simplify 2

Signed-off-by: lizzie <lizzie@eden-emu.dev>

src/core/cpu_manager.cpp

@@ -26,15 +26,42 @@ CpuManager::~CpuManager() = default;
 void CpuManager::Initialize() {
     num_cores = is_multicore ? Core::Hardware::NUM_CPU_CORES : 1;
     gpu_barrier = std::make_unique<Common::Barrier>(num_cores + 1);
-    for (std::size_t core = 0; core < num_cores; core++)
-        core_data[core].host_thread = std::jthread([this, core](std::stop_token token) { RunThread(token, core); });
+    for (std::size_t core = 0; core < num_cores; core++) {
+        core_data[core].host_thread = std::jthread([this, core](std::stop_token token) {
+            // Initialization
+            system.RegisterCoreThread(core);
+            Common::SetCurrentThreadName(("CPUCore_" + std::to_string(core)).c_str());
+            Common::SetCurrentThreadPriority(Common::ThreadPriority::Critical);
+#ifdef __ANDROID__
+            // Aimed specifically for Snapdragon 8 Elite devices
+            // This kills performance on desktop, but boosts perf for UMA devices
+            // like the S8E. Mediatek and Mali likely won't suffer.
+            Common::PinCurrentThreadToPerformanceCore(core);
+#endif
+            auto& data = core_data[core];
+            data.host_context = Common::Fiber::ThreadToFiber();
+            // Running
+            if (gpu_barrier->Sync(token)) {
+                if (!is_async_gpu && !is_multicore) {
+                    system.GPU().ObtainContext();
+                }
+                auto& kernel = system.Kernel();
+                auto& scheduler = *kernel.CurrentScheduler();
+                auto* thread = scheduler.GetSchedulerCurrentThread();
+                Kernel::SetCurrentThread(kernel, thread);
+                Common::Fiber::YieldTo(data.host_context, *thread->GetHostContext());
+            }
+            // Cleanup
+            data.host_context->Exit();
+        });
+    }
 }
 
 void CpuManager::Shutdown() {
-    for (std::size_t core = 0; core < num_cores; core++) {
-        if (core_data[core].host_thread.joinable()) {
-            core_data[core].host_thread.request_stop();
-            core_data[core].host_thread.join();
+    for (auto it = core_data.begin(); it != core_data.end(); ++it) {
+        if (it->host_thread.joinable()) {
+            it->host_thread.request_stop();
+            it->host_thread.join();
         }
     }
 }
@@ -77,12 +104,10 @@ void CpuManager::MultiCoreRunGuestThread() {
     kernel.CurrentScheduler()->OnThreadStart();
 
     while (true) {
-        auto* physical_core = &kernel.CurrentPhysicalCore();
-        while (!physical_core->IsInterrupted()) {
-            physical_core->RunThread(thread);
-            physical_core = &kernel.CurrentPhysicalCore();
+        auto& physical_core = kernel.CurrentPhysicalCore();
+        while (!physical_core.IsInterrupted()) {
+            physical_core.RunThread(thread);
         }
-
         HandleInterrupt();
     }
 }
@@ -183,41 +208,4 @@ void CpuManager::ShutdownThread() {
     UNREACHABLE();
 }
 
-void CpuManager::RunThread(std::stop_token token, std::size_t core) {
-    /// Initialization
-    system.RegisterCoreThread(core);
-    std::string name = is_multicore ? ("CPUCore_" + std::to_string(core)) : std::string{"CPUThread"};
-    Common::SetCurrentThreadName(name.c_str());
-    Common::SetCurrentThreadPriority(Common::ThreadPriority::Critical);
-#ifdef __ANDROID__
-    // Aimed specifically for Snapdragon 8 Elite devices
-    // This kills performance on desktop, but boosts perf for UMA devices
-    // like the S8E. Mediatek and Mali likely won't suffer.
-    Common::PinCurrentThreadToPerformanceCore(core);
-#endif
-    auto& data = core_data[core];
-    data.host_context = Common::Fiber::ThreadToFiber();
-
-    // Cleanup
-    SCOPE_EXIT {
-        data.host_context->Exit();
-    };
-
-    // Running
-    if (!gpu_barrier->Sync(token)) {
-        return;
-    }
-
-    if (!is_async_gpu && !is_multicore) {
-        system.GPU().ObtainContext();
-    }
-
-    auto& kernel = system.Kernel();
-    auto& scheduler = *kernel.CurrentScheduler();
-    auto* thread = scheduler.GetSchedulerCurrentThread();
-    Kernel::SetCurrentThread(kernel, thread);
-
-    Common::Fiber::YieldTo(data.host_context, *thread->GetHostContext());
-}
-
 } // namespace Core

