diff options
Diffstat (limited to 'src/core')
| -rw-r--r-- | src/core/hle/kernel/k_page_table.cpp | 812 | ||||
| -rw-r--r-- | src/core/hle/kernel/k_page_table.h | 100 | ||||
| -rw-r--r-- | src/core/hle/kernel/svc_results.h | 1 |
3 files changed, 910 insertions, 3 deletions
diff --git a/src/core/hle/kernel/k_page_table.cpp b/src/core/hle/kernel/k_page_table.cpp index 0f1bab067..2635d8148 100644 --- a/src/core/hle/kernel/k_page_table.cpp +++ b/src/core/hle/kernel/k_page_table.cpp @@ -24,6 +24,65 @@ namespace Kernel { namespace { +class KScopedLightLockPair { + YUZU_NON_COPYABLE(KScopedLightLockPair); + YUZU_NON_MOVEABLE(KScopedLightLockPair); + +private: + KLightLock* m_lower; + KLightLock* m_upper; + +public: + KScopedLightLockPair(KLightLock& lhs, KLightLock& rhs) { + // Ensure our locks are in a consistent order. + if (std::addressof(lhs) <= std::addressof(rhs)) { + m_lower = std::addressof(lhs); + m_upper = std::addressof(rhs); + } else { + m_lower = std::addressof(rhs); + m_upper = std::addressof(lhs); + } + + // Acquire both locks. + m_lower->Lock(); + if (m_lower != m_upper) { + m_upper->Lock(); + } + } + + ~KScopedLightLockPair() { + // Unlock the upper lock. + if (m_upper != nullptr && m_upper != m_lower) { + m_upper->Unlock(); + } + + // Unlock the lower lock. + if (m_lower != nullptr) { + m_lower->Unlock(); + } + } + +public: + // Utility. + void TryUnlockHalf(KLightLock& lock) { + // Only allow unlocking if the lock is half the pair. + if (m_lower != m_upper) { + // We want to be sure the lock is one we own. + if (m_lower == std::addressof(lock)) { + lock.Unlock(); + m_lower = nullptr; + } else if (m_upper == std::addressof(lock)) { + lock.Unlock(); + m_upper = nullptr; + } + } + } +}; + +} // namespace + +namespace { + using namespace Common::Literals; constexpr size_t GetAddressSpaceWidthFromType(FileSys::ProgramAddressSpaceType as_type) { @@ -676,7 +735,8 @@ bool KPageTable::IsValidPageGroup(const KPageGroup& pg_ll, VAddr addr, size_t nu Result KPageTable::UnmapProcessMemory(VAddr dst_addr, size_t size, KPageTable& src_page_table, VAddr src_addr) { - KScopedLightLock lk(m_general_lock); + // Acquire the table locks. + KScopedLightLockPair lk(src_page_table.m_general_lock, m_general_lock); const size_t num_pages{size / PageSize}; @@ -712,6 +772,723 @@ Result KPageTable::UnmapProcessMemory(VAddr dst_addr, size_t size, KPageTable& s R_SUCCEED(); } +Result KPageTable::SetupForIpcClient(PageLinkedList* page_list, size_t* out_blocks_needed, + VAddr address, size_t size, KMemoryPermission test_perm, + KMemoryState dst_state) { + // Validate pre-conditions. + ASSERT(this->IsLockedByCurrentThread()); + ASSERT(test_perm == KMemoryPermission::UserReadWrite || + test_perm == KMemoryPermission::UserRead); + + // Check that the address is in range. + R_UNLESS(this->Contains(address, size), ResultInvalidCurrentMemory); + + // Get the source permission. + const auto src_perm = static_cast<KMemoryPermission>( + (test_perm == KMemoryPermission::UserReadWrite) + ? KMemoryPermission::KernelReadWrite | KMemoryPermission::NotMapped + : KMemoryPermission::UserRead); + + // Get aligned extents. + const VAddr aligned_src_start = Common::AlignDown((address), PageSize); + const VAddr aligned_src_end = Common::AlignUp((address) + size, PageSize); + const VAddr mapping_src_start = Common::AlignUp((address), PageSize); + const VAddr mapping_src_end = Common::AlignDown((address) + size, PageSize); + + const auto aligned_src_last = (aligned_src_end)-1; + const auto mapping_src_last = (mapping_src_end)-1; + + // Get the test state and attribute mask. + KMemoryState test_state; + KMemoryAttribute test_attr_mask; + switch (dst_state) { + case KMemoryState::Ipc: + test_state = KMemoryState::FlagCanUseIpc; + test_attr_mask = + KMemoryAttribute::Uncached | KMemoryAttribute::DeviceShared | KMemoryAttribute::Locked; + break; + case KMemoryState::NonSecureIpc: + test_state = KMemoryState::FlagCanUseNonSecureIpc; + test_attr_mask = KMemoryAttribute::Uncached | KMemoryAttribute::Locked; + break; + case KMemoryState::NonDeviceIpc: + test_state = KMemoryState::FlagCanUseNonDeviceIpc; + test_attr_mask = KMemoryAttribute::Uncached | KMemoryAttribute::Locked; + break; + default: + R_THROW(ResultInvalidCombination); + } + + // Ensure that on failure, we roll back appropriately. + size_t mapped_size = 0; + ON_RESULT_FAILURE { + if (mapped_size > 0) { + this->CleanupForIpcClientOnServerSetupFailure(page_list, mapping_src_start, mapped_size, + src_perm); + } + }; + + size_t