11 files changed, 270 insertions, 125 deletions

diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 0252c8c31..5afdeb5ff 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -226,6 +226,7 @@ add_library(core STATIC
     hle/kernel/k_page_buffer.h
     hle/kernel/k_page_heap.cpp
     hle/kernel/k_page_heap.h
+    hle/kernel/k_page_group.cpp
     hle/kernel/k_page_group.h
     hle/kernel/k_page_table.cpp
     hle/kernel/k_page_table.h
diff --git a/src/core/hle/kernel/k_code_memory.cpp b/src/core/hle/kernel/k_code_memory.cpp
index 4b1c134d4..d9da1e600 100644
--- a/src/core/hle/kernel/k_code_memory.cpp
+++ b/src/core/hle/kernel/k_code_memory.cpp
@@ -27,13 +27,13 @@ Result KCodeMemory::Initialize(Core::DeviceMemory& device_memory, VAddr addr, si
     auto& page_table = m_owner->PageTable();
 
     // Construct the page group.
-    m_page_group = {};
+    m_page_group.emplace(kernel, page_table.GetBlockInfoManager());
 
     // Lock the memory.
-    R_TRY(page_table.LockForCodeMemory(&m_page_group, addr, size))
+    R_TRY(page_table.LockForCodeMemory(std::addressof(*m_page_group), addr, size))
 
     // Clear the memory.
-    for (const auto& block : m_page_group.Nodes()) {
+    for (const auto& block : *m_page_group) {
         std::memset(device_memory.GetPointer<void>(block.GetAddress()), 0xFF, block.GetSize());
     }
 
@@ -51,12 +51,13 @@ Result KCodeMemory::Initialize(Core::DeviceMemory& device_memory, VAddr addr, si
 void KCodeMemory::Finalize() {
     // Unlock.
     if (!m_is_mapped && !m_is_owner_mapped) {
-        const size_t size = m_page_group.GetNumPages() * PageSize;
-        m_owner->PageTable().UnlockForCodeMemory(m_address, size, m_page_group);
+        const size_t size = m_page_group->GetNumPages() * PageSize;
+        m_owner->PageTable().UnlockForCodeMemory(m_address, size, *m_page_group);
     }
 
     // Close the page group.
-    m_page_group = {};
+    m_page_group->Close();
+    m_page_group->Finalize();
 
     // Close our reference to our owner.
     m_owner->Close();
@@ -64,7 +65,7 @@ void KCodeMemory::Finalize() {
 
 Result KCodeMemory::Map(VAddr address, size_t size) {
     // Validate the size.
-    R_UNLESS(m_page_group.GetNumPages() == Common::DivideUp(size, PageSize), ResultInvalidSize);
+    R_UNLESS(m_page_group->GetNumPages() == Common::DivideUp(size, PageSize), ResultInvalidSize);
 
     // Lock ourselves.
     KScopedLightLock lk(m_lock);
@@ -74,7 +75,7 @@ Result KCodeMemory::Map(VAddr address, size_t size) {
 
     // Map the memory.
     R_TRY(kernel.CurrentProcess()->PageTable().MapPages(
-        address, m_page_group, KMemoryState::CodeOut, KMemoryPermission::UserReadWrite));
+        address, *m_page_group, KMemoryState::CodeOut, KMemoryPermission::UserReadWrite));
 
     // Mark ourselves as mapped.
     m_is_mapped = true;
@@ -84,13 +85,13 @@ Result KCodeMemory::Map(VAddr address, size_t size) {
 
 Result KCodeMemory::Unmap(VAddr address, size_t size) {
     // Validate the size.
-    R_UNLESS(m_page_group.GetNumPages() == Common::DivideUp(size, PageSize), ResultInvalidSize);
+    R_UNLESS(m_page_group->GetNumPages() == Common::DivideUp(size, PageSize), ResultInvalidSize);
 
     // Lock ourselves.
     KScopedLightLock lk(m_lock);
 
     // Unmap the memory.
-    R_TRY(kernel.CurrentProcess()->PageTable().UnmapPages(address, m_page_group,
+    R_TRY(kernel.CurrentProcess()->PageTable().UnmapPages(address, *m_page_group,
                                                           KMemoryState::CodeOut));
 
     // Mark ourselves as unmapped.
@@ -101,7 +102,7 @@ Result KCodeMemory::Unmap(VAddr address, size_t size) {
 