src/core/cpu_manager.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -84,7 +87,6 @@ private:
     void GuestActivate();
     void HandleInterrupt();
     void ShutdownThread();
-    void RunThread(std::stop_token stop_token, std::size_t core);
 
     struct CoreData {
         std::shared_ptr<Common::Fiber> host_context;

src/core/hle/kernel/kernel.cpp

@@ -170,9 +170,6 @@ struct KernelCore::Impl {
             schedulers[core_id].reset();
         }
 
-        // Next host thead ID to use, 0-3 IDs represent core threads, >3 represent others
-        next_host_thread_id = Core::Hardware::NUM_CPU_CORES;
-
         // Close kernel objects that were not freed on shutdown
         {
             std::scoped_lock lk{registered_in_use_objects_lock};
@@ -355,22 +352,6 @@ struct KernelCore::Impl {
         application_process->Open();
     }
 
-    /// Sets the host thread ID for the caller.
-    u32 SetHostThreadId(std::size_t core_id) {
-        // This should only be called during core init.
-        ASSERT(tls_data.host_thread_id == UINT8_MAX);
-
-        // The first four slots are reserved for CPU core threads
-        ASSERT(core_id < Core::Hardware::NUM_CPU_CORES);
-        tls_data.host_thread_id = u8(core_id);
-        return tls_data.host_thread_id;
-    }
-
-    /// Gets the host thread ID for the caller
-    u32 GetHostThreadId() const {
-        return tls_data.host_thread_id;
-    }
-
     // Gets the dummy KThread for the caller, allocating a new one if this is the first time
     KThread* GetHostDummyThread(KThread* existing_thread) {
         if (tls_data.thread == nullptr) {
@@ -386,9 +367,12 @@ struct KernelCore::Impl {
     }
 
     /// Registers a CPU core thread by allocating a host thread ID for it
-    void RegisterCoreThread(std::size_t core_id) {
+    void RegisterCoreThread(std::size_t core_id) noexcept {
+        // This should only be called during core init.
+        ASSERT(tls_data.host_thread_id == UINT8_MAX);
+        // The first four slots are reserved for CPU core threads
         ASSERT(core_id < Core::Hardware::NUM_CPU_CORES);
-        const auto this_id = SetHostThreadId(core_id);
+        const auto this_id = tls_data.host_thread_id = u8(core_id);
         if (!is_multicore)
             single_core_thread_id = this_id;
     }
@@ -398,8 +382,8 @@ struct KernelCore::Impl {
         (void)GetHostDummyThread(existing_thread);
     }
 
-    [[nodiscard]] u32 GetCurrentHostThreadID() {
-        auto const this_id = GetHostThreadId();
+    [[nodiscard]] inline u32 GetCurrentHostThreadID() noexcept {
+        auto const this_id = tls_data.host_thread_id;
         if (!is_multicore && single_core_thread_id == this_id)
             return u32(system.GetCpuManager().CurrentCore());
         return this_id;
@@ -794,9 +778,6 @@ struct KernelCore::Impl {
 
     std::array<std::optional<Kernel::PhysicalCore>, Core::Hardware::NUM_CPU_CORES> cores;
 
-    // Next host thead ID to use, 0-3 IDs represent core threads, >3 represent others
-    std::atomic<u32> next_host_thread_id{Core::Hardware::NUM_CPU_CORES};
-
     // Kernel memory management
     std::optional<KMemoryManager> memory_manager;
 
@@ -930,11 +911,7 @@ const Kernel::PhysicalCore& KernelCore::PhysicalCore(std::size_t id) const {
 }
 
 size_t KernelCore::CurrentPhysicalCoreIndex() const {
-    const u32 core_id = impl->GetCurrentHostThreadID();
-    if (core_id >= Core::Hardware::NUM_CPU_CORES) {
-        return Core::Hardware::NUM_CPU_CORES - 1;
-    }
-    return core_id;
+    return impl->GetCurrentHostThreadID();
 }
 
