Merge pull request #8013 from bunnei/kernel-slab-rework-v2

Kernel Memory Updates (Part 6): Use guest memory for slab heaps & update TLS.

25 files changed, 711 insertions, 371 deletions

diff --git a/src/core/hle/kernel/hle_ipc.cpp b/src/core/hle/kernel/hle_ipc.cpp
index e19544c54..9f2175f82 100644
--- a/src/core/hle/kernel/hle_ipc.cpp
+++ b/src/core/hle/kernel/hle_ipc.cpp
@@ -45,7 +45,7 @@ bool SessionRequestManager::HasSessionRequestHandler(const HLERequestContext& co
             LOG_CRITICAL(IPC, "object_id {} is too big!", object_id);
             return false;
         }
-        return DomainHandler(object_id - 1) != nullptr;
+        return DomainHandler(object_id - 1).lock() != nullptr;
     } else {
         return session_handler != nullptr;
     }
@@ -53,9 +53,6 @@ bool SessionRequestManager::HasSessionRequestHandler(const HLERequestContext& co
 
 void SessionRequestHandler::ClientConnected(KServerSession* session) {
     session->ClientConnected(shared_from_this());
-
-    // Ensure our server session is tracked globally.
-    kernel.RegisterServerSession(session);
 }
 
 void SessionRequestHandler::ClientDisconnected(KServerSession* session) {
diff --git a/src/core/hle/kernel/hle_ipc.h b/src/core/hle/kernel/hle_ipc.h
index 754b41ff6..670cc741c 100644
--- a/src/core/hle/kernel/hle_ipc.h
+++ b/src/core/hle/kernel/hle_ipc.h
@@ -94,6 +94,7 @@ protected:
     std::weak_ptr<ServiceThread> service_thread;
 };
 
+using SessionRequestHandlerWeakPtr = std::weak_ptr<SessionRequestHandler>;
 using SessionRequestHandlerPtr = std::shared_ptr<SessionRequestHandler>;
 
 /**
@@ -139,7 +140,7 @@ public:
         }
     }
 
-    SessionRequestHandlerPtr DomainHandler(std::size_t index) const {
+    SessionRequestHandlerWeakPtr DomainHandler(std::size_t index) const {
         ASSERT_MSG(index < DomainHandlerCount(), "Unexpected handler index {}", index);
         return domain_handlers.at(index);
     }
@@ -328,10 +329,10 @@ public:
 
     template <typename T>
     std::shared_ptr<T> GetDomainHandler(std::size_t index) const {
-        return std::static_pointer_cast<T>(manager->DomainHandler(index));
+        return std::static_pointer_cast<T>(manager.lock()->DomainHandler(index).lock());
     }
 
-    void SetSessionRequestManager(std::shared_ptr<SessionRequestManager> manager_) {
+    void SetSessionRequestManager(std::weak_ptr<SessionRequestManager> manager_) {
         manager = std::move(manager_);
     }
 
@@ -374,7 +375,7 @@ private:
     u32 handles_offset{};
     u32 domain_offset{};
 
-    std::shared_ptr<SessionRequestManager> manager;
+    std::weak_ptr<SessionRequestManager> manager;
 
     KernelCore& kernel;
     Core::Memory::Memory& memory;
diff --git a/src/core/hle/kernel/init/init_slab_setup.cpp b/src/core/hle/kernel/init/init_slab_setup.cpp
index 36fc0944a..b0f773ee0 100644
--- a/src/core/hle/kernel/init/init_slab_setup.cpp
+++ b/src/core/hle/kernel/init/init_slab_setup.cpp
@@ -7,19 +7,23 @@
 #include "common/common_funcs.h"
 #include "common/common_types.h"
 #include "core/core.h"
+#include "core/device_memory.h"
 #include "core/hardware_properties.h"
 #include "core/hle/kernel/init/init_slab_setup.h"
 #include "core/hle/kernel/k_code_memory.h"
 #include "core/hle/kernel/k_event.h"
 #include "core/hle/kernel/k_memory_layout.h"
 #include "core/hle/kernel/k_memory_manager.h"
+#include "core/hle/kernel/k_page_buffer.h"
 #include "core/hle/kernel/k_port.h"
 #include "core/hle/kernel/k_process.h"
 #include "core/hle/kernel/k_resource_limit.h"
 #include "core/hle/kernel/k_session.h"
 #include "core/hle/kernel/k_shared_memory.h"
+#include "core/hle/kernel/k_shared_memory_info.h"
 #include "core/hle/kernel/k_system_control.h"
 #include "core/hle/kernel/k_thread.h"
+#include "core/hle/kernel/k_thread_local_page.h"
 #include "core/hle/kernel/k_transfer_memory.h"
 
 namespace Kernel::Init {
@@ -32,9 +36,13 @@ namespace Kernel::Init {
     HANDLER(KEvent, (SLAB_COUNT(KEvent)), ##__VA_ARGS__)                                           \
     HANDLER(KPort, (SLAB_COUNT(KPort)), ##__VA_ARGS__)                                             \
     HANDLER(KSharedMemory, (SLAB_COUNT(KSharedMemory)), ##__VA_ARGS__)                             \
+    HANDLER(KSharedMemoryInfo, (SLAB_COUNT(KSharedMemory) * 8), ##__VA_ARGS__)                     \
     HANDLER(KTransferMemory, (SLAB_COUNT(KTransferMemory)), ##__VA_ARGS__)                         \
     HANDLER(KCodeMemory, (SLAB_COUNT(KCodeMemory)), ##__VA_ARGS__)                                 \
     HANDLER(KSession, (SLAB_COUNT(KSession)), ##__VA_ARGS__)                                       \
+    HANDLER(KThreadLocalPage,                                                                      \
+            (SLAB_COUNT(KProcess) + (SLAB_COUNT(KProcess) + SLAB_COUNT(KThread)) / 8),             \
+            ##__VA_ARGS__)                                                                         \
     HANDLER(KResourceLimit, (SLAB_COUNT(KResourceLimit)), ##__VA_ARGS__)
 
 namespace {
@@ -50,38 +58,46 @@ enum KSlabType : u32 {
 // Constexpr counts.
 constexpr size_t SlabCountKProcess = 80;
 constexpr size_t SlabCountKThread = 800;
-constexpr size_t SlabCountKEvent = 700;
+constexpr size_t SlabCountKEvent = 900;
 constexpr size_t SlabCountKInterruptEvent = 100;
-constexpr size_t SlabCountKPort = 256 + 0x20; // Extra 0x20 ports over Nintendo for homebrew.
+constexpr size_t SlabCountKPort = 384;
 constexpr size_t SlabCountKSharedMemory = 80;
 constexpr size_t SlabCountKTransferMemory = 200;
 constexpr size_t SlabCountKCodeMemory = 10;
 constexpr size_t SlabCountKDeviceAddressSpace = 300;
-constexpr size_t SlabCountKSession = 933;
+constexpr size_t SlabCountKSession = 1133;
 constexpr size_t SlabCountKLightSession = 100;
 constexpr size_t SlabCountKObjectName = 7;
 constexpr size_t SlabCountKResourceLimit = 5;
 constexpr size_t SlabCountKDebug = Core::Hardware::NUM_CPU_CORES;
-constexpr size_t SlabCountKAlpha = 1;
-constexpr size_t SlabCountKBeta = 6;
+constexpr size_t SlabCountKIoPool = 1;
+constexpr size_t SlabCountKIoRegion = 6;
 
 constexpr size_t SlabCountExtraKThread = 160;
 
+/// Helper function to translate from the slab virtual address to the reserved location in physical
+/// memory.
+static PAddr TranslateSlabAddrToPhysical(KMemoryLayout& memory_layout, VAddr slab_addr) {
+    slab_addr -= memory_layout.GetSlabRegionAddress();
+    return slab_addr + Core::DramMemoryMap::SlabHeapBase;
+}
+
 template <typename T>
 VAddr InitializeSlabHeap(Core::System& system, KMemoryLayout& memory_layout, VAddr address,
                          size_t num_objects) {
-    // TODO(bunnei): This is just a place holder. We should initialize the appropriate KSlabHeap for
-    // kernel object type T with the backing kernel memory pointer once we emulate kernel memory.
 
     const size_t size = Common::AlignUp(sizeof(T) * num_objects, alignof(void*));
     VAddr start = Common::AlignUp(address, alignof(T));
 
-    // This is intentionally empty. Once KSlabHeap is fully implemented, we can replace this with
-    // the pointer to emulated memory to pass along. Until then, KSlabHeap will just allocate/free
-    // host memory.
-    void* backing_kernel_memory{};
+    // This should use the virtual memory address passed in, but currently, we do not setup the
+    // kernel virtual memory layout. Instead, we simply map these at a region of physical memory
+    // that we reserve for the slab heaps.
+    // TODO(bunnei): Fix this once we support the kernel virtual memory layout.
 
     if (size > 0) {
+        void* backing_kernel_memory{
+            system.DeviceMemory().GetPointer(TranslateSlabAddrToPhysical(memory_layout, start))};
+
         const KMemoryRegion* region = memory_layout.FindVirtual(start + size - 1);
         ASSERT(region != nullptr);
         ASSERT(region->IsDerivedFrom(KMemoryRegionType_KernelSlab));
@@ -91,6 +107,12 @@ VAddr InitializeSlabHeap(Core::System& system, KMemoryLayout& memory_layout, VAd
     return start + size;
 }
 
+size_t CalculateSlabHeapGapSize() {
+    constexpr size_t KernelSlabHeapGapSize = 2_MiB - 296_KiB;
+    static_assert(KernelSlabHeapGapSize <= KernelSlabHeapGapsSizeMax);
+    return KernelSlabHeapGapSize;
+}
+
 } // namespace
 
