LRU-cache NCZBLOCK blocks for faster update boots

Restores performance but need to check TOTK item icons and Jamboree graphic issues.

- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions).
- [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md)
- [x] I have read and followed the [Coding Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/Coding.md) to the best of my ability.

-------------------

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4512
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Reviewed-by: Shinmegumi <shinmegumi@eden-emu.dev>

.gitignore

@@ -7,6 +7,7 @@
 # Build directory
 /[Bb]uild*/
 doc-build/
+out/
 AppDir/
 uruntime
 

cpmfile.json

@@ -351,13 +351,13 @@
     },
     "zstd": {
         "find_args": "MODULE",
-        "hash": "cc5ad4b119a9c2ea57f0b71eeff01113bb506e0d17000159c5409cb8236d22e38c52d5e9e97e7947a4bf1b2dfc44b6c503ab2d9aedbd59458435c6a2849cb029",
+        "hash": "2b006c3c110c38bd2f5896b42d36a38931c8eae261f30552f9a9fd04458d218d8f1a1425f117fd12af545ed77042e4b2d1a1a9b6286c4d0b9d74ef79f20a8f08",
         "min_version": "1.5",
         "options": [
             "ZSTD_BUILD_SHARED OFF"
         ],
         "repo": "facebook/zstd",
         "source_subdir": "build/cmake",
-        "version": "b8d6101fba"
+        "version": "33618c8"
     }
 }

src/android/app/src/main/java/org/yuzu/yuzu_emu/features/settings/model/BooleanSetting.kt

@@ -16,7 +16,6 @@ enum class BooleanSetting(override val key: String) : AbstractBooleanSetting {
     RENDERER_USE_SPEED_LIMIT("use_speed_limit"),
     USE_CUSTOM_CPU_TICKS("use_custom_cpu_ticks"),
     SKIP_CPU_INNER_INVALIDATION("skip_cpu_inner_invalidation"),
-    NCE_INVALIDATION_GPU_READBACK("nce_invalidation_gpu_readback"),
     FIX_BLOOM_EFFECTS("fix_bloom_effects"),
     EMULATE_BGR565("emulate_bgr565"),
     RESCALE_HACK("rescale_hack"),

src/android/app/src/main/java/org/yuzu/yuzu_emu/features/settings/model/view/SettingsItem.kt

@@ -859,13 +859,6 @@ abstract class SettingsItem(
                     descriptionId = R.string.skip_cpu_inner_invalidation_description
                 )
             )
-            put(
-                SwitchSetting(
-                    BooleanSetting.NCE_INVALIDATION_GPU_READBACK,
-                    titleId = R.string.nce_invalidation_gpu_readback,
-                    descriptionId = R.string.nce_invalidation_gpu_readback_description
-                )
-            )
             put(
                 SwitchSetting(
                     BooleanSetting.FIX_BLOOM_EFFECTS,

src/android/app/src/main/java/org/yuzu/yuzu_emu/features/settings/ui/SettingsFragmentPresenter.kt

@@ -554,7 +554,6 @@ class SettingsFragmentPresenter(
             add(HeaderSetting(R.string.hacks))
 
             add(BooleanSetting.SKIP_CPU_INNER_INVALIDATION.key)
-            add(BooleanSetting.NCE_INVALIDATION_GPU_READBACK.key)
             add(BooleanSetting.FIX_BLOOM_EFFECTS.key)
             add(BooleanSetting.EMULATE_BGR565.key)
             add(BooleanSetting.RENDERER_ASYNCHRONOUS_SHADERS.key)

src/android/app/src/main/java/org/yuzu/yuzu_emu/model/Game.kt

@@ -100,7 +100,7 @@ class Game(
 
     companion object {
         val extensions: Set<String> = HashSet(
-            listOf("xci", "nsp", "nca", "nro")
+            listOf("xci", "nsp", "nca", "nro", "nsz", "xcz")
         )
     }
 }

src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/GameHelper.kt

@@ -109,7 +109,7 @@ object GameHelper {
 
     // File extensions considered as external content, buuut should
     // be done better imo.
-    private val externalContentExtensions = setOf("nsp", "xci")
+    private val externalContentExtensions = setOf("nsp", "xci", "nsz", "xcz")
 
     private fun scanContentContainersRecursive(
         files: Array<MinimalDocumentFile>,

src/android/app/src/main/jni/game_metadata.cpp

@@ -76,7 +76,9 @@ jboolean Java_org_yuzu_yuzu_1emu_utils_GameMetadata_getIsValid(JNIEnv* env, jobj
             auto const file_type = loader->GetFileType();
             if (file_type == Loader::FileType::Unknown || file_type == Loader::FileType::Error)
                 return false;
-            if ((file_type == Loader::FileType::NSP || file_type == Loader::FileType::XCI) && !Loader::IsBootableGameContainer(file, file_type))
+            if ((file_type == Loader::FileType::NSP || file_type == Loader::FileType::XCI ||
+                 file_type == Loader::FileType::NSZ || file_type == Loader::FileType::XCZ) &&
+                !Loader::IsBootableGameContainer(file, file_type))
                 return false;
             u64 program_id = 0;
             return loader->ReadProgramId(program_id) == Loader::ResultStatus::Success;

src/android/app/src/main/res/values-ar/strings.xml

@@ -587,8 +587,6 @@
     <string name="fast_gpu_time_description">يجعل اللعبة تعتقد أن عمل وحدة معالجة الرسومات ينتهي بشكل أسرع مما هو عليه في الواقع، لذلك تتوقف عن خفض الدقة ومسافة العرض لتتناسب مع سرعات جهاز Switch.</string>
     <string name="skip_cpu_inner_invalidation">تخطي إبطال صلاحية وحدة المعالجة المركزية الداخلية</string>
     <string name="skip_cpu_inner_invalidation_description">يتخطى بعض عمليات إبطال ذاكرة التخزين المؤقتة من جانب وحدة المعالجة المركزية أثناء تحديثات الذاكرة، مما يقلل من استخدام وحدة المعالجة المركزية ويحسن أداءها. قد يتسبب ذلك في حدوث أعطال أو تعطل في بعض الألعاب.</string>
-    <string name="nce_invalidation_gpu_readback">إعادة قراءة وحدة معالجة الرسومات قبل إبطال صلاحية NCE</string>
-    <string name="nce_invalidation_gpu_readback_description">إصلاح مؤقت. يعالج مشكلة تعطل لعبة Ender Magnolia (وغيرها من ألعاب UE). قد يؤدي إلى انخفاض في الأداء. يجري العمل على تحسينه.</string>
     <string name="fix_bloom_effects">إصلاح تأثيرات التوهج</string>
     <string name="fix_bloom_effects_description">يقلل من ضبابية التوهج في LA/EOW  (Adreno A6XX - A7XX/ Turnip)، ويزيل التوهج في Burnout. تحذير: قد يسبب تشوهات رسومية في ألعاب أخرى.</string>
     <string name="emulate_bgr565">محاكاة BGR565</string>

src/android/app/src/main/res/values-zh-rTW/strings.xml

@@ -577,8 +577,6 @@
     <string name="fast_gpu_time_description">讓遊戲誤以為 GPU 工作能更快完成，避免遊戲為了配合 Switch 的時脈而降低解析度與渲染距離</string>
     <string name="skip_cpu_inner_invalidation">跳過 CPU 內部失效處理</string>
     <string name="skip_cpu_inner_invalidation_description">在記憶體更新期間跳過某些 CPU 端快取的失效處理，減少 CPU 使用率並提高其性能。可能會導致某些遊戲出現故障或當機</string>
-    <string name="nce_invalidation_gpu_readback">在 NCE 無效化前進行 GPU 回讀</string>
-    <string name="nce_invalidation_gpu_readback_description">（暫時性功能）修復 \"終結者瑪格諾莉亞：霧中綻放\" 及其它使用虛幻引擎之遊戲中的當機問題，可能會降低效能。此功能正在改善中</string>
     <string name="fix_bloom_effects">修正光暈特效</string>
     <string name="fix_bloom_effects_description">在 \"薩爾達傳說：織夢島\" 和 \"薩爾達傳說：智慧的再現\" 中減少光暈模糊的問題並移除 \"橫衝直撞：狂飆樂園重製版\" 中的光暈效果（適用於 Adreno A6XX - A7XX/ Turnip）。警告：可能會在其它遊戲中導致圖形異常</string>
     <string name="emulate_bgr565">模擬 BGR565</string>

src/android/app/src/main/res/values/strings.xml

@@ -593,8 +593,6 @@
     <string name="fast_gpu_time_description">Makes the game believe GPU work finishes faster than it does, so it stops lowering resolution and render distance to fit the Switch\'s clocks.</string>
     <string name="skip_cpu_inner_invalidation">Skip CPU Inner Invalidation</string>
     <string name="skip_cpu_inner_invalidation_description">Skips certain CPU-side cache invalidations during memory updates, reducing CPU usage and improving it\'s performance. This may cause glitches or crashes on some games.</string>
-    <string name="nce_invalidation_gpu_readback">GPU Readback Before NCE Invalidation</string>
-    <string name="nce_invalidation_gpu_readback_description">Temporary. Fix Ender Magnolia (and other UE titles) crashes. May reduce performance. Improvement in progress.</string>
     <string name="fix_bloom_effects">Fix Bloom Effects</string>
     <string name="fix_bloom_effects_description">Reduces bloom blur in LA/EOW (Adreno A6XX - A7XX/ Turnip), removes bloom in Burnout. Warning: may cause graphical artifacts in other games.</string>
     <string name="emulate_bgr565">Emulate BGR565</string>

src/common/settings.h

@@ -639,8 +639,6 @@ struct Values {
                                                         Specialization::Default,
                                                         true,
                                                         true};
-    SwitchableSetting<bool> nce_invalidation_gpu_readback{
-        linkage, false, "nce_invalidation_gpu_readback", Category::RendererHacks};
     SwitchableSetting<bool> async_presentation{linkage,
 #ifdef __ANDROID__
                                                true,

src/common/zstd_compression.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -46,4 +49,10 @@ std::vector<u8> DecompressDataZSTD(std::span<const u8> compressed) {
     return decompressed;
 }
 
+std::size_t DecompressDataZSTD(std::span<const u8> compressed, std::span<u8> output) {
+    const std::size_t result =
+        ZSTD_decompress(output.data(), output.size(), compressed.data(), compressed.size());
+    return ZSTD_isError(result) ? 0 : result;
+}
+
 } // namespace Common::Compression

src/common/zstd_compression.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -42,4 +45,15 @@ namespace Common::Compression {
  */
 [[nodiscard]] std::vector<u8> DecompressDataZSTD(std::span<const u8> compressed);
 
+/**
+ * Decompresses a single Zstandard frame into a caller-provided buffer of known size.
+ *
+ * @param compressed the compressed source memory region.
+ * @param output     the destination buffer. Its size is the maximum number of bytes to write.
+ *
+ * @return the number of bytes written, or 0 if the frame is invalid or doesn't fit. An empty
+ *         frame also returns 0.
+ */
+[[nodiscard]] std::size_t DecompressDataZSTD(std::span<const u8> compressed, std::span<u8> output);
+
 } // namespace Common::Compression

src/core/CMakeLists.txt

@@ -33,6 +33,8 @@ add_library(core STATIC
     crypto/encryption_layer.h
     crypto/key_manager.cpp
     crypto/key_manager.h
+    crypto/ncz_decompressor.cpp
+    crypto/ncz_decompressor.h
     crypto/partition_data_manager.cpp
     crypto/partition_data_manager.h
     crypto/xts_encryption_layer.cpp

src/core/arm/nce/arm_nce.cpp

@@ -369,8 +369,8 @@ void ArmNce::SetContext(const Kernel::Svc::ThreadContext& ctx) {
 }
 
 void ArmNce::SignalInterrupt(Kernel::KThread* thread) {
-    // Add break loop condition.
-    m_guest_ctx.esr_el1.fetch_or(static_cast<u64>(HaltReason::BreakLoop));
+    constexpr u64 break_loop = static_cast<u64>(HaltReason::BreakLoop);
+    if ((m_guest_ctx.esr_el1.fetch_or(break_loop) & break_loop) != 0) return;
 
     auto* params = &thread->GetNativeExecutionParameters();
     LockThreadParameters(params);

src/core/core.cpp

@@ -4,7 +4,6 @@
 #include <array>
 #include <atomic>
 #include <memory>
-#include <unordered_map>
 #include <utility>
 
