diff options
| -rw-r--r-- | src/common/host_memory.cpp | 38 | ||||
| -rw-r--r-- | src/common/host_memory.h | 2 | ||||
| -rw-r--r-- | src/core/hle/kernel/k_memory_manager.cpp | 5 | ||||
| -rw-r--r-- | src/core/hle/kernel/k_page_table_base.cpp | 14 |
4 files changed, 42 insertions, 17 deletions
diff --git a/src/common/host_memory.cpp b/src/common/host_memory.cpp index 4bfc64f2d..e540375b8 100644 --- a/src/common/host_memory.cpp +++ b/src/common/host_memory.cpp @@ -11,10 +11,6 @@ #elif defined(__linux__) || defined(__FreeBSD__) // ^^^ Windows ^^^ vvv Linux vvv -#ifdef ANDROID -#include <android/sharedmem.h> -#endif - #ifndef _GNU_SOURCE #define _GNU_SOURCE #endif @@ -193,6 +189,11 @@ public: } } + bool ClearBackingRegion(size_t physical_offset, size_t length) { + // TODO: This does not seem to be possible on Windows. + return false; + } + void EnableDirectMappedAddress() { // TODO UNREACHABLE(); @@ -442,9 +443,7 @@ public: } // Backing memory initialization -#ifdef ANDROID - fd = ASharedMemory_create("HostMemory", backing_size); -#elif defined(__FreeBSD__) && __FreeBSD__ < 13 +#if defined(__FreeBSD__) && __FreeBSD__ < 13 // XXX Drop after FreeBSD 12.* reaches EOL on 2024-06-30 fd = shm_open(SHM_ANON, O_RDWR, 0600); #else @@ -455,7 +454,6 @@ public: throw std::bad_alloc{}; } -#ifndef ANDROID // Defined to extend the file with zeros int ret = ftruncate(fd, backing_size); if (ret != 0) { @@ -463,7 +461,6 @@ public: strerror(errno)); throw std::bad_alloc{}; } -#endif backing_base = static_cast<u8*>( mmap(nullptr, backing_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)); @@ -552,6 +549,19 @@ public: ASSERT_MSG(ret == 0, "mprotect failed: {}", strerror(errno)); } + bool ClearBackingRegion(size_t physical_offset, size_t length) { +#ifdef __linux__ + // Set MADV_REMOVE on backing map to destroy it instantly. + // This also deletes the area from the backing file. + int ret = madvise(backing_base + physical_offset, length, MADV_REMOVE); + ASSERT_MSG(ret == 0, "madvise failed: {}", strerror(errno)); + + return true; +#else + return false; +#endif + } + void EnableDirectMappedAddress() { virtual_base = nullptr; } @@ -623,6 +633,10 @@ public: void Protect(size_t virtual_offset, size_t length, bool read, bool write, bool execute) {} + bool ClearBackingRegion(size_t physical_offset, size_t length) { + return false; + } + void EnableDirectMappedAddress() {} u8* backing_base{nullptr}; @@ -698,6 +712,12 @@ void HostMemory::Protect(size_t virtual_offset, size_t length, bool read, bool w impl->Protect(virtual_offset + virtual_base_offset, length, read, write, execute); } +void HostMemory::ClearBackingRegion(size_t physical_offset, size_t length, u32 fill_value) { + if (!impl || fill_value != 0 || !impl->ClearBackingRegion(physical_offset, length)) { + std::memset(backing_base + physical_offset, fill_value, length); + } +} + void HostMemory::EnableDirectMappedAddress() { if (impl) { impl->EnableDirectMappedAddress(); diff --git a/src/common/host_memory.h b/src/common/host_memory.h index cebfacab2..747c5850c 100644 --- a/src/common/host_memory.h +++ b/src/common/host_memory.h @@ -48,6 +48,8 @@ public: void EnableDirectMappedAddress(); + void ClearBackingRegion(size_t physical_offset, size_t length, u32 fill_value); + [[nodiscard]] u8* BackingBasePointer() noexcept { return backing_base; } diff --git a/src/core/hle/kernel/k_memory_manager.cpp b/src/core/hle/kernel/k_memory_manager.cpp index 0a973ec8c..d6bd27296 100644 --- a/src/core/hle/kernel/k_memory_manager.cpp +++ b/src/core/hle/kernel/k_memory_manager.cpp @@ -421,8 +421,9 @@ Result KMemoryManager::AllocateForProcess(KPageGroup* out, size_t num_pages, u32 } else { // Set all the allocated memory. for (const auto& block : *out) { - std::memset(m_system.DeviceMemory().GetPointer<void>(block.GetAddress()), fill_pattern, - block.GetSize()); + m_system.DeviceMemory().buffer.ClearBackingRegion(GetInteger(block.GetAddress()) - + Core::DramMemoryMap::Base, + block.GetSize(), fill_pattern); } } diff --git a/src/core/hle/kernel/k_page_table_base.cpp b/src/core/hle/kernel/k_page_table_base.cpp index 4c416d809..423289145 100644 --- a/src/core/hle/kernel/k_page_table_base.cpp +++ b/src/core/hle/kernel/k_page_table_base.cpp @@ -81,6 +81,11 @@ void InvalidateInstructionCache(KernelCore& kernel, AddressType addr, u64 size) } } +void ClearBackingRegion(Core::System& system, KPhysicalAddress addr, u64 size, u32 fill_value) { + system.DeviceMemory().buffer.ClearBackingRegion(GetInteger(addr) - Core::DramMemoryMap::Base, + size, fill_value); +} + template <typename AddressType> Result InvalidateDataCache(AddressType addr, u64 size) { R_SUCCEED(); @@ -1363,8 +1368,7 @@ Result KPageTableBase::MapInsecureMemory(KProcessAddress address, size_t size) { // Clear all the newly allocated pages. for (const auto& it : pg) { - std::memset(GetHeapVirtualPointer(m_kernel, it.GetAddress()), - static_cast<u32>(m_heap_fill_value), it.GetSize()); + ClearBackingRegion(m_system, it.GetAddress(), it.GetSize(), m_heap_fill_value); } // Lock the table. @@ -1570,8 +1574,7 @@ Result KPageTableBase::AllocateAndMapPagesImpl(PageLinkedList* page_list, KProce // Clear all pages. for (const auto& it : pg) { - std::memset(GetHeapVirtualPointer(m_kernel, it.GetAddress()), - static_cast<u32>(m_heap_fill_value), it.GetSize()); + ClearBackingRegion(m_system, it.GetAddress(), it.GetSize(), m_heap_fill_value); } // Map the pages. @@ -2159,8 +2162,7 @@ Result KPageTableBase::SetHeapSize(KProcessAddress* out, size_t size) { // Clear all the newly allocated pages. for (const auto& it : pg) { - std::memset(GetHeapVirtualPointer(m_kernel, it.GetAddress()), m_heap_fill_value, - it.GetSize()); + ClearBackingRegion(m_system, it.GetAddress(), it.GetSize(), m_heap_fill_value); } // Map the pages. |