blocks_needed = 0; + + // Iterate, mapping as needed. + KMemoryBlockManager::const_iterator it = m_memory_block_manager.FindIterator(aligned_src_start); + while (true) { + const KMemoryInfo info = it->GetMemoryInfo(); + + // Validate the current block. + R_TRY(this->CheckMemoryState(info, test_state, test_state, test_perm, test_perm, + test_attr_mask, KMemoryAttribute::None)); + + if (mapping_src_start < mapping_src_end && (mapping_src_start) < info.GetEndAddress() && + info.GetAddress() < (mapping_src_end)) { + const auto cur_start = + info.GetAddress() >= (mapping_src_start) ? info.GetAddress() : (mapping_src_start); + const auto cur_end = mapping_src_last >= info.GetLastAddress() ? info.GetEndAddress() + : (mapping_src_end); + const size_t cur_size = cur_end - cur_start; + + if (info.GetAddress() < (mapping_src_start)) { + ++blocks_needed; + } + if (mapping_src_last < info.GetLastAddress()) { + ++blocks_needed; + } + + // Set the permissions on the block, if we need to. + if ((info.GetPermission() & KMemoryPermission::IpcLockChangeMask) != src_perm) { + R_TRY(Operate(cur_start, cur_size / PageSize, src_perm, + OperationType::ChangePermissions)); + } + + // Note that we mapped this part. + mapped_size += cur_size; + } + + // If the block is at the end, we're done. + if (aligned_src_last <= info.GetLastAddress()) { + break; + } + + // Advance. + ++it; + ASSERT(it != m_memory_block_manager.end()); + } + + if (out_blocks_needed != nullptr) { + ASSERT(blocks_needed <= KMemoryBlockManagerUpdateAllocator::MaxBlocks); + *out_blocks_needed = blocks_needed; + } + + R_SUCCEED(); +} + +Result KPageTable::SetupForIpcServer(VAddr* out_addr, size_t size, VAddr src_addr, + KMemoryPermission test_perm, KMemoryState dst_state, + KPageTable& src_page_table, bool send) { + ASSERT(this->IsLockedByCurrentThread()); + ASSERT(src_page_table.IsLockedByCurrentThread()); + + // Check that we can theoretically map. + const VAddr region_start = m_alias_region_start; + const size_t region_size = m_alias_region_end - m_alias_region_start; + R_UNLESS(size < region_size, ResultOutOfAddressSpace); + + // Get aligned source extents. + const VAddr src_start = src_addr; + const VAddr src_end = src_addr + size; + const VAddr aligned_src_start = Common::AlignDown((src_start), PageSize); + const VAddr aligned_src_end = Common::AlignUp((src_start) + size, PageSize); + const VAddr mapping_src_start = Common::AlignUp((src_start), PageSize); + const VAddr mapping_src_end = Common::AlignDown((src_start) + size, PageSize); + const size_t aligned_src_size = aligned_src_end - aligned_src_start; + const size_t mapping_src_size = + (mapping_src_start < mapping_src_end) ? (mapping_src_end - mapping_src_start) : 0; + + // Select a random address to map at. + VAddr dst_addr = + this->FindFreeArea(region_start, region_size / PageSize, aligned_src_size / PageSize, + PageSize, 0, this->GetNumGuardPages()); + + R_UNLESS(dst_addr != 0, ResultOutOfAddressSpace); + + // Check that we can perform the operation we're about to perform. + ASSERT(this->CanContain(dst_addr, aligned_src_size, dst_state)); + + // Create an update allocator. + Result allocator_result; + KMemoryBlockManagerUpdateAllocator allocator(std::addressof(allocator_result), + m_memory_block_slab_manager); + R_TRY(allocator_result); + + // We're going to perform an update, so create a helper. + KScopedPageTableUpdater updater(this); + + // Reserve space for any partial pages we allocate. + const size_t unmapped_size = aligned_src_size - mapping_src_size; + KScopedResourceReservation memory_reservation(m_resource_limit, + LimitableResource::PhysicalMemory, unmapped_size); + R_UNLESS(memory_reservation.Succeeded(), ResultLimitReached); + + // Ensure that we manage page references correctly. + PAddr start_partial_page = 0; + PAddr end_partial_page = 0; + VAddr cur_mapped_addr = dst_addr; + + // If the partial pages are mapped, an extra reference will have been opened. Otherwise, they'll + // free on scope exit. + SCOPE_EXIT({ + if (start_partial_page != 0) { + m_system.Kernel().MemoryManager().Close(start_partial_page, 1); + } + if (end_partial_page != 0) { + m_system.Kernel().MemoryManager().Close(end_partial_page, 1); + } + }); + + ON_RESULT_FAILURE { + if (cur_mapped_addr != dst_addr) { + ASSERT(Operate(dst_addr, (cur_mapped_addr - dst_addr) / PageSize, + KMemoryPermission::None, OperationType::Unmap) + .IsSuccess()); + } + }; + + // Allocate the start page as needed. + if (aligned_src_start < mapping_src_start) { + start_partial_page = + m_system.Kernel().MemoryManager().AllocateAndOpenContinuous(1, 1, m_allocate_option); + R_UNLESS(start_partial_page != 0, ResultOutOfMemory); + } + + // Allocate the end page as needed. + if (mapping_src_end < aligned_src_end && + (aligned_src_start < mapping_src_end || aligned_src_start == mapping_src_start)) { + end_partial_page = + m_system.Kernel().MemoryManager().AllocateAndOpenContinuous(1, 1, m_allocate_option); + R_UNLESS(end_partial_page != 0, ResultOutOfMemory); + } + + // Get the implementation. + auto& src_impl = src_page_table.PageTableImpl(); + + // Get the fill value for partial pages. + const auto fill_val = m_ipc_fill_value; + + // Begin traversal. + Common::PageTable::TraversalContext context; + Common::PageTable::TraversalEntry next_entry; + bool traverse_valid = src_impl.BeginTraversal(next_entry, context, aligned_src_start); + ASSERT(traverse_valid); + + // Prepare tracking variables. + PAddr cur_block_addr = next_entry.phys_addr; + size_t cur_block_size = + next_entry.block_size - ((cur_block_addr) & (next_entry.block_size - 1)); + size_t tot_block_size = cur_block_size; + + // Map the start page, if we have one. + if (start_partial_page != 0) { + // Ensure the page holds correct data. + const VAddr start_partial_virt = + GetHeapVirtualAddress(m_system.Kernel().MemoryLayout(), start_partial_page); + if (send) { + const size_t partial_offset = src_start - aligned_src_start; + size_t copy_size, clear_size; + if (src_end < mapping_src_start) { + copy_size = size; + clear_size = mapping_src_start - src_end; + } else { + copy_size = mapping_src_start - src_start; + clear_size = 0; + } + + std::memset(m_system.Memory().GetPointer<void>(start_partial_virt), fill_val, + partial_offset); + std::memcpy( + m_system.Memory().GetPointer<void>(start_partial_virt + partial_offset), + m_system.Memory().GetPointer<void>( + GetHeapVirtualAddress(m_system.Kernel().MemoryLayout(), cur_block_addr) + + partial_offset), + copy_size); + if (clear_size > 0) { + std::memset(m_system.Memory().GetPointer<void>(start_partial_virt + partial_offset + + copy_size), + fill_val, clear_size); + } + } else { + std::memset(m_system.Memory().GetPointer<void>(start_partial_virt), fill_val, PageSize); + } + + // Map the page. + R_TRY(Operate(cur_mapped_addr, 1, test_perm, OperationType::Map, start_partial_page)); + + // Update tracking extents. + cur_mapped_addr += PageSize; + cur_block_addr += PageSize; + cur_block_size -= PageSize; + + // If the block's size was one page, we may need to continue traversal. + if (cur_block_size == 0 && aligned_src_size > PageSize) { + traverse_valid = src_impl.ContinueTraversal(next_entry, context); + ASSERT(traverse_valid); + + cur_block_addr = next_entry.phys_addr; + cur_block_size = next_entry.block_size; + tot_block_size += next_entry.block_size; + } + } + + // Map the remaining pages. + while (aligned_src_start + tot_block_size < mapping_src_end) { + // Continue the traversal. + traverse_valid = src_impl.ContinueTraversal(next_entry, context); + ASSERT(traverse_valid); + + // Process the block. + if (next_entry.phys_addr != cur_block_addr + cur_block_size) { + // Map the block we've been processing so far. + R_TRY(Operate(cur_mapped_addr, cur_block_size / PageSize, test_perm, OperationType::Map, + cur_block_addr)); + + // Update tracking extents. + cur_mapped_addr += cur_block_size; + cur_block_addr = next_entry.phys_addr; + cur_block_size = next_entry.block_size; + } else { + cur_block_size += next_entry.block_size; + } + tot_block_size += next_entry.block_size; + } + + // Handle the last direct-mapped page. + if (const VAddr mapped_block_end = aligned_src_start + tot_block_size - cur_block_size; + mapped_block_end < mapping_src_end) { + const size_t last_block_size = mapping_src_end - mapped_block_end; + + // Map the last block. + R_TRY(Operate(cur_mapped_addr, last_block_size / PageSize, test_perm, OperationType::Map, + cur_block_addr)); + + // Update tracking extents. + cur_mapped_addr += last_block_size; + cur_block_addr += last_block_size; + if (mapped_block_end + cur_block_size < aligned_src_end && + cur_block_size == last_block_size) { + traverse_valid = src_impl.ContinueTraversal(next_entry, context); + ASSERT(traverse_valid); + + cur_block_addr = next_entry.phys_addr; + } + } + + // Map the end page, if we have one. + if (end_partial_page != 0) { + // Ensure the page holds correct data. + const VAddr end_partial_virt = + GetHeapVirtualAddress(m_system.Kernel().MemoryLayout(), end_partial_page); + if (send) { + const size_t copy_size = src_end - mapping_src_end; + std::memcpy(m_system.Memory().GetPointer<void>(end_partial_virt), + m_system.Memory().GetPointer<void>(GetHeapVirtualAddress( + m_system.Kernel().MemoryLayout(), cur_block_addr)), + copy_size); + std::memset(m_system.Memory().GetPointer<void>(end_partial_virt + copy_size), fill_val, + PageSize - copy_size); + } else { + std::memset(m_system.Memory().GetPointer<void>(end_partial_virt), fill_val, PageSize); + } + + // Map the page. + R_TRY(Operate(cur_mapped_addr, 1, test_perm, OperationType::Map, end_partial_page)); + } + + // Update memory blocks to reflect our changes + m_memory_block_manager.Update(std::addressof(allocator), dst_addr, aligned_src_size / PageSize, + dst_state, test_perm, KMemoryAttribute::None, + KMemoryBlockDisableMergeAttribute::Normal, + KMemoryBlockDisableMergeAttribute::None); + + // Set the output address. + *out_addr = dst_addr + (src_start - aligned_src_start); + + // We succeeded. + memory_reservation.Commit(); + R_SUCCEED(); +} + +Result KPageTable::SetupForIpc(VAddr* out_dst_addr, size_t size, VAddr src_addr, + KPageTable& src_page_table, KMemoryPermission test_perm, + KMemoryState dst_state, bool send) { + // For convenience, alias this. + KPageTable& dst_page_table = *this; + + // Acquire the table locks. + KScopedLightLockPair lk(src_page_table.m_general_lock, dst_page_table.m_general_lock); + + // We're going to perform an update, so create a helper. + KScopedPageTableUpdater updater(std::addressof(src_page_table)); + + // Perform client setup. + size_t num_allocator_blocks; + R_TRY(src_page_table.SetupForIpcClient(updater.GetPageList(), + std::addressof(num_allocator_blocks), src_addr, size, + test_perm, dst_state)); + + // Create an update allocator. + Result allocator_result; + KMemoryBlockManagerUpdateAllocator allocator(std::addressof(allocator_result), + src_page_table.m_memory_block_slab_manager, + num_allocator_blocks); + R_TRY(allocator_result); + + // Get the mapped extents. + const VAddr src_map_start = Common::AlignUp((src_addr), PageSize); + const VAddr src_map_end = Common::AlignDown((src_addr) + size, PageSize); + const size_t src_map_size = src_map_end - src_map_start; + + // Ensure that we clean up appropriately if we fail after this. + const auto src_perm = static_cast<KMemoryPermission>( + (test_perm == KMemoryPermission::UserReadWrite) + ? KMemoryPermission::KernelReadWrite | KMemoryPermission::NotMapped + : KMemoryPermission::UserRead); + ON_RESULT_FAILURE { + if (src_map_end > src_map_start) { + src_page_table.CleanupForIpcClientOnServerSetupFailure( + updater.GetPageList(), src_map_start, src_map_size, src_perm); + } + }; + + // Perform server setup. + R_TRY(dst_page_table.SetupForIpcServer(out_dst_addr, size, src_addr, test_perm, dst_state, + src_page_table, send)); + + // If anything was mapped, ipc-lock the pages. + if (src_map_start < src_map_end) { + // Get the source permission. + src_page_table.m_memory_block_manager.UpdateLock(std::addressof(allocator), src_map_start, + (src_map_end - src_map_start) / PageSize, + &KMemoryBlock::LockForIpc, src_perm); + } + + R_SUCCEED(); +} + +Result KPageTable::CleanupForIpcServer(VAddr address, size_t size, KMemoryState dst_state) { + // Validate the address. + R_UNLESS(this->Contains(address, size), ResultInvalidCurrentMemory); + + // Lock the table. + KScopedLightLock lk(m_general_lock); + + // Validate the memory state. + size_t num_allocator_blocks; + R_TRY(this->CheckMemoryState(std::addressof(num_allocator_blocks), address, size, + KMemoryState::All, dst_state, KMemoryPermission::UserRead, + KMemoryPermission::UserRead, KMemoryAttribute::All, + KMemoryAttribute::None)); + + // Create an update allocator. + Result allocator_result; + KMemoryBlockManagerUpdateAllocator allocator(std::addressof(allocator_result), + m_memory_block_slab_manager, num_allocator_blocks); + R_TRY(allocator_result); + + // We're going to perform an update, so create a helper. + KScopedPageTableUpdater updater(this); + + // Get aligned extents. + const VAddr aligned_start = Common::AlignDown((address), PageSize); + const VAddr aligned_end = Common::AlignUp((address) + size, PageSize); + const size_t aligned_size = aligned_end - aligned_start; + const size_t aligned_num_pages = aligned_size / PageSize; + + // Unmap the pages. + R_TRY(Operate(aligned_start, aligned_num_pages, KMemoryPermission::None, OperationType::Unmap)); + + // Update memory