address review commentary

src/core/hle/kernel/process.cpp

@@ -129,20 +129,16 @@ u64 Process::GetTotalPhysicalMemoryAvailable() const {
     return vm_manager.GetTotalPhysicalMemoryAvailable();
 }
 
-u64 Process::GetTotalPhysicalMemoryAvailableWithoutMmHeap() const {
-    // TODO: Subtract the personal heap size from this when the
-    //       personal heap is implemented.
-    return GetTotalPhysicalMemoryAvailable();
+u64 Process::GetTotalPhysicalMemoryAvailableWithoutSystemResource() const {
+    return GetTotalPhysicalMemoryAvailable() - GetSystemResourceSize();
 }
 
 u64 Process::GetTotalPhysicalMemoryUsed() const {
-    return vm_manager.GetCurrentHeapSize() + main_thread_stack_size + code_memory_size;
+    return vm_manager.GetCurrentHeapSize() + main_thread_stack_size + code_memory_size + GetSystemResourceUsage();
 }
 
-u64 Process::GetTotalPhysicalMemoryUsedWithoutMmHeap() const {
-    // TODO: Subtract the personal heap size from this when the
-    //       personal heap is implemented.
-    return GetTotalPhysicalMemoryUsed();
+u64 Process::GetTotalPhysicalMemoryUsedWithoutSystemResource() const {
+    return GetTotalPhysicalMemoryUsed() - GetSystemResourceUsage();
 }
 
 void Process::RegisterThread(const Thread* thread) {

src/core/hle/kernel/process.h

@@ -173,6 +173,21 @@ public:
         return system_resource_size;
     }
 
+    /// Gets the amount of secure memory currently in use for memory management.
+    u32 GetSystemResourceUsage() const {
+        // On hardware, this returns the amount of system resource memory that has
+        // been used by the kernel. This is problematic for Yuzu to emulate, because
+        // system resource memory is used for page tables -- and yuzu doesn't really
+        // have a way to calculate how much memory is required for page tables for
+        // the current process at any given time.
+        // TODO: Is this even worth implementing? Games may retrieve this value via
+        // an SDK function that gets used + available system resource size for debug
+        // or diagnostic purposes. However, it seems unlikely that a game would make
+        // decisions based on how much system memory is dedicated to its page tables.
+        // Is returning a value other than zero wise?
+        return 0;
+    }
+
     /// Whether this process is an AArch64 or AArch32 process.
     bool Is64BitProcess() const {
         return is_64bit_process;
@@ -197,15 +212,15 @@ public:
     u64 GetTotalPhysicalMemoryAvailable() const;
 
     /// Retrieves the total physical memory available to this process in bytes,
-    /// without the size of the personal heap added to it.
-    u64 GetTotalPhysicalMemoryAvailableWithoutMmHeap() const;
+    /// without the size of the personal system resource heap added to it.
+    u64 GetTotalPhysicalMemoryAvailableWithoutSystemResource() const;
 
     /// Retrieves the total physical memory used by this process in bytes.
     u64 GetTotalPhysicalMemoryUsed() const;
 
     /// Retrieves the total physical memory used by this process in bytes,
-    /// without the size of the personal heap added to it.
-    u64 GetTotalPhysicalMemoryUsedWithoutMmHeap() const;
+    /// without the size of the personal system resource heap added to it.
+    u64 GetTotalPhysicalMemoryUsedWithoutSystemResource() const;
 
     /// Gets the list of all threads created with this process as their owner.
     const std::list<const Thread*>& GetThreadList() const {

src/core/hle/kernel/svc.cpp

@@ -737,8 +737,8 @@ static ResultCode GetInfo(Core::System& system, u64* result, u64 info_id, u64 ha
         // 5.0.0+
         UserExceptionContextAddr = 20,
         // 6.0.0+
-        TotalPhysicalMemoryAvailableWithoutMmHeap = 21,
-        TotalPhysicalMemoryUsedWithoutMmHeap = 22,
+        TotalPhysicalMemoryAvailableWithoutSystemResource = 21,
+        TotalPhysicalMemoryUsedWithoutSystemResource = 22,
     };
 
     const auto info_id_type = static_cast<GetInfoType>(info_id);
@@ -760,8 +760,8 @@ static ResultCode GetInfo(Core::System& system, u64* result, u64 info_id, u64 ha
     case GetInfoType::SystemResourceUsage:
     case GetInfoType::TitleId:
     case GetInfoType::UserExceptionContextAddr:
-    case GetInfoType::TotalPhysicalMemoryAvailableWithoutMmHeap:
-    case GetInfoType::TotalPhysicalMemoryUsedWithoutMmHeap: {
+    case GetInfoType::TotalPhysicalMemoryAvailableWithoutSystemResource:
+    case GetInfoType::TotalPhysicalMemoryUsedWithoutSystemResource: {
         if (info_sub_id != 0) {
             return ERR_INVALID_ENUM_VALUE;
         }
@@ -827,17 +827,9 @@ static ResultCode GetInfo(Core::System& system, u64* result, u64 info_id, u64 ha
             return RESULT_SUCCESS;
 