 KSlabResourceCounts KSlabResourceCounts::CreateDefault() {
@@ -109,8 +131,8 @@ KSlabResourceCounts KSlabResourceCounts::CreateDefault() {
         .num_KObjectName = SlabCountKObjectName,
         .num_KResourceLimit = SlabCountKResourceLimit,
         .num_KDebug = SlabCountKDebug,
-        .num_KAlpha = SlabCountKAlpha,
-        .num_KBeta = SlabCountKBeta,
+        .num_KIoPool = SlabCountKIoPool,
+        .num_KIoRegion = SlabCountKIoRegion,
     };
 }
 
@@ -136,11 +158,34 @@ size_t CalculateTotalSlabHeapSize(const KernelCore& kernel) {
 #undef ADD_SLAB_SIZE
 
     // Add the reserved size.
-    size += KernelSlabHeapGapsSize;
+    size += CalculateSlabHeapGapSize();
 
     return size;
 }
 
+void InitializeKPageBufferSlabHeap(Core::System& system) {
+    auto& kernel = system.Kernel();
+
+    const auto& counts = kernel.SlabResourceCounts();
+    const size_t num_pages =
+        counts.num_KProcess + counts.num_KThread + (counts.num_KProcess + counts.num_KThread) / 8;
+    const size_t slab_size = num_pages * PageSize;
+
+    // Reserve memory from the system resource limit.
+    ASSERT(kernel.GetSystemResourceLimit()->Reserve(LimitableResource::PhysicalMemory, slab_size));
+
+    // Allocate memory for the slab.
+    constexpr auto AllocateOption = KMemoryManager::EncodeOption(
+        KMemoryManager::Pool::System, KMemoryManager::Direction::FromFront);
+    const PAddr slab_address =
+        kernel.MemoryManager().AllocateAndOpenContinuous(num_pages, 1, AllocateOption);
+    ASSERT(slab_address != 0);
+
+    // Initialize the slabheap.
+    KPageBuffer::InitializeSlabHeap(kernel, system.DeviceMemory().GetPointer(slab_address),
+                                    slab_size);
+}
+
 void InitializeSlabHeaps(Core::System& system, KMemoryLayout& memory_layout) {
     auto& kernel = system.Kernel();
 
@@ -160,13 +205,13 @@ void InitializeSlabHeaps(Core::System& system, KMemoryLayout& memory_layout) {
     }
 
     // Create an array to represent the gaps between the slabs.
-    const size_t total_gap_size = KernelSlabHeapGapsSize;
+    const size_t total_gap_size = CalculateSlabHeapGapSize();
     std::array<size_t, slab_types.size()> slab_gaps;
-    for (size_t i = 0; i < slab_gaps.size(); i++) {
+    for (auto& slab_gap : slab_gaps) {
         // Note: This is an off-by-one error from Nintendo's intention, because GenerateRandomRange
         // is inclusive. However, Nintendo also has the off-by-one error, and it's "harmless", so we
         // will include it ourselves.
-        slab_gaps[i] = KSystemControl::GenerateRandomRange(0, total_gap_size);
+        slab_gap = KSystemControl::GenerateRandomRange(0, total_gap_size);
     }
 
     // Sort the array, so that we can treat differences between values as offsets to the starts of
@@ -177,13 +222,21 @@ void InitializeSlabHeaps(Core::System& system, KMemoryLayout& memory_layout) {
         }
     }
 
-    for (size_t i = 0; i < slab_types.size(); i++) {
+    // Track the gaps, so that we can free them to the unused slab tree.
+    VAddr gap_start = address;
+    size_t gap_size = 0;
+
+    for (size_t i = 0; i < slab_gaps.size(); i++) {
         // Add the random gap to the address.
-        address += (i == 0) ? slab_gaps[0] : slab_gaps[i] - slab_gaps[i - 1];
+        const auto cur_gap = (i == 0) ? slab_gaps[0] : slab_gaps[i] - slab_gaps[i - 1];
+        address += cur_gap;
+        gap_size += cur_gap;
 
 #define INITIALIZE_SLAB_HEAP(NAME, COUNT, ...)                                                     \
     case KSlabType_##NAME:                                                                         \
-        address = InitializeSlabHeap<NAME>(system, memory_layout, address, COUNT);                 \
+        if (COUNT > 0) {                                                                           \
+            address = InitializeSlabHeap<NAME>(system, memory_layout, address, COUNT);             \
+        }                                                                                          \
         break;
 
         // Initialize the slabheap.
@@ -192,7 +245,13 @@ void InitializeSlabHeaps(Core::System& system, KMemoryLayout& memory_layout) {
             FOREACH_SLAB_TYPE(INITIALIZE_SLAB_HEAP)
             // If we somehow get an invalid type, abort.
         default:
-            UNREACHABLE();
+            UNREACHABLE_MSG("Unknown slab type: {}", slab_types[i]);
+        }
+
+        // If we've hit the end of a gap, free it.
+        if (gap_start + gap_size != address) {
+            gap_start = address;
+            gap_size = 0;
         }
     }
 }
diff --git a/src/core/hle/kernel/init/init_slab_setup.h b/src/core/hle/kernel/init/init_slab_setup.h
index a8f7e0918..f54b67d02 100644
--- a/src/core/hle/kernel/init/init_slab_setup.h
+++ b/src/core/hle/kernel/init/init_slab_setup.h
@@ -32,12 +32,13 @@ struct KSlabResourceCounts {
     size_t num_KObjectName;
     size_t num_KResourceLimit;
     size_t num_KDebug;
-    size_t num_KAlpha;
-    size_t num_KBeta;
+    size_t num_KIoPool;
+    size_t num_KIoRegion;
 };
 
 void InitializeSlabResourceCounts(KernelCore& kernel);
 size_t CalculateTotalSlabHeapSize(const KernelCore& kernel);
+void InitializeKPageBufferSlabHeap(Core::System& system);
 void InitializeSlabHeaps(Core::System& system, KMemoryLayout& memory_layout);
 
 } // namespace Kernel::Init
diff --git a/src/core/hle/kernel/k_address_arbiter.cpp b/src/core/hle/kernel/k_address_arbiter.cpp
index 1d1f5e5f8..8cdd0490f 100644
--- a/src/core/hle/kernel/k_address_arbiter.cpp
+++ b/src/core/hle/kernel/k_address_arbiter.cpp
@@ -115,7 +115,7 @@ ResultCode KAddressArbiter::Signal(VAddr addr, s32 count) {
     {
         KScopedSchedulerLock sl(kernel);
 
-        auto it = thread_tree.nfind_light({addr, -1});
+        auto it = thread_tree.nfind_key({addr, -1});
         while ((it != thread_tree.end()) && (count <= 0 || num_waiters < count) &&
                (it->GetAddressArbiterKey() == addr)) {
             // End the thread's wait.
@@ -148,7 +148,7 @@ ResultCode KAddressArbiter::SignalAndIncrementIfEqual(VAddr addr, s32 value, s32
             return ResultInvalidState;
         }
 
-        auto it = thread_tree.nfind_light({addr, -1});
+        auto it = thread_tree.nfind_key({addr, -1});
         while ((it != thread_tree.end()) && (count <= 0 || num_waiters < count) &&
                (it->GetAddressArbiterKey() == addr)) {
             // End the thread's wait.
@@ -171,7 +171,7 @@ ResultCode KAddressArbiter::SignalAndModifyByWaitingCountIfEqual(VAddr addr, s32
     {
         [[maybe_unused]] const KScopedSchedulerLock sl(kernel);
 
-        auto it = thread_tree.nfind_light({addr, -1});
+        auto it = thread_tree.nfind_key({addr, -1});
         // Determine the updated value.
         s32 new_value{};
         if (count <= 0) {
diff --git a/src/core/hle/kernel/k_condition_variable.cpp b/src/core/hle/kernel/k_condition_variable.cpp
index aadcc297a..8e2a9593c 100644
--- a/src/core/hle/kernel/k_condition_variable.cpp
+++ b/src/core/hle/kernel/k_condition_variable.cpp
@@ -244,7 +244,7 @@ void KConditionVariable::Signal(u64 cv_key, s32 count) {
     {
         KScopedSchedulerLock sl(kernel);
 
-        auto it = thread_tree.nfind_light({cv_key, -1});
+        auto it = thread_tree.nfind_key({cv_key, -1});
         while ((it != thread_tree.end()) && (count <= 0 || num_waiters < count) &&
                (it->GetConditionVariableKey() == cv_key)) {
             KThread* target_thread = std::addressof(*it);
diff --git a/src/core/hle/kernel/k_memory_layout.h b/src/core/hle/kernel/k_memory_layout.h
index bcddb0d62..0858827b6 100644
--- a/src/core/hle/kernel/k_memory_layout.h
+++ b/src/core/hle/kernel/k_memory_layout.h
@@ -57,11 +57,11 @@ constexpr std::size_t KernelPageTableHeapSize = GetMaximumOverheadSize(MainMemor
 constexpr std::size_t KernelInitialPageHeapSize = 128_KiB;
 
 constexpr std::size_t KernelSlabHeapDataSize = 5_MiB;
-constexpr std::size_t KernelSlabHeapGapsSize = 2_MiB - 64_KiB;
-constexpr std::size_t KernelSlabHeapSize = KernelSlabHeapDataSize + KernelSlabHeapGapsSize;
+constexpr std::size_t KernelSlabHeapGapsSizeMax = 2_MiB - 64_KiB;
+constexpr std::size_t KernelSlabHeapSize = KernelSlabHeapDataSize + KernelSlabHeapGapsSizeMax;
 