 Result KCodeMemory::MapToOwner(VAddr address, size_t size, Svc::MemoryPermission perm) {
     // Validate the size.
-    R_UNLESS(m_page_group.GetNumPages() == Common::DivideUp(size, PageSize), ResultInvalidSize);
+    R_UNLESS(m_page_group->GetNumPages() == Common::DivideUp(size, PageSize), ResultInvalidSize);
 
     // Lock ourselves.
     KScopedLightLock lk(m_lock);
@@ -125,7 +126,7 @@ Result KCodeMemory::MapToOwner(VAddr address, size_t size, Svc::MemoryPermission
 
     // Map the memory.
     R_TRY(
-        m_owner->PageTable().MapPages(address, m_page_group, KMemoryState::GeneratedCode, k_perm));
+        m_owner->PageTable().MapPages(address, *m_page_group, KMemoryState::GeneratedCode, k_perm));
 
     // Mark ourselves as mapped.
     m_is_owner_mapped = true;
@@ -135,13 +136,13 @@ Result KCodeMemory::MapToOwner(VAddr address, size_t size, Svc::MemoryPermission
 
 Result KCodeMemory::UnmapFromOwner(VAddr address, size_t size) {
     // Validate the size.
-    R_UNLESS(m_page_group.GetNumPages() == Common::DivideUp(size, PageSize), ResultInvalidSize);
+    R_UNLESS(m_page_group->GetNumPages() == Common::DivideUp(size, PageSize), ResultInvalidSize);
 
     // Lock ourselves.
     KScopedLightLock lk(m_lock);
 
     // Unmap the memory.
-    R_TRY(m_owner->PageTable().UnmapPages(address, m_page_group, KMemoryState::GeneratedCode));
+    R_TRY(m_owner->PageTable().UnmapPages(address, *m_page_group, KMemoryState::GeneratedCode));
 
     // Mark ourselves as unmapped.
     m_is_owner_mapped = false;
diff --git a/src/core/hle/kernel/k_code_memory.h b/src/core/hle/kernel/k_code_memory.h
index 2e7e1436a..5b260b385 100644
--- a/src/core/hle/kernel/k_code_memory.h
+++ b/src/core/hle/kernel/k_code_memory.h
@@ -3,6 +3,8 @@
 
 #pragma once
 
+#include <optional>
+
 #include "common/common_types.h"
 #include "core/device_memory.h"
 #include "core/hle/kernel/k_auto_object.h"
@@ -49,11 +51,11 @@ public:
         return m_address;
     }
     size_t GetSize() const {
-        return m_is_initialized ? m_page_group.GetNumPages() * PageSize : 0;
+        return m_is_initialized ? m_page_group->GetNumPages() * PageSize : 0;
     }
 
 private:
-    KPageGroup m_page_group{};
+    std::optional<KPageGroup> m_page_group{};
     KProcess* m_owner{};
     VAddr m_address{};
     KLightLock m_lock;
diff --git a/src/core/hle/kernel/k_memory_manager.cpp b/src/core/hle/kernel/k_memory_manager.cpp
index bd33571da..cd6ea388e 100644
--- a/src/core/hle/kernel/k_memory_manager.cpp
+++ b/src/core/hle/kernel/k_memory_manager.cpp
@@ -223,7 +223,7 @@ Result KMemoryManager::AllocatePageGroupImpl(KPageGroup* out, size_t num_pages,
 
     // Ensure that we don't leave anything un-freed.
     ON_RESULT_FAILURE {
-        for (const auto& it : out->Nodes()) {
+        for (const auto& it : *out) {
             auto& manager = this->GetManager(it.GetAddress());
             const size_t node_num_pages = std::min<u64>(
                 it.GetNumPages(), (manager.GetEndAddress() - it.GetAddress()) / PageSize);
@@ -285,7 +285,7 @@ Result KMemoryManager::AllocateAndOpen(KPageGroup* out, size_t num_pages, u32 op
                                       m_has_optimized_process[static_cast<size_t>(pool)], true));
 