blocks. + m_memory_block_manager.Update(std::addressof(allocator), aligned_start, aligned_num_pages, + KMemoryState::None, KMemoryPermission::None, + KMemoryAttribute::None, KMemoryBlockDisableMergeAttribute::None, + KMemoryBlockDisableMergeAttribute::Normal); + + // Release from the resource limit as relevant. + const VAddr mapping_start = Common::AlignUp((address), PageSize); + const VAddr mapping_end = Common::AlignDown((address) + size, PageSize); + const size_t mapping_size = (mapping_start < mapping_end) ? mapping_end - mapping_start : 0; + m_resource_limit->Release(LimitableResource::PhysicalMemory, aligned_size - mapping_size); + + R_SUCCEED(); +} + +Result KPageTable::CleanupForIpcClient(VAddr address, size_t size, KMemoryState dst_state) { + // Validate the address. + R_UNLESS(this->Contains(address, size), ResultInvalidCurrentMemory); + + // Get aligned source extents. + const VAddr mapping_start = Common::AlignUp((address), PageSize); + const VAddr mapping_end = Common::AlignDown((address) + size, PageSize); + const VAddr mapping_last = mapping_end - 1; + const size_t mapping_size = (mapping_start < mapping_end) ? (mapping_end - mapping_start) : 0; + + // If nothing was mapped, we're actually done immediately. + R_SUCCEED_IF(mapping_size == 0); + + // Get the test state and attribute mask. + KMemoryState test_state; + KMemoryAttribute test_attr_mask; + switch (dst_state) { + case KMemoryState::Ipc: + test_state = KMemoryState::FlagCanUseIpc; + test_attr_mask = + KMemoryAttribute::Uncached | KMemoryAttribute::DeviceShared | KMemoryAttribute::Locked; + break; + case KMemoryState::NonSecureIpc: + test_state = KMemoryState::FlagCanUseNonSecureIpc; + test_attr_mask = KMemoryAttribute::Uncached | KMemoryAttribute::Locked; + break; + case KMemoryState::NonDeviceIpc: + test_state = KMemoryState::FlagCanUseNonDeviceIpc; + test_attr_mask = KMemoryAttribute::Uncached | KMemoryAttribute::Locked; + break; + default: + R_THROW(ResultInvalidCombination); + } + + // Lock the table. + // NOTE: Nintendo does this *after* creating the updater below, but this does not follow + // convention elsewhere in KPageTable. + KScopedLightLock lk(m_general_lock); + + // We're going to perform an update, so create a helper. + KScopedPageTableUpdater updater(this); + + // Ensure that on failure, we roll back appropriately. + size_t mapped_size = 0; + ON_RESULT_FAILURE { + if (mapped_size > 0) { + // Determine where the mapping ends. + const auto mapped_end = (mapping_start) + mapped_size; + const auto mapped_last = mapped_end - 1; + + // Get current and next iterators. + KMemoryBlockManager::const_iterator start_it = + m_memory_block_manager.FindIterator(mapping_start); + KMemoryBlockManager::const_iterator next_it = start_it; + ++next_it; + + // Get the current block info. + KMemoryInfo cur_info = start_it->GetMemoryInfo(); + + // Create tracking variables. + VAddr cur_address = cur_info.GetAddress(); + size_t cur_size = cur_info.GetSize(); + bool cur_perm_eq = cur_info.GetPermission() == cur_info.GetOriginalPermission(); + bool cur_needs_set_perm = !cur_perm_eq && cur_info.GetIpcLockCount() == 1; + bool first = + cur_info.GetIpcDisableMergeCount() == 1 && + (cur_info.GetDisableMergeAttribute() & KMemoryBlockDisableMergeAttribute::Locked) == + KMemoryBlockDisableMergeAttribute::None; + + while (((cur_address) + cur_size - 1) < mapped_last) { + // Check that we have a next block. + ASSERT(next_it != m_memory_block_manager.end()); + + // Get the next info. + const KMemoryInfo next_info = next_it->GetMemoryInfo(); + + // Check if we can consolidate the next block's permission set with the current one. + + const bool next_perm_eq = + next_info.GetPermission() == next_info.GetOriginalPermission(); + const bool next_needs_set_perm = !next_perm_eq && next_info.GetIpcLockCount() == 1; + if (cur_perm_eq == next_perm_eq && cur_needs_set_perm == next_needs_set_perm && + cur_info.GetOriginalPermission() == next_info.GetOriginalPermission()) { + // We can consolidate the reprotection for the current and next block into a + // single call. + cur_size += next_info.GetSize(); + } else { + // We have to operate on the current block. + if ((cur_needs_set_perm || first) && !cur_perm_eq) { + ASSERT(Operate(cur_address, cur_size / PageSize, cur_info.GetPermission(), + OperationType::ChangePermissions) + .IsSuccess()); + } + + // Advance. + cur_address = next_info.GetAddress(); + cur_size = next_info.GetSize(); + first = false; + } + + // Advance. + cur_info = next_info; + cur_perm_eq = next_perm_eq; + cur_needs_set_perm = next_needs_set_perm; + ++next_it; + } + + // Process the last block. + if ((first || cur_needs_set_perm) && !cur_perm_eq) { + ASSERT(Operate(cur_address, cur_size / PageSize, cur_info.GetPermission(), + OperationType::ChangePermissions) + .IsSuccess()); + } + } + }; + + // Iterate, reprotecting as needed. + { + // Get current and next iterators. + KMemoryBlockManager::const_iterator start_it = + m_memory_block_manager.FindIterator(mapping_start); + KMemoryBlockManager::const_iterator next_it = start_it; + ++next_it; + + // Validate the current block. + KMemoryInfo cur_info = start_it->GetMemoryInfo(); + ASSERT(this->CheckMemoryState(cur_info, test_state, test_state, KMemoryPermission::None, + KMemoryPermission::None, + test_attr_mask | KMemoryAttribute::IpcLocked, + KMemoryAttribute::IpcLocked) + .IsSuccess()); + + // Create tracking variables. + VAddr cur_address = cur_info.GetAddress(); + size_t cur_size = cur_info.GetSize(); + bool cur_perm_eq = cur_info.GetPermission() == cur_info.GetOriginalPermission(); + bool cur_needs_set_perm = !cur_perm_eq && cur_info.GetIpcLockCount() == 1; + bool first = + cur_info.GetIpcDisableMergeCount() == 1 && + (cur_info.GetDisableMergeAttribute() & KMemoryBlockDisableMergeAttribute::Locked) == + KMemoryBlockDisableMergeAttribute::None; + + while ((cur_address + cur_size - 1) < mapping_last) { + // Check that we have a next block. + ASSERT(next_it != m_memory_block_manager.end()); + + // Get the next info. + const KMemoryInfo next_info = next_it->GetMemoryInfo(); + + // Validate the next block. + ASSERT(this->CheckMemoryState(next_info, test_state, test_state, + KMemoryPermission::None, KMemoryPermission::None, + test_attr_mask | KMemoryAttribute::IpcLocked, + KMemoryAttribute::IpcLocked) + .IsSuccess()); + + // Check if we can consolidate the next block's permission set with the current one. + const bool next_perm_eq = + next_info.GetPermission() == next_info.GetOriginalPermission(); + const bool next_needs_set_perm = !next_perm_eq && next_info.GetIpcLockCount() == 1; + if (cur_perm_eq == next_perm_eq && cur_needs_set_perm == next_needs_set_perm && + cur_info.GetOriginalPermission() == next_info.GetOriginalPermission()) { + // We can consolidate the reprotection for the current and next block into a single + // call. + cur_size += next_info.GetSize(); + } else { + // We have to operate on the current block. + if ((cur_needs_set_perm || first) && !cur_perm_eq) { + R_TRY(Operate(cur_address, cur_size / PageSize, + cur_needs_set_perm ? cur_info.GetOriginalPermission() + : cur_info.GetPermission(), + OperationType::ChangePermissions)); + } + + // Mark that we mapped the block. + mapped_size += cur_size; + + // Advance. + cur_address = next_info.GetAddress(); + cur_size = next_info.GetSize(); + first = false; + } + + // Advance. + cur_info = next_info; + cur_perm_eq = next_perm_eq; + cur_needs_set_perm = next_needs_set_perm; + ++next_it; + } + + // Process the last block. + const auto lock_count = + cur_info.GetIpcLockCount() + + (next_it != m_memory_block_manager.end() + ? (next_it->GetIpcDisableMergeCount() - next_it->GetIpcLockCount()) + : 0); + if ((first || cur_needs_set_perm || (lock_count == 1)) && !cur_perm_eq) { + R_TRY(Operate(cur_address, cur_size / PageSize, + cur_needs_set_perm ? cur_info.GetOriginalPermission() + : cur_info.GetPermission(), + OperationType::ChangePermissions)); + } + } + + // Create an update allocator. + // NOTE: Guaranteed zero blocks needed here. + Result allocator_result; + KMemoryBlockManagerUpdateAllocator allocator(std::addressof(allocator_result), + m_memory_block_slab_manager, 0); + R_TRY(allocator_result); + + // Unlock the pages. + m_memory_block_manager.UpdateLock(std::addressof(allocator), mapping_start, + mapping_size / PageSize, &KMemoryBlock::UnlockForIpc, + KMemoryPermission::None); + + R_SUCCEED(); +} + +void KPageTable::CleanupForIpcClientOnServerSetupFailure([[maybe_unused]] PageLinkedList* page_list, + VAddr address, size_t size, + KMemoryPermission prot_perm) { + ASSERT(this->IsLockedByCurrentThread()); + ASSERT(Common::IsAligned(address, PageSize)); + ASSERT(Common::IsAligned(size, PageSize)); + + // Get the mapped extents. + const VAddr src_map_start = address; + const VAddr src_map_end = address + size; + const VAddr src_map_last = src_map_end - 1; + + // This function is only invoked when there's something to do. + ASSERT(src_map_end > src_map_start); + + // Iterate over blocks, fixing permissions. + KMemoryBlockManager::const_iterator