 // NOTE: This is calculated from KThread slab counts, assuming KThread size <= 0x860.
-constexpr std::size_t KernelSlabHeapAdditionalSize = 416_KiB;
+constexpr std::size_t KernelSlabHeapAdditionalSize = 0x68000;
 
 constexpr std::size_t KernelResourceSize =
     KernelPageTableHeapSize + KernelInitialPageHeapSize + KernelSlabHeapSize;
diff --git a/src/core/hle/kernel/k_page_buffer.h b/src/core/hle/kernel/k_page_buffer.h
new file mode 100644
index 000000000..0a9451228
--- /dev/null
+++ b/src/core/hle/kernel/k_page_buffer.h
@@ -0,0 +1,34 @@
+// Copyright 2022 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+
+#include "common/alignment.h"
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "core/core.h"
+#include "core/device_memory.h"
+#include "core/hle/kernel/memory_types.h"
+
+namespace Kernel {
+
+class KPageBuffer final : public KSlabAllocated<KPageBuffer> {
+public:
+    KPageBuffer() = default;
+
+    static KPageBuffer* FromPhysicalAddress(Core::System& system, PAddr phys_addr) {
+        ASSERT(Common::IsAligned(phys_addr, PageSize));
+        return reinterpret_cast<KPageBuffer*>(system.DeviceMemory().GetPointer(phys_addr));
+    }
+
+private:
+    [[maybe_unused]] alignas(PageSize) std::array<u8, PageSize> m_buffer{};
+};
+
+static_assert(sizeof(KPageBuffer) == PageSize);
+static_assert(alignof(KPageBuffer) == PageSize);
+
+} // namespace Kernel
diff --git a/src/core/hle/kernel/k_page_table.cpp b/src/core/hle/kernel/k_page_table.cpp
index 0602de1f7..02d93b12e 100644
--- a/src/core/hle/kernel/k_page_table.cpp
+++ b/src/core/hle/kernel/k_page_table.cpp
@@ -424,6 +424,68 @@ ResultCode KPageTable::UnmapCodeMemory(VAddr dst_address, VAddr src_address, std
     return ResultSuccess;
 }
 
+VAddr KPageTable::FindFreeArea(VAddr region_start, std::size_t region_num_pages,
+                               std::size_t num_pages, std::size_t alignment, std::size_t offset,
+                               std::size_t guard_pages) {
+    VAddr address = 0;
+
+    if (num_pages <= region_num_pages) {
+        if (this->IsAslrEnabled()) {
+            // Try to directly find a free area up to 8 times.
+            for (std::size_t i = 0; i < 8; i++) {
+                const std::size_t random_offset =
+                    KSystemControl::GenerateRandomRange(
+                        0, (region_num_pages - num_pages - guard_pages) * PageSize / alignment) *
+                    alignment;
+                const VAddr candidate =
+                    Common::AlignDown((region_start + random_offset), alignment) + offset;
+
+                KMemoryInfo info = this->QueryInfoImpl(candidate);
+
+                if (info.state != KMemoryState::Free) {
+                    continue;
+                }
+                if (region_start > candidate) {
+                    continue;
+                }
+                if (info.GetAddress() + guard_pages * PageSize > candidate) {
+                    continue;
+                }
+
+                const VAddr candidate_end = candidate + (num_pages + guard_pages) * PageSize - 1;
+                if (candidate_end > info.GetLastAddress()) {
+                    continue;
+                }
+                if (candidate_end > region_start + region_num_pages * PageSize - 1) {
+                    continue;
+                }
+
+                address = candidate;
+                break;
+            }
+            // Fall back to finding the first free area with a random offset.
+            if (address == 0) {
+                // NOTE: Nintendo does not account for guard pages here.
+                // This may theoretically cause an offset to be chosen that cannot be mapped. We
+                // will account for guard pages.
+                const std::size_t offset_pages = KSystemControl::GenerateRandomRange(
+                    0, region_num_pages - num_pages - guard_pages);
+                address = block_manager->FindFreeArea(region_start + offset_pages * PageSize,
+                                                      region_num_pages - offset_pages, num_pages,
+                                                      alignment, offset, guard_pages);
+            }
+        }
+
+        // Find the first free area.
+        if (address == 0) {
+            address = block_manager->FindFreeArea(region_start, region_num_pages, num_pages,
+                                                  alignment, offset, guard_pages);
+        }
+    }
+
+    return address;
+}
+
 ResultCode KPageTable::UnmapProcessMemory(VAddr dst_addr, std::size_t size,
                                           KPageTable& src_page_table, VAddr src_addr) {
     KScopedLightLock lk(general_lock);
@@ -1055,6 +1117,46 @@ ResultCode KPageTable::MapPages(VAddr address, KPageLinkedList& page_linked_list
     return ResultSuccess;
 }
 
+ResultCode KPageTable::MapPages(VAddr* out_addr, std::size_t num_pages, std::size_t alignment,
+                                PAddr phys_addr, bool is_pa_valid, VAddr region_start,
+                                std::size_t region_num_pages, KMemoryState state,
+                                KMemoryPermission perm) {
+    ASSERT(Common::IsAligned(alignment, PageSize) && alignment >= PageSize);
+
+    // Ensure this is a valid map request.
+    R_UNLESS(this->CanContain(region_start, region_num_pages * PageSize, state),
+             ResultInvalidCurrentMemory);
+    R_UNLESS(num_pages < region_num_pages, ResultOutOfMemory);
+
+    // Lock the table.
+    KScopedLightLock lk(general_lock);
+
+    // Find a random address to map at.
+    VAddr addr = this->FindFreeArea(region_start, region_num_pages, num_pages, alignment, 0,
+                                    this->GetNumGuardPages());
+    R_UNLESS(addr != 0, ResultOutOfMemory);
+    ASSERT(Common::IsAligned(addr, alignment));
+    ASSERT(this->CanContain(addr, num_pages * PageSize, state));
+    ASSERT(this->CheckMemoryState(addr, num_pages * PageSize, KMemoryState::All, KMemoryState::Free,
+                                  KMemoryPermission::None, KMemoryPermission::None,
+                                  KMemoryAttribute::None, KMemoryAttribute::None)
+               .IsSuccess());
+
+    // Perform mapping operation.
+    if (is_pa_valid) {
+        R_TRY(this->Operate(addr, num_pages, perm, OperationType::Map, phys_addr));
+    } else {
+        UNIMPLEMENTED();
+    }
+
+    // Update the blocks.
+    block_manager->Update(addr, num_pages, state, perm);
+
+    // We successfully mapped the pages.
+    *out_addr = addr;
+    return ResultSuccess;
+}
+
 ResultCode KPageTable::UnmapPages(VAddr addr, const KPageLinkedList& page_linked_list) {
     ASSERT(this->IsLockedByCurrentThread());
 
@@ -1097,6 +1199,30 @@ ResultCode KPageTable::UnmapPages(VAddr addr, KPageLinkedList& page_linked_list,
     return ResultSuccess;
 }
 
+ResultCode KPageTable::UnmapPages(VAddr address, std::size_t num_pages, KMemoryState state) {
+    // Check that the unmap is in range.
+    const std::size_t size = num_pages * PageSize;
+    R_UNLESS(this->Contains(address, size), ResultInvalidCurrentMemory);
+
+    // Lock the table.
+    KScopedLightLock lk(general_lock);
+
+    // Check the memory state.
+    std::size_t num_allocator_blocks{};
+    R_TRY(this->CheckMemoryState(std::addressof(num_allocator_blocks), address, size,
+                                 KMemoryState::All, state, KMemoryPermission::None,
+                                 KMemoryPermission::None, KMemoryAttribute::All,
+                                 KMemoryAttribute::None));
+
+    // Perform the unmap.
+    R_TRY(Operate(address, num_pages, KMemoryPermission::None, OperationType::Unmap));
+
+    // Update the blocks.
+    block_manager->Update(address, num_pages, KMemoryState::Free, KMemoryPermission::None);
+
+    return ResultSuccess;
+}
+
 ResultCode KPageTable::SetProcessMemoryPermission(VAddr addr, std::size_t size,
                                                   Svc::MemoryPermission svc_perm) {
     const size_t num_pages = size / PageSize;
diff --git a/src/core/hle/kernel/k_page_table.h b/src/core/hle/kernel/k_page_table.h
index e99abe36a..54c6adf8d 100644
--- a/src/core/hle/kernel/k_page_table.h
+++ b/src/core/hle/kernel/k_page_table.h
@@ -46,7 +46,14 @@ public:
     ResultCode UnmapMemory(VAddr dst_addr, VAddr src_addr, std::size_t size);
     ResultCode MapPages(VAddr addr, KPageLinkedList& page_linked_list, KMemoryState state,
                         KMemoryPermission perm);
+    ResultCode MapPages(VAddr* out_addr, std::size_t num_pages, std::size_t alignment,
+                        PAddr phys_addr, KMemoryState state, KMemoryPermission perm) {
+        return this->MapPages(out_addr, num_pages, alignment, phys_addr, true,
+                              this->GetRegionAddress(state), this->GetRegionSize(state) / PageSize,
+                              state, perm);
+    }
     ResultCode UnmapPages(VAddr addr, KPageLinkedList& page_linked_list, KMemoryState state);
+    ResultCode UnmapPages(VAddr address, std::size_t num_pages, KMemoryState state);
     ResultCode SetProcessMemoryPermission(VAddr addr, std::size_t size,
                                           Svc::MemoryPermission svc_perm);
     KMemoryInfo QueryInfo(VAddr addr);
@@ -91,6 +98,9 @@ private:
     ResultCode InitializeMemoryLayout(VAddr start, VAddr end);
     ResultCode MapPages(VAddr addr, const KPageLinkedList& page_linked_list,
                         KMemoryPermission perm);
+    ResultCode MapPages(VAddr* out_addr, std::size_t num_pages, std::size_t alignment,
+                        PAddr phys_addr, bool is_pa_valid, VAddr region_start,
+                        std::size_t region_num_pages, KMemoryState state, KMemoryPermission perm);
     ResultCode UnmapPages(VAddr addr, const KPageLinkedList& page_linked_list);
     bool IsRegionMapped(VAddr address, u64 size);
     bool IsRegionContiguous(VAddr addr, u64 size) const;
@@ -105,6 +115,9 @@ private:
     VAddr GetRegionAddress(KMemoryState state) const;
     std::size_t GetRegionSize(KMemoryState state) const;
 
