From d0162fc3d7841190bf163afc754b0ec0cdbd7462 Mon Sep 17 00:00:00 2001 From: bunnei Date: Wed, 8 Apr 2020 18:53:52 -0400 Subject: kernel: shared_memory: Refactor for new VMM. --- src/core/hle/kernel/shared_memory.cpp | 151 +++++++--------------------------- src/core/hle/kernel/shared_memory.h | 127 +++++++--------------------- 2 files changed, 58 insertions(+), 220 deletions(-) (limited to 'src/core') diff --git a/src/core/hle/kernel/shared_memory.cpp b/src/core/hle/kernel/shared_memory.cpp index afb2e3fc2..e28da6869 100644 --- a/src/core/hle/kernel/shared_memory.cpp +++ b/src/core/hle/kernel/shared_memory.cpp @@ -2,149 +2,56 @@ // Licensed under GPLv2 or any later version // Refer to the license.txt file included. -#include - #include "common/assert.h" -#include "common/logging/log.h" -#include "core/hle/kernel/errors.h" +#include "core/core.h" #include "core/hle/kernel/kernel.h" +#include "core/hle/kernel/memory/page_table.h" #include "core/hle/kernel/shared_memory.h" namespace Kernel { -SharedMemory::SharedMemory(KernelCore& kernel) : Object{kernel} {} -SharedMemory::~SharedMemory() = default; - -std::shared_ptr SharedMemory::Create(KernelCore& kernel, Process* owner_process, - u64 size, MemoryPermission permissions, - MemoryPermission other_permissions, - VAddr address, MemoryRegion region, - std::string name) { - std::shared_ptr shared_memory = std::make_shared(kernel); - - shared_memory->owner_process = owner_process; - shared_memory->name = std::move(name); - shared_memory->size = size; - shared_memory->permissions = permissions; - shared_memory->other_permissions = other_permissions; - - if (address == 0) { - shared_memory->backing_block = std::make_shared(size); - shared_memory->backing_block_offset = 0; - - // Refresh the address mappings for the current process. - if (kernel.CurrentProcess() != nullptr) { - kernel.CurrentProcess()->VMManager().RefreshMemoryBlockMappings( - shared_memory->backing_block.get()); - } - } else { - const auto& vm_manager = shared_memory->owner_process->VMManager(); +SharedMemory::SharedMemory(KernelCore& kernel, Core::DeviceMemory& device_memory) + : Object{kernel}, device_memory{device_memory} {} - // The memory is already available and mapped in the owner process. - const auto vma = vm_manager.FindVMA(address); - ASSERT_MSG(vm_manager.IsValidHandle(vma), "Invalid memory address"); - ASSERT_MSG(vma->second.backing_block, "Backing block doesn't exist for address"); - - // The returned VMA might be a bigger one encompassing the desired address. - const auto vma_offset = address - vma->first; - ASSERT_MSG(vma_offset + size <= vma->second.size, - "Shared memory exceeds bounds of mapped block"); - - shared_memory->backing_block = vma->second.backing_block; - shared_memory->backing_block_offset = vma->second.offset + vma_offset; - } - - shared_memory->base_address = address; +SharedMemory::~SharedMemory() = default; - return shared_memory; -} +std::shared_ptr SharedMemory::Create( + KernelCore& kernel, Core::DeviceMemory& device_memory, Process* owner_process, + Memory::PageLinkedList&& page_list, Memory::MemoryPermission owner_permission, + Memory::MemoryPermission user_permission, PAddr physical_address, std::size_t size, + std::string name) { -std::shared_ptr SharedMemory::CreateForApplet( - KernelCore& kernel, std::shared_ptr heap_block, std::size_t offset, - u64 size, MemoryPermission permissions, MemoryPermission other_permissions, std::string name) { - std::shared_ptr shared_memory = std::make_shared(kernel); + std::shared_ptr shared_memory{ + std::make_shared(kernel, device_memory)}; - shared_memory->owner_process = nullptr; - shared_memory->name = std::move(name); + shared_memory->owner_process = owner_process; + shared_memory->page_list = std::move(page_list); + shared_memory->owner_permission = owner_permission; + shared_memory->user_permission = user_permission; + shared_memory->physical_address = physical_address; shared_memory->size = size; - shared_memory->permissions = permissions; - shared_memory->other_permissions = other_permissions; - shared_memory->backing_block = std::move(heap_block); - shared_memory->backing_block_offset = offset; - shared_memory->base_address = - kernel.CurrentProcess()->VMManager().GetHeapRegionBaseAddress() + offset; + shared_memory->name = name; return shared_memory; } -ResultCode SharedMemory::Map(Process& target_process, VAddr address, MemoryPermission permissions, - MemoryPermission other_permissions) { - const MemoryPermission own_other_permissions = - &target_process == owner_process ? this->permissions : this->other_permissions; - - // Automatically allocated memory blocks can only be mapped with other_permissions = DontCare - if (base_address == 0 && other_permissions != MemoryPermission::DontCare) { - return ERR_INVALID_MEMORY_PERMISSIONS; - } - - // Error out if the requested permissions don't match what the creator process allows. - if (static_cast(permissions) & ~static_cast(own_other_permissions)) { - LOG_ERROR(Kernel, "cannot map id={}, address=0x{:X} name={}, permissions don't match", - GetObjectId(), address, name); - return ERR_INVALID_MEMORY_PERMISSIONS; - } +ResultCode SharedMemory::Map(Process& target_process, VAddr address, std::size_t size, + Memory::MemoryPermission permission) { + const u64 page_count{(size + Memory::PageSize - 1) / Memory::PageSize}; - // Error out if the provided permissions are not compatible with what the creator process needs. - if (other_permissions != MemoryPermission::DontCare && - static_cast(this->permissions) & ~static_cast(other_permissions)) { - LOG_ERROR(Kernel, "cannot map id={}, address=0x{:X} name={}, permissions don't match", - GetObjectId(), address, name); - return ERR_INVALID_MEMORY_PERMISSIONS; + if (page_list.GetNumPages() != page_count) { + UNIMPLEMENTED(); } - VAddr target_address = address; + Memory::MemoryPermission expected = + &target_process == owner_process ? owner_permission : user_permission; - // Map the memory block into the target process - auto result = target_process.VMManager().MapMemoryBlock( - target_address, backing_block, backing_block_offset, size, MemoryState::Shared); - if (result.Failed()) { - LOG_ERROR( - Kernel, - "cannot map id={}, target_address=0x{:X} name={}, error mapping to virtual memory", - GetObjectId(), target_address, name); - return result.Code(); + if (permission != expected) { + UNIMPLEMENTED(); } - return target_process.VMManager().ReprotectRange(target_address, size, - ConvertPermissions(permissions)); -} - -ResultCode SharedMemory::Unmap(Process& target_process, VAddr address, u64 unmap_size) { - if (unmap_size != size) { - LOG_ERROR(Kernel, - "Invalid size passed to Unmap. Size must be equal to the size of the " - "memory managed. Shared memory size=0x{:016X}, Unmap size=0x{:016X}", - size, unmap_size); - return ERR_INVALID_SIZE; - } - - // TODO(Subv): Verify what happens if the application tries to unmap an address that is not - // mapped to a SharedMemory. - return target_process.VMManager().UnmapRange(address, size); -} - -VMAPermission SharedMemory::ConvertPermissions(MemoryPermission permission) { - u32 masked_permissions = - static_cast(permission) & static_cast(MemoryPermission::ReadWriteExecute); - return static_cast(masked_permissions); -} - -u8* SharedMemory::GetPointer(std::size_t offset) { - return backing_block->data() + backing_block_offset + offset; -} - -const u8* SharedMemory::GetPointer(std::size_t offset) const { - return backing_block->data() + backing_block_offset + offset; + return target_process.PageTable().MapPages(address, page_list, Memory::MemoryState::Shared, + permission); } } // namespace Kernel diff --git a/src/core/hle/kernel/shared_memory.h b/src/core/hle/kernel/shared_memory.h index 014951d82..06fe693de 100644 --- a/src/core/hle/kernel/shared_memory.h +++ b/src/core/hle/kernel/shared_memory.h @@ -8,8 +8,10 @@ #include #include "common/common_types.h" +#include "core/device_memory.h" +#include "core/hle/kernel/memory/memory_block.h" +#include "core/hle/kernel/memory/page_linked_list.h" #include "core/hle/kernel/object.h" -#include "core/hle/kernel/physical_memory.h" #include "core/hle/kernel/process.h" #include "core/hle/result.h" @@ -17,63 +19,21 @@ namespace Kernel { class KernelCore; -/// Permissions for mapped shared memory blocks -enum class MemoryPermission : u32 { - None = 0, - Read = (1u << 0), - Write = (1u << 1), - ReadWrite = (Read | Write), - Execute = (1u << 2), - ReadExecute = (Read | Execute), - WriteExecute = (Write | Execute), - ReadWriteExecute = (Read | Write | Execute), - DontCare = (1u << 28) -}; - class SharedMemory final : public Object { public: - explicit SharedMemory(KernelCore& kernel); + explicit SharedMemory(KernelCore& kernel, Core::DeviceMemory& device_memory); ~SharedMemory() override; - /** - * Creates a shared memory object. - * @param kernel The kernel instance to create a shared memory instance under. - * @param owner_process Process that created this shared memory object. - * @param size Size of the memory block. Must be page-aligned. - * @param permissions Permission restrictions applied to the process