 #include "game_settings.h"
@@ -249,30 +248,12 @@ struct System::Impl {
         }
     }
 
-    void NotifyNVDECChannelOpen(u64 process_id) {
-        std::scoped_lock lock{nvdec_active_mutex};
-        ++nvdec_active_channels[process_id];
-    }
-
-    void NotifyNVDECChannelClose(u64 process_id) {
-        std::scoped_lock lock{nvdec_active_mutex};
-        const auto it = nvdec_active_channels.find(process_id);
-        if (it == nvdec_active_channels.end()) {
-            return;
-        }
-        if (--it->second == 0) {
-            nvdec_active_channels.erase(it);
-        }
+    void SetNVDECActive(bool is_nvdec_active) {
+        nvdec_active = is_nvdec_active;
     }
 
     bool GetNVDECActive() {
-        std::scoped_lock lock{nvdec_active_mutex};
-        return !nvdec_active_channels.empty();
-    }
-
-    bool IsNVDECActiveForProcess(u64 process_id) {
-        std::scoped_lock lock{nvdec_active_mutex};
-        return nvdec_active_channels.contains(process_id);
+        return nvdec_active;
     }
 
     void InitializeDebugger(System& system, u16 port) {
@@ -528,8 +509,6 @@ struct System::Impl {
 
     mutable std::mutex suspend_guard;
     std::mutex general_channel_mutex;
-    std::mutex nvdec_active_mutex;
-    std::unordered_map<u64, u32> nvdec_active_channels;
     std::atomic_bool is_paused{};
     std::atomic_bool is_shutting_down{};
     std::atomic_bool is_powered_on{};
@@ -537,6 +516,7 @@ struct System::Impl {
     bool extended_memory_layout : 1 = false;
     bool exit_locked : 1 = false;
     bool exit_requested : 1 = false;
+    bool nvdec_active : 1 = false;
 
     void EnsureGeneralChannelInitialized(System& system) {
         if (!general_channel_event) {
@@ -600,22 +580,14 @@ void System::UnstallApplication() {
     impl->UnstallApplication();
 }
 
-void System::NotifyNVDECChannelOpen(u64 process_id) {
-    impl->NotifyNVDECChannelOpen(process_id);
-}
-
-void System::NotifyNVDECChannelClose(u64 process_id) {
-    impl->NotifyNVDECChannelClose(process_id);
+void System::SetNVDECActive(bool is_nvdec_active) {
+    impl->SetNVDECActive(is_nvdec_active);
 }
 
 bool System::GetNVDECActive() {
     return impl->GetNVDECActive();
 }
 
-bool System::IsNVDECActiveForProcess(u64 process_id) {
-    return impl->IsNVDECActiveForProcess(process_id);
-}
-
 void System::InitializeDebugger() {
     impl->InitializeDebugger(*this, Settings::values.gdbstub_port.GetValue());
 }

src/core/core.h

@@ -191,10 +191,8 @@ public:
     std::unique_lock<std::mutex> StallApplication();
     void UnstallApplication();
 
-    void NotifyNVDECChannelOpen(u64 process_id);
-    void NotifyNVDECChannelClose(u64 process_id);
+    void SetNVDECActive(bool is_nvdec_active);
     [[nodiscard]] bool GetNVDECActive();
-    [[nodiscard]] bool IsNVDECActiveForProcess(u64 process_id);
 
     /**
      * Initialize the debugger.