     // Open the first reference to the pages.
-    for (const auto& block : out->Nodes()) {
+    for (const auto& block : *out) {
         PAddr cur_address = block.GetAddress();
         size_t remaining_pages = block.GetNumPages();
         while (remaining_pages > 0) {
@@ -335,7 +335,7 @@ Result KMemoryManager::AllocateForProcess(KPageGroup* out, size_t num_pages, u32
     // Perform optimized memory tracking, if we should.
     if (optimized) {
         // Iterate over the allocated blocks.
-        for (const auto& block : out->Nodes()) {
+        for (const auto& block : *out) {
             // Get the block extents.
             const PAddr block_address = block.GetAddress();
             const size_t block_pages = block.GetNumPages();
@@ -391,7 +391,7 @@ Result KMemoryManager::AllocateForProcess(KPageGroup* out, size_t num_pages, u32
         }
     } else {
         // Set all the allocated memory.
-        for (const auto& block : out->Nodes()) {
+        for (const auto& block : *out) {
             std::memset(m_system.DeviceMemory().GetPointer<void>(block.GetAddress()), fill_pattern,
                         block.GetSize());
         }
diff --git a/src/core/hle/kernel/k_page_group.cpp b/src/core/hle/kernel/k_page_group.cpp
new file mode 100644
index 000000000..d8c644a33
--- /dev/null
+++ b/src/core/hle/kernel/k_page_group.cpp
@@ -0,0 +1,121 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "core/hle/kernel/k_dynamic_resource_manager.h"
+#include "core/hle/kernel/k_memory_manager.h"
+#include "core/hle/kernel/k_page_group.h"
+#include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/svc_results.h"
+
+namespace Kernel {
+
+void KPageGroup::Finalize() {
+    KBlockInfo* cur = m_first_block;
+    while (cur != nullptr) {
+        KBlockInfo* next = cur->GetNext();
+        m_manager->Free(cur);
+        cur = next;
+    }
+
+    m_first_block = nullptr;
+    m_last_block = nullptr;
+}
+
+void KPageGroup::CloseAndReset() {
+    auto& mm = m_kernel.MemoryManager();
+
+    KBlockInfo* cur = m_first_block;
+    while (cur != nullptr) {
+        KBlockInfo* next = cur->GetNext();
+        mm.Close(cur->GetAddress(), cur->GetNumPages());
+        m_manager->Free(cur);
+        cur = next;
+    }
+
+    m_first_block = nullptr;
+    m_last_block = nullptr;
+}
+
+size_t KPageGroup::GetNumPages() const {
+    size_t num_pages = 0;
+
+    for (const auto& it : *this) {
+        num_pages += it.GetNumPages();
+    }
+
+    return num_pages;
+}
+
+Result KPageGroup::AddBlock(KPhysicalAddress addr, size_t num_pages) {
+    // Succeed immediately if we're adding no pages.
+    R_SUCCEED_IF(num_pages == 0);
+
+    // Check for overflow.
+    ASSERT(addr < addr + num_pages * PageSize);
+
+    // Try to just append to the last block.
+    if (m_last_block != nullptr) {
+        R_SUCCEED_IF(m_last_block->TryConcatenate(addr, num_pages));
+    }
+
+    // Allocate a new block.
+    KBlockInfo* new_block = m_manager->Allocate();
+    R_UNLESS(new_block != nullptr, ResultOutOfResource);
+
+    // Initialize the block.
+    new_block->Initialize(addr, num_pages);
+
+    // Add the block to our list.
+    if (m_last_block != nullptr) {
+        m_last_block->SetNext(new_block);
+    } else {
+        m_first_block = new_block;
+    }
+    m_last_block = new_block;
+
+    R_SUCCEED();
+}
+
+void KPageGroup::Open() const {
+    auto& mm = m_kernel.MemoryManager();
+
+    for (const auto& it : *this) {
+        mm.Open(it.GetAddress(), it.GetNumPages());
+    }
+}
+
+void KPageGroup::OpenFirst() const {
+    auto& mm = m_kernel.MemoryManager();
+
+    for (const auto& it : *this) {
+        mm.OpenFirst(it.GetAddress(), it.GetNumPages());
+    }
+}
+
+void KPageGroup::Close() const {
+    auto& mm = m_kernel.MemoryManager();
+
+    for (const auto& it : *this) {
+        mm.Close(it.GetAddress(), it.GetNumPages());
+    }
+}
+
+bool KPageGroup::IsEquivalentTo(const KPageGroup& rhs) const {
+    auto lit = this->begin();
+    auto rit = rhs.begin();
+    auto lend = this->end();
+    auto rend = rhs.end();
+
+    while (lit != lend && rit != rend) {
+        if (*lit != *rit) {
+            return false;
+        }
+
+        ++lit;
+        ++rit;
+    }
+
+    return lit == lend && rit == rend;
+}
+
+} // namespace Kernel
diff --git a/src/core/hle/kernel/k_page_group.h b/src/core/hle/kernel/k_page_group.h
index 316f172f2..b0b243e7d 100644
--- a/src/core/hle/kernel/k_page_group.h
+++ b/src/core/hle/kernel/k_page_group.h
@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
@@ -13,24 +13,22 @@
 
 namespace Kernel {
 
+class KBlockInfoManager;
 class KPageGroup;
 
 class KBlockInfo {
-private:
-    friend class KPageGroup;
-
 public:
-    constexpr KBlockInfo() = default;
+    constexpr explicit KBlockInfo() : m_next(nullptr) {}
 
