core: hle: kernel: k_slab_heap: Refresh to use guest allocations.
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bunnei
parent
a25cd4bb4b
commit
15d9b0418f
2 changed files with 114 additions and 132 deletions
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@ -16,39 +16,34 @@ class KernelCore;
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namespace impl {
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class KSlabHeapImpl final {
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public:
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class KSlabHeapImpl {
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YUZU_NON_COPYABLE(KSlabHeapImpl);
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YUZU_NON_MOVEABLE(KSlabHeapImpl);
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public:
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struct Node {
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Node* next{};
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};
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public:
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constexpr KSlabHeapImpl() = default;
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constexpr ~KSlabHeapImpl() = default;
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void Initialize(std::size_t size) {
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ASSERT(head == nullptr);
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obj_size = size;
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}
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constexpr std::size_t GetObjectSize() const {
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return obj_size;
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void Initialize() {
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ASSERT(m_head == nullptr);
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}
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Node* GetHead() const {
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return head;
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return m_head;
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}
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void* Allocate() {
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Node* ret = head.load();
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Node* ret = m_head.load();
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do {
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if (ret == nullptr) {
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break;
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}
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} while (!head.compare_exchange_weak(ret, ret->next));
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} while (!m_head.compare_exchange_weak(ret, ret->next));
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return ret;
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}
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@ -56,170 +51,157 @@ public:
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void Free(void* obj) {
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Node* node = static_cast<Node*>(obj);
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Node* cur_head = head.load();
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Node* cur_head = m_head.load();
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do {
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node->next = cur_head;
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} while (!head.compare_exchange_weak(cur_head, node));
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} while (!m_head.compare_exchange_weak(cur_head, node));
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}
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private:
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std::atomic<Node*> head{};
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std::size_t obj_size{};
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std::atomic<Node*> m_head{};
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};
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} // namespace impl
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class KSlabHeapBase {
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public:
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template <bool SupportDynamicExpansion>
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class KSlabHeapBase : protected impl::KSlabHeapImpl {
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YUZU_NON_COPYABLE(KSlabHeapBase);
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YUZU_NON_MOVEABLE(KSlabHeapBase);
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private:
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size_t m_obj_size{};
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uintptr_t m_peak{};
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uintptr_t m_start{};
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uintptr_t m_end{};
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private:
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void UpdatePeakImpl(uintptr_t obj) {
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static_assert(std::atomic_ref<uintptr_t>::is_always_lock_free);
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std::atomic_ref<uintptr_t> peak_ref(m_peak);
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const uintptr_t alloc_peak = obj + this->GetObjectSize();
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uintptr_t cur_peak = m_peak;
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do {
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if (alloc_peak <= cur_peak) {
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break;
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}
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} while (!peak_ref.compare_exchange_strong(cur_peak, alloc_peak));
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}
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public:
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constexpr KSlabHeapBase() = default;
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constexpr ~KSlabHeapBase() = default;
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constexpr bool Contains(uintptr_t addr) const {
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return start <= addr && addr < end;
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bool Contains(uintptr_t address) const {
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return m_start <= address && address < m_end;
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}
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constexpr std::size_t GetSlabHeapSize() const {
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return (end - start) / GetObjectSize();
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}
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constexpr std::size_t GetObjectSize() const {
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return impl.GetObjectSize();
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}
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constexpr uintptr_t GetSlabHeapAddress() const {
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return start;
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}
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std::size_t GetObjectIndexImpl(const void* obj) const {
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return (reinterpret_cast<uintptr_t>(obj) - start) / GetObjectSize();
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}
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std::size_t GetPeakIndex() const {
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return GetObjectIndexImpl(reinterpret_cast<const void*>(peak));
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}
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void* AllocateImpl() {
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return impl.Allocate();
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}
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void FreeImpl(void* obj) {
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// Don't allow freeing an object that wasn't allocated from this heap
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ASSERT(Contains(reinterpret_cast<uintptr_t>(obj)));
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impl.Free(obj);
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}
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void InitializeImpl(std::size_t obj_size, void* memory, std::size_t memory_size) {
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// Ensure we don't initialize a slab using null memory
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void Initialize(size_t obj_size, void* memory, size_t memory_size) {
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// Ensure we don't initialize a slab using null memory.
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ASSERT(memory != nullptr);
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// Initialize the base allocator
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impl.Initialize(obj_size);
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// Set our object size.
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m_obj_size = obj_size;
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// Set our tracking variables
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const std::size_t num_obj = (memory_size / obj_size);
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start = reinterpret_cast<uintptr_t>(memory);
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end = start + num_obj * obj_size;
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peak = start;
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// Initialize the base allocator.
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KSlabHeapImpl::Initialize();
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// Free the objects
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u8* cur = reinterpret_cast<u8*>(end);
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// Set our tracking variables.
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const size_t num_obj = (memory_size / obj_size);
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m_start = reinterpret_cast<uintptr_t>(memory);
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m_end = m_start + num_obj * obj_size;
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m_peak = m_start;
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for (std::size_t i{}; i < num_obj; i++) {
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// Free the objects.