src/core/crypto/ncz_decompressor.cpp

@@ -0,0 +1,457 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include <algorithm>
+#include <array>
+#include <cstring>
+#include <memory>
+#include <mutex>
+#include <optional>
+#include <span>
+#include <list>
+#include <string>
+#include <vector>
+
+#include <zstd.h>
+
+#include "common/common_types.h"
+#include "common/logging.h"
+#include "common/zstd_compression.h"
+#include "core/crypto/aes_util.h"
+#include "core/crypto/key_manager.h"
+#include "core/crypto/ncz_decompressor.h"
+#include "core/file_sys/vfs/vfs.h"
+
+namespace Core::Crypto {
+
+namespace {
+
+constexpr u64 HeaderSize = 0x4000;
+constexpr std::size_t SectionWire = 0x40;
+constexpr std::size_t BlockFixed = 0x18;
+constexpr std::size_t Chunk = 0x100000;
+// Upper bound on NCZ section entries (64 bytes each, so the table is at most 4 MiB). A base NCA
+// has a handful of sections, but nsz stores an update's patch (BKTR) data one entry per
+// subsection, which is thousands of them.
+constexpr u64 MaxSectionCount = 0x10000;
+constexpr std::array<u8, 8> SectionsMagic{'N', 'C', 'Z', 'S', 'E', 'C', 'T', 'N'};
+constexpr std::array<u8, 8> BlockMagic{'N', 'C', 'Z', 'B', 'L', 'O', 'C', 'K'};
+
+struct Section {
+    s64 offset, size;
+    u64 crypto_type;
+    Key128 key, counter;
+    bool Ctr() const { return crypto_type == 3 || crypto_type == 4; }
+};
+
+struct BlockHeader {
+    u32 exponent;
+    u64 decompressed_size;
+    std::vector<u32> sizes;
+};
+
+u64 Le(const u8* p, std::size_t n) {
+    u64 v = 0;
+    for (std::size_t i = n; i-- > 0;) v = (v << 8) | p[i];
+    return v;
+}
+
+// Mirrors nsz AESCTR.seek(): upper 8 bytes = stored counter, lower 8 = absolute NCA offset / 16.
+void SetIv(Key128& iv, const Key128& base, u64 off) {
+    iv = base;
+    u64 blk = off >> 4;
+    for (std::size_t i = 0; i < 8; ++i) { iv[15 - i] = static_cast<u8>(blk & 0xFF); blk >>= 8; }
+}
+
+// Parse header + section table + optional block header. Returns payload_start.
+std::optional<std::pair<std::vector<Section>, std::optional<BlockHeader>>> ParseHeader(
+    const FileSys::VirtualFile& f, u64& payload_start) {
+    const u64 fsize = f->GetSize();
+    if (fsize < HeaderSize + 16) return std::nullopt;
+
+    const auto head = f->ReadBytes(16, HeaderSize);
+    if (head.size() != 16 || !std::equal(head.begin(), head.begin() + 8, SectionsMagic.begin()))
+        return std::nullopt;
+    const u64 count = Le(head.data() + 8, 8);
+    if (count == 0 || count > MaxSectionCount || count * SectionWire > fsize - HeaderSize - 16)
+        return std::nullopt;
+
+    const auto table = f->ReadBytes(count * SectionWire, HeaderSize + 16);
+    if (table.size() != count * SectionWire) return std::nullopt;
+
+    std::vector<Section> sections;
+    sections.reserve(count + 1);
+    for (u64 i = 0; i < count; ++i) {
+        const u8* e = table.data() + i * SectionWire;
+        Section s{};
+        s.offset = static_cast<s64>(Le(e, 8));
+        s.size = static_cast<s64>(Le(e + 8, 8));
+        s.crypto_type = Le(e + 16, 8);
+        std::memcpy(s.key.data(), e + 32, 16);
+        std::memcpy(s.counter.data(), e + 48, 16);
+        sections.push_back(s);
+    }
+
+    const u64 block_start = HeaderSize + 16 + count * SectionWire;
+    const auto fixed = f->ReadBytes(BlockFixed, block_start);
+    std::optional<BlockHeader> bh;
+    if (fixed.size() == BlockFixed &&
+        std::equal(fixed.begin(), fixed.begin() + 8, BlockMagic.begin())) {
+        BlockHeader b{};
+        b.exponent = fixed[11];
+        const s32 n = static_cast<s32>(Le(fixed.data() + 12, 4));
+        if (n <= 0) return std::nullopt;
+        b.decompressed_size = Le(fixed.data() + 16, 8);
+        const auto sizes = f->ReadBytes(static_cast<u64>(n) * 4, block_start + BlockFixed);
+        if (sizes.size() != static_cast<u64>(n) * 4) return std::nullopt;
+        b.sizes.resize(n);
+        for (s32 i = 0; i < n; ++i) b.sizes[i] = static_cast<u32>(Le(sizes.data() + i * 4, 4));
+        payload_start = block_start + BlockFixed + static_cast<u64>(n) * 4;
+        bh = std::move(b);
+    } else {
+        payload_start = block_start;
+    }
+
+    if (!sections.empty() && sections[0].offset > static_cast<s64>(HeaderSize)) {
+        Section fake{};
+        fake.offset = static_cast<s64>(HeaderSize);
+        fake.size = sections[0].offset - static_cast<s64>(HeaderSize);
+        sections.insert(sections.begin(), fake);
+    }
+    return std::make_pair(std::move(sections), std::move(bh));
+}
+
+// Sequential reader over independently-compressed blocks. Keeps a small LRU cache of recently
+// decoded blocks so random reads (e.g. update NCA with thousands of sections) don't re-decompress
+// the same block over and over.
+class BlockReader {
+public:
+    static constexpr std::size_t BlockCacheSize = 8;
+
+    BlockReader(FileSys::VirtualFile f, const BlockHeader& bh, u64 payload_start)
+        : source{std::move(f)}, block_size{1ULL << bh.exponent}, sizes{bh.sizes},
+          decompressed_size{bh.decompressed_size} {
+        if (bh.exponent < 14 || bh.exponent > 32 || sizes.empty())
+            throw std::runtime_error("bad NCZBLOCK header");
+        u64 off = payload_start;
+        offsets.reserve(sizes.size());
+        for (u32 s : sizes) { offsets.push_back(off); off += s; }
+    }
+
+    // Fills `out` from `position`; returns bytes written.
+    std::size_t ReadAt(u64 position, std::span<u8> out) {
+        std::size_t done = 0;
+        while (done < out.size() && position < decompressed_size) {
+            const u64 id = position / block_size;
+            if (id >= sizes.size()) break;
+            const std::vector<u8>* block = GetBlock(id);
+            if (block == nullptr) break;
+            const u64 in = position - id * block_size;
+            if (in >= block->size()) break;
+            const std::size_t n = static_cast<std::size_t>(
+                std::min<u64>(out.size() - done, block->size() - in));
+            std::memcpy(out.data() + done, block->data() + in, n);
+            done += n;
+            position += n;
+        }
+        return done;
+    }
+
+private:
+    const std::vector<u8>* GetBlock(u64 id) {
+        // LRU hit: move to front.
+        for (auto it = cache.begin(); it != cache.end(); ++it) {
+            if (it->first == id) {
+                cache.splice(cache.begin(), cache, it);
+                return &cache.front().second;
+            }
+        }
+
+        // Miss: decode the block.
+        std::vector<u8> buffer;
+        if (cache.size() >= BlockCacheSize) {
+            buffer = std::move(cache.back().second);
+            cache.pop_back();
+        }
+        if (!DecodeBlock(id, buffer)) {
+            return nullptr;
+        }
+        cache.emplace_front(id, std::move(buffer));
+        return &cache.front().second;
+    }
+
+    bool DecodeBlock(u64 id, std::vector<u8>& buffer) {
+        u64 want = block_size;
+        if (id + 1 == sizes.size()) {
+            const u64 rem = decompressed_size % block_size;
+            if (rem > 0) want = rem; // avoid the 0-size bug from the original nsz
+        }
+        try { buffer.resize(static_cast<std::size_t>(want)); }
+        catch (const std::bad_alloc&) { return false; }
+        const u32 csize = sizes[id];
+        if (csize < want) {
+            const auto comp = source->ReadBytes(csize, offsets[id]);
+            if (comp.size() != csize ||
+                Common::Compression::DecompressDataZSTD(comp, buffer) != want) return false;
+        } else if (source->Read(buffer.data(), buffer.size(), offsets[id]) != buffer.size()) {
+            return false;
+        }
+        return true;
+    }
+
+    FileSys::VirtualFile source;
+    u64 block_size;
+    std::vector<u64> offsets;
+    std::vector<u32> sizes;
+    u64 decompressed_size;
+    std::list<std::pair<u64, std::vector<u8>>> cache;  // LRU: front = most recent
+};
+
+class BlockNczFile final : public FileSys::VfsFile {
+public:
+    BlockNczFile(std::string name_, std::vector<u8> hdr_, std::vector<Section> sections_,
+                 std::unique_ptr<BlockReader> body_)
+        : name{std::move(name_)}, hdr{std::move(hdr_)}, sections{std::move(sections_)},
+          body{std::move(body_)} {
+        nca_size = HeaderSize;
+        for (const auto& s : sections)
+            nca_size = std::max<u64>(nca_size, static_cast<u64>(s.offset + s.size));
+        ciphers.reserve(sections.size());
+        for (const auto& s : sections)
+            ciphers.push_back(s.Ctr() ? std::make_unique<AESCipher<Key128>>(s.key, Mode::CTR)
+                                      : nullptr);
+    }
+
+    std::string GetName() const override { return name; }
+    std::size_t GetSize() const override { return static_cast<std::size_t>(nca_size); }
+    bool Resize(std::size_t) override { return false; }
+    FileSys::VirtualDir GetContainingDirectory() const override { return nullptr; }
+    bool IsWritable() const override { return false; }
+    bool IsReadable() const override { return true; }
+
+    std::size_t Read(u8* data, std::size_t len, std::size_t off) const override {
+        if (off >= nca_size) return 0;
+        len = static_cast<std::size_t>(std::min<u64>(len, nca_size - off));
+        const u64 end = off + len;
+        u64 pos = off;
+        if (pos < HeaderSize) {
+            const u64 n = std::min<u64>(end, HeaderSize) - pos;
+            std::memcpy(data, hdr.data() + pos, static_cast<std::size_t>(n));
+            pos += n;
+        }
+        std::scoped_lock lock{mutex};
+        for (std::size_t i = 0; i < sections.size() && pos < end; ++i) {
+            const auto& s = sections[i];
+            const u64 begin = std::max<u64>(static_cast<u64>(s.offset), HeaderSize);
+            const u64 stop = std::max<u64>(static_cast<u64>(s.offset + s.size), begin);
+            if (stop <= pos) continue;
+            if (pos < begin) {
+                const u64 g = std::min(end, begin);
+                std::memset(data + (pos - off), 0, static_cast<std::size_t>(g - pos));
+                pos = g;
+                if (pos >= end) break;
+            }
+            const u64 pe = std::min(end, stop);
+            const std::span<u8> piece(data + (pos - off), static_cast<std::size_t>(pe - pos));
+            if (body->ReadAt(pos - HeaderSize, piece) != piece.size())
+                return static_cast<std::size_t>(pos - off);
+            if (ciphers[i]) {
+                Key128 iv{};
+                SetIv(iv, s.counter, pos);
+                ciphers[i]->SetIV(iv);
+                ciphers[i]->Transcode(piece.data(), piece.size(), piece.data(), Op::Encrypt);
+            }
+            pos = pe;
+        }
+        return len;
+    }
+
+    std::size_t Write(const u8*, std::size_t, std::size_t) override { return 0; }
+    bool Rename(std::string_view) override { return false; }
+
+private:
+    const std::string name;
+    const std::vector<u8> hdr;
+    const std::vector<Section> sections;
+    const std::unique_ptr<BlockReader> body;
+    std::vector<std::unique_ptr<AESCipher<Key128>>> ciphers;
+    mutable std::mutex mutex;
+    u64 nca_size{};
+};
+
+// Solid NCZ: one zstd stream over the whole body. Decoded incrementally into memory, up to the
+// requested offset, so sequential install reads are O(n) instead of O(n^2).
+class SolidNczFile final : public FileSys::VfsFile {
+public:
+    SolidNczFile(std::string name_, FileSys::VirtualFile source_,
+                 std::vector<Section> sections_, u64 payload_start_)
+        : name{std::move(name_)}, source{std::move(source_)}, sections{std::move(sections_)},
+          payload_start{payload_start_} {
+        const auto raw_header = source->ReadBytes(HeaderSize, 0);
+        data.assign(raw_header.begin(), raw_header.end());
+        frontier = HeaderSize;
+    }
+
+    ~SolidNczFile() override {
+        if (stream != nullptr) ZSTD_freeDStream(stream);
+    }
+
+    std::string GetName() const override { return name; }
+    std::size_t GetSize() const override {
+        u64 size = HeaderSize;
+        for (const auto& s : sections)
+            size = std::max<u64>(size, static_cast<u64>(s.offset + s.size));
+        return static_cast<std::size_t>(size);
+    }
+    bool Resize(std::size_t) override { return false; }
+    FileSys::VirtualDir GetContainingDirectory() const override { return nullptr; }
+    bool IsWritable() const override { return false; }
+    bool IsReadable() const override { return true; }
+
+    std::size_t Read(u8* out, std::size_t len, std::size_t off) const override {
+        std::scoped_lock lock{mutex};
+        const u64 nca_size = GetSize();
+        if (off >= nca_size) return 0;
+        len = static_cast<std::size_t>(std::min<u64>(len, nca_size - off));
+        const u64 needed = off + len;
+        if (needed > frontier && !DecodeTo(needed)) return 0;
+        std::memcpy(out, data.data() + off, len);
+        return len;
+    }
+
+    std::size_t Write(const u8*, std::size_t, std::size_t) override { return 0; }
+    bool Rename(std::string_view) override { return false; }
+
+private:
+    bool DecodeTo(u64 needed) const {
+        if (stream == nullptr) {
+            stream = ZSTD_createDStream();
+            if (stream == nullptr) return false;
+            ZSTD_DCtx_setParameter(stream, ZSTD_d_windowLogMax, 31);
+            read_pos = payload_start;
+        }
+
+        const u64 file_size = source->GetSize();
+        std::vector<u8> out_buf(Chunk);
+
+        std::size_t index = 0;
+        for (; index < sections.size(); ++index) {
+            const auto& s = sections[index];
+            const u64 begin = std::max<u64>(static_cast<u64>(s.offset), HeaderSize);
+            const u64 end = std::max<u64>(static_cast<u64>(s.offset) + static_cast<u64>(s.size),
+                                          begin);
+            if (end > frontier) break;
+        }
+
+        for (; index < sections.size() && frontier < needed; ++index) {
+            const auto& s = sections[index];
+            const u64 begin = std::max<u64>(static_cast<u64>(s.offset), HeaderSize);
+            const u64 end = std::max<u64>(static_cast<u64>(s.offset) + static_cast<u64>(s.size),
+                                          begin);
+            if (end <= frontier) continue;
+            u64 pos = std::max<u64>(begin, frontier);
+
+            std::optional<AESCipher<Key128>> cipher;
+            if (s.Ctr()) cipher.emplace(s.key, Mode::CTR);
+
+            while (pos < end && frontier < needed) {
+                const u64 want = std::min<u64>(end - pos, out_buf.size());
+                std::size_t produced = 0;
+                while (produced < want) {
+                    if (in.pos >= in.size) {
+                        const u64 remaining = file_size - read_pos;
+                        const std::size_t chunk = static_cast<std::size_t>(
+                            std::min<u64>(Chunk, remaining));
+                        if (chunk == 0) { LOG_ERROR(Crypto, "Solid NCZ: truncated"); return false; }
+                        const auto bytes = source->ReadBytes(chunk, read_pos);
+                        if (bytes.empty()) { LOG_ERROR(Crypto, "Solid NCZ: truncated"); return false; }
+                        read_pos += bytes.size();
+                        in_buf.assign(bytes.begin(), bytes.end());
+                        in.src = in_buf.data();
+                        in.size = in_buf.size();
+                        in.pos = 0;
+                    }
+                    ZSTD_outBuffer outb{out_buf.data() + produced, want - produced, 0};
+                    const std::size_t res = ZSTD_decompressStream(stream, &outb, &in);
+                    if (ZSTD_isError(res)) {
+                        LOG_ERROR(Crypto, "Solid NCZ: zstd error");
+                        return false;
+                    }
+                    produced += outb.pos;
+                }
+                if (cipher) {
+                    Key128 iv{};
+                    SetIv(iv, s.counter, pos);
+                    cipher->SetIV(iv);
+                    cipher->Transcode(out_buf.data(), produced, out_buf.data(), Op::Encrypt);
+                }
+                data.insert(data.end(), out_buf.begin(), out_buf.begin() + produced);
+                pos += produced;
+                frontier = pos;
+            }
+        }
+        return frontier >= needed;
+    }
+
+    const std::string name;
+    const FileSys::VirtualFile source;
+    const std::vector<Section> sections;
+    const u64 payload_start;
+    mutable std::mutex mutex;
+    mutable std::vector<u8> data;
+    mutable ZSTD_DStream* stream = nullptr;
+    mutable u64 read_pos = 0;
+    mutable u64 frontier = 0;
+    mutable std::vector<u8> in_buf;
+    mutable ZSTD_inBuffer in{nullptr, 0, 0};
+};
+
+// Shared opener: block path always; solid only when allow_solid is true.
+FileSys::VirtualFile OpenNcz(const FileSys::VirtualFile& f, std::string_view name,
+                             bool allow_solid) {
+    if (!f) return nullptr;
+    u64 ps = 0;
+    auto parsed = ParseHeader(f, ps);
+    if (!parsed) return nullptr;
+    auto& [sections, block] = *parsed;
+
+    if (block) {
+        auto hdr = f->ReadBytes(HeaderSize, 0);
+        if (hdr.size() != HeaderSize) return nullptr;
+        std::unique_ptr<BlockReader> body;
+        try { body = std::make_unique<BlockReader>(f, *block, ps); }
+        catch (const std::exception& e) {
+            LOG_ERROR(Crypto, "Failed to open NCZBLOCK: {}", e.what());
+            return nullptr;
+        }
+        return std::make_shared<BlockNczFile>(std::string{name}, std::move(hdr),
+                                              std::move(sections), std::move(body));
+    }
+
+    if (allow_solid) {
+        return std::make_shared<SolidNczFile>(std::string{name}, f, std::move(sections), ps);
+    }
+
+    LOG_DEBUG(Crypto, "Solid NCZ {} skipped (only NCZBLOCK is supported for play)", name);
+    return nullptr;
+}
+
+} // Anonymous namespace
+
+bool IsBlockCompressedNCZ(const FileSys::VirtualFile& f) {
+    if (!f) return false;
+    u64 ps = 0;
+    const auto p = ParseHeader(f, ps);
+    return p && p->second.has_value();
+}
+
+FileSys::VirtualFile DecompressNCZ(const FileSys::VirtualFile& f, std::string_view name) {
+    return OpenNcz(f, name, /*allow_solid=*/false);
+}
+
+FileSys::VirtualFile DecompressNCZForInstall(const FileSys::VirtualFile& f,
+                                             std::string_view name) {
+    return OpenNcz(f, name, /*allow_solid=*/true);
+}
+
+} // namespace Core::Crypto

