guest_ctx, void* raw_info,
 
 bool ArmNce::HandleGuestAccessFault(GuestContext* guest_ctx, void* raw_info, void* raw_context) {
     auto* info = static_cast<siginfo_t*>(raw_info);
-    auto* parent = guest_ctx->parent;
 
     // Try to handle an invalid access.
     // TODO: handle accesses which split a page?
@@ -183,19 +182,6 @@ void ArmNce::HandleHostAccessFault(int sig, void* raw_info, void* raw_context) {
     return g_orig_segv_action.sa_sigaction(sig, static_cast<siginfo_t*>(raw_info), raw_context);
 }
 
-bool ArmNce::IsPreciseAccessPage(u64 addr) const {
-    const std::scoped_lock lk{m_precise_pages_guard};
-    return m_precise_pages.contains(AlignDownPage(addr));
-}
-
-void ArmNce::MarkPreciseAccessPage(u64 addr) {
-    const std::scoped_lock lk{m_precise_pages_guard};
-    if (m_precise_pages.size() >= MaxPreciseAccessPages) {
-        m_precise_pages.clear();
-    }
-    m_precise_pages.insert(AlignDownPage(addr));
-}
-
 void ArmNce::LockThread(Kernel::KThread* thread) {
     auto* thread_params = &thread->GetNativeExecutionParameters();
     LockThreadParameters(thread_params);
diff --git a/src/core/arm/nce/arm_nce.h b/src/core/arm/nce/arm_nce.h
index 32772d9694..98dffd57d6 100644
--- a/src/core/arm/nce/arm_nce.h
+++ b/src/core/arm/nce/arm_nce.h
@@ -1,13 +1,9 @@
-// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
-// SPDX-License-Identifier: GPL-3.0-or-later
-
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 
 #include <mutex>
-#include <unordered_set>
 
 #include "core/arm/arm_interface.h"
 #include "core/arm/nce/guest_context.h"
@@ -82,9 +78,6 @@ private:
     static void HandleHostAlignmentFault(int sig, void* info, void* raw_context);
     static void HandleHostAccessFault(int sig, void* info, void* raw_context);
 
-    bool IsPreciseAccessPage(u64 addr) const;
-    void MarkPreciseAccessPage(u64 addr);
-
 public:
     Core::System& m_system;
 
@@ -96,9 +89,6 @@ public:
     GuestContext m_guest_ctx{};
     Kernel::KThread* m_running_thread{};
 
-    mutable std::mutex m_precise_pages_guard{};
-    std::unordered_set<u64> m_precise_pages{};
-
     // Stack for signal processing.
     std::unique_ptr<u8[]> m_stack{};
 };