+    VAddr FindFreeArea(VAddr region_start, std::size_t region_num_pages, std::size_t num_pages,
+                       std::size_t alignment, std::size_t offset, std::size_t guard_pages);
+
     ResultCode CheckMemoryStateContiguous(std::size_t* out_blocks_needed, VAddr addr,
                                           std::size_t size, KMemoryState state_mask,
                                           KMemoryState state, KMemoryPermission perm_mask,
@@ -137,7 +150,7 @@ private:
         return CheckMemoryState(nullptr, nullptr, nullptr, out_blocks_needed, addr, size,
                                 state_mask, state, perm_mask, perm, attr_mask, attr, ignore_attr);
     }
-    ResultCode CheckMemoryState(VAddr addr, size_t size, KMemoryState state_mask,
+    ResultCode CheckMemoryState(VAddr addr, std::size_t size, KMemoryState state_mask,
                                 KMemoryState state, KMemoryPermission perm_mask,
                                 KMemoryPermission perm, KMemoryAttribute attr_mask,
                                 KMemoryAttribute attr,
@@ -210,7 +223,7 @@ public:
     constexpr VAddr GetAliasCodeRegionSize() const {
         return alias_code_region_end - alias_code_region_start;
     }
-    size_t GetNormalMemorySize() {
+    std::size_t GetNormalMemorySize() {
         KScopedLightLock lk(general_lock);
         return GetHeapSize() + mapped_physical_memory_size;
     }
diff --git a/src/core/hle/kernel/k_port.cpp b/src/core/hle/kernel/k_port.cpp
index a8ba09c4a..ceb98709f 100644
--- a/src/core/hle/kernel/k_port.cpp
+++ b/src/core/hle/kernel/k_port.cpp
@@ -57,7 +57,12 @@ ResultCode KPort::EnqueueSession(KServerSession* session) {
     R_UNLESS(state == State::Normal, ResultPortClosed);
 
     server.EnqueueSession(session);
-    server.GetSessionRequestHandler()->ClientConnected(server.AcceptSession());
+
+    if (auto session_ptr = server.GetSessionRequestHandler().lock()) {
+        session_ptr->ClientConnected(server.AcceptSession());
+    } else {
+        UNREACHABLE();
+    }
 
     return ResultSuccess;
 }
diff --git a/src/core/hle/kernel/k_process.cpp b/src/core/hle/kernel/k_process.cpp
index 9233261cd..b39405496 100644
--- a/src/core/hle/kernel/k_process.cpp
+++ b/src/core/hle/kernel/k_process.cpp
@@ -70,58 +70,6 @@ void SetupMainThread(Core::System& system, KProcess& owner_process, u32 priority
 }
 } // Anonymous namespace
 
-// Represents a page used for thread-local storage.
-//
-// Each TLS page contains slots that may be used by processes and threads.
-// Every process and thread is created with a slot in some arbitrary page
-// (whichever page happens to have an available slot).
-class TLSPage {
-public:
-    static constexpr std::size_t num_slot_entries =
-        Core::Memory::PAGE_SIZE / Core::Memory::TLS_ENTRY_SIZE;
-
-    explicit TLSPage(VAddr address) : base_address{address} {}
-
-    bool HasAvailableSlots() const {
-        return !is_slot_used.all();
-    }
-
-    VAddr GetBaseAddress() const {
-        return base_address;
-    }
-
-    std::optional<VAddr> ReserveSlot() {
-        for (std::size_t i = 0; i < is_slot_used.size(); i++) {
-            if (is_slot_used[i]) {
-                continue;
-            }
-
-            is_slot_used[i] = true;
-            return base_address + (i * Core::Memory::TLS_ENTRY_SIZE);
-        }
-
-        return std::nullopt;
-    }
-
-    void ReleaseSlot(VAddr address) {
-        // Ensure that all given addresses are consistent with how TLS pages
-        // are intended to be used when releasing slots.
-        ASSERT(IsWithinPage(address));
-        ASSERT((address % Core::Memory::TLS_ENTRY_SIZE) == 0);
-
-        const std::size_t index = (address - base_address) / Core::Memory::TLS_ENTRY_SIZE;
-        is_slot_used[index] = false;
-    }
-
-private:
-    bool IsWithinPage(VAddr address) const {
-        return base_address <= address && address < base_address + Core::Memory::PAGE_SIZE;
-    }
-
-    VAddr base_address;
-    std::bitset<num_slot_entries> is_slot_used;
-};
-
 ResultCode KProcess::Initialize(KProcess* process, Core::System& system, std::string process_name,
                                 ProcessType type, KResourceLimit* res_limit) {
     auto& kernel = system.Kernel();
@@ -404,7 +352,7 @@ ResultCode KProcess::LoadFromMetadata(const FileSys::ProgramMetadata& metadata,
     }
 
     // Create TLS region
-    tls_region_address = CreateTLSRegion();
+    R_TRY(this->CreateThreadLocalRegion(std::addressof(tls_region_address)));
     memory_reservation.Commit();
 
     return handle_table.Initialize(capabilities.GetHandleTableSize());
@@ -444,7 +392,7 @@ void KProcess::PrepareForTermination() {
 
     stop_threads(kernel.System().GlobalSchedulerContext().GetThreadList());
 
-    FreeTLSRegion(tls_region_address);
+    this->DeleteThreadLocalRegion(tls_region_address);
     tls_region_address = 0;
 
     if (resource_limit) {
@@ -456,9 +404,6 @@ void KProcess::PrepareForTermination() {
 }
 
 void KProcess::Finalize() {
-    // Finalize the handle table and close any open handles.
-    handle_table.Finalize();
-
     // Free all shared memory infos.
     {
         auto it = shared_memory_list.begin();
@@ -483,67 +428,110 @@ void KProcess::Finalize() {
         resource_limit = nullptr;
     }
 
+    // Finalize the page table.
+    page_table.reset();
+
     // Perform inherited finalization.
     KAutoObjectWithSlabHeapAndContainer<KProcess, KWorkerTask>::Finalize();
 }
 
-/**
- * Attempts to find a TLS page that contains a free slot for
- * use by a thread.
- *
- * @returns If a page with an available slot is found, then an iterator
- *          pointing to the page is returned. Otherwise the end iterator
- *          is returned instead.
- */
-static auto FindTLSPageWithAvailableSlots(std::vector<TLSPage>& tls_pages) {
-    return std::find_if(tls_pages.begin(), tls_pages.end(),
-                        [](const auto& page) { return page.HasAvailableSlots(); });
-}
+ResultCode KProcess::CreateThreadLocalRegion(VAddr* out) {
+    KThreadLocalPage* tlp = nullptr;
+    VAddr tlr = 0;
 
-VAddr KProcess::CreateTLSRegion() {
-    KScopedSchedulerLock lock(kernel);
-    if (auto tls_page_iter{FindTLSPageWithAvailableSlots(tls_pages)};
-        tls_page_iter != tls_pages.cend()) {
-        return *tls_page_iter->ReserveSlot();
-    }
+    // See if we can get a region from a partially used TLP.
+    {
+        KScopedSchedulerLock sl{kernel};
 
-    Page* const tls_page_ptr{kernel.GetUserSlabHeapPages().Allocate()};
-    ASSERT(tls_page_ptr);
+        if (auto it = partially_used_tlp_tree.begin(); it != partially_used_tlp_tree.end()) {
+            tlr = it->Reserve();
+            ASSERT(tlr != 0);
 
-    const VAddr start{page_table->GetKernelMapRegionStart()};
-    const VAddr size{page_table->GetKernelMapRegionEnd() - start};
-    const PAddr tls_map_addr{kernel.System().DeviceMemory().GetPhysicalAddr(tls_page_ptr)};
-    const VAddr tls_page_addr{page_table
-                                  ->AllocateAndMapMemory(1, PageSize, true, start, size / PageSize,
-                                                         KMemoryState::ThreadLocal,
-                                                         KMemoryPermission::UserReadWrite,
-                                                         tls_map_addr)
-                                  .ValueOr(0)};
+            if (it->IsAllUsed()) {
+                tlp = std::addressof(*it);
+                partially_used_tlp_tree.erase(it);
+                fully_used_tlp_tree.insert(*tlp);
+            }
 
-    ASSERT(tls_page_addr);
+            *out = tlr;
+            return ResultSuccess;
+        }
+    }
 
-    std::memset(tls_page_ptr, 0, PageSize);
-    tls_pages.emplace_back(tls_page_addr);
+    // Allocate a new page.
+    tlp = KThreadLocalPage::Allocate(kernel);
+    R_UNLESS(tlp != nullptr, ResultOutOfMemory);
+    auto tlp_guard = SCOPE_GUARD({ KThreadLocalPage::Free(kernel, tlp); });
 
-    const auto reserve_result{tls_pages.back().ReserveSlot()};
-    ASSERT(reserve_result.has_value());
+    // Initialize the new page.
+    R_TRY(tlp->Initialize(kernel, this));
+
+    // Reserve a TLR.
+    tlr = tlp->Reserve();
+    ASSERT(tlr != 0);
+
+    // Insert into our tree.
+    {
+        KScopedSchedulerLock sl{kernel};
+        if (tlp->IsAllUsed()) {
+            fully_used_tlp_tree.insert(*tlp);
+        } else {
+            partially_used_tlp_tree.insert(*tlp);
+        }
+    }
 
-    return *reserve_result;
+    // We succeeded!
+    tlp_guard.Cancel();
+    *out = tlr;
+    return ResultSuccess;
 }
 