src/core/crypto/ncz_decompressor.h

@@ -0,0 +1,35 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <string_view>
+
+#include "core/file_sys/vfs/vfs_types.h"
+
+namespace Core::Crypto {
+
+/**
+ * Opens an NCZBLOCK-compressed NCA (nsz -B / .xcz block format) as a VirtualFile backed by
+ * on-demand block decoding. Nothing is written to disk; each read decodes only the blocks it
+ * covers and re-encrypts CTR sections. Solid NCZ is not supported.
+ *
+ * @param ncz_file    The raw NCZ payload (e.g. "<id>.ncz" entry from an NSZ/XCZ PFS0).
+ * @param output_name Name to give the returned VirtualFile (e.g. "<id>.nca").
+ *
+ * @return a VirtualFile for the NCA, or nullptr if the NCZ is malformed or not NCZBLOCK.
+ */
+[[nodiscard]] FileSys::VirtualFile DecompressNCZ(const FileSys::VirtualFile& ncz_file,
+                                                 std::string_view output_name);
+
+/**
+ * Returns true if the given file is an NCZ payload in block-compressed (NCZBLOCK) form,
+ * i.e. one that DecompressNCZ() can open. Solid NCZ returns false.
+ */
+[[nodiscard]] bool IsBlockCompressedNCZ(const FileSys::VirtualFile& ncz_file);
+
+// Install to NAND: same as DecompressNCZ, but solid NCZ is decoded on demand too.
+[[nodiscard]] FileSys::VirtualFile DecompressNCZForInstall(
+    const FileSys::VirtualFile& ncz_file, std::string_view output_name);
+
+} // namespace Core::Crypto

src/core/file_sys/content_archive.cpp

@@ -45,6 +45,7 @@ NCA::NCA(VirtualFile file_, const NCA* base_nca, bool allow_missing_base)
     // Ensure we have the proper key area keys to continue.
     const u8 master_key_id = MasterKeyIdForKeyGeneration(reader->GetKeyGeneration());
     if (!keys.HasKey(Core::Crypto::S128KeyType::KeyArea, master_key_id, reader->GetKeyIndex())) {
+        LOG_ERROR(Loader, "Cannot decrypt {}: keys for gen 0x{:02X}+ required.", file->GetName(), reader->GetKeyGeneration());
         status = Loader::ResultStatus::ErrorMissingKeyAreaKey;
         return;
     }

src/core/file_sys/registered_cache.cpp

@@ -16,6 +16,7 @@
 #include "common/random.h"
 #include "common/string_util.h"
 #include "core/crypto/key_manager.h"
+#include "core/crypto/ncz_decompressor.h"
 #include "core/file_sys/card_image.h"
 #include "core/file_sys/common_funcs.h"
 #include "core/file_sys/content_archive.h"
@@ -158,6 +159,25 @@ static std::shared_ptr<NSP> OpenContainerAsNsp(const VirtualFile& file, Loader::
     return nullptr;
 }
 
+// Checks that every .ncz entry in the container is NCZBLOCK. Solid NCZ has no random access,
+// and the whole point of this build is to reject it at scan time so such files never appear
+// in the game list. Containers without any .ncz (plain NSP/XCI) pass through.
+static bool ContainerIsFullyBlockCompressed(const std::shared_ptr<NSP>& nsp) {
+    if (!nsp) {
+        return false;
+    }
+    for (const auto& entry : nsp->GetFiles()) {
+        const auto name = entry->GetName();
+        if (name.size() < 4 || name.substr(name.size() - 4) != ".ncz") {
+            continue;
+        }
+        if (!Core::Crypto::IsBlockCompressedNCZ(entry)) {
+            return false; // solid NCZ -> reject the whole container
+        }
+    }
+    return true; // no .ncz at all, or all block-compressed
+}
+
 template <typename Callback>
 bool ForEachContainerEntry(const std::shared_ptr<NSP>& nsp, bool only_content,
                            std::optional<u64> base_program_id, Callback&& on_entry) {
@@ -811,7 +831,14 @@ std::vector<ContentProviderEntry> RegisteredCache::ListEntriesFilter(
 }
 
 static std::shared_ptr<NCA> GetNCAFromNSPForID(const NSP& nsp, const NcaID& id) {
-    auto file = nsp.GetFile(fmt::format("{}.nca", Common::HexToString(id, false)));
+    const auto id_string = Common::HexToString(id, false);
+    auto file = nsp.GetFile(fmt::format("{}.nca", id_string));
+    if (file == nullptr) {
+        if (auto ncz_file = nsp.GetFile(fmt::format("{}.ncz", id_string))) {
+            file = Core::Crypto::DecompressNCZForInstall(
+                ncz_file, fmt::format("{}.nca", id_string));
+        }
+    }
     if (file == nullptr) {
         return nullptr;
     }
@@ -1273,6 +1300,12 @@ bool ManualContentProvider::AddEntriesFromContainer(VirtualFile file, bool only_
         return false;
     }
 
+    // Reject solid NCZ (.nsz without -B): only block-compressed NCZ is supported.
+    if (!ContainerIsFullyBlockCompressed(nsp)) {
+        LOG_DEBUG(Service_FS, "Skipping solid-compressed container: {}", file->GetName());
+        return false;
+    }
+
     return ForEachContainerEntry(
         nsp, only_content, base_program_id,
         [this](TitleType title_type, ContentRecordType content_type, u64 title_id,
@@ -1415,8 +1448,9 @@ void ExternalContentProvider::ScanDirectory(const VirtualDir& dir) {
         }
 
         const auto extension = Common::ToLower(filename.substr(dot_pos + 1));
-
-        if (extension == "nsp") {
+        // .xcz is an XCI container, but its updates only work through the NSP/PFS0 path
+        // (DecompressNCZ), not ProcessXCI. So route .xcz here on purpose.
+        if (extension == "nsp" || extension == "nsz" || extension == "xcz") {
             ProcessNSP(file);
         } else if (extension == "xci") {
             ProcessXCI(file);
@@ -1434,6 +1468,12 @@ void ExternalContentProvider::ProcessNSP(const VirtualFile& file) {
         return;
     }
 
+    // Reject solid NCZ (.nsz without -B): Eden only supports block-compressed NCZ.
+    if (!ContainerIsFullyBlockCompressed(nsp)) {
+        LOG_DEBUG(Service_FS, "Skipping solid-compressed container: {}", file->GetName());
+        return;
+    }
+
     LOG_DEBUG(Service_FS, "Processing NSP file: {}", file->GetName());
     AddExternalEntriesFromContainer(nsp, entries, versions, multi_version_entries);
 }

src/core/file_sys/submission_package.cpp

@@ -12,6 +12,7 @@
 #include "common/hex_util.h"
 #include "common/logging.h"
 #include "core/crypto/key_manager.h"
+#include "core/crypto/ncz_decompressor.h"
 #include "core/file_sys/common_funcs.h"
 #include "core/file_sys/content_archive.h"
 #include "core/file_sys/nca_metadata.h"
@@ -246,6 +247,17 @@ void NSP::ReadNCAs(const std::vector<VirtualFile>& files) {
                 const auto id_string = Common::HexToString(rec.nca_id, false);
                 auto next_file = pfs->GetFile(fmt::format("{}.nca", id_string));
 
+                if (next_file == nullptr) {
+                    auto ncz_file = pfs->GetFile(fmt::format("{}.ncz", id_string));
+                    if (ncz_file != nullptr) {
+                        next_file = Core::Crypto::DecompressNCZ(ncz_file, fmt::format("{}.nca", id_string));
+                        if (next_file == nullptr) {
+                            LOG_DEBUG(Service_FS, "Skipping solid or unsupported NCZ content {}.ncz", id_string);
+                            continue;
+                        }
+                    }
+                }
+
                 if (next_file == nullptr) {
                     if (rec.type != ContentRecordType::DeltaFragment) {
                         LOG_WARNING(Service_FS,

src/core/hle/service/filesystem/fsp/fs_i_storage.cpp

@@ -4,6 +4,10 @@
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#include <algorithm>
+#include <chrono>
+#include <thread>
+
 #include "core/file_sys/errors.h"
 #include "core/hle/service/cmif_serialization.h"
 #include "core/hle/service/filesystem/fsp/fs_i_storage.h"
@@ -31,6 +35,14 @@ Result IStorage::Read(
     R_UNLESS(length >= 0, FileSys::ResultInvalidSize);
     R_UNLESS(offset >= 0, FileSys::ResultInvalidOffset);
 
+    const auto now = std::chrono::steady_clock::now();
+    if (now < next_read_tick) {
+        std::this_thread::sleep_for(next_read_tick - now);
+    }
+    next_read_tick = std::chrono::steady_clock::now() +
+                     std::chrono::nanoseconds{std::min(length, MaxChargedReadSize) *
+                                              1'000'000'000 / ReadBytesPerSecond};
+
     // Read the data from the Storage backend
     backend->Read(out_bytes.data(), length, offset);
 

src/core/hle/service/filesystem/fsp/fs_i_storage.h

@@ -6,6 +6,8 @@
 
 #pragma once
 
+#include <chrono>
+
 #include "core/file_sys/vfs/vfs.h"
 #include "core/hle/service/cmif_types.h"
 #include "core/hle/service/filesystem/filesystem.h"
@@ -20,6 +22,10 @@ public:
 private:
     FileSys::VirtualFile backend;
 