 Kernel::PhysicalCore& KernelCore::CurrentPhysicalCore() {

src/core/hle/kernel/physical_core.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
@@ -119,10 +119,9 @@ void PhysicalCore::RunThread(Kernel::KThread* thread) {
 
         // Since scheduling may occur here, we cannot use any cached
         // state after returning from calls we make.
-
-        // Notify the debugger and go to sleep if a breakpoint was hit,
-        // or if the thread is unable to continue for any reason.
         if (breakpoint || (prefetch_abort && may_abort)) {
+            // Notify the debugger and go to sleep if a breakpoint was hit,
+            // or if the thread is unable to continue for any reason.
             if (breakpoint) {
                 interface->RewindBreakpointInstruction();
             }
@@ -133,26 +132,19 @@ void PhysicalCore::RunThread(Kernel::KThread* thread) {
             }
             thread->RequestSuspend(SuspendType::Debug);
             return;
-        }
-
-        // Notify the debugger and go to sleep on data abort.
-        if (data_abort) {
+        } else if (data_abort) {
+            // Notify the debugger and go to sleep on data abort.
             if (system.DebuggerEnabled()) {
                 system.GetDebugger().NotifyThreadWatchpoint(thread, *interface->HaltedWatchpoint());
             }
             thread->RequestSuspend(SuspendType::Debug);
             return;
-        }
-
-        // Handle system calls.
-        if (supervisor_call) {
-            // Perform call.
+        } else if (supervisor_call) {
+            // Handle system calls: Perform call.
             Svc::Call(system, interface->GetSvcNumber());
             return;
-        }
-
-        // Handle external interrupt sources.
-        if (interrupt || m_is_single_core) {
+        } else if (interrupt || m_is_single_core) {
+            // Handle external interrupt sources.
             return;
         }
     }
@@ -160,16 +152,14 @@ void PhysicalCore::RunThread(Kernel::KThread* thread) {
 
 void PhysicalCore::LoadContext(const KThread* thread) {
     auto* const process = thread->GetOwnerProcess();
-    if (!process) {
+    if (process) {
         // Kernel threads do not run on emulated CPU cores.
-        return;
-    }
-
-    auto* interface = process->GetArmInterface(m_core_index);
-    if (interface) {
-        interface->SetContext(thread->GetContext());
-        interface->SetTpidrroEl0(GetInteger(thread->GetTlsAddress()));
-        interface->SetWatchpointArray(&process->GetWatchpoints());
+        auto* interface = process->GetArmInterface(m_core_index);
+        if (interface) {
+            interface->SetContext(thread->GetContext());
+            interface->SetTpidrroEl0(GetInteger(thread->GetTlsAddress()));
+            interface->SetWatchpointArray(&process->GetWatchpoints());
+        }
     }
 }
 
@@ -179,14 +169,12 @@ void PhysicalCore::LoadSvcArguments(const KProcess& process, std::span<const uin
 
 void PhysicalCore::SaveContext(KThread* thread) const {
     auto* const process = thread->GetOwnerProcess();
-    if (!process) {
+    if (process) {
         // Kernel threads do not run on emulated CPU cores.
-        return;
-    }
-
-    auto* interface = process->GetArmInterface(m_core_index);
-    if (interface) {
-        interface->GetContext(thread->GetContext());
+        auto* interface = process->GetArmInterface(m_core_index);
+        if (interface) {
+            interface->GetContext(thread->GetContext());
+        }
     }
 }
 
@@ -206,13 +194,11 @@ void PhysicalCore::CloneFpuStatus(KThread* dst) const {
 
 void PhysicalCore::LogBacktrace() {
     auto* process = GetCurrentProcessPointer(m_kernel);
-    if (!process) {
-        return;
-    }
-
-    auto* interface = process->GetArmInterface(m_core_index);
-    if (interface) {
-        interface->LogBacktrace(process);
+    if (process) {
+        auto* interface = process->GetArmInterface(m_core_index);
+        if (interface) {
+            interface->LogBacktrace(process);
+        }
     }
 }
 