-void KProcess::FreeTLSRegion(VAddr tls_address) {
-    KScopedSchedulerLock lock(kernel);
-    const VAddr aligned_address = Common::AlignDown(tls_address, Core::Memory::PAGE_SIZE);
-    auto iter =
-        std::find_if(tls_pages.begin(), tls_pages.end(), [aligned_address](const auto& page) {
-            return page.GetBaseAddress() == aligned_address;
-        });
+ResultCode KProcess::DeleteThreadLocalRegion(VAddr addr) {
+    KThreadLocalPage* page_to_free = nullptr;
+
+    // Release the region.
+    {
+        KScopedSchedulerLock sl{kernel};
+
+        // Try to find the page in the partially used list.
+        auto it = partially_used_tlp_tree.find_key(Common::AlignDown(addr, PageSize));
+        if (it == partially_used_tlp_tree.end()) {
+            // If we don't find it, it has to be in the fully used list.
+            it = fully_used_tlp_tree.find_key(Common::AlignDown(addr, PageSize));
+            R_UNLESS(it != fully_used_tlp_tree.end(), ResultInvalidAddress);
+
+            // Release the region.
+            it->Release(addr);
+
+            // Move the page out of the fully used list.
+            KThreadLocalPage* tlp = std::addressof(*it);
+            fully_used_tlp_tree.erase(it);
+            if (tlp->IsAllFree()) {
+                page_to_free = tlp;
+            } else {
+                partially_used_tlp_tree.insert(*tlp);
+            }
+        } else {
+            // Release the region.
+            it->Release(addr);
+
+            // Handle the all-free case.
+            KThreadLocalPage* tlp = std::addressof(*it);
+            if (tlp->IsAllFree()) {
+                partially_used_tlp_tree.erase(it);
+                page_to_free = tlp;
+            }
+        }
+    }
+
+    // If we should free the page it was in, do so.
+    if (page_to_free != nullptr) {
+        page_to_free->Finalize();
 
-    // Something has gone very wrong if we're freeing a region
-    // with no actual page available.
-    ASSERT(iter != tls_pages.cend());
+        KThreadLocalPage::Free(kernel, page_to_free);
+    }
 
-    iter->ReleaseSlot(tls_address);
+    return ResultSuccess;
 }
 
 void KProcess::LoadModule(CodeSet code_set, VAddr base_addr) {
diff --git a/src/core/hle/kernel/k_process.h b/src/core/hle/kernel/k_process.h
index cf1b67428..5ed0f2d83 100644
--- a/src/core/hle/kernel/k_process.h
+++ b/src/core/hle/kernel/k_process.h
@@ -15,6 +15,7 @@
 #include "core/hle/kernel/k_condition_variable.h"
 #include "core/hle/kernel/k_handle_table.h"
 #include "core/hle/kernel/k_synchronization_object.h"
+#include "core/hle/kernel/k_thread_local_page.h"
 #include "core/hle/kernel/k_worker_task.h"
 #include "core/hle/kernel/process_capability.h"
 #include "core/hle/kernel/slab_helpers.h"
@@ -362,10 +363,10 @@ public:
     // Thread-local storage management
 
     // Marks the next available region as used and returns the address of the slot.
-    [[nodiscard]] VAddr CreateTLSRegion();
+    [[nodiscard]] ResultCode CreateThreadLocalRegion(VAddr* out);
 
     // Frees a used TLS slot identified by the given address
-    void FreeTLSRegion(VAddr tls_address);
+    ResultCode DeleteThreadLocalRegion(VAddr addr);
 
 private:
     void PinThread(s32 core_id, KThread* thread) {
@@ -413,13 +414,6 @@ private:
     /// The ideal CPU core for this process, threads are scheduled on this core by default.
     u8 ideal_core = 0;
 
-    /// The Thread Local Storage area is allocated as processes create threads,
-    /// each TLS area is 0x200 bytes, so one page (0x1000) is split up in 8 parts, and each part
-    /// holds the TLS for a specific thread. This vector contains which parts are in use for each
-    /// page as a bitmask.
-    /// This vector will grow as more pages are allocated for new threads.
-    std::vector<TLSPage> tls_pages;
-
     /// Contains the parsed process capability descriptors.
     ProcessCapabilities capabilities;
 
@@ -482,6 +476,12 @@ private:
     KThread* exception_thread{};
 
     KLightLock state_lock;
+
+    using TLPTree =
+        Common::IntrusiveRedBlackTreeBaseTraits<KThreadLocalPage>::TreeType<KThreadLocalPage>;
+    using TLPIterator = TLPTree::iterator;
+    TLPTree fully_used_tlp_tree;
+    TLPTree partially_used_tlp_tree;
 };
 
 } // namespace Kernel
diff --git a/src/core/hle/kernel/k_server_port.h b/src/core/hle/kernel/k_server_port.h
index 6302d5e61..2185736be 100644
--- a/src/core/hle/kernel/k_server_port.h
+++ b/src/core/hle/kernel/k_server_port.h
@@ -30,11 +30,11 @@ public:
 
     /// Whether or not this server port has an HLE handler available.
     bool HasSessionRequestHandler() const {
-        return session_handler != nullptr;
+        return !session_handler.expired();
     }
 
     /// Gets the HLE handler for this port.
-    SessionRequestHandlerPtr GetSessionRequestHandler() const {
+    SessionRequestHandlerWeakPtr GetSessionRequestHandler() const {
         return session_handler;
     }
 
@@ -42,7 +42,7 @@ public:
      * Sets the HLE handler template for the port. ServerSessions crated by connecting to this port
      * will inherit a reference to this handler.
      */
-    void SetSessionHandler(SessionRequestHandlerPtr&& handler) {
+    void SetSessionHandler(SessionRequestHandlerWeakPtr&& handler) {
         session_handler = std::move(handler);
     }
 
@@ -66,7 +66,7 @@ private:
     void CleanupSessions();
 
     SessionList session_list;
-    SessionRequestHandlerPtr session_handler;
+    SessionRequestHandlerWeakPtr session_handler;
     KPort* parent{};
 };
 
diff --git a/src/core/hle/kernel/k_server_session.cpp b/src/core/hle/kernel/k_server_session.cpp
index 4d94eb9cf..30c56ff29 100644
--- a/src/core/hle/kernel/k_server_session.cpp
+++ b/src/core/hle/kernel/k_server_session.cpp
@@ -27,10 +27,7 @@ namespace Kernel {
 
 KServerSession::KServerSession(KernelCore& kernel_) : KSynchronizationObject{kernel_} {}
 
-KServerSession::~KServerSession() {
-    // Ensure that the global list tracking server sessions does not hold on to a reference.
-    kernel.UnregisterServerSession(this);
-}
+KServerSession::~KServerSession() = default;
 
 void KServerSession::Initialize(KSession* parent_session_, std::string&& name_,
                                 std::shared_ptr<SessionRequestManager> manager_) {
@@ -49,6 +46,9 @@ void KServerSession::Destroy() {
     parent->OnServerClosed();
 
     parent->Close();
+
+    // Release host emulation members.
+    manager.reset();
 }
 
 void KServerSession::OnClientClosed() {
@@ -98,7 +98,12 @@ ResultCode KServerSession::HandleDomainSyncRequest(Kernel::HLERequestContext& co
             UNREACHABLE();
             return ResultSuccess; // Ignore error if asserts are off
         }
-        return manager->DomainHandler(object_id - 1)->HandleSyncRequest(*this, context);
+        if (auto strong_ptr = manager->DomainHandler(object_id - 1).lock()) {
+            return strong_ptr->HandleSyncRequest(*this, context);
+        } else {
+            UNREACHABLE();
+            return ResultSuccess;
+        }
 
     case IPC::DomainMessageHeader::CommandType::CloseVirtualHandle: {
         LOG_DEBUG(IPC, "CloseVirtualHandle, object_id=0x{:08X}", object_id);
diff --git a/src/core/hle/kernel/k_slab_heap.h b/src/core/hle/kernel/k_slab_heap.h
index 05c0bec9c..5690cc757 100644
--- a/src/core/hle/kernel/k_slab_heap.h
+++ b/src/core/hle/kernel/k_slab_heap.h
@@ -16,39 +16,34 @@ class KernelCore;
 
 namespace impl {
 
-class KSlabHeapImpl final {
-public:
+class KSlabHeapImpl {
     YUZU_NON_COPYABLE(KSlabHeapImpl);
     YUZU_NON_MOVEABLE(KSlabHeapImpl);
 
+public:
     struct Node {
         Node* next{};
     };
 
+public:
     constexpr KSlabHeapImpl() = default;
-    constexpr ~KSlabHeapImpl() = default;
 
-    void Initialize(std::size_t size) {
-        ASSERT(head == nullptr);
-        obj_size = size;
-    }
-
-    constexpr std::size_t GetObjectSize() const {
-        return obj_size;
+    void Initialize() {
+        ASSERT(m_head == nullptr);
     }
 
     Node* GetHead() const {
-        return head;
+        return m_head;
     }
 
     void* Allocate() {
-        Node* ret = head.load();
+        Node* ret = m_head.load();
 
         do {
             if (ret == nullptr) {
                 break;
             }
-        } while (!head.compare_exchange_weak(ret, ret->next));
+        } while (!m_head.compare_exchange_weak(ret, ret->next));
 
         return ret;
     }
@@ -56,170 +51,157 @@ public:
     void Free(void* obj) {
         Node* node = static_cast<Node*>(obj);
 
-        Node* cur_head = head.load();
+        Node* cur_head = m_head.load();
         do {
             node->next = cur_head;
-        } while (!head.compare_exchange_weak(cur_head, node));
+        } while (!m_head.compare_exchange_weak(cur_head, node));
     }
 
 private:
-    std::atomic<Node*> head{};
-    std::size_t obj_size{};
+    std::atomic<Node*> m_head{};
 };
 
 } // namespace impl
 
-class KSlabHeapBase {
-public:
+template <bool SupportDynamicExpansion>
+class KSlabHeapBase : protected impl::KSlabHeapImpl {
     YUZU_NON_COPYABLE(KSlabHeapBase);
     YUZU_NON_MOVEABLE(KSlabHeapBase);
 
-    constexpr KSlabHeapBase() = default;
-    constexpr ~KSlabHeapBase() = default;
+private:
+    size_t m_obj_size{};
+    uintptr_t m_peak{};
+    uintptr_t m_start{};
+    uintptr_t m_end{};
 