it = m_memory_block_manager.FindIterator(address); + while (true) { + const KMemoryInfo info = it->GetMemoryInfo(); + + const auto cur_start = + info.GetAddress() >= src_map_start ? info.GetAddress() : src_map_start; + const auto cur_end = + src_map_last <= info.GetLastAddress() ? src_map_end : info.GetEndAddress(); + + // If we can, fix the protections on the block. + if ((info.GetIpcLockCount() == 0 && + (info.GetPermission() & KMemoryPermission::IpcLockChangeMask) != prot_perm) || + (info.GetIpcLockCount() != 0 && + (info.GetOriginalPermission() & KMemoryPermission::IpcLockChangeMask) != prot_perm)) { + // Check if we actually need to fix the protections on the block. + if (cur_end == src_map_end || info.GetAddress() <= src_map_start || + (info.GetPermission() & KMemoryPermission::IpcLockChangeMask) != prot_perm) { + ASSERT(Operate(cur_start, (cur_end - cur_start) / PageSize, info.GetPermission(), + OperationType::ChangePermissions) + .IsSuccess()); + } + } + + // If we're past the end of the region, we're done. + if (src_map_last <= info.GetLastAddress()) { + break; + } + + // Advance. + ++it; + ASSERT(it != m_memory_block_manager.end()); + } +} + void KPageTable::HACK_OpenPages(PAddr phys_addr, size_t num_pages) { m_system.Kernel().MemoryManager().OpenFirst(phys_addr, num_pages); } @@ -858,7 +1635,7 @@ Result KPageTable::MapPhysicalMemory(VAddr address, size_t size) { R_TRY(allocator_result); // We're going to perform an update, so create a helper. - // KScopedPageTableUpdater updater(this); + KScopedPageTableUpdater updater(this); // Prepare to iterate over the memory. auto pg_it = pg.Nodes().begin(); @@ -1074,7 +1851,7 @@ Result KPageTable::UnmapPhysicalMemory(VAddr address, size_t size) { R_TRY(allocator_result); // We're going to perform an update, so create a helper. - // KScopedPageTableUpdater updater(this); + KScopedPageTableUpdater updater(this); // Separate the mapping. R_TRY(Operate(map_start_address, (map_last_address + 1 - map_start_address) / PageSize, @@ -1935,6 +2712,24 @@ Result KPageTable::UnlockForDeviceAddressSpace(VAddr address, size_t size) { R_SUCCEED(); } +Result KPageTable::LockForIpcUserBuffer(PAddr* out, VAddr address, size_t size) { + R_RETURN(this->LockMemoryAndOpen( + nullptr, out, address, size, KMemoryState::FlagCanIpcUserBuffer, + KMemoryState::FlagCanIpcUserBuffer, KMemoryPermission::All, + KMemoryPermission::UserReadWrite, KMemoryAttribute::All, KMemoryAttribute::None, + static_cast<KMemoryPermission>(KMemoryPermission::NotMapped | + KMemoryPermission::KernelReadWrite), + KMemoryAttribute::Locked)); +} + +Result KPageTable::UnlockForIpcUserBuffer(VAddr address, size_t size) { + R_RETURN(this->UnlockMemory(address, size, KMemoryState::FlagCanIpcUserBuffer, + KMemoryState::FlagCanIpcUserBuffer, KMemoryPermission::None, + KMemoryPermission::None, KMemoryAttribute::All, + KMemoryAttribute::Locked, KMemoryPermission::UserReadWrite, + KMemoryAttribute::Locked, nullptr)); +} + Result KPageTable::LockForCodeMemory(KPageGroup* out, VAddr addr, size_t size) { R_RETURN(this->LockMemoryAndOpen( out, nullptr, addr, size, KMemoryState::FlagCanCodeMemory, KMemoryState::FlagCanCodeMemory, @@ -2038,6 +2833,17 @@ Result KPageTable::Operate(VAddr addr, size_t num_pages, KMemoryPermission perm, R_SUCCEED(); } +void KPageTable::FinalizeUpdate(PageLinkedList* page_list) { + while (page_list->Peek()) { + [[maybe_unused]] auto page = page_list->Pop(); + + // TODO(bunnei): Free pages once they are allocated in guest memory + // ASSERT(this->GetPageTableManager().IsInPageTableHeap(page)); + // ASSERT(this->GetPageTableManager().GetRefCount(page) == 0); + // this->GetPageTableManager().Free(page); + } +} + VAddr KPageTable::GetRegionAddress(KMemoryState state) const { switch (state) { case KMemoryState::Free: diff --git a/src/core/hle/kernel/k_page_table.h b/src/core/hle/kernel/k_page_table.h index 753e07c94..950850291 100644 --- a/src/core/hle/kernel/k_page_table.h +++ b/src/core/hle/kernel/k_page_table.h @@ -16,6 +16,7 @@ #include "core/hle/kernel/k_memory_layout.h" #include "core/hle/kernel/k_memory_manager.h" #include "core/hle/result.h" +#include "core/memory.h" namespace Core { class System; @@ -83,6 +84,14 @@ public: Result UnlockForDeviceAddressSpace(VAddr addr, size_t size); + Result LockForIpcUserBuffer(PAddr* out, VAddr address, size_t size); + Result UnlockForIpcUserBuffer(VAddr address, size_t size); + + Result SetupForIpc(VAddr* out_dst_addr, size_t size, VAddr