@@ -221,7 +207,7 @@ void PhysicalCore::Idle() {
     m_on_interrupt.wait(lk, [this] { return m_is_interrupted; });
 }
 
-bool PhysicalCore::IsInterrupted() const {
+[[noinline]] bool PhysicalCore::IsInterrupted() const {
     return m_is_interrupted;
 }
 
@@ -240,12 +226,10 @@ void PhysicalCore::Interrupt() {
     m_on_interrupt.notify_one();
 
     // If there is no thread running, we are done.
-    if (arm_interface == nullptr) {
-        return;
+    if (arm_interface != nullptr) {
+        // Interrupt the CPU.
+        arm_interface->SignalInterrupt(thread);
     }
-
-    // Interrupt the CPU.
-    arm_interface->SignalInterrupt(thread);
 }
 
 void PhysicalCore::ClearInterrupt() {

src/dynarmic/src/dynarmic/backend/arm64/a32_interface.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 /* This file is part of the dynarmic project.
@@ -32,45 +32,31 @@ struct Jit::Impl final {
             , core(conf) {}
 
     HaltReason Run() {
-        ASSERT(!jit_interface->is_executing);
-        PerformRequestedCacheInvalidation(static_cast<HaltReason>(Atomic::Load(&halt_reason)));
-
-        jit_interface->is_executing = true;
-        SCOPE_EXIT {
-            jit_interface->is_executing = false;
-        };
-
+        ASSERT(!is_executing);
+        PerformRequestedCacheInvalidation(HaltReason(Atomic::Load(&halt_reason)));
+        is_executing = true;
         HaltReason hr = core.Run(current_address_space, current_state, &halt_reason);
-
         PerformRequestedCacheInvalidation(hr);
-
+        is_executing = false;
         return hr;
     }
 
     HaltReason Step() {
-        ASSERT(!jit_interface->is_executing);
-        PerformRequestedCacheInvalidation(static_cast<HaltReason>(Atomic::Load(&halt_reason)));
-
-        jit_interface->is_executing = true;
-        SCOPE_EXIT {
-            jit_interface->is_executing = false;
-        };
-
+        ASSERT(!is_executing);
+        PerformRequestedCacheInvalidation(HaltReason(Atomic::Load(&halt_reason)));
+        is_executing = true;
         HaltReason hr = core.Step(current_address_space, current_state, &halt_reason);
-
         PerformRequestedCacheInvalidation(hr);
-
+        is_executing = false;
         return hr;
     }
 
     void ClearCache() {
-        std::unique_lock lock{invalidation_mutex};
         invalidate_entire_cache = true;
         HaltExecution(HaltReason::CacheInvalidation);
     }
 
     void InvalidateCacheRange(std::uint32_t start_address, std::size_t length) {
-        std::unique_lock lock{invalidation_mutex};
         invalid_cache_ranges.add(boost::icl::discrete_interval<u32>::closed(start_address, static_cast<u32>(start_address + length - 1)));
         HaltExecution(HaltReason::CacheInvalidation);
     }
@@ -80,12 +66,12 @@ struct Jit::Impl final {
     }
 
     void HaltExecution(HaltReason hr) {
-        Atomic::Or(&halt_reason, static_cast<u32>(hr));
+        Atomic::Or(&halt_reason, u32(hr));
         Atomic::Barrier();
     }
 
     void ClearHalt(HaltReason hr) {
-        Atomic::And(&halt_reason, ~static_cast<u32>(hr));
+        Atomic::And(&halt_reason, ~u32(hr));
         Atomic::Barrier();
     }
 
@@ -132,21 +118,15 @@ struct Jit::Impl final {
 private:
     void PerformRequestedCacheInvalidation(HaltReason hr) {
         if (Has(hr, HaltReason::CacheInvalidation)) {
-            std::unique_lock lock{invalidation_mutex};
-
             ClearHalt(HaltReason::CacheInvalidation);
-
             if (invalidate_entire_cache) {
                 current_address_space.ClearCache();
-
                 invalidate_entire_cache = false;
                 invalid_cache_ranges.clear();
                 return;
             }
-
             if (!invalid_cache_ranges.empty()) {
                 current_address_space.InvalidateCacheRanges(invalid_cache_ranges);
-
                 invalid_cache_ranges.clear();
                 return;
             }
@@ -160,10 +140,9 @@ private:
     A32Core core;
 
     volatile u32 halt_reason = 0;
-
-    std::mutex invalidation_mutex;
     boost::icl::interval_set<u32> invalid_cache_ranges;
     bool invalidate_entire_cache = false;
+    bool is_executing = false;
 };
 