-    constexpr bool Contains(uintptr_t addr) const {
-        return start <= addr && addr < end;
-    }
+private:
+    void UpdatePeakImpl(uintptr_t obj) {
+        static_assert(std::atomic_ref<uintptr_t>::is_always_lock_free);
+        std::atomic_ref<uintptr_t> peak_ref(m_peak);
 
-    constexpr std::size_t GetSlabHeapSize() const {
-        return (end - start) / GetObjectSize();
+        const uintptr_t alloc_peak = obj + this->GetObjectSize();
+        uintptr_t cur_peak = m_peak;
+        do {
+            if (alloc_peak <= cur_peak) {
+                break;
+            }
+        } while (!peak_ref.compare_exchange_strong(cur_peak, alloc_peak));
     }
 
-    constexpr std::size_t GetObjectSize() const {
-        return impl.GetObjectSize();
-    }
+public:
+    constexpr KSlabHeapBase() = default;
 
-    constexpr uintptr_t GetSlabHeapAddress() const {
-        return start;
+    bool Contains(uintptr_t address) const {
+        return m_start <= address && address < m_end;
     }
 
-    std::size_t GetObjectIndexImpl(const void* obj) const {
-        return (reinterpret_cast<uintptr_t>(obj) - start) / GetObjectSize();
+    void Initialize(size_t obj_size, void* memory, size_t memory_size) {
+        // Ensure we don't initialize a slab using null memory.
+        ASSERT(memory != nullptr);
+
+        // Set our object size.
+        m_obj_size = obj_size;
+
+        // Initialize the base allocator.
+        KSlabHeapImpl::Initialize();
+
+        // Set our tracking variables.
+        const size_t num_obj = (memory_size / obj_size);
+        m_start = reinterpret_cast<uintptr_t>(memory);
+        m_end = m_start + num_obj * obj_size;
+        m_peak = m_start;
+
+        // Free the objects.
+        u8* cur = reinterpret_cast<u8*>(m_end);
+
+        for (size_t i = 0; i < num_obj; i++) {
+            cur -= obj_size;
+            KSlabHeapImpl::Free(cur);
+        }
     }
 
-    std::size_t GetPeakIndex() const {
-        return GetObjectIndexImpl(reinterpret_cast<const void*>(peak));
+    size_t GetSlabHeapSize() const {
+        return (m_end - m_start) / this->GetObjectSize();
     }
 
-    void* AllocateImpl() {
-        return impl.Allocate();
+    size_t GetObjectSize() const {
+        return m_obj_size;
     }
 
-    void FreeImpl(void* obj) {
-        // Don't allow freeing an object that wasn't allocated from this heap
-        ASSERT(Contains(reinterpret_cast<uintptr_t>(obj)));
+    void* Allocate() {
+        void* obj = KSlabHeapImpl::Allocate();
 
-        impl.Free(obj);
+        return obj;
     }
 
-    void InitializeImpl(std::size_t obj_size, void* memory, std::size_t memory_size) {
-        // Ensure we don't initialize a slab using null memory
-        ASSERT(memory != nullptr);
-
-        // Initialize the base allocator
-        impl.Initialize(obj_size);
+    void Free(void* obj) {
+        // Don't allow freeing an object that wasn't allocated from this heap.
+        const bool contained = this->Contains(reinterpret_cast<uintptr_t>(obj));
+        ASSERT(contained);
+        KSlabHeapImpl::Free(obj);
+    }
 
-        // Set our tracking variables
-        const std::size_t num_obj = (memory_size / obj_size);
-        start = reinterpret_cast<uintptr_t>(memory);
-        end = start + num_obj * obj_size;
-        peak = start;
+    size_t GetObjectIndex(const void* obj) const {
+        if constexpr (SupportDynamicExpansion) {
+            if (!this->Contains(reinterpret_cast<uintptr_t>(obj))) {
+                return std::numeric_limits<size_t>::max();
+            }
+        }
 
-        // Free the objects
-        u8* cur = reinterpret_cast<u8*>(end);
+        return (reinterpret_cast<uintptr_t>(obj) - m_start) / this->GetObjectSize();
+    }
 
-        for (std::size_t i{}; i < num_obj; i++) {
-            cur -= obj_size;
-            impl.Free(cur);
-        }
+    size_t GetPeakIndex() const {
+        return this->GetObjectIndex(reinterpret_cast<const void*>(m_peak));
     }
 
-private:
-    using Impl = impl::KSlabHeapImpl;
+    uintptr_t GetSlabHeapAddress() const {
+        return m_start;
+    }
 
-    Impl impl;
-    uintptr_t peak{};
-    uintptr_t start{};
-    uintptr_t end{};
+    size_t GetNumRemaining() const {
+        // Only calculate the number of remaining objects under debug configuration.
+        return 0;
+    }
 };
 
 template <typename T>
-class KSlabHeap final : public KSlabHeapBase {
-public:
-    enum class AllocationType {
-        Host,
-        Guest,
-    };
+class KSlabHeap final : public KSlabHeapBase<false> {
+private:
+    using BaseHeap = KSlabHeapBase<false>;
 
-    explicit constexpr KSlabHeap(AllocationType allocation_type_ = AllocationType::Host)
-        : KSlabHeapBase(), allocation_type{allocation_type_} {}
+public:
+    constexpr KSlabHeap() = default;
 
-    void Initialize(void* memory, std::size_t memory_size) {
-        if (allocation_type == AllocationType::Guest) {
-            InitializeImpl(sizeof(T), memory, memory_size);
-        }
+    void Initialize(void* memory, size_t memory_size) {
+        BaseHeap::Initialize(sizeof(T), memory, memory_size);
     }
 
     T* Allocate() {
-        switch (allocation_type) {
-        case AllocationType::Host:
-            // Fallback for cases where we do not yet support allocating guest memory from the slab
-            // heap, such as for kernel memory regions.
-            return new T;
-
-        case AllocationType::Guest:
-            T* obj = static_cast<T*>(AllocateImpl());
-            if (obj != nullptr) {
-                new (obj) T();
-            }
-            return obj;
-        }
+        T* obj = static_cast<T*>(BaseHeap::Allocate());
 
-        UNREACHABLE_MSG("Invalid AllocationType {}", allocation_type);
-        return nullptr;
+        if (obj != nullptr) [[likely]] {
+            std::construct_at(obj);
+        }
+        return obj;
     }
 
-    T* AllocateWithKernel(KernelCore& kernel) {
-        switch (allocation_type) {
-        case AllocationType::Host:
-            // Fallback for cases where we do not yet support allocating guest memory from the slab
-            // heap, such as for kernel memory regions.
-            return new T(kernel);
+    T* Allocate(KernelCore& kernel) {
+        T* obj = static_cast<T*>(BaseHeap::Allocate());
 
-        case AllocationType::Guest:
-            T* obj = static_cast<T*>(AllocateImpl());
-            if (obj != nullptr) {
-                new (obj) T(kernel);
-            }
-            return obj;
+        if (obj != nullptr) [[likely]] {
+            std::construct_at(obj, kernel);
         }
-
-        UNREACHABLE_MSG("Invalid AllocationType {}", allocation_type);
-        return nullptr;
+        return obj;
     }
 
     void Free(T* obj) {
-        switch (allocation_type) {
-        case AllocationType::Host:
-            // Fallback for cases where we do not yet support allocating guest memory from the slab
-            // heap, such as for kernel memory regions.
-            delete obj;
-            return;
-
-        case AllocationType::Guest:
-            FreeImpl(obj);
-            return;
-        }
-
-        UNREACHABLE_MSG("Invalid AllocationType {}", allocation_type);
+        BaseHeap::Free(obj);
     }
 
-    constexpr std::size_t GetObjectIndex(const T* obj) const {
-        return GetObjectIndexImpl(obj);
+    size_t GetObjectIndex(const T* obj) const {
+        return BaseHeap::GetObjectIndex(obj);
     }
-
-private:
-    const AllocationType allocation_type;
 };
 
 } // namespace Kernel
diff --git a/src/core/hle/kernel/k_thread.cpp b/src/core/hle/kernel/k_thread.cpp
index de3ffe0c7..ba7f72c6b 100644
--- a/src/core/hle/kernel/k_thread.cpp
+++ b/src/core/hle/kernel/k_thread.cpp
@@ -210,7 +210,7 @@ ResultCode KThread::Initialize(KThreadFunction func, uintptr_t arg, VAddr user_s
     if (owner != nullptr) {
         // Setup the TLS, if needed.
         if (type == ThreadType::User) {
-            tls_address = owner->CreateTLSRegion();
+            R_TRY(owner->CreateThreadLocalRegion(std::addressof(tls_address)));
         }
 
         parent = owner;
@@ -305,7 +305,7 @@ void KThread::Finalize() {
 
     // If the thread has a local region, delete it.
     if (tls_address != 0) {
-        parent->FreeTLSRegion(tls_address);
+        ASSERT(parent->DeleteThreadLocalRegion(tls_address).IsSuccess());
     }
 
     // Release any waiters.
@@ -326,6 +326,9 @@ void KThread::Finalize() {
         }
     }
 
+    // Release host emulation members.
+    host_context.reset();
+
     // Perform inherited finalization.
     KSynchronizationObject::Finalize();
 }
diff --git a/src/core/hle/kernel/k_thread.h b/src/core/hle/kernel/k_thread.h
index d058db62c..f46db7298 100644
--- a/src/core/hle/kernel/k_thread.h
+++ b/src/core/hle/kernel/k_thread.h
@@ -656,7 +656,7 @@ private:
     static_assert(sizeof(SyncObjectBuffer::sync_objects) == sizeof(SyncObjectBuffer::handles));
 
     struct ConditionVariableComparator {
-        struct LightCompareType {
+        struct RedBlackKeyType {
             u64 cv_key{};
             s32 priority{};
 