-    constexpr void Initialize(PAddr addr, size_t np) {
+    constexpr void Initialize(KPhysicalAddress addr, size_t np) {
         ASSERT(Common::IsAligned(addr, PageSize));
         ASSERT(static_cast<u32>(np) == np);
 
-        m_page_index = static_cast<u32>(addr) / PageSize;
+        m_page_index = static_cast<u32>(addr / PageSize);
         m_num_pages = static_cast<u32>(np);
     }
 
-    constexpr PAddr GetAddress() const {
+    constexpr KPhysicalAddress GetAddress() const {
         return m_page_index * PageSize;
     }
     constexpr size_t GetNumPages() const {
@@ -39,10 +37,10 @@ public:
     constexpr size_t GetSize() const {
         return this->GetNumPages() * PageSize;
     }
-    constexpr PAddr GetEndAddress() const {
+    constexpr KPhysicalAddress GetEndAddress() const {
         return (m_page_index + m_num_pages) * PageSize;
     }
-    constexpr PAddr GetLastAddress() const {
+    constexpr KPhysicalAddress GetLastAddress() const {
         return this->GetEndAddress() - 1;
     }
 
@@ -62,8 +60,8 @@ public:
         return !(*this == rhs);
     }
 
-    constexpr bool IsStrictlyBefore(PAddr addr) const {
-        const PAddr end = this->GetEndAddress();
+    constexpr bool IsStrictlyBefore(KPhysicalAddress addr) const {
+        const KPhysicalAddress end = this->GetEndAddress();
 
         if (m_page_index != 0 && end == 0) {
             return false;
@@ -72,11 +70,11 @@ public:
         return end < addr;
     }
 
-    constexpr bool operator<(PAddr addr) const {
+    constexpr bool operator<(KPhysicalAddress addr) const {
         return this->IsStrictlyBefore(addr);
     }
 
-    constexpr bool TryConcatenate(PAddr addr, size_t np) {
+    constexpr bool TryConcatenate(KPhysicalAddress addr, size_t np) {
         if (addr != 0 && addr == this->GetEndAddress()) {
             m_num_pages += static_cast<u32>(np);
             return true;
@@ -90,96 +88,118 @@ private:
     }
 
 private:
+    friend class KPageGroup;
+
     KBlockInfo* m_next{};
     u32 m_page_index{};
     u32 m_num_pages{};
 };
 static_assert(sizeof(KBlockInfo) <= 0x10);
 
-class KPageGroup final {
+class KPageGroup {
 public:
-    class Node final {
+    class Iterator {
     public:
-        constexpr Node(u64 addr_, std::size_t num_pages_) : addr{addr_}, num_pages{num_pages_} {}
+        using iterator_category = std::forward_iterator_tag;
+        using value_type = const KBlockInfo;
+        using difference_type = std::ptrdiff_t;
+        using pointer = value_type*;
+        using reference = value_type&;
+
+        constexpr explicit Iterator(pointer n) : m_node(n) {}
+
+        constexpr bool operator==(const Iterator& rhs) const {
+            return m_node == rhs.m_node;
+        }
+        constexpr bool operator!=(const Iterator& rhs) const {
+            return !(*this == rhs);
+        }
 
-        constexpr u64 GetAddress() const {
-            return addr;
+        constexpr pointer operator->() const {
+            return m_node;
+        }
+        constexpr reference operator*() const {
+            return *m_node;
         }
 
-        constexpr std::size_t GetNumPages() const {
-            return num_pages;
+        constexpr Iterator& operator++() {
+            m_node = m_node->GetNext();
+            return *this;
         }
 
-        constexpr std::size_t GetSize() const {
-            return GetNumPages() * PageSize;
+        constexpr Iterator operator++(int) {
+            const Iterator it{*this};
+            ++(*this);
+            return it;
         }
 
     private:
-        u64 addr{};
-        std::size_t num_pages{};
+        pointer m_node{};
     };
 