 Jit::Jit(UserConfig conf)

src/dynarmic/src/dynarmic/backend/arm64/a64_interface.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 /* This file is part of the dynarmic project.
@@ -27,50 +27,37 @@ using namespace Backend::Arm64;
 
 struct Jit::Impl final {
     Impl(Jit*, A64::UserConfig conf)
-            : conf(conf)
-            , current_address_space(conf)
-            , core(conf) {}
+        : conf(conf)
+        , current_address_space(conf)
+        , core(conf)
+    {}
 
     HaltReason Run() {
         ASSERT(!is_executing);
-        PerformRequestedCacheInvalidation(static_cast<HaltReason>(Atomic::Load(&halt_reason)));
-
         is_executing = true;
-        SCOPE_EXIT {
-            is_executing = false;
-        };
-
+        PerformRequestedCacheInvalidation(HaltReason(Atomic::Load(&halt_reason)));
         HaltReason hr = core.Run(current_address_space, current_state, &halt_reason);
-
         PerformRequestedCacheInvalidation(hr);
-
+        is_executing = false;
         return hr;
     }
 
     HaltReason Step() {
         ASSERT(!is_executing);
-        PerformRequestedCacheInvalidation(static_cast<HaltReason>(Atomic::Load(&halt_reason)));
-
         is_executing = true;
-        SCOPE_EXIT {
-            is_executing = false;
-        };
-
+        PerformRequestedCacheInvalidation(HaltReason(Atomic::Load(&halt_reason)));
         HaltReason hr = core.Step(current_address_space, current_state, &halt_reason);
-
         PerformRequestedCacheInvalidation(hr);
-
+        is_executing = false;
         return hr;
     }
 
     void ClearCache() {
-        std::unique_lock lock{invalidation_mutex};
         invalidate_entire_cache = true;
         HaltExecution(HaltReason::CacheInvalidation);
     }
 
     void InvalidateCacheRange(std::uint64_t start_address, std::size_t length) {
-        std::unique_lock lock{invalidation_mutex};
         invalid_cache_ranges.add(boost::icl::discrete_interval<u64>::closed(start_address, start_address + length - 1));
         HaltExecution(HaltReason::CacheInvalidation);
     }
@@ -80,11 +67,13 @@ struct Jit::Impl final {
     }
 
     void HaltExecution(HaltReason hr) {
-        Atomic::Or(&halt_reason, static_cast<u32>(hr));
+        Atomic::Or(&halt_reason, u32(hr));
+        Atomic::Barrier();
     }
 
     void ClearHalt(HaltReason hr) {
-        Atomic::And(&halt_reason, ~static_cast<u32>(hr));
+        Atomic::And(&halt_reason, ~u32(hr));
+        Atomic::Barrier();
     }
 
     std::uint64_t PC() const {
@@ -147,10 +136,6 @@ struct Jit::Impl final {
         current_state.exclusive_state = false;
     }
 
-    bool IsExecuting() const {
-        return is_executing;
-    }
-
     std::string Disassemble() const {
         return {};
     }
@@ -158,21 +143,15 @@ struct Jit::Impl final {
 private:
     void PerformRequestedCacheInvalidation(HaltReason hr) {
         if (Has(hr, HaltReason::CacheInvalidation)) {
-            std::unique_lock lock{invalidation_mutex};
-
             ClearHalt(HaltReason::CacheInvalidation);
-
             if (invalidate_entire_cache) {
                 current_address_space.ClearCache();
-
                 invalidate_entire_cache = false;
                 invalid_cache_ranges.clear();
                 return;
             }
-
             if (!invalid_cache_ranges.empty()) {
                 current_address_space.InvalidateCacheRanges(invalid_cache_ranges);
-
                 invalid_cache_ranges.clear();
                 return;
             }
@@ -185,8 +164,6 @@ private:
     A64Core core;
 
     volatile u32 halt_reason = 0;
-
-    std::mutex invalidation_mutex;
     boost::icl::interval_set<u64> invalid_cache_ranges;
     bool invalidate_entire_cache = false;
     bool is_executing = false;
@@ -307,10 +284,6 @@ void Jit::ClearExclusiveState() {
     impl->ClearExclusiveState();
 }
 