@@ -672,8 +672,8 @@ private:
         template <typename T>
         requires(
             std::same_as<T, KThread> ||
-            std::same_as<T, LightCompareType>) static constexpr int Compare(const T& lhs,
-                                                                            const KThread& rhs) {
+            std::same_as<T, RedBlackKeyType>) static constexpr int Compare(const T& lhs,
+                                                                           const KThread& rhs) {
             const u64 l_key = lhs.GetConditionVariableKey();
             const u64 r_key = rhs.GetConditionVariableKey();
 
diff --git a/src/core/hle/kernel/k_thread_local_page.cpp b/src/core/hle/kernel/k_thread_local_page.cpp
new file mode 100644
index 000000000..4653c29f6
--- /dev/null
+++ b/src/core/hle/kernel/k_thread_local_page.cpp
@@ -0,0 +1,65 @@
+// Copyright 2022 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/scope_exit.h"
+#include "core/hle/kernel/k_memory_block.h"
+#include "core/hle/kernel/k_page_table.h"
+#include "core/hle/kernel/k_process.h"
+#include "core/hle/kernel/k_thread_local_page.h"
+#include "core/hle/kernel/kernel.h"
+
+namespace Kernel {
+
+ResultCode KThreadLocalPage::Initialize(KernelCore& kernel, KProcess* process) {
+    // Set that this process owns us.
+    m_owner = process;
+    m_kernel = &kernel;
+
+    // Allocate a new page.
+    KPageBuffer* page_buf = KPageBuffer::Allocate(kernel);
+    R_UNLESS(page_buf != nullptr, ResultOutOfMemory);
+    auto page_buf_guard = SCOPE_GUARD({ KPageBuffer::Free(kernel, page_buf); });
+
+    // Map the address in.
+    const auto phys_addr = kernel.System().DeviceMemory().GetPhysicalAddr(page_buf);
+    R_TRY(m_owner->PageTable().MapPages(std::addressof(m_virt_addr), 1, PageSize, phys_addr,
+                                        KMemoryState::ThreadLocal,
+                                        KMemoryPermission::UserReadWrite));
+
+    // We succeeded.
+    page_buf_guard.Cancel();
+
+    return ResultSuccess;
+}
+
+ResultCode KThreadLocalPage::Finalize() {
+    // Get the physical address of the page.
+    const PAddr phys_addr = m_owner->PageTable().GetPhysicalAddr(m_virt_addr);
+    ASSERT(phys_addr);
+
+    // Unmap the page.
+    R_TRY(m_owner->PageTable().UnmapPages(this->GetAddress(), 1, KMemoryState::ThreadLocal));
+
+    // Free the page.
+    KPageBuffer::Free(*m_kernel, KPageBuffer::FromPhysicalAddress(m_kernel->System(), phys_addr));
+
+    return ResultSuccess;
+}
+
+VAddr KThreadLocalPage::Reserve() {
+    for (size_t i = 0; i < m_is_region_free.size(); i++) {
+        if (m_is_region_free[i]) {
+            m_is_region_free[i] = false;
+            return this->GetRegionAddress(i);
+        }
+    }
+
+    return 0;
+}
+
+void KThreadLocalPage::Release(VAddr addr) {
+    m_is_region_free[this->GetRegionIndex(addr)] = true;
+}
+
+} // namespace Kernel
diff --git a/src/core/hle/kernel/k_thread_local_page.h b/src/core/hle/kernel/k_thread_local_page.h
new file mode 100644
index 000000000..658c67e94
--- /dev/null
+++ b/src/core/hle/kernel/k_thread_local_page.h
@@ -0,0 +1,112 @@
+// Copyright 2022 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <algorithm>
+#include <array>
+
+#include "common/alignment.h"
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "common/intrusive_red_black_tree.h"
+#include "core/hle/kernel/k_page_buffer.h"
+#include "core/hle/kernel/memory_types.h"
+#include "core/hle/kernel/slab_helpers.h"
+#include "core/hle/result.h"
+
+namespace Kernel {
+
+class KernelCore;
+class KProcess;
+
+class KThreadLocalPage final : public Common::IntrusiveRedBlackTreeBaseNode<KThreadLocalPage>,
+                               public KSlabAllocated<KThreadLocalPage> {
+public:
+    static constexpr size_t RegionsPerPage = PageSize / Svc::ThreadLocalRegionSize;
+    static_assert(RegionsPerPage > 0);
+
+public:
+    constexpr explicit KThreadLocalPage(VAddr addr = {}) : m_virt_addr(addr) {
+        m_is_region_free.fill(true);
+    }
+
+    constexpr VAddr GetAddress() const {
+        return m_virt_addr;
+    }
+
+    ResultCode Initialize(KernelCore& kernel, KProcess* process);
+    ResultCode Finalize();
+
+    VAddr Reserve();
+    void Release(VAddr addr);
+
+    bool IsAllUsed() const {
+        return std::ranges::all_of(m_is_region_free.begin(), m_is_region_free.end(),
+                                   [](bool is_free) { return !is_free; });
+    }
+
+    bool IsAllFree() const {
+        return std::ranges::all_of(m_is_region_free.begin(), m_is_region_free.end(),
+                                   [](bool is_free) { return is_free; });
+    }
+
+    bool IsAnyUsed() const {
+        return !this->IsAllFree();
+    }
+
+    bool IsAnyFree() const {
+        return !this->IsAllUsed();
+    }
+
+public:
+    using RedBlackKeyType = VAddr;
+
+    static constexpr RedBlackKeyType GetRedBlackKey(const RedBlackKeyType& v) {
+        return v;
+    }
+    static constexpr RedBlackKeyType GetRedBlackKey(const KThreadLocalPage& v) {
+        return v.GetAddress();
+    }
+
+    template <typename T>
+    requires(std::same_as<T, KThreadLocalPage> ||
+             std::same_as<T, RedBlackKeyType>) static constexpr int Compare(const T& lhs,
+                                                                            const KThreadLocalPage&
+                                                                                rhs) {
+        const VAddr lval = GetRedBlackKey(lhs);
+        const VAddr rval = GetRedBlackKey(rhs);
+
+        if (lval < rval) {
+            return -1;
+        } else if (lval == rval) {
+            return 0;
+        } else {
+            return 1;
+        }
+    }
+
+private:
+    constexpr VAddr GetRegionAddress(size_t i) const {
+        return this->GetAddress() + i * Svc::ThreadLocalRegionSize;
+    }
+
+    constexpr bool Contains(VAddr addr) const {
+        return this->GetAddress() <= addr && addr < this->GetAddress() + PageSize;
+    }
+
+    constexpr size_t GetRegionIndex(VAddr addr) const {
+        ASSERT(Common::IsAligned(addr, Svc::ThreadLocalRegionSize));
+        ASSERT(this->Contains(addr));
+        return (addr - this->GetAddress()) / Svc::ThreadLocalRegionSize;
+    }
+
+private:
+    VAddr m_virt_addr{};
+    KProcess* m_owner{};
+    KernelCore* m_kernel{};
+    std::array<bool, RegionsPerPage> m_is_region_free{};
+};
+
+} // namespace Kernel
diff --git a/src/core/hle/kernel/kernel.cpp b/src/core/hle/kernel/kernel.cpp
index 71bd466cf..f9828bc43 100644
--- a/src/core/hle/kernel/kernel.cpp
+++ b/src/core/hle/kernel/kernel.cpp
@@ -52,7 +52,7 @@ namespace Kernel {
 
 struct KernelCore::Impl {
     explicit Impl(Core::System& system_, KernelCore& kernel_)
-        : time_manager{system_}, object_list_container{kernel_},
+        : time_manager{system_},
           service_threads_manager{1, "yuzu:ServiceThreadsManager"}, system{system_} {}
 
     void SetMulticore(bool is_multi) {
@@ -60,6 +60,7 @@ struct KernelCore::Impl {
     }
 
     void Initialize(KernelCore& kernel) {
+        global_object_list_container = std::make_unique<KAutoObjectWithListContainer>(kernel);
         global_scheduler_context = std::make_unique<Kernel::GlobalSchedulerContext>(kernel);
         global_handle_table = std::make_unique<Kernel::KHandleTable>(kernel);
         global_handle_table->Initialize(KHandleTable::MaxTableSize);
@@ -76,7 +77,7 @@ struct KernelCore::Impl {
         // Initialize kernel memory and resources.
         InitializeSystemResourceLimit(kernel, system.CoreTiming());
         InitializeMemoryLayout();
-        InitializePageSlab();
+        Init::InitializeKPageBufferSlabHeap(system);
         InitializeSchedulers();
         InitializeSuspendThreads();
         InitializePreemption(kernel);
@@ -107,19 +108,6 @@ struct KernelCore::Impl {
         for (auto* server_port : server_ports_) {
             server_port->Close();
         }
-        // Close all open server sessions.
-        std::unordered_set<KServerSession*> server_sessions_;
-        {
-            std::lock_guard lk(server_sessions_lock);
-            server_sessions_ = server_sessions;
-            server_sessions.clear();
-        }
-        for (auto* server_session : server_sessions_) {
-            server_session->Close();
-        }
-
-        // Ensure that the object list container is finalized and properly shutdown.
-        object_list_container.Finalize();
 
         // Ensures all service threads gracefully shutdown.
         ClearServiceThreads();
@@ -194,11 +182,15 @@ struct KernelCore::Impl {
         {
             std::lock_guard lk(registered_objects_lock);
             if (registered_objects.size()) {
-                LOG_WARNING(Kernel, "{} kernel objects were dangling on shutdown!",
-                            registered_objects.size());
+                LOG_DEBUG(Kernel, "{} kernel objects were dangling on shutdown!",
+                          registered_objects.size());
                 registered_objects.clear();
             }
         }
+
+        // Ensure that the object list container is finalized and properly shutdown.
+        global_object_list_container->Finalize();
+        global_object_list_container.reset();
     }
 
     void InitializePhysicalCores() {
@@ -291,15 +283,16 @@ struct KernelCore::Impl {
 
     // Gets the dummy KThread for the caller, allocating a new one if this is the first time
     KThread* GetHostDummyThread() {
-        auto make_thread = [this]() {
-            KThread* thread = KThread::Create(system.Kernel());
+        auto initialize = [this](KThread* thread) {
             ASSERT(KThread::InitializeDummyThread(thread).IsSuccess());
             thread->SetName(fmt::format("DummyThread:{}", GetHostThreadId()));
             return thread;
         };
 