+    static constexpr s64 ReadBytesPerSecond = 40'000'000;
+    static constexpr s64 MaxChargedReadSize = 64 * 1024;
+    std::chrono::steady_clock::time_point next_read_tick{};
+
     Result Read(
         OutBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> out_bytes,
         s64 offset, s64 length);

src/core/hle/service/nvdrv/devices/nvhost_nvdec.cpp

@@ -8,7 +8,6 @@
 #include "common/assert.h"
 #include "common/logging.h"
 #include "core/core.h"
-#include "core/hle/kernel/k_process.h"
 #include "core/hle/service/nvdrv/core/container.h"
 #include "core/hle/service/nvdrv/devices/ioctl_serialization.h"
 #include "core/hle/service/nvdrv/devices/nvhost_nvdec.h"
@@ -72,23 +71,17 @@ NvResult nvhost_nvdec::Ioctl3(DeviceFD fd, Ioctl command, std::span<const u8> in
 
 void nvhost_nvdec::OnOpen(NvCore::SessionId session_id, DeviceFD fd) {
     LOG_INFO(Service_NVDRV, "NVDEC video stream started");
+    system.SetNVDECActive(true);
     sessions[fd] = session_id;
-    if (const auto* session = core.GetSession(session_id);
-        session != nullptr && session->process != nullptr) {
-        system.NotifyNVDECChannelOpen(session->process->GetId());
-    }
     host1x.StartDevice(fd, Tegra::Host1x::ChannelType::NvDec, channel_syncpoint);
 }
 
 void nvhost_nvdec::OnClose(DeviceFD fd) {
     LOG_INFO(Service_NVDRV, "NVDEC video stream ended");
     host1x.StopDevice(fd, Tegra::Host1x::ChannelType::NvDec);
+    system.SetNVDECActive(false);
     auto it = sessions.find(fd);
     if (it != sessions.end()) {
-        if (const auto* session = core.GetSession(it->second);
-            session != nullptr && session->process != nullptr) {
-            system.NotifyNVDECChannelClose(session->process->GetId());
-        }
         sessions.erase(it);
     }
 }

src/core/hle/service/service.cpp

@@ -4,16 +4,12 @@
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-#include <chrono>
 #include <fmt/ranges.h>
-#include <string_view>
-#include <thread>
 #include "common/assert.h"
 #include "common/logging.h"
 #include "common/settings.h"
 #include "core/core.h"
 #include "core/hle/ipc.h"
-#include "core/hle/kernel/k_process.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/service/ipc_helpers.h"
 #include "core/hle/service/service.h"
@@ -37,7 +33,6 @@ ServiceFrameworkBase::ServiceFrameworkBase(Core::System& system_, const char* se
     : SessionRequestHandler(system_.Kernel(), service_name_)
     , system{system_}
     , service_name{service_name_}
-    , is_i_storage{std::string_view{service_name_} == "IStorage"}
     , handler_invoker{handler_invoker_}
     , max_sessions{max_sessions_}
 {}
@@ -82,22 +77,13 @@ void ServiceFrameworkBase::ReportUnimplementedFunction(HLERequestContext& ctx,
 }
 
 void ServiceFrameworkBase::InvokeRequest(HLERequestContext& ctx) {
-    const auto command = ctx.GetCommand();
-    auto it = handlers.find(command);
-    const bool is_cmd_read = command == 0;
+    auto it = handlers.find(ctx.GetCommand());
     FunctionInfoBase const* info = it == handlers.end() ? nullptr : &it->second;
     if (info == nullptr || info->handler_callback == nullptr)
         return ReportUnimplementedFunction(ctx, info);
 
     LOG_TRACE(Service, "{}", MakeFunctionString(info->name, GetServiceName(), ctx.CommandBuffer()));
     handler_invoker(this, info->handler_callback, ctx);
-
-    if (is_i_storage && is_cmd_read) {
-        const auto* const process = ctx.GetThread().GetOwnerProcess();
-        if (process != nullptr && system.IsNVDECActiveForProcess(process->GetId())) {
-            std::this_thread::sleep_for(std::chrono::microseconds{600});
-        }
-    }
 }
 
 void ServiceFrameworkBase::InvokeRequestTipc(HLERequestContext& ctx) {

src/core/hle/service/service.h

@@ -107,8 +107,6 @@ protected:
     Core::System& system;
     /// Identifier string used to connect to the service.
     const char* service_name;
-    /// Whether this is the IStorage service.
-    const bool is_i_storage;
     /// Function used to safely up-cast pointers to the derived class before invoking a handler.
     InvokerFn* handler_invoker;
     /// Maximum number of concurrent sessions that this service can handle.

src/core/hle/service/sockets/bsd.cpp

@@ -40,12 +40,6 @@ bool IsConnectionBased(Type type) {
     }
 }
 
-// Size of a real BSD sockaddr_in. The guest SockAddrIn struct is padded to 0x100 so that longer
-// input addresses can be read, but an address handed back to the game is always this long.
-// Reporting 0x100 lets a game that trusts the length copy 240 bytes past its 16-byte sockaddr
-// (suspected cause of Crysis Remastered crashing ~30 s after its getsockname() call).
-constexpr size_t GuestSockAddrInSize = 16;
-
 template <typename T>
 T GetValue(std::span<const u8> buffer) {
     T t{};
@@ -661,9 +655,6 @@ std::pair<s32, Errno> BSD_USA::AcceptImpl(s32 fd, std::vector<u8>& write_buffer)
     new_descriptor.is_connection_based = descriptor.is_connection_based;
 
     const SockAddrIn guest_addr_in = Translate(result.sockaddr_in);
-    if (write_buffer.size() > GuestSockAddrInSize) {
-        write_buffer.resize(GuestSockAddrInSize);
-    }
     PutValue(write_buffer, guest_addr_in);
 
     return {new_fd, Errno::SUCCESS};
@@ -723,8 +714,8 @@ Errno BSD_USA::GetPeerNameImpl(s32 fd, std::vector<u8>& write_buffer) {
     }
     const SockAddrIn guest_addrin = Translate(addr_in);
 
-    // The reported length must be that of a real sockaddr_in, not of the padded guest struct.
-    write_buffer.resize(GuestSockAddrInSize);
+    ASSERT(write_buffer.size() >= sizeof(guest_addrin));
+    write_buffer.resize(sizeof(guest_addrin));
     PutValue(write_buffer, guest_addrin);
     return Translate(bsd_errno);
 }
@@ -745,8 +736,8 @@ Errno BSD_USA::GetSockNameImpl(s32 fd, std::vector<u8>& write_buffer) {
     }
     const SockAddrIn guest_addrin = Translate(addr_in);
 
-    // The reported length must be that of a real sockaddr_in, not of the padded guest struct.
-    write_buffer.resize(GuestSockAddrInSize);
+    ASSERT(write_buffer.size() >= sizeof(guest_addrin));
+    write_buffer.resize(sizeof(guest_addrin));
     PutValue(write_buffer, guest_addrin);
     return Translate(bsd_errno);
 }
@@ -958,9 +949,8 @@ std::pair<s32, Errno> BSD_USA::RecvFromImpl(s32 fd, u32 flags, std::vector<u8>&
         if (ret < 0) {
             addr.clear();
         } else {
-            ASSERT(addr.size() >= GuestSockAddrInSize);
+            ASSERT(addr.size() >= 16);
             const SockAddrIn result = Translate(addr_in);
-            addr.resize(GuestSockAddrInSize);
             PutValue(addr, result);
         }
     }

src/core/loader/loader.cpp

@@ -82,23 +82,27 @@ std::shared_ptr<FileSys::NSP> OpenContainerAsNsp(FileSys::VirtualFile file, File
         return nullptr;
     }
 
-    if (type == FileType::NSP) {
+    if (type == FileType::NSP || type == FileType::NSZ) {
         auto nsp = std::make_shared<FileSys::NSP>(file, program_id, program_index);
         return nsp->GetStatus() == ResultStatus::Success ? nsp : nullptr;
     }
 
-    if (type == FileType::XCI) {
+    if (type == FileType::XCI || type == FileType::XCZ) {
         FileSys::XCI xci{file, program_id, program_index};
-        if (xci.GetStatus() != ResultStatus::Success) {
-            return nullptr;
+        if (xci.GetStatus() == ResultStatus::Success) {
+            auto secure_nsp = xci.GetSecurePartitionNSP();
+            if (secure_nsp != nullptr && secure_nsp->GetStatus() == ResultStatus::Success) {
+                return secure_nsp;
+            }
         }
 
-        auto secure_nsp = xci.GetSecurePartitionNSP();
-        if (secure_nsp == nullptr || secure_nsp->GetStatus() != ResultStatus::Success) {
-            return nullptr;
+        // PFS0-shaped .xcz (NSZ-style container) does not parse as XCI; fall back to NSP.
+        if (type == FileType::XCZ) {
+            auto nsp = std::make_shared<FileSys::NSP>(file, program_id, program_index);
+            return nsp->GetStatus() == ResultStatus::Success ? nsp : nullptr;
         }
 
-        return secure_nsp;
+        return nullptr;
     }
 
     return nullptr;
@@ -144,7 +148,8 @@ FileType IdentifyFile(FileSys::VirtualFile file) {
 }
 
 bool IsContainerType(FileType type) {
-    return type == FileType::NSP || type == FileType::XCI;
+    return type == FileType::NSP || type == FileType::NSZ || type == FileType::XCI ||
+           type == FileType::XCZ;
 }
 
 bool IsBootableGameContainer(FileSys::VirtualFile file, FileType type, u64 program_id,
@@ -180,8 +185,12 @@ FileType GuessFromFilename(const std::string& name) {
         return FileType::NCA;
     else if (extension == "xci")
         return FileType::XCI;
+    else if (extension == "xcz")
+        return FileType::XCZ;
     else if (extension == "nsp")
         return FileType::NSP;
+    else if (extension == "nsz")
+        return FileType::NSZ;
     else if (extension == "kip")
         return FileType::KIP;
     return FileType::Unknown;
@@ -197,10 +206,14 @@ std::string GetFileTypeString(FileType type) {
         return "NCA";
     case FileType::XCI:
         return "XCI";
+    case FileType::XCZ:
+        return "XCZ";
     case FileType::NAX:
         return "NAX";
     case FileType::NSP:
         return "NSP";
+    case FileType::NSZ:
+        return "NSZ";
     case FileType::KIP:
         return "KIP";
     case FileType::DeconstructedRomDirectory:
@@ -326,12 +339,29 @@ static std::unique_ptr<AppLoader> GetFileLoader(Core::System& system, FileSys::V
                                                system.GetContentProvider(), program_id,
                                                program_index);
 
+    // NCZ-compressed XCI container. XCI-shaped .xcz goes to the XCI loader, while
+    // PFS0-shaped (NSZ-style) .xcz containers fall back to the NSP loader.
+    case FileType::XCZ: {
+        FileSys::XCI probe{file, program_id, program_index};
+        if (probe.GetStatus() == ResultStatus::Success &&
+            probe.GetSecurePartitionNSP() != nullptr) {
+            return std::make_unique<AppLoader_XCI>(std::move(file),
+                                                   system.GetFileSystemController(),
+                                                   system.GetContentProvider(), program_id,
+                                                   program_index);
+        }
+        return std::make_unique<AppLoader_NSP>(std::move(file), system.GetFileSystemController(),
+                                               system.GetContentProvider(), program_id,
+                                               program_index);
+    }
+
     // NX NAX (NintendoAesXts) file format.
     case FileType::NAX:
         return std::make_unique<AppLoader_NAX>(std::move(file));
 
     // NX NSP (Nintendo Submission Package) file format
     case FileType::NSP:
+    case FileType::NSZ:
         return std::make_unique<AppLoader_NSP>(std::move(file), system.GetFileSystemController(),
                                                system.GetContentProvider(), program_id,
                                                program_index);

src/core/loader/loader.h

@@ -42,7 +42,9 @@ enum class FileType {
     NRO,
     NCA,
     NSP,
+    NSZ,
     XCI,
+    XCZ,
     NAX,
     KIP,
     DeconstructedRomDirectory,

src/core/loader/nsp.cpp

@@ -56,6 +56,17 @@ AppLoader_NSP::AppLoader_NSP(FileSys::VirtualFile file_,
 AppLoader_NSP::~AppLoader_NSP() = default;
 