-public:
-    KPageGroup() = default;
-    KPageGroup(u64 address, u64 num_pages) {
-        ASSERT(AddBlock(address, num_pages).IsSuccess());
+    explicit KPageGroup(KernelCore& kernel, KBlockInfoManager* m)
+        : m_kernel{kernel}, m_manager{m} {}
+    ~KPageGroup() {
+        this->Finalize();
     }
 
-    constexpr std::list<Node>& Nodes() {
-        return nodes;
-    }
+    void CloseAndReset();
+    void Finalize();
 
-    constexpr const std::list<Node>& Nodes() const {
-        return nodes;
+    Iterator begin() const {
+        return Iterator{m_first_block};
+    }
+    Iterator end() const {
+        return Iterator{nullptr};
+    }
+    bool empty() const {
+        return m_first_block == nullptr;
     }
 
-    std::size_t GetNumPages() const {
-        std::size_t num_pages = 0;
-        for (const Node& node : nodes) {
-            num_pages += node.GetNumPages();
-        }
-        return num_pages;
-    }
-
-    bool IsEqual(KPageGroup& other) const {
-        auto this_node = nodes.begin();
-        auto other_node = other.nodes.begin();
-        while (this_node != nodes.end() && other_node != other.nodes.end()) {
-            if (this_node->GetAddress() != other_node->GetAddress() ||
-                this_node->GetNumPages() != other_node->GetNumPages()) {
-                return false;
-            }
-            this_node = std::next(this_node);
-            other_node = std::next(other_node);
-        }
+    Result AddBlock(KPhysicalAddress addr, size_t num_pages);
+    void Open() const;
+    void OpenFirst() const;
+    void Close() const;
+
+    size_t GetNumPages() const;
+
+    bool IsEquivalentTo(const KPageGroup& rhs) const;
+
+    bool operator==(const KPageGroup& rhs) const {
+        return this->IsEquivalentTo(rhs);
+    }
 
-        return this_node == nodes.end() && other_node == other.nodes.end();
+    bool operator!=(const KPageGroup& rhs) const {
+        return !(*this == rhs);
     }
 
-    Result AddBlock(u64 address, u64 num_pages) {
-        if (!num_pages) {
-            return ResultSuccess;
+private:
+    KernelCore& m_kernel;
+    KBlockInfo* m_first_block{};
+    KBlockInfo* m_last_block{};
+    KBlockInfoManager* m_manager{};
+};
+
+class KScopedPageGroup {
+public:
+    explicit KScopedPageGroup(const KPageGroup* gp) : m_pg(gp) {
+        if (m_pg) {
+            m_pg->Open();
         }
-        if (!nodes.empty()) {
-            const auto node = nodes.back();
-            if (node.GetAddress() + node.GetNumPages() * PageSize == address) {
-                address = node.GetAddress();
-                num_pages += node.GetNumPages();
-                nodes.pop_back();
-            }
+    }
+    explicit KScopedPageGroup(const KPageGroup& gp) : KScopedPageGroup(std::addressof(gp)) {}
+    ~KScopedPageGroup() {
+        if (m_pg) {
+            m_pg->Close();
         }
-        nodes.push_back({address, num_pages});
-        return ResultSuccess;
     }
 
-    bool Empty() const {
-        return nodes.empty();
+    void CancelClose() {
+        m_pg = nullptr;
     }
 
-    void Finalize() {}
-
 private:
-    std::list<Node> nodes;
+    const KPageGroup* m_pg{};
 };
 
 } // namespace Kernel
diff --git a/src/core/hle/kernel/k_page_table.cpp b/src/core/hle/kernel/k_page_table.cpp
index 612fc76fa..83131774c 100644
--- a/src/core/hle/kernel/k_page_table.cpp
+++ b/src/core/hle/kernel/k_page_table.cpp
@@ -100,7 +100,7 @@ constexpr size_t GetAddressSpaceWidthFromType(FileSys::ProgramAddressSpaceType a
 
 KPageTable::KPageTable(Core::System& system_)
     : m_general_lock{system_.Kernel()},
-      m_map_physical_memory_lock{system_.Kernel()}, m_system{system_} {}
+      m_map_physical_memory_lock{system_.Kernel()}, m_system{system_}, m_kernel{system_.Kernel()} {}
 
 KPageTable::~KPageTable() = default;
 