-        thread_local KThread* saved_thread = make_thread();
-        return saved_thread;
+        thread_local auto raw_thread = KThread(system.Kernel());
+        thread_local auto thread = initialize(&raw_thread);
+
+        return thread;
     }
 
     /// Registers a CPU core thread by allocating a host thread ID for it
@@ -660,22 +653,6 @@ struct KernelCore::Impl {
                                     time_phys_addr, time_size, "Time:SharedMemory");
     }
 
-    void InitializePageSlab() {
-        // Allocate slab heaps
-        user_slab_heap_pages =
-            std::make_unique<KSlabHeap<Page>>(KSlabHeap<Page>::AllocationType::Guest);
-
-        // TODO(ameerj): This should be derived, not hardcoded within the kernel
-        constexpr u64 user_slab_heap_size{0x3de000};
-        // Reserve slab heaps
-        ASSERT(
-            system_resource_limit->Reserve(LimitableResource::PhysicalMemory, user_slab_heap_size));
-        // Initialize slab heap
-        user_slab_heap_pages->Initialize(
-            system.DeviceMemory().GetPointer(Core::DramMemoryMap::SlabHeapBase),
-            user_slab_heap_size);
-    }
-
     KClientPort* CreateNamedServicePort(std::string name) {
         auto search = service_interface_factory.find(name);
         if (search == service_interface_factory.end()) {
@@ -713,7 +690,6 @@ struct KernelCore::Impl {
     }
 
     std::mutex server_ports_lock;
-    std::mutex server_sessions_lock;
     std::mutex registered_objects_lock;
     std::mutex registered_in_use_objects_lock;
 
@@ -737,14 +713,13 @@ struct KernelCore::Impl {
     // stores all the objects in place.
     std::unique_ptr<KHandleTable> global_handle_table;
 
-    KAutoObjectWithListContainer object_list_container;
+    std::unique_ptr<KAutoObjectWithListContainer> global_object_list_container;
 
     /// Map of named ports managed by the kernel, which can be retrieved using
     /// the ConnectToPort SVC.
     std::unordered_map<std::string, ServiceInterfaceFactory> service_interface_factory;
     NamedPortTable named_ports;
     std::unordered_set<KServerPort*> server_ports;
-    std::unordered_set<KServerSession*> server_sessions;
     std::unordered_set<KAutoObject*> registered_objects;
     std::unordered_set<KAutoObject*> registered_in_use_objects;
 
@@ -756,7 +731,6 @@ struct KernelCore::Impl {
 
     // Kernel memory management
     std::unique_ptr<KMemoryManager> memory_manager;
-    std::unique_ptr<KSlabHeap<Page>> user_slab_heap_pages;
 
     // Shared memory for services
     Kernel::KSharedMemory* hid_shared_mem{};
@@ -915,11 +889,11 @@ const Core::ExclusiveMonitor& KernelCore::GetExclusiveMonitor() const {
 }
 
 KAutoObjectWithListContainer& KernelCore::ObjectListContainer() {
-    return impl->object_list_container;
+    return *impl->global_object_list_container;
 }
 
 const KAutoObjectWithListContainer& KernelCore::ObjectListContainer() const {
-    return impl->object_list_container;
+    return *impl->global_object_list_container;
 }
 
 void KernelCore::InvalidateAllInstructionCaches() {
@@ -949,16 +923,6 @@ KClientPort* KernelCore::CreateNamedServicePort(std::string name) {
     return impl->CreateNamedServicePort(std::move(name));
 }
 
-void KernelCore::RegisterServerSession(KServerSession* server_session) {
-    std::lock_guard lk(impl->server_sessions_lock);
-    impl->server_sessions.insert(server_session);
-}
-
-void KernelCore::UnregisterServerSession(KServerSession* server_session) {
-    std::lock_guard lk(impl->server_sessions_lock);
-    impl->server_sessions.erase(server_session);
-}
-
 void KernelCore::RegisterKernelObject(KAutoObject* object) {
     std::lock_guard lk(impl->registered_objects_lock);
     impl->registered_objects.insert(object);
@@ -1031,14 +995,6 @@ const KMemoryManager& KernelCore::MemoryManager() const {
     return *impl->memory_manager;
 }
 
-KSlabHeap<Page>& KernelCore::GetUserSlabHeapPages() {
-    return *impl->user_slab_heap_pages;
-}
-
-const KSlabHeap<Page>& KernelCore::GetUserSlabHeapPages() const {
-    return *impl->user_slab_heap_pages;
-}
-
 Kernel::KSharedMemory& KernelCore::GetHidSharedMem() {
     return *impl->hid_shared_mem;
 }
diff --git a/src/core/hle/kernel/kernel.h b/src/core/hle/kernel/kernel.h
index c1254b18d..7087bbda6 100644
--- a/src/core/hle/kernel/kernel.h
+++ b/src/core/hle/kernel/kernel.h
@@ -43,6 +43,7 @@ class KHandleTable;
 class KLinkedListNode;
 class KMemoryLayout;
 class KMemoryManager;
+class KPageBuffer;
 class KPort;
 class KProcess;
 class KResourceLimit;
@@ -52,6 +53,7 @@ class KSession;
 class KSharedMemory;
 class KSharedMemoryInfo;
 class KThread;
+class KThreadLocalPage;
 class KTransferMemory;
 class KWorkerTaskManager;
 class KWritableEvent;
@@ -194,14 +196,6 @@ public:
     /// Opens a port to a service previously registered with RegisterNamedService.
     KClientPort* CreateNamedServicePort(std::string name);
 
-    /// Registers a server session with the gobal emulation state, to be freed on shutdown. This is
-    /// necessary because we do not emulate processes for HLE sessions.
-    void RegisterServerSession(KServerSession* server_session);
-
-    /// Unregisters a server session previously registered with RegisterServerSession when it was
-    /// destroyed during the current emulation session.
-    void UnregisterServerSession(KServerSession* server_session);
-
     /// Registers all kernel objects with the global emulation state, this is purely for tracking
     /// leaks after emulation has been shutdown.
     void RegisterKernelObject(KAutoObject* object);
@@ -239,12 +233,6 @@ public:
     /// Gets the virtual memory manager for the kernel.
     const KMemoryManager& MemoryManager() const;
 
-    /// Gets the slab heap allocated for user space pages.
-    KSlabHeap<Page>& GetUserSlabHeapPages();
-
-    /// Gets the slab heap allocated for user space pages.
-    const KSlabHeap<Page>& GetUserSlabHeapPages() const;
-
     /// Gets the shared memory object for HID services.
     Kernel::KSharedMemory& GetHidSharedMem();
 
@@ -336,6 +324,10 @@ public:
             return slab_heap_container->writeable_event;
         } else if constexpr (std::is_same_v<T, KCodeMemory>) {
             return slab_heap_container->code_memory;
+        } else if constexpr (std::is_same_v<T, KPageBuffer>) {
+            return slab_heap_container->page_buffer;
+        } else if constexpr (std::is_same_v<T, KThreadLocalPage>) {
+            return slab_heap_container->thread_local_page;
         }
     }
 
@@ -397,6 +389,8 @@ private:
         KSlabHeap<KTransferMemory> transfer_memory;
         KSlabHeap<KWritableEvent> writeable_event;
         KSlabHeap<KCodeMemory> code_memory;
+        KSlabHeap<KPageBuffer> page_buffer;
+        KSlabHeap<KThreadLocalPage> thread_local_page;
     };
 
     std::unique_ptr<SlabHeapContainer> slab_heap_container;
diff --git a/src/core/hle/kernel/service_thread.cpp b/src/core/hle/kernel/service_thread.cpp
index 4eb3a5988..52d25b837 100644
--- a/src/core/hle/kernel/service_thread.cpp
+++ b/src/core/hle/kernel/service_thread.cpp
@@ -49,12 +49,9 @@ ServiceThread::Impl::Impl(KernelCore& kernel, std::size_t num_threads, const std
                 return;
             }
 
+            // Allocate a dummy guest thread for this host thread.
             kernel.RegisterHostThread();
 
-            // Ensure the dummy thread allocated for this host thread is closed on exit.
-            auto* dummy_thread = kernel.GetCurrentEmuThread();
-            SCOPE_EXIT({ dummy_thread->Close(); });
-
             while (true) {
                 std::function<void()> task;
 
diff --git a/src/core/hle/kernel/slab_helpers.h b/src/core/hle/kernel/slab_helpers.h
index f1c11256e..dc1e48fc9 100644
--- a/src/core/hle/kernel/slab_helpers.h
+++ b/src/core/hle/kernel/slab_helpers.h
@@ -59,7 +59,7 @@ class KAutoObjectWithSlabHeapAndContainer : public Base {
 
 private:
     static Derived* Allocate(KernelCore& kernel) {
-        return kernel.SlabHeap<Derived>().AllocateWithKernel(kernel);
+        return kernel.SlabHeap<Derived>().Allocate(kernel);
     }
 
     static void Free(KernelCore& kernel, Derived* obj) {
diff --git a/src/core/hle/kernel/svc_types.h b/src/core/hle/kernel/svc_types.h
index 365e22e4e..b2e9ec092 100644
--- a/src/core/hle/kernel/svc_types.h
+++ b/src/core/hle/kernel/svc_types.h
@@ -96,4 +96,6 @@ constexpr inline s32 IdealCoreNoUpdate = -3;
 constexpr inline s32 LowestThreadPriority = 63;
 constexpr inline s32 HighestThreadPriority = 0;
 
+constexpr inline size_t ThreadLocalRegionSize = 0x200;
+
 } // namespace Kernel::Svc