src_addr, KPageTable& src_page_table, + KMemoryPermission test_perm, KMemoryState dst_state, bool send); + Result CleanupForIpcServer(VAddr address, size_t size, KMemoryState dst_state); + Result CleanupForIpcClient(VAddr address, size_t size, KMemoryState dst_state); + Result LockForCodeMemory(KPageGroup* out, VAddr addr, size_t size); Result UnlockForCodeMemory(VAddr addr, size_t size, const KPageGroup& pg); Result MakeAndOpenPageGroup(KPageGroup* out, VAddr address, size_t num_pages, @@ -100,6 +109,45 @@ public: bool CanContain(VAddr addr, size_t size, KMemoryState state) const; +protected: + struct PageLinkedList { + private: + struct Node { + Node* m_next; + std::array<u8, PageSize - sizeof(Node*)> m_buffer; + }; + + public: + constexpr PageLinkedList() = default; + + void Push(Node* n) { + ASSERT(Common::IsAligned(reinterpret_cast<uintptr_t>(n), PageSize)); + n->m_next = m_root; + m_root = n; + } + + void Push(Core::Memory::Memory& memory, VAddr addr) { + this->Push(memory.GetPointer<Node>(addr)); + } + + Node* Peek() const { + return m_root; + } + + Node* Pop() { + Node* const r = m_root; + + m_root = r->m_next; + r->m_next = nullptr; + + return r; + } + + private: + Node* m_root{}; + }; + static_assert(std::is_trivially_destructible<PageLinkedList>::value); + private: enum class OperationType : u32 { Map = 0, @@ -128,6 +176,7 @@ private: OperationType operation); Result Operate(VAddr addr, size_t num_pages, KMemoryPermission perm, OperationType operation, PAddr map_addr = 0); + void FinalizeUpdate(PageLinkedList* page_list); VAddr GetRegionAddress(KMemoryState state) const; size_t GetRegionSize(KMemoryState state) const; @@ -204,6 +253,14 @@ private: return *out != 0; } + Result SetupForIpcClient(PageLinkedList* page_list, size_t* out_blocks_needed, VAddr address, + size_t size, KMemoryPermission test_perm, KMemoryState dst_state); + Result SetupForIpcServer(VAddr* out_addr, size_t size, VAddr src_addr, + KMemoryPermission test_perm, KMemoryState dst_state, + KPageTable& src_page_table, bool send); + void CleanupForIpcClientOnServerSetupFailure(PageLinkedList* page_list, VAddr address, + size_t size, KMemoryPermission prot_perm); + // HACK: These will be removed once we automatically manage page reference counts. void HACK_OpenPages(PAddr phys_addr, size_t num_pages); void HACK_ClosePages(VAddr virt_addr, size_t num_pages); @@ -325,6 +382,31 @@ public: addr + size - 1 <= m_address_space_end - 1; } +public: + static VAddr GetLinearMappedVirtualAddress(const KMemoryLayout& layout, PAddr addr) { + return layout.GetLinearVirtualAddress(addr); + } + + static PAddr GetLinearMappedPhysicalAddress(const KMemoryLayout& layout, VAddr addr) { + return layout.GetLinearPhysicalAddress(addr); + } + + static VAddr GetHeapVirtualAddress(const KMemoryLayout& layout, PAddr addr) { + return GetLinearMappedVirtualAddress(layout, addr); + } + + static PAddr GetHeapPhysicalAddress(const KMemoryLayout& layout, VAddr addr) { + return GetLinearMappedPhysicalAddress(layout, addr); + } + + static VAddr GetPageTableVirtualAddress(const KMemoryLayout& layout, PAddr addr) { + return GetLinearMappedVirtualAddress(layout, addr); + } + + static PAddr GetPageTablePhysicalAddress(const KMemoryLayout& layout, VAddr addr) { + return GetLinearMappedPhysicalAddress(layout, addr); + } + private: constexpr bool IsKernel() const { return m_is_kernel; @@ -340,6 +422,24 @@ private: } private: + class KScopedPageTableUpdater { + private: + KPageTable* m_pt{}; + PageLinkedList m_ll; + + public: + explicit KScopedPageTableUpdater(KPageTable* pt) : m_pt(pt) {} + explicit KScopedPageTableUpdater(KPageTable& pt) : KScopedPageTableUpdater(&pt) {} + ~KScopedPageTableUpdater() { + m_pt->FinalizeUpdate(this->GetPageList()); + } + + PageLinkedList* GetPageList() { + return &m_ll; + } + }; + +private: VAddr m_address_space_start{}; VAddr m_address_space_end{}; VAddr m_heap_region_start{}; diff --git a/src/core/hle/kernel/svc_results.h b/src/core/hle/kernel/svc_results.h index f27cade33..b7ca53085 100644 --- a/src/core/hle/kernel/svc_results.h +++ b/src/core/hle/kernel/svc_results.h @@ -37,6 +37,7 @@ constexpr Result ResultInvalidState{ErrorModule::Kernel, 125}; constexpr Result ResultReservedUsed{ErrorModule::Kernel, 126}; constexpr Result ResultPortClosed{ErrorModule::Kernel, 131}; constexpr Result ResultLimitReached{ErrorModule::Kernel, 132}; +constexpr Result ResultOutOfAddressSpace{ErrorModule::Kernel, 259}; constexpr Result ResultInvalidId{ErrorModule::Kernel, 519}; } // namespace Kernel |