@@ -373,7 +373,7 @@ Result KPageTable::MapProcessCode(VAddr addr, size_t num_pages, KMemoryState sta
                                                  m_memory_block_slab_manager);
 
     // Allocate and open.
-    KPageGroup pg;
+    KPageGroup pg{m_kernel, m_block_info_manager};
     R_TRY(m_system.Kernel().MemoryManager().AllocateAndOpen(
         &pg, num_pages,
         KMemoryManager::EncodeOption(KMemoryManager::Pool::Application, m_allocation_option)));
@@ -432,7 +432,7 @@ Result KPageTable::MapCodeMemory(VAddr dst_address, VAddr src_address, size_t si
         const size_t num_pages = size / PageSize;
 
         // Create page groups for the memory being mapped.
-        KPageGroup pg;
+        KPageGroup pg{m_kernel, m_block_info_manager};
         AddRegionToPages(src_address, num_pages, pg);
 
         // Reprotect the source as kernel-read/not mapped.
@@ -593,7 +593,7 @@ Result KPageTable::MakePageGroup(KPageGroup& pg, VAddr addr, size_t num_pages) {
     const size_t size = num_pages * PageSize;
 
     // We're making a new group, not adding to an existing one.
-    R_UNLESS(pg.Empty(), ResultInvalidCurrentMemory);
+    R_UNLESS(pg.empty(), ResultInvalidCurrentMemory);
 
     // Begin traversal.
     Common::PageTable::TraversalContext context;
@@ -640,11 +640,10 @@ Result KPageTable::MakePageGroup(KPageGroup& pg, VAddr addr, size_t num_pages) {
     R_SUCCEED();
 }
 
-bool KPageTable::IsValidPageGroup(const KPageGroup& pg_ll, VAddr addr, size_t num_pages) {
+bool KPageTable::IsValidPageGroup(const KPageGroup& pg, VAddr addr, size_t num_pages) {
     ASSERT(this->IsLockedByCurrentThread());
 
     const size_t size = num_pages * PageSize;
-    const auto& pg = pg_ll.Nodes();
     const auto& memory_layout = m_system.Kernel().MemoryLayout();
 
     // Empty groups are necessarily invalid.
@@ -1572,7 +1571,7 @@ Result KPageTable::MapPhysicalMemory(VAddr address, size_t size) {
             R_UNLESS(memory_reservation.Succeeded(), ResultLimitReached);
 
             // Allocate pages for the new memory.
-            KPageGroup pg;
+            KPageGroup pg{m_kernel, m_block_info_manager};
             R_TRY(m_system.Kernel().MemoryManager().AllocateForProcess(
                 &pg, (size - mapped_size) / PageSize, m_allocate_option, 0, 0));
 
@@ -1650,7 +1649,7 @@ Result KPageTable::MapPhysicalMemory(VAddr address, size_t size) {
                 KScopedPageTableUpdater updater(this);
 
                 // Prepare to iterate over the memory.
-                auto pg_it = pg.Nodes().begin();
+                auto pg_it = pg.begin();
                 PAddr pg_phys_addr = pg_it->GetAddress();
                 size_t pg_pages = pg_it->GetNumPages();
 
@@ -1703,7 +1702,7 @@ Result KPageTable::MapPhysicalMemory(VAddr address, size_t size) {
                     // Release any remaining unmapped memory.
                     m_system.Kernel().MemoryManager().OpenFirst(pg_phys_addr, pg_pages);
                     m_system.Kernel().MemoryManager().Close(pg_phys_addr, pg_pages);
-                    for (++pg_it; pg_it != pg.Nodes().end(); ++pg_it) {
+                    for (++pg_it; pg_it != pg.end(); ++pg_it) {
                         m_system.Kernel().MemoryManager().OpenFirst(pg_it->GetAddress(),
                                                                     pg_it->GetNumPages());
                         m_system.Kernel().MemoryManager().Close(pg_it->GetAddress(),
@@ -1731,7 +1730,7 @@ Result KPageTable::MapPhysicalMemory(VAddr address, size_t size) {
                             // Check if we're at the end of the physical block.
                             if (pg_pages == 0) {
                                 // Ensure there are more pages to map.
-                                ASSERT(pg_it != pg.Nodes().end());
+                                ASSERT(pg_it != pg.end());
 
                                 // Advance our physical block.
                                 ++pg_it;
@@ -1955,7 +1954,7 @@ Result KPageTable::MapMemory(VAddr dst_address, VAddr src_address, size_t size)
     R_TRY(dst_allocator_result);
 