         case GetInfoType::SystemResourceUsage:
-            // On hardware, this returns the amount of system resource memory that has
-            // been used by the kernel. This is problematic for Yuzu to emulate, because
-            // system resource memory is used for page tables -- and yuzu doesn't really
-            // have a way to calculate how much memory is required for page tables for
-            // the current process at any given time.
-            // TODO: Is this even worth implementing? No game should ever use it, since
-            // the amount of remaining page table space should never be relevant except
-            // for diagnostics. Is returning a value other than zero wise?
             LOG_WARNING(Kernel_SVC,
-                        "(STUBBED) Attempted to query system resource usage, returned 0");
-            *result = 0;
+                        "(STUBBED) Attempted to query system resource usage");
+            *result = process->GetSystemResourceUsage();
             return RESULT_SUCCESS;
 
         case GetInfoType::TitleId:
@@ -850,12 +842,12 @@ static ResultCode GetInfo(Core::System& system, u64* result, u64 info_id, u64 ha
             *result = 0;
             return RESULT_SUCCESS;
 
-        case GetInfoType::TotalPhysicalMemoryAvailableWithoutMmHeap:
-            *result = process->GetTotalPhysicalMemoryAvailable();
+        case GetInfoType::TotalPhysicalMemoryAvailableWithoutSystemResource:
+            *result = process->GetTotalPhysicalMemoryAvailableWithoutSystemResource();
             return RESULT_SUCCESS;
 
-        case GetInfoType::TotalPhysicalMemoryUsedWithoutMmHeap:
-            *result = process->GetTotalPhysicalMemoryUsedWithoutMmHeap();
+        case GetInfoType::TotalPhysicalMemoryUsedWithoutSystemResource:
+            *result = process->GetTotalPhysicalMemoryUsedWithoutSystemResource();
             return RESULT_SUCCESS;
 
         default:
@@ -984,7 +976,7 @@ static ResultCode MapPhysicalMemory(Core::System& system, VAddr addr, u64 size)
         return ERR_INVALID_MEMORY_RANGE;
     }
 
-    auto* const current_process = Core::CurrentProcess();
+    Process* const current_process = system.Kernel().CurrentProcess();
     auto& vm_manager = current_process->VMManager();
 
     if (current_process->GetSystemResourceSize() == 0) {
@@ -1024,7 +1016,7 @@ static ResultCode UnmapPhysicalMemory(Core::System& system, VAddr addr, u64 size
         return ERR_INVALID_MEMORY_RANGE;
     }
 
-    auto* const current_process = Core::CurrentProcess();
+    Process* const current_process = system.Kernel().CurrentProcess();
     auto& vm_manager = current_process->VMManager();
 
     if (current_process->GetSystemResourceSize() == 0) {

src/core/hle/kernel/vm_manager.cpp

@@ -349,7 +349,7 @@ ResultCode VMManager::MapPhysicalMemory(VAddr target, u64 size) {
     }
 
     // Check that we can map the memory we want.
-    const auto res_limit = Core::CurrentProcess()->GetResourceLimit();
+    const auto res_limit = system.CurrentProcess()->GetResourceLimit();
     const u64 physmem_remaining = res_limit->GetMaxResourceValue(ResourceType::PhysicalMemory) -
                                   res_limit->GetCurrentResourceValue(ResourceType::PhysicalMemory);
     if (physmem_remaining < (size - mapped_size)) {
@@ -558,6 +558,9 @@ ResultCode VMManager::UnmapPhysicalMemory(VAddr target, u64 size) {
         }
     }
 
+    // Update mapped amount
+    physical_memory_mapped -= mapped_size;
+
     return RESULT_SUCCESS;
 }
 

src/core/hle/kernel/vm_manager.h

@@ -458,7 +458,7 @@ public:
     ///
     /// @note The destination address must lie within the Map region.
     ///
-    /// @note This function requires SystemResourceSize is non-zero,
+    /// @note This function requires that SystemResourceSize be non-zero,
     ///       however, this is just because if it were not then the
     ///       resulting page tables could be exploited on hardware by
     ///       a malicious program. SystemResource usage does not need
@@ -472,7 +472,7 @@ public:
     ///
     /// @note The destination address must lie within the Map region.
     ///
-    /// @note This function requires SystemResourceSize is non-zero,
+    /// @note This function requires that SystemResourceSize be non-zero,
     ///       however, this is just because if it were not then the
     ///       resulting page tables could be exploited on hardware by
     ///       a malicious program. SystemResource usage does not need