-bool Jit::IsExecuting() const {
-    return impl->IsExecuting();
-}
-
 std::string Jit::Disassemble() const {
     return impl->Disassemble();
 }

src/dynarmic/src/dynarmic/backend/riscv64/a32_interface.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 /* This file is part of the dynarmic project.
@@ -32,41 +32,29 @@ struct Jit::Impl final {
             , core(conf) {}
 
     HaltReason Run() {
-        ASSERT(!jit_interface->is_executing);
-        jit_interface->is_executing = true;
-        SCOPE_EXIT {
-            jit_interface->is_executing = false;
-        };
-
+        ASSERT(!is_executing);
+        is_executing = true;
         HaltReason hr = core.Run(current_address_space, current_state, &halt_reason);
-
         RequestCacheInvalidation();
-
+        is_executing = false;
         return hr;
     }
 
     HaltReason Step() {
-        ASSERT(!jit_interface->is_executing);
-        jit_interface->is_executing = true;
-        SCOPE_EXIT {
-            jit_interface->is_executing = false;
-        };
-
+        ASSERT(!is_executing);
+        is_executing = true;
         UNIMPLEMENTED();
-
         RequestCacheInvalidation();
-
+        is_executing = false;
         return HaltReason{};
     }
 
     void ClearCache() {
-        std::unique_lock lock{invalidation_mutex};
         invalidate_entire_cache = true;
         HaltExecution(HaltReason::CacheInvalidation);
     }
 
     void InvalidateCacheRange(u32 start_address, size_t length) {
-        std::unique_lock lock{invalidation_mutex};
         invalid_cache_ranges.add(boost::icl::discrete_interval<u32>::closed(start_address, static_cast<u32>(start_address + length - 1)));
         HaltExecution(HaltReason::CacheInvalidation);
     }
@@ -132,12 +120,10 @@ private:
     A32JitState current_state{};
     A32AddressSpace current_address_space;
     A32Core core;
-
     volatile u32 halt_reason = 0;
-
-    std::mutex invalidation_mutex;
     boost::icl::interval_set<u32> invalid_cache_ranges;
     bool invalidate_entire_cache = false;
+    bool is_executing = false;
 };
 
 Jit::Jit(UserConfig conf)

src/dynarmic/src/dynarmic/backend/x64/a32_interface.cpp

@@ -75,14 +75,9 @@ struct Jit::Impl {
     ~Impl() = default;
 
     HaltReason Run() {
-        ASSERT(!jit_interface->is_executing);
+        ASSERT(!is_executing);
         PerformRequestedCacheInvalidation(static_cast<HaltReason>(Atomic::Load(&jit_state.halt_reason)));
-
-        jit_interface->is_executing = true;
-        SCOPE_EXIT {
-            jit_interface->is_executing = false;
-        };
-
+        is_executing = true;
         const CodePtr current_codeptr = [this] {
             // RSB optimization
             const u32 new_rsb_ptr = (jit_state.rsb_ptr - 1) & A32JitState::RSBPtrMask;
@@ -93,53 +88,45 @@ struct Jit::Impl {
 
             return GetCurrentBlock();
         }();
-
         const HaltReason hr = block_of_code.RunCode(&jit_state, current_codeptr);
-
         PerformRequestedCacheInvalidation(hr);
-
+        is_executing = false;
         return hr;
     }
 