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u8* cur = reinterpret_cast<u8*>(m_end);
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for (size_t i = 0; i < num_obj; i++) {
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cur -= obj_size;
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impl.Free(cur);
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KSlabHeapImpl::Free(cur);
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}
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}
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private:
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using Impl = impl::KSlabHeapImpl;
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size_t GetSlabHeapSize() const {
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return (m_end - m_start) / this->GetObjectSize();
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}
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Impl impl;
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uintptr_t peak{};
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uintptr_t start{};
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uintptr_t end{};
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size_t GetObjectSize() const {
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return m_obj_size;
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}
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void* Allocate() {
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void* obj = KSlabHeapImpl::Allocate();
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return obj;
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}
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void Free(void* obj) {
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// Don't allow freeing an object that wasn't allocated from this heap.
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const bool contained = this->Contains(reinterpret_cast<uintptr_t>(obj));
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ASSERT(contained);
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KSlabHeapImpl::Free(obj);
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}
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size_t GetObjectIndex(const void* obj) const {
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if constexpr (SupportDynamicExpansion) {
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if (!this->Contains(reinterpret_cast<uintptr_t>(obj))) {
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return std::numeric_limits<size_t>::max();
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}
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}
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return (reinterpret_cast<uintptr_t>(obj) - m_start) / this->GetObjectSize();
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}
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size_t GetPeakIndex() const {
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return this->GetObjectIndex(reinterpret_cast<const void*>(m_peak));
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}
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uintptr_t GetSlabHeapAddress() const {
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return m_start;
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}
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size_t GetNumRemaining() const {
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// Only calculate the number of remaining objects under debug configuration.
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return 0;
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}
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};
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template <typename T>
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class KSlabHeap final : public KSlabHeapBase {
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class KSlabHeap final : public KSlabHeapBase<false> {
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private:
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using BaseHeap = KSlabHeapBase<false>;
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public:
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enum class AllocationType {
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Host,
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Guest,
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};
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constexpr KSlabHeap() = default;
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explicit constexpr KSlabHeap(AllocationType allocation_type_ = AllocationType::Host)
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: KSlabHeapBase(), allocation_type{allocation_type_} {}
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void Initialize(void* memory, std::size_t memory_size) {
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if (allocation_type == AllocationType::Guest) {
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InitializeImpl(sizeof(T), memory, memory_size);
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}
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void Initialize(void* memory, size_t memory_size) {
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BaseHeap::Initialize(sizeof(T), memory, memory_size);
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}
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T* Allocate() {
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switch (allocation_type) {
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case AllocationType::Host:
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// Fallback for cases where we do not yet support allocating guest memory from the slab
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// heap, such as for kernel memory regions.
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return new T;
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T* obj = static_cast<T*>(BaseHeap::Allocate());
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case AllocationType::Guest:
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T* obj = static_cast<T*>(AllocateImpl());
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if (obj != nullptr) {
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new (obj) T();
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}
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return obj;
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if (obj != nullptr) [[likely]] {
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std::construct_at(obj);
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}
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UNREACHABLE_MSG("Invalid AllocationType {}", allocation_type);
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return nullptr;
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return obj;
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}
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T* AllocateWithKernel(KernelCore& kernel) {
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switch (allocation_type) {
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case AllocationType::Host:
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// Fallback for cases where we do not yet support allocating guest memory from the slab
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// heap, such as for kernel memory regions.
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return new T(kernel);
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T* Allocate(KernelCore& kernel) {
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T* obj = static_cast<T*>(BaseHeap::Allocate());
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case AllocationType::Guest:
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T* obj = static_cast<T*>(AllocateImpl());
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if (obj != nullptr) {
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new (obj) T(kernel);
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}
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return obj;
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if (obj != nullptr) [[likely]] {
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std::construct_at(obj, kernel);
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}
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UNREACHABLE_MSG("Invalid AllocationType {}", allocation_type);
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return nullptr;
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return obj;
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}
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void Free(T* obj) {
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switch (allocation_type) {
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case AllocationType::Host:
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// Fallback for cases where we do not yet support allocating guest memory from the slab
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// heap, such as for kernel memory regions.
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delete obj;
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return;
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case AllocationType::Guest:
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FreeImpl(obj);
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return;
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}
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UNREACHABLE_MSG("Invalid AllocationType {}", allocation_type);
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BaseHeap::Free(obj);
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}
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constexpr std::size_t GetObjectIndex(const T* obj) const {
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return GetObjectIndexImpl(obj);
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size_t GetObjectIndex(const T* obj) const {
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return BaseHeap::GetObjectIndex(obj);
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}
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private:
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const AllocationType allocation_type;
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};
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} // namespace Kernel
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@ -59,7 +59,7 @@ class KAutoObjectWithSlabHeapAndContainer : public Base {
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private:
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static Derived* Allocate(KernelCore& kernel) {
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return kernel.SlabHeap<Derived>().AllocateWithKernel(kernel);
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return kernel.SlabHeap<Derived>().Allocate(kernel);
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}
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static void Free(KernelCore& kernel, Derived* obj) {
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