     // Map the memory.
-    KPageGroup page_linked_list;
+    KPageGroup page_linked_list{m_kernel, m_block_info_manager};
     const size_t num_pages{size / PageSize};
     const KMemoryPermission new_src_perm = static_cast<KMemoryPermission>(
         KMemoryPermission::KernelRead | KMemoryPermission::NotMapped);
@@ -2022,14 +2021,14 @@ Result KPageTable::UnmapMemory(VAddr dst_address, VAddr src_address, size_t size
                                                      num_dst_allocator_blocks);
     R_TRY(dst_allocator_result);
 
-    KPageGroup src_pages;
-    KPageGroup dst_pages;
+    KPageGroup src_pages{m_kernel, m_block_info_manager};
+    KPageGroup dst_pages{m_kernel, m_block_info_manager};
     const size_t num_pages{size / PageSize};
 
     AddRegionToPages(src_address, num_pages, src_pages);
     AddRegionToPages(dst_address, num_pages, dst_pages);
 
-    R_UNLESS(dst_pages.IsEqual(src_pages), ResultInvalidMemoryRegion);
+    R_UNLESS(dst_pages.IsEquivalentTo(src_pages), ResultInvalidMemoryRegion);
 
     {
         auto block_guard = detail::ScopeExit([&] { MapPages(dst_address, dst_pages, dst_perm); });
@@ -2060,7 +2059,7 @@ Result KPageTable::MapPages(VAddr addr, const KPageGroup& page_linked_list,
 
     VAddr cur_addr{addr};
 
-    for (const auto& node : page_linked_list.Nodes()) {
+    for (const auto& node : page_linked_list) {
         if (const auto result{
                 Operate(cur_addr, node.GetNumPages(), perm, OperationType::Map, node.GetAddress())};
             result.IsError()) {
@@ -2160,7 +2159,7 @@ Result KPageTable::UnmapPages(VAddr addr, const KPageGroup& page_linked_list) {
 
     VAddr cur_addr{addr};
 
-    for (const auto& node : page_linked_list.Nodes()) {
+    for (const auto& node : page_linked_list) {
         if (const auto result{Operate(cur_addr, node.GetNumPages(), KMemoryPermission::None,
                                       OperationType::Unmap)};
             result.IsError()) {
@@ -2527,13 +2526,13 @@ Result KPageTable::SetHeapSize(VAddr* out, size_t size) {
     R_UNLESS(memory_reservation.Succeeded(), ResultLimitReached);
 
     // Allocate pages for the heap extension.
-    KPageGroup pg;
+    KPageGroup pg{m_kernel, m_block_info_manager};
     R_TRY(m_system.Kernel().MemoryManager().AllocateAndOpen(
         &pg, allocation_size / PageSize,
         KMemoryManager::EncodeOption(m_memory_pool, m_allocation_option)));
 
     // Clear all the newly allocated pages.
-    for (const auto& it : pg.Nodes()) {
+    for (const auto& it : pg) {
         std::memset(m_system.DeviceMemory().GetPointer<void>(it.GetAddress()), m_heap_fill_value,
                     it.GetSize());
     }
@@ -2610,7 +2609,7 @@ ResultVal<VAddr> KPageTable::AllocateAndMapMemory(size_t needed_num_pages, size_
     if (is_map_only) {
         R_TRY(Operate(addr, needed_num_pages, perm, OperationType::Map, map_addr));
     } else {
-        KPageGroup page_group;
+        KPageGroup page_group{m_kernel, m_block_info_manager};
         R_TRY(m_system.Kernel().MemoryManager().AllocateForProcess(
             &page_group, needed_num_pages,
             KMemoryManager::EncodeOption(m_memory_pool, m_allocation_option), 0, 0));
@@ -2795,7 +2794,7 @@ Result KPageTable::Operate(VAddr addr, size_t num_pages, const KPageGroup& page_
     ASSERT(num_pages > 0);
     ASSERT(num_pages == page_group.GetNumPages());
 
-    for (const auto& node : page_group.Nodes()) {
+    for (const auto& node : page_group) {
         const size_t size{node.GetNumPages() * PageSize};
 
         switch (operation) {
diff --git a/src/core/hle/kernel/k_page_table.h b/src/core/hle/kernel/k_page_table.h
index f1ca785d7..5df5ba1a9 100644
--- a/src/core/hle/kernel/k_page_table.h
+++ b/src/core/hle/kernel/k_page_table.h
@@ -107,6 +107,10 @@ public:
         return *m_page_table_impl;
     }
 