     HaltReason Step() {
-        ASSERT(!jit_interface->is_executing);
-        PerformRequestedCacheInvalidation(static_cast<HaltReason>(Atomic::Load(&jit_state.halt_reason)));
-
-        jit_interface->is_executing = true;
-        SCOPE_EXIT {
-            jit_interface->is_executing = false;
-        };
-
+        ASSERT(!is_executing);
+        PerformRequestedCacheInvalidation(HaltReason(Atomic::Load(&jit_state.halt_reason)));
+        is_executing = true;
         const HaltReason hr = block_of_code.StepCode(&jit_state, GetCurrentSingleStep());
-
         PerformRequestedCacheInvalidation(hr);
-
+        is_executing = false;
         return hr;
     }
 
     void ClearCache() {
-        std::unique_lock lock{invalidation_mutex};
         invalidate_entire_cache = true;
         HaltExecution(HaltReason::CacheInvalidation);
     }
 
     void InvalidateCacheRange(std::uint32_t start_address, std::size_t length) {
-        std::unique_lock lock{invalidation_mutex};
-        invalid_cache_ranges.add(boost::icl::discrete_interval<u32>::closed(start_address, static_cast<u32>(start_address + length - 1)));
+        invalid_cache_ranges.add(boost::icl::discrete_interval<u32>::closed(start_address, u32(start_address + length - 1)));
         HaltExecution(HaltReason::CacheInvalidation);
     }
 
     void Reset() {
-        ASSERT(!jit_interface->is_executing);
+        ASSERT(!is_executing);
         jit_state = {};
     }
 
     void HaltExecution(HaltReason hr) {
-        Atomic::Or(&jit_state.halt_reason, static_cast<u32>(hr));
+        Atomic::Or(&jit_state.halt_reason, u32(hr));
+        Atomic::Barrier();
     }
 
     void ClearHalt(HaltReason hr) {
-        Atomic::And(&jit_state.halt_reason, ~static_cast<u32>(hr));
+        Atomic::And(&jit_state.halt_reason, ~u32(hr));
+        Atomic::Barrier();
     }
 
     void ClearExclusiveState() {
@@ -223,14 +210,10 @@ private:
 
     void PerformRequestedCacheInvalidation(HaltReason hr) {
         if (Has(hr, HaltReason::CacheInvalidation)) {
-            std::unique_lock lock{invalidation_mutex};
-
             ClearHalt(HaltReason::CacheInvalidation);
-
             if (!invalidate_entire_cache && invalid_cache_ranges.empty()) {
                 return;
             }
-
             jit_state.ResetRSB();
             if (invalidate_entire_cache) {
                 block_of_code.ClearCache();
@@ -251,11 +234,10 @@ private:
     // Keep it here, you don't wanna mess with the fuckery that's initializer lists
     const A32::UserConfig conf;
     Jit* jit_interface;
-
     // Requests made during execution to invalidate the cache are queued up here.
-    bool invalidate_entire_cache = false;
     boost::icl::interval_set<u32> invalid_cache_ranges;
-    std::mutex invalidation_mutex;
+    bool invalidate_entire_cache = false;
+    bool is_executing = false;
 };
 
 Jit::Jit(UserConfig conf)

src/dynarmic/src/dynarmic/backend/x64/a64_interface.cpp

@@ -75,14 +75,8 @@ public:
     HaltReason Run() {
         ASSERT(!is_executing);
         PerformRequestedCacheInvalidation(static_cast<HaltReason>(Atomic::Load(&jit_state.halt_reason)));
-
         is_executing = true;
-        SCOPE_EXIT {
-            this->is_executing = false;
-        };
-
         // TODO: Check code alignment
-
         const CodePtr current_code_ptr = [this] {
             // RSB optimization
             const u32 new_rsb_ptr = (jit_state.rsb_ptr - 1) & A64JitState::RSBPtrMask;
@@ -94,37 +88,28 @@ public:
         }();
 
         const HaltReason hr = block_of_code.RunCode(&jit_state, current_code_ptr);
-
         PerformRequestedCacheInvalidation(hr);
-
+        is_executing = false;
         return hr;
     }
 
     HaltReason Step() {
         ASSERT(!is_executing);
-        PerformRequestedCacheInvalidation(static_cast<HaltReason>(Atomic::Load(&jit_state.halt_reason)));
-
+        PerformRequestedCacheInvalidation(HaltReason(Atomic::Load(&jit_state.halt_reason)));
         is_executing = true;
-        SCOPE_EXIT {
-            this->is_executing = false;
-        };
-
         const HaltReason hr = block_of_code.StepCode(&jit_state, GetCurrentSingleStep());
-
         PerformRequestedCacheInvalidation(hr);
-
+        is_executing = false;
         return hr;
     }
 