 FileType AppLoader_NSP::IdentifyType(const FileSys::VirtualFile& nsp_file) {
+    // .nsz is NSP-compatible; return NSZ so the game list shows the right type.
+    if (nsp_file->GetName().ends_with(".nsz")) {
+        return FileType::NSZ;
+    }
+
+    // PFS0-shaped .xcz containers are handled by this loader too; report XCZ so the game
+    // list does not show them as NSP. XCI-shaped .xcz is identified by AppLoader_XCI.
+    if (nsp_file->GetName().ends_with(".xcz")) {
+        return FileType::XCZ;
+    }
+
     const FileSys::NSP nsp(nsp_file);
 
     if (nsp.GetStatus() != ResultStatus::Success) {

src/core/loader/xci.cpp

@@ -54,7 +54,8 @@ FileType AppLoader_XCI::IdentifyType(const FileSys::VirtualFile& xci_file) {
     // Identify XCI as a valid container even when it does not include a bootable Program NCA.
     // Bootability is handled by AppLoader_XCI::Load().
     if (xci.GetSecurePartitionNSP() != nullptr) {
-        return FileType::XCI;
+        return xci_file->GetName().ends_with(".xcz") ? FileType::XCZ
+                                                     : FileType::XCI;
     }
 
     return FileType::Error;

src/frontend_common/content_manager.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: 2024 yuzu Emulator Project
@@ -163,7 +163,9 @@ inline InstallResult InstallNSP(Core::System& system, FileSys::VfsFilesystem& vf
 
     std::shared_ptr<FileSys::NSP> nsp;
     FileSys::VirtualFile file = vfs.OpenFile(filename, FileSys::OpenMode::Read);
-    if (boost::to_lower_copy(file->GetName()).ends_with("nsp")) {
+    const auto lower_name = boost::to_lower_copy(file->GetName());
+
+    if (lower_name.ends_with("nsp") || lower_name.ends_with("nsz")) {
         nsp = std::make_shared<FileSys::NSP>(file);
         if (nsp->IsExtractedType()) {
             return InstallResult::Failure;

src/qt_common/config/shared_translation.cpp

@@ -194,10 +194,6 @@ std::unique_ptr<TranslationMap> InitializeTranslations(QObject* parent) {
     INSERT(Settings, skip_cpu_inner_invalidation, tr("Skip CPU Inner Invalidation"),
            tr("Skips certain cache invalidations during memory updates, reducing CPU usage and "
               "improving latency. This may cause soft-crashes."));
-    INSERT(Settings, nce_invalidation_gpu_readback,
-           tr("GPU Readback Before NCE Invalidation"),
-           tr("Flushes GPU buffer data back to guest memory before NCE invalidates the whole "
-              "guest page, preserving it while the CPU store proceeds."));
     INSERT(Settings, vsync_mode, tr("VSync Mode:"),
            tr("FIFO (VSync) does not drop frames or exhibit tearing but is limited by the screen "
               "refresh rate.\nFIFO Relaxed allows tearing as it recovers from a slow down.\n"

src/qt_common/game_list/worker.cpp

@@ -360,7 +360,8 @@ void GameListWorker::ScanFileSystem(ScanTarget target, const std::string& dir_pa
             }
 
             if (target == ScanTarget::PopulateGameList &&
-                (file_type == Loader::FileType::XCI || file_type == Loader::FileType::NSP) &&
+                (file_type == Loader::FileType::XCI || file_type == Loader::FileType::XCZ ||
+                 file_type == Loader::FileType::NSP || file_type == Loader::FileType::NSZ) &&
                 !Loader::IsBootableGameContainer(file, file_type)) {
                 return true;
             }
@@ -375,7 +376,9 @@ void GameListWorker::ScanFileSystem(ScanTarget target, const std::string& dir_pa
                                        program_id, file);
                 } else if (Settings::values.ext_content_from_game_dirs.GetValue() &&
                            (file_type == Loader::FileType::XCI ||
-                            file_type == Loader::FileType::NSP)) {
+                            file_type == Loader::FileType::XCZ ||
+                            file_type == Loader::FileType::NSP ||
+                            file_type == Loader::FileType::NSZ)) {
                     void(provider->AddEntriesFromContainer(file));
                 }
             } else {
@@ -402,7 +405,8 @@ void GameListWorker::ScanFileSystem(ScanTarget target, const std::string& dir_pa
                 };
 
                 if (res2 == Loader::ResultStatus::Success && program_ids.size() > 1 &&
-                    (file_type == Loader::FileType::XCI || file_type == Loader::FileType::NSP)) {
+                    (file_type == Loader::FileType::XCI || file_type == Loader::FileType::XCZ ||
+                     file_type == Loader::FileType::NSP || file_type == Loader::FileType::NSZ)) {
                     for (const auto id : program_ids) {
                         // dravee suggested this, only viable way to
                         // not show sub-games in qlaunch for now.

src/qt_common/qt_common.cpp

@@ -57,7 +57,8 @@ std::unique_ptr<EmuThread> emu_thread = nullptr;
 
 const QStringList supported_file_extensions = {QStringLiteral("nro"), QStringLiteral("nso"),
                                                QStringLiteral("nca"), QStringLiteral("xci"),
-                                               QStringLiteral("nsp"), QStringLiteral("kip")};
+                                               QStringLiteral("xcz"), QStringLiteral("nsp"),
+                                               QStringLiteral("nsz"), QStringLiteral("kip")};
 
 Core::Frontend::WindowSystemType GetWindowSystemType() {
     // Determine WSI type based on Qt platform.

src/shader_recompiler/frontend/ir/breadth_first_search.h

@@ -1,8 +1,12 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 
+#include <functional>
 #include <optional>
 #include <type_traits>
 #include <queue>
@@ -13,9 +17,10 @@
 
 namespace Shader::IR {
 
-template <typename Pred>
-auto BreadthFirstSearch(const Value& value, Pred&& pred)
+template <typename Pred, typename Resolve = std::identity>
+auto BreadthFirstSearch(Value value, Pred&& pred, Resolve&& resolve = {})
     -> std::invoke_result_t<Pred, const Inst*> {
+    value = resolve(value);
     if (value.IsImmediate()) {
         // Nothing to do with immediates
         return std::nullopt;
@@ -36,7 +41,7 @@ auto BreadthFirstSearch(const Value& value, Pred&& pred)
         }
         // Visit the right most arguments first
         for (size_t arg = inst->NumArgs(); arg--;) {
-            const Value arg_value{inst->Arg(arg)};
+            const Value arg_value{resolve(inst->Arg(arg))};
             if (arg_value.IsImmediate()) {
                 continue;
             }

src/shader_recompiler/ir_opt/texture_pass.cpp

@@ -31,6 +31,60 @@ struct TextureInst {
 
 using TextureInstVector = boost::container::small_vector<TextureInst, 24>;
 
+const IR::Block* ConditionalHeader(const IR::Block* body) {
+    const auto predecessors{body->ImmPredecessors()};
+    const auto successors{body->ImmSuccessors()};
+    if (predecessors.size() != 1 || successors.size() != 1) return nullptr;
+    const IR::Block* const header{predecessors[0]};
+    const auto targets{header->ImmSuccessors()};
+    if (targets.size() != 2 || targets[0] != body || targets[1] != successors[0] ||
+        targets[1]->ImmPredecessors().size() != 2 || header->empty() ||
+        header->back().GetOpcode() != IR::Opcode::ConditionRef) {
+        return nullptr;
+    }
+    return header;
+}
+
+std::pair<IR::Value, bool> Condition(IR::Value value) {
+    bool negated{};
+    while (const IR::Inst* inst = value.TryInstRecursive()) {
+        if (inst->GetOpcode() == IR::Opcode::LogicalNot) negated = !negated;
+        else if (inst->GetOpcode() != IR::Opcode::ConditionRef) break;
+        value = inst->Arg(0);
+    }
+    return {value.Resolve(), negated};
+}
+
+IR::Value ResolveConditionalPhi(IR::Value value, const IR::Block* block) {
+    if (!value.Resolve().IsPhi() || !(block = ConditionalHeader(block))) return value;
+    const auto [condition, negated]{Condition(block->back().Arg(0))};
+    boost::container::small_vector<const IR::Block*, 16> visited;
+    while (value.Resolve().IsPhi() && std::ranges::find(visited, block) == visited.end()) {
+        visited.push_back(block);
+        const IR::Inst* const phi{value.InstRecursive()};
+        const auto predecessors{block->ImmPredecessors()};
+        if (predecessors.size() == 1) {
+            block = predecessors[0];
+            continue;
+        }
+        if (predecessors.size() != 2 || phi->NumArgs() != 2) break;
+        const IR::Block* body{predecessors[0]};
+        const IR::Block* header{ConditionalHeader(body)};
+        if (header != predecessors[1]) {
+            body = predecessors[1];
+            header = ConditionalHeader(body);
+            if (header != predecessors[0]) break;
+        }
+        const auto [other_condition, other_negated]{Condition(header->back().Arg(0))};
+        if (condition == other_condition && (phi->PhiBlock(0) == header || phi->PhiBlock(0) == body)) {
+            const IR::Block* const incoming{negated == other_negated ? body : header};
+            value = phi->Arg(phi->PhiBlock(0) == incoming ? 0 : 1);
+        }
+        block = header;
+    }
+    return value;
+}
+
 constexpr u32 DESCRIPTOR_SIZE = 8;
 constexpr u32 DESCRIPTOR_SIZE_SHIFT = u32(std::countr_zero(DESCRIPTOR_SIZE));
 constexpr u32 DESCRIPTOR_MAX_COUNT = 1024;
@@ -299,23 +353,23 @@ static inline bool IsTexturePixelFormatIntegerCached(Environment& env,
 }
 
 
-std::optional<ConstBufferAddr> Track(const IR::Value& value, Environment& env, const HostTranslateInfo& host_info);
-static inline std::optional<ConstBufferAddr> TrackCached(const IR::Value& v, Environment& env, const HostTranslateInfo& host_info) {
-    if (const IR::Inst* key = v.InstRecursive()) {
+std::optional<ConstBufferAddr> Track(const IR::Value& value, Environment& env, const HostTranslateInfo& host_info, const IR::Block* block);
+static inline std::optional<ConstBufferAddr> TrackCached(const IR::Value& v, Environment& env, const HostTranslateInfo& host_info, const IR::Block* block) {
+    if (const IR::Inst* key = v.TryInstRecursive()) {
         if (auto it = env.track_cache.find(key); it != env.track_cache.end()) return it->second;
-        auto found = Track(v, env, host_info);
+        auto found = Track(v, env, host_info, block);
         if (found) env.track_cache.emplace(key, *found);
         return found;
     }
-    return Track(v, env, host_info);
+    return Track(v, env, host_info, block);
 }
 
-std::optional<ConstBufferAddr> TryGetConstBuffer(const IR::Inst* inst, Environment& env, const HostTranslateInfo& host_info);
+std::optional<ConstBufferAddr> TryGetConstBuffer(const IR::Inst* inst, Environment& env, const HostTranslateInfo& host_info, const IR::Block* block);
 
-std::optional<ConstBufferAddr> Track(const IR::Value& value, Environment& env, const HostTranslateInfo& host_info) {
-    return IR::BreadthFirstSearch(value, [&env, &host_info](const IR::Inst* inst) {
-        return TryGetConstBuffer(inst, env, host_info);
-    });
+std::optional<ConstBufferAddr> Track(const IR::Value& value, Environment& env, const HostTranslateInfo& host_info, const IR::Block* block) {
+    return IR::BreadthFirstSearch(value, [&env, &host_info, block](const IR::Inst* inst) {
+        return TryGetConstBuffer(inst, env, host_info, block);
+    }, [&](IR::Value operand) { return ResolveConditionalPhi(operand, block); });
 }
 
 std::optional<u32> TryGetConstant(IR::Value& value, Environment& env) {
@@ -339,13 +393,13 @@ std::optional<u32> TryGetConstant(IR::Value& value, Environment& env) {
     return ReadCbufCached(env, index_number, offset_number);
 }
 