+    KBlockInfoManager* GetBlockInfoManager() {
+        return m_block_info_manager;
+    }
+
     bool CanContain(VAddr addr, size_t size, KMemoryState state) const;
 
 protected:
@@ -488,6 +492,7 @@ private:
     std::unique_ptr<Common::PageTable> m_page_table_impl;
 
     Core::System& m_system;
+    KernelCore& m_kernel;
 };
 
 } // namespace Kernel
diff --git a/src/core/hle/kernel/k_shared_memory.cpp b/src/core/hle/kernel/k_shared_memory.cpp
index 0aa68103c..3cf2b5d91 100644
--- a/src/core/hle/kernel/k_shared_memory.cpp
+++ b/src/core/hle/kernel/k_shared_memory.cpp
@@ -13,10 +13,7 @@
 namespace Kernel {
 
 KSharedMemory::KSharedMemory(KernelCore& kernel_) : KAutoObjectWithSlabHeapAndContainer{kernel_} {}
-
-KSharedMemory::~KSharedMemory() {
-    kernel.GetSystemResourceLimit()->Release(LimitableResource::PhysicalMemoryMax, size);
-}
+KSharedMemory::~KSharedMemory() = default;
 
 Result KSharedMemory::Initialize(Core::DeviceMemory& device_memory_, KProcess* owner_process_,
                                  Svc::MemoryPermission owner_permission_,
@@ -49,7 +46,8 @@ Result KSharedMemory::Initialize(Core::DeviceMemory& device_memory_, KProcess* o
     R_UNLESS(physical_address != 0, ResultOutOfMemory);
 
     //! Insert the result into our page group.
-    page_group.emplace(physical_address, num_pages);
+    page_group.emplace(kernel, &kernel.GetSystemSystemResource().GetBlockInfoManager());
+    page_group->AddBlock(physical_address, num_pages);
 
     // Commit our reservation.
     memory_reservation.Commit();
@@ -62,7 +60,7 @@ Result KSharedMemory::Initialize(Core::DeviceMemory& device_memory_, KProcess* o
     is_initialized = true;
 
     // Clear all pages in the memory.
-    for (const auto& block : page_group->Nodes()) {
+    for (const auto& block : *page_group) {
         std::memset(device_memory_.GetPointer<void>(block.GetAddress()), 0, block.GetSize());
     }
 
@@ -71,13 +69,8 @@ Result KSharedMemory::Initialize(Core::DeviceMemory& device_memory_, KProcess* o
 
 void KSharedMemory::Finalize() {
     // Close and finalize the page group.
-    // page_group->Close();
-    // page_group->Finalize();
-
-    //! HACK: Manually close.
-    for (const auto& block : page_group->Nodes()) {
-        kernel.MemoryManager().Close(block.GetAddress(), block.GetNumPages());
-    }
+    page_group->Close();
+    page_group->Finalize();
 
     // Release the memory reservation.
     resource_limit->Release(LimitableResource::PhysicalMemoryMax, size);
diff --git a/src/core/hle/kernel/memory_types.h b/src/core/hle/kernel/memory_types.h
index 3975507bd..92b8b37ac 100644
--- a/src/core/hle/kernel/memory_types.h
+++ b/src/core/hle/kernel/memory_types.h
@@ -14,4 +14,7 @@ constexpr std::size_t PageSize{1 << PageBits};
 
 using Page = std::array<u8, PageSize>;
 
+using KPhysicalAddress = PAddr;
+using KProcessAddress = VAddr;
+
 } // namespace Kernel
diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp
index 788ee2160..aca442196 100644
--- a/src/core/hle/kernel/svc.cpp
+++ b/src/core/hle/kernel/svc.cpp
@@ -1485,7 +1485,7 @@ static Result MapProcessMemory(Core::System& system, VAddr dst_address, Handle p
              ResultInvalidMemoryRegion);
 
     // Create a new page group.
-    KPageGroup pg;
+    KPageGroup pg{system.Kernel(), dst_pt.GetBlockInfoManager()};
     R_TRY(src_pt.MakeAndOpenPageGroup(
         std::addressof(pg), src_address, size / PageSize, KMemoryState::FlagCanMapProcess,
         KMemoryState::FlagCanMapProcess, KMemoryPermission::None, KMemoryPermission::None,