     void ClearCache() {
-        std::unique_lock lock{invalidation_mutex};
         invalidate_entire_cache = true;
         HaltExecution(HaltReason::CacheInvalidation);
     }
 
     void InvalidateCacheRange(u64 start_address, size_t length) {
-        std::unique_lock lock{invalidation_mutex};
-        const auto end_address = static_cast<u64>(start_address + length - 1);
+        const auto end_address = u64(start_address + length - 1);
         const auto range = boost::icl::discrete_interval<u64>::closed(start_address, end_address);
         invalid_cache_ranges.add(range);
         HaltExecution(HaltReason::CacheInvalidation);
@@ -136,11 +121,13 @@ public:
     }
 
     void HaltExecution(HaltReason hr) {
-        Atomic::Or(&jit_state.halt_reason, static_cast<u32>(hr));
+        Atomic::Or(&jit_state.halt_reason, u32(hr));
+        Atomic::Barrier();
     }
 
     void ClearHalt(HaltReason hr) {
-        Atomic::And(&jit_state.halt_reason, ~static_cast<u32>(hr));
+        Atomic::And(&jit_state.halt_reason, ~u32(hr));
+        Atomic::Barrier();
     }
 
     u64 GetSP() const {
@@ -228,10 +215,6 @@ public:
         jit_state.exclusive_state = 0;
     }
 
-    bool IsExecuting() const {
-        return is_executing;
-    }
-
     std::string Disassemble() const {
         const size_t size = reinterpret_cast<const char*>(block_of_code.getCurr()) - reinterpret_cast<const char*>(block_of_code.GetCodeBegin());
         auto const* p = reinterpret_cast<const char*>(block_of_code.GetCodeBegin());
@@ -280,14 +263,10 @@ private:
 
     void PerformRequestedCacheInvalidation(HaltReason hr) {
         if (Has(hr, HaltReason::CacheInvalidation)) {
-            std::unique_lock lock{invalidation_mutex};
-
             ClearHalt(HaltReason::CacheInvalidation);
-
             if (!invalidate_entire_cache && invalid_cache_ranges.empty()) {
                 return;
             }
-
             jit_state.ResetRSB();
             if (invalidate_entire_cache) {
                 block_of_code.ClearCache();
@@ -306,10 +285,9 @@ private:
     BlockOfCode block_of_code;
     A64EmitX64 emitter;
     Optimization::PolyfillOptions polyfill_options;
-    bool is_executing = false;
-    bool invalidate_entire_cache = false;
     boost::icl::interval_set<u64> invalid_cache_ranges;
-    std::mutex invalidation_mutex;
+    bool invalidate_entire_cache = false;
+    bool is_executing = false;
 };
 
 Jit::Jit(UserConfig conf)
@@ -421,10 +399,6 @@ void Jit::ClearExclusiveState() {
     impl->ClearExclusiveState();
 }
 
-bool Jit::IsExecuting() const {
-    return impl->IsExecuting();
-}
-
 std::string Jit::Disassemble() const {
     return impl->Disassemble();
 }

src/dynarmic/src/dynarmic/interface/A32/a32.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 /* This file is part of the dynarmic project.
@@ -84,21 +84,11 @@ public:
     /// Clears exclusive state for this core.
     void ClearExclusiveState();
 
-    /**
-     * Returns true if Jit::Run was called but hasn't returned yet.
-     * i.e.: We're in a callback.
-     */
-    bool IsExecuting() const {
-        return is_executing;
-    }
-
     /// @brief Disassemble the instructions following the current pc and return
     /// the resulting instructions as a vector of their string representations.
     std::string Disassemble() const;
 
 private:
-    bool is_executing = false;
-
     struct Impl;
     std::unique_ptr<Impl> impl;
 };

src/dynarmic/src/dynarmic/interface/A64/a64.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 /* This file is part of the dynarmic project.
@@ -116,12 +116,6 @@ public:
     /// Clears exclusive state for this core.
     void ClearExclusiveState();
 
-    /**
-     * Returns true if Jit::Run was called but hasn't returned yet.
-     * i.e.: We're in a callback.
-     */
-    bool IsExecuting() const;
-
     /// @brief Disassemble the instructions following the current pc and return
     /// the resulting instructions as a vector of their string representations.
     std::string Disassemble() const;