-std::optional<ConstBufferAddr> TryGetConstBuffer(const IR::Inst* inst, Environment& env, const HostTranslateInfo& host_info) {
+std::optional<ConstBufferAddr> TryGetConstBuffer(const IR::Inst* inst, Environment& env, const HostTranslateInfo& host_info, const IR::Block* block) {
     switch (inst->GetOpcode()) {
     default:
         return std::nullopt;
     case IR::Opcode::BitwiseOr32: {
-        std::optional lhs{TrackCached(inst->Arg(0), env, host_info)};
-        std::optional rhs{TrackCached(inst->Arg(1), env, host_info)};
+        std::optional lhs{TrackCached(inst->Arg(0), env, host_info, block)};
+        std::optional rhs{TrackCached(inst->Arg(1), env, host_info, block)};
         if (!lhs || !rhs) {
             return std::nullopt;
         }
@@ -375,7 +429,7 @@ std::optional<ConstBufferAddr> TryGetConstBuffer(const IR::Inst* inst, Environme
         if (!shift.IsImmediate()) {
             return std::nullopt;
         }
-        std::optional lhs{TrackCached(inst->Arg(0), env, host_info)};
+        std::optional lhs{TrackCached(inst->Arg(0), env, host_info, block)};
         if (lhs) {
             lhs->shift_left = shift.U32();
         }
@@ -403,7 +457,7 @@ std::optional<ConstBufferAddr> TryGetConstBuffer(const IR::Inst* inst, Environme
                 return std::nullopt;
             } while (false);
         }
-        std::optional lhs{TrackCached(op1, env, host_info)};
+        std::optional lhs{TrackCached(op1, env, host_info, block)};
         if (lhs) {
             lhs->shift_left = static_cast<u32>(std::countr_zero(op2.U32()));
         }
@@ -469,7 +523,7 @@ std::optional<ConstBufferAddr> TryGetConstBuffer(const IR::Inst* inst, Environme
 TextureInst MakeInst(Environment& env, IR::Block* block, IR::Inst& inst, const HostTranslateInfo& host_info) {
     ConstBufferAddr addr;
     if (IsBindless(inst)) {
-        const std::optional<ConstBufferAddr> track_addr{TrackCached(inst.Arg(0), env, host_info)};
+        const std::optional<ConstBufferAddr> track_addr{TrackCached(inst.Arg(0), env, host_info, block)};
 
         if (!track_addr) {
             throw NotImplementedException("Failed to track bindless texture constant buffer");
@@ -671,6 +725,7 @@ void TexturePass(Environment& env, IR::Program& program, const HostTranslateInfo
     env.track_cache.clear();
     TextureInstVector to_replace;
     for (IR::Block* const block : program.post_order_blocks) {
+        env.track_cache.clear();
         for (IR::Inst& inst : block->Instructions()) {
             if (!IsTextureInstruction(inst)) {
                 continue;

src/video_core/buffer_cache/buffer_cache.h

@@ -1738,36 +1738,64 @@ void BufferCache<P>::TouchBuffer(Buffer& buffer, BufferId buffer_id) noexcept {
 
 template <class P>
 bool BufferCache<P>::SynchronizeBuffer(Buffer& buffer, DAddr device_addr, u32 size) {
-    upload_copies.clear();
-    u64 total_size_bytes = 0;
-    u64 largest_copy = 0;
-    const DAddr buffer_start = buffer.cpu_addr_cached;
-    const auto add_upload = [&](DAddr start, DAddr end) {
-        if (start == end) return;
-        const u64 range_size = end - start;
-        upload_copies.push_back(BufferCopy{
-            .src_offset = total_size_bytes,
-            .dst_offset = start - buffer_start,
-            .size = range_size,
+#ifdef __ANDROID__
+    const bool use_optimized_vertex_buffers = Settings::values.use_optimized_vertex_buffers.GetValue();
+#else
+    constexpr bool use_optimized_vertex_buffers = true;
+#endif
+
+    if (use_optimized_vertex_buffers) {
+        upload_copies.clear();
+        u64 total_size_bytes = 0;
+        u64 largest_copy = 0;
+        const DAddr buffer_start = buffer.cpu_addr_cached;
+        const auto add_upload = [&](DAddr start, DAddr end) {
+            if (start == end) return;
+            const u64 range_size = end - start;
+            upload_copies.push_back(BufferCopy{
+                .src_offset = total_size_bytes,
+                .dst_offset = start - buffer_start,
+                .size = range_size,
+            });
+            total_size_bytes += range_size;
+            largest_copy = (std::max)(largest_copy, range_size);
+        };
+        memory_tracker.ForEachUploadRange(device_addr, size, [&](u64 device_addr_out, u64 range_size) {
+            DAddr upload_start = device_addr_out;
+            gpu_modified_ranges.ForEachInRange(device_addr_out, range_size, [&](DAddr gpu_start, DAddr gpu_end) {
+                add_upload(upload_start, gpu_start);
+                upload_start = gpu_end;
+            });
+            add_upload(upload_start, device_addr_out + range_size);
         });
-        total_size_bytes += range_size;
-        largest_copy = (std::max)(largest_copy, range_size);
-    };
-    memory_tracker.ForEachUploadRange(device_addr, size, [&](u64 device_addr_out, u64 range_size) {
-        DAddr upload_start = device_addr_out;
-        gpu_modified_ranges.ForEachInRange(device_addr_out, range_size, [&](DAddr gpu_start, DAddr gpu_end) {
-            add_upload(upload_start, gpu_start);
-            upload_start = gpu_end;
+        if (total_size_bytes == 0) {
+            return true;
+        }
+        const std::span<BufferCopy> copies_span(upload_copies.data(), upload_copies.size());
+        UploadMemory(buffer, total_size_bytes, largest_copy, copies_span);
+        any_buffer_uploaded = true;
+        return false;
+    } else {
+        boost::container::small_vector<BufferCopy, 4> copies;
+        u64 total_size_bytes = 0;
+        u64 largest_copy = 0;
+        DAddr buffer_start = buffer.CpuAddr();
+        memory_tracker.ForEachUploadRange(device_addr, size, [&](u64 device_addr_out, u64 range_size) {
+            copies.push_back(BufferCopy{
+                .src_offset = total_size_bytes,
+                .dst_offset = device_addr_out - buffer_start,
+                .size = range_size,
+            });
+            total_size_bytes += range_size;
+            largest_copy = (std::max)(largest_copy, range_size);
         });
-        add_upload(upload_start, device_addr_out + range_size);
-    });
-    if (total_size_bytes == 0) {
-        return true;
+        if (total_size_bytes == 0) {
+            return true;
+        }
+        const std::span<BufferCopy> copies_span(copies.data(), copies.size());
+        UploadMemory(buffer, total_size_bytes, largest_copy, copies_span);
+        return false;
     }
-    const std::span<BufferCopy> copies_span(upload_copies.data(), upload_copies.size());
-    UploadMemory(buffer, total_size_bytes, largest_copy, copies_span);
-    any_buffer_uploaded = true;
-    return false;
 }
 
 template <class P>

src/video_core/gpu.cpp

@@ -227,17 +227,17 @@ struct GPU::Impl {
 
     /// Notify rasterizer that any caches of the specified region should be invalidated
     void InvalidateRegion(DAddr addr, u64 size, bool preserve_gpu_writes) {
-        if (Settings::values.nce_invalidation_gpu_readback.GetValue()) {
+        if (preserve_gpu_writes) {
             VideoCore::RasterizerInterface* rasterizer = renderer->ReadRasterizer();
-            if (preserve_gpu_writes && rasterizer->MustFlushRegion(addr, size, VideoCommon::CacheType::BufferCache)) {
+            if (!rasterizer->TryCacheInvalidation(addr, size)) {
                 const u64 fence = RequestSyncOperation([rasterizer, addr, size] {
                     rasterizer->FlushRegion(addr, size, VideoCommon::CacheType::BufferCache);
                     rasterizer->OnCacheInvalidation(addr, size);
                 });
                 gpu_thread.TickGPU(is_async);
                 WaitForSyncOperation(fence);
-                return;
             }
+            return;
         }
         gpu_thread.InvalidateRegion(addr, size);
     }

src/video_core/rasterizer_interface.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -111,6 +114,12 @@ public:
     /// Notify rasterizer that any caches of the specified region are desync with guest
     virtual void OnCacheInvalidation(PAddr addr, u64 size) = 0;
 
+    virtual bool TryCacheInvalidation(DAddr addr, u64 size) {
+        if (MustFlushRegion(addr, size, VideoCommon::CacheType::BufferCache)) return false;
+        OnCacheInvalidation(addr, size);
+        return true;
+    }
+
     virtual bool OnCPUWrite(PAddr addr, u64 size) = 0;
 
     /// Sync memory between guest and host.

src/video_core/renderer_opengl/gl_shader_cache.cpp

@@ -414,6 +414,11 @@ GraphicsPipeline* ShaderCache::BuiltPipeline(GraphicsPipeline* pipeline) const n
     if (!use_asynchronous_shaders) {
         return pipeline;
     }
+    // If something is using depth, we can assume that games are not rendering anything which
+    // will be used one time.
+    if (maxwell3d->regs.zeta_enable) {
+        return nullptr;
+    }
     // If games are using a small index count, we can assume these are full screen quads.
     // Usually these shaders are only used once for building textures so we can assume they
     // can't be built async

src/video_core/renderer_vulkan/blit_image.cpp

@@ -563,8 +563,10 @@ void RecordShaderReadBarrier(Scheduler& scheduler, const ImageView& image_view)
     });
 }
 
-void BeginRenderPass(vk::CommandBuffer& cmdbuf, VkRenderPass render_pass,
-                     VkFramebuffer framebuffer_handle, VkExtent2D render_area) {
+void BeginRenderPass(vk::CommandBuffer& cmdbuf, const Framebuffer* framebuffer) {
+    const VkRenderPass render_pass = framebuffer->RenderPass();
+    const VkFramebuffer framebuffer_handle = framebuffer->Handle();
+    const VkExtent2D render_area = framebuffer->RenderArea();
     const VkRenderPassBeginInfo renderpass_bi{
         .sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO,
         .pNext = nullptr,
@@ -677,67 +679,27 @@ void BlitImageHelper::BlitColor(const Framebuffer* dst_framebuffer, const ImageV
 void BlitImageHelper::BlitColor(const Framebuffer* dst_framebuffer, VkImageView src_image_view,
                                 VkImage src_image, VkSampler src_sampler,
                                 const Region2D& dst_region, const Region2D& src_region,
-                                const Extent3D& src_size,
-                                const std::optional<VkRect2D>& scissor) {
+                                const Extent3D& src_size) {
     const BlitImagePipelineKey key{
         .renderpass = dst_framebuffer->RenderPass(),
         .operation = Tegra::Engines::Fermi2D::Operation::SrcCopy,
     };
     const VkPipelineLayout layout = *one_texture_pipeline_layout;
     const VkPipeline pipeline = FindOrEmplaceColorPipeline(key);
-
-    // Clip the destination rectangle to the scissor; the viewport keeps the full rectangle so
-    // the texture coordinates are unchanged.
-    std::optional<VkRect2D> clip;
-    if (scissor) {
-        const s64 x0 = (std::max)(s64{(std::min)(dst_region.start.x, dst_region.end.x)},
-                                  s64{scissor->offset.x});
-        const s64 y0 = (std::max)(s64{(std::min)(dst_region.start.y, dst_region.end.y)},
-                                  s64{scissor->offset.y});
-        const s64 x1 = (std::min)(s64{(std::max)(dst_region.start.x, dst_region.end.x)},
-                                  s64{scissor->offset.x} + scissor->extent.width);
-        const s64 y1 = (std::min)(s64{(std::max)(dst_region.start.y, dst_region.end.y)},
-                                  s64{scissor->offset.y} + scissor->extent.height);
-        if (x1 <= x0 || y1 <= y0) {
-            return; // Fully scissored out.
-        }
-        clip = VkRect2D{
-            .offset = {static_cast<s32>(x0), static_cast<s32>(y0)},
-            .extent = {static_cast<u32>(x1 - x0), static_cast<u32>(y1 - y0)},
-        };
-    }
-
-    // Read the framebuffer now: by the time the worker runs this, the texture cache may have
-    // retired it (moved into its delayed-destruction ring), leaving a null handle behind - Turnip
-    // then crashed in vkCmdBeginRenderPass (Crysis Remastered, DrawTexture).
-    const VkRenderPass render_pass = dst_framebuffer->RenderPass();
-    const VkFramebuffer framebuffer_handle = dst_framebuffer->Handle();
-    const VkExtent2D render_area = dst_framebuffer->RenderArea();
     scheduler.RequestOutsideRenderPassOperationContext();
-    scheduler.Record([this, render_pass, framebuffer_handle, render_area, src_image_view,
-                      src_image, src_sampler, dst_region, src_region, src_size, pipeline, layout,
-                      clip](vk::CommandBuffer cmdbuf) {
-        // Images stay in GENERAL everywhere (the descriptor below says so too): only make the
-        // earlier writes visible. Moving the source to SHADER_READ_ONLY_OPTIMAL left it there
-        // for good, so every later render pass used it in the wrong layout.
-        TransitionImageLayout(cmdbuf, src_image, VK_IMAGE_LAYOUT_GENERAL);
-        BeginRenderPass(cmdbuf, render_pass, framebuffer_handle, render_area);
+    scheduler.Record([this, dst_framebuffer, src_image_view, src_image, src_sampler, dst_region,
+                      src_region, src_size, pipeline, layout](vk::CommandBuffer cmdbuf) {
+        TransitionImageLayout(cmdbuf, src_image, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
+        BeginRenderPass(cmdbuf, dst_framebuffer);
         const VkDescriptorSet descriptor_set = one_texture_descriptor_allocator.Commit();
         UpdateOneTextureDescriptorSet(device, descriptor_set, src_sampler, src_image_view);
         cmdbuf.BindPipeline(VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
         cmdbuf.BindDescriptorSets(VK_PIPELINE_BIND_POINT_GRAPHICS, layout, 0, descriptor_set,
                                   nullptr);
         BindBlitState(cmdbuf, layout, dst_region, src_region, src_size);
-        if (clip) {
-            cmdbuf.SetScissor(0, *clip);
-        }
         cmdbuf.Draw(3, 1, 0, 0);
         cmdbuf.EndRenderPass();
     });
-    // The blit set its own pipeline, viewport and scissor: make the next draw set its own again,
-    // as every other helper here does. Without this the next draw kept the blit's viewport and
-    // scissor: Crysis Remastered drew its 256x256 minimap map over the whole screen.
-    scheduler.InvalidateState();
 }
 
 void BlitImageHelper::BlitImpl(const Framebuffer* dst_framebuffer,

src/video_core/renderer_vulkan/blit_image.h

@@ -7,7 +7,6 @@
 #pragma once
 
 #include <deque>
-#include <optional>
 #include <span>
 
 #include "video_core/engines/fermi_2d.h"
@@ -79,12 +78,9 @@ public:
                    Tegra::Engines::Fermi2D::Filter filter,
                    Tegra::Engines::Fermi2D::Operation operation);
 
-    /// @param scissor Optional clip rectangle in framebuffer pixels (DrawTexture honours the
-    ///                guest scissor like any other draw).
     void BlitColor(const Framebuffer* dst_framebuffer, VkImageView src_image_view,
                    VkImage src_image, VkSampler src_sampler, const Region2D& dst_region,
-                   const Region2D& src_region, const Extent3D& src_size,
-                   const std::optional<VkRect2D>& scissor = std::nullopt);
+                   const Region2D& src_region, const Extent3D& src_size);
 
     void BlitColorMSAA(const Framebuffer* dst_framebuffer, const ImageView& src_image_view,
                        const Region2D& dst_region, const Region2D& src_region);

src/video_core/renderer_vulkan/vk_pipeline_cache.cpp

@@ -447,7 +447,9 @@ PipelineCache::PipelineCache(Tegra::MaxwellDeviceMemoryManager& device_memory_,
                                        driver_id == VK_DRIVER_ID_AMD_OPEN_SOURCE ||
                                        driver_id == VK_DRIVER_ID_MESA_RADV ||
                                        driver_id == VK_DRIVER_ID_INTEL_PROPRIETARY_WINDOWS ||
-                                       driver_id == VK_DRIVER_ID_INTEL_OPEN_SOURCE_MESA,
+                                       driver_id == VK_DRIVER_ID_INTEL_OPEN_SOURCE_MESA ||
+                                       driver_id == VK_DRIVER_ID_QUALCOMM_PROPRIETARY ||
+                                       driver_id == VK_DRIVER_ID_MESA_TURNIP,
 
         .has_broken_spirv_clamp = driver_id == VK_DRIVER_ID_INTEL_PROPRIETARY_WINDOWS,
         .has_broken_spirv_position_input = driver_id == VK_DRIVER_ID_QUALCOMM_PROPRIETARY,
@@ -787,6 +789,11 @@ GraphicsPipeline* PipelineCache::BuiltPipeline(GraphicsPipeline* pipeline) const
     if (!use_asynchronous_shaders) {
         return pipeline;
     }
+    // If something is using depth, we can assume that games are not rendering anything which
+    // will be used one time.
+    if (maxwell3d->regs.zeta_enable) {
+        return nullptr;
+    }
     // If games are using a small index count, we can assume these are full screen quads.
     // Usually these shaders are only used once for building textures so we can assume they
     // can't be built async

src/video_core/renderer_vulkan/vk_rasterizer.cpp

@@ -393,35 +393,8 @@ void RasterizerVulkan::DrawTexture() {
                                     .y = ScaleSrc(draw_texture_state.src_y1)}};
     Extent3D src_size = {static_cast<u32>(ScaleSrc(texture.size.width)),
                          static_cast<u32>(ScaleSrc(texture.size.height)), texture.size.depth};
-    // DrawTexture rectangles go through the fragment pipeline, scissor included.
-    std::optional<VkRect2D> scissor;
-    if (maxwell3d->regs.scissor_test[0].enable) {
-        u32 up_scale = 1;
-        u32 down_shift = 0;
-        if (dst_rescaling) {
-            up_scale = Settings::values.resolution_info.up_scale;
-            down_shift = Settings::values.resolution_info.down_shift;
-        }
-        scissor = GetScissorState(maxwell3d->regs, 0, up_scale, down_shift);
-    }
-
-    // Drawing a texture 1:1 onto itself without blending changes nothing on hardware, but here
-    // it samples the image the render pass is writing to: undefined in Vulkan, and on tiled GPUs
-    // it reads whatever the image memory last held. Crysis Remastered does this every frame for
-    // its post-processing buffers (suspected cause of its map covering the whole screen).
-    const auto& fb_images = framebuffer->Images();
-    const bool src_is_target =
-        std::find(fb_images.begin(), fb_images.begin() + framebuffer->NumImages(),
-                  texture.ImageHandle()) != fb_images.begin() + framebuffer->NumImages();
-    if (src_is_target && src_rescaling == dst_rescaling &&
-        src_region.start.x == dst_region.start.x && src_region.start.y == dst_region.start.y &&
-        src_region.end.x == dst_region.end.x && src_region.end.y == dst_region.end.y &&
-        maxwell3d->regs.blend.enable[0] == 0) {
-        return;
-    }
-
     blit_image.BlitColor(framebuffer, texture.RenderTarget(), texture.ImageHandle(),
-                         sampler->Handle(), dst_region, src_region, src_size, scissor);
+                         sampler->Handle(), dst_region, src_region, src_size);
 }
 
 void RasterizerVulkan::Clear(u32 layer_count) {
@@ -825,6 +798,18 @@ void RasterizerVulkan::OnCacheInvalidation(DAddr addr, u64 size) {
     pipeline_cache.InvalidateRegion(addr, size);
 }
 
+bool RasterizerVulkan::TryCacheInvalidation(DAddr addr, u64 size) {
+    if (addr == 0 || size == 0) return true;
+    {
+        std::scoped_lock lock{buffer_cache.mutex, texture_cache.mutex};
+        if (buffer_cache.IsRegionGpuModified(addr, size)) return false;
+        texture_cache.WriteMemory(addr, size);
+        buffer_cache.WriteMemory(addr, size);
+    }
+    pipeline_cache.InvalidateRegion(addr, size);
+    return true;
+}
+
 void RasterizerVulkan::InvalidateGPUCache() {
     gpu.InvalidateGPUCache();
 }

src/video_core/renderer_vulkan/vk_rasterizer.h

@@ -106,6 +106,7 @@ public:
                           VideoCommon::CacheType which = VideoCommon::CacheType::All) override;
     void InnerInvalidation(std::span<const std::pair<DAddr, std::size_t>> sequences) override;
     void OnCacheInvalidation(DAddr addr, u64 size) override;
+    bool TryCacheInvalidation(DAddr addr, u64 size) override;
     bool OnCPUWrite(DAddr addr, u64 size) override;
     void InvalidateGPUCache() override;
     void UnmapMemory(DAddr addr, u64 size) override;

src/yuzu/main_window.cpp

@@ -2797,9 +2797,9 @@ void MainWindow::IncrementInstallProgress() {
 
 void MainWindow::OnMenuInstallToNAND() {
     const QString file_filter =
-        tr("Installable Switch File (*.nca *.nsp *.xci);;Nintendo Content Archive "
-           "(*.nca);;Nintendo Submission Package (*.nsp);;NX Cartridge "
-           "Image (*.xci)");
+        tr("Installable Switch File (*.nca *.nsp *.nsz *.xci *.xcz);;Nintendo Content Archive "
+           "(*.nca);;Nintendo Submission Package (*.nsp *.nsz);;NX Cartridge "
+           "Image (*.xci *.xcz)");
 
     QStringList filenames = QFileDialog::getOpenFileNames(
         this, tr("Install Files"), QString::fromStdString(UISettings::values.roms_path),
@@ -2856,7 +2856,10 @@ void MainWindow::OnMenuInstallToNAND() {
         QFuture<ContentManager::InstallResult> future;
         ContentManager::InstallResult result;
 
-        if (file.endsWith(QStringLiteral("nsp"), Qt::CaseInsensitive)) {
+        if (file.endsWith(QStringLiteral("nsp"), Qt::CaseInsensitive) ||
+            file.endsWith(QStringLiteral("nsz"), Qt::CaseInsensitive) ||
+            file.endsWith(QStringLiteral("xci"), Qt::CaseInsensitive) ||
+            file.endsWith(QStringLiteral("xcz"), Qt::CaseInsensitive)) {
             const auto progress_callback = [this](size_t size, size_t progress) {
                 emit UpdateInstallProgress();
                 if (install_progress->wasCanceled()) {
@@ -3661,12 +3664,12 @@ void MainWindow::OnToggleGraphicsAPI() {
         api = Settings::RendererBackend::OpenGL_GLSL;
         break;
     case Settings::RendererBackend::OpenGL_GLSL:
-        api = Settings::RendererBackend::OpenGL_GLSL;
-        break;
-    case Settings::RendererBackend::OpenGL_SPIRV:
         api = Settings::RendererBackend::OpenGL_GLASM;
         break;
     case Settings::RendererBackend::OpenGL_GLASM:
+        api = Settings::RendererBackend::OpenGL_SPIRV;
+        break;
+    case Settings::RendererBackend::OpenGL_SPIRV:
         api = Settings::RendererBackend::Null;
         break;
 #else