which created the block. - * @param other_permissions Permission restrictions applied to other processes mapping the - * block. - * @param address The address from which to map the Shared Memory. - * @param region If the address is 0, the shared memory will be allocated in this region of the - * linear heap. - * @param name Optional object name, used for debugging purposes. - */ - static std::shared_ptr Create(KernelCore& kernel, Process* owner_process, - u64 size, MemoryPermission permissions, - MemoryPermission other_permissions, - VAddr address = 0, - MemoryRegion region = MemoryRegion::BASE, - std::string name = "Unknown"); - - /** - * Creates a shared memory object from a block of memory managed by an HLE applet. - * @param kernel The kernel instance to create a shared memory instance under. - * @param heap_block Heap block of the HLE applet. - * @param offset The offset into the heap block that the SharedMemory will map. - * @param size Size of the memory block. Must be page-aligned. - * @param permissions Permission restrictions applied to the process which created the block. - * @param other_permissions Permission restrictions applied to other processes mapping the - * block. - * @param name Optional object name, used for debugging purposes. - */ - static std::shared_ptr CreateForApplet( - KernelCore& kernel, std::shared_ptr heap_block, std::size_t offset, - u64 size, MemoryPermission permissions, MemoryPermission other_permissions, - std::string name = "Unknown Applet"); + static std::shared_ptr Create( + KernelCore& kernel, Core::DeviceMemory& device_memory, Process* owner_process, + Memory::PageLinkedList&& page_list, Memory::MemoryPermission owner_permission, + Memory::MemoryPermission user_permission, PAddr physical_address, std::size_t size, + std::string name = "Unknown"); std::string GetTypeName() const override { return "SharedMemory"; } + std::string GetName() const override { return name; } @@ -83,71 +43,42 @@ public: return HANDLE_TYPE; } - /// Gets the size of the underlying memory block in bytes. - u64 GetSize() const { - return size; - } - - /** - * Converts the specified MemoryPermission into the equivalent VMAPermission. - * @param permission The MemoryPermission to convert. - */ - static VMAPermission ConvertPermissions(MemoryPermission permission); - /** * Maps a shared memory block to an address in the target process' address space - * @param target_process Process on which to map the memory block. + * @param target_process Process on which to map the memory block * @param address Address in system memory to map shared memory block to + * @param size Size of the shared memory block to map * @param permissions Memory block map permissions (specified by SVC field) - * @param other_permissions Memory block map other permissions (specified by SVC field) - */ - ResultCode Map(Process& target_process, VAddr address, MemoryPermission permissions, - MemoryPermission other_permissions); - - /** - * Unmaps a shared memory block from the specified address in system memory - * - * @param target_process Process from which to unmap the memory block. - * @param address Address in system memory where the shared memory block is mapped. - * @param unmap_size The amount of bytes to unmap from this shared memory instance. - * - * @return Result code of the unmap operation - * - * @pre The given size to unmap must be the same size as the amount of memory managed by - * the SharedMemory instance itself, otherwise ERR_INVALID_SIZE will be returned. */ - ResultCode Unmap(Process& target_process, VAddr address, u64 unmap_size); + ResultCode Map(Process& target_process, VAddr address, std::size_t size, + Memory::MemoryPermission permission); /** * Gets a pointer to the shared memory block * @param offset Offset from the start of the shared memory block to get pointer * @return A pointer to the shared memory block from the specified offset */ - u8* GetPointer(std::size_t offset = 0); + u8* GetPointer(std::size_t offset = 0) { + return device_memory.GetPointer(physical_address + offset); + } /** - * Gets a constant pointer to the shared memory block + * Gets a pointer to the shared memory block * @param offset Offset from the start of the shared memory block to get pointer - * @return A constant pointer to the shared memory block from the specified offset + * @return A pointer to the shared memory block from the specified offset */ - const u8* GetPointer(std::size_t offset = 0) const; + const u8* GetPointer(std::size_t offset = 0) const { + return device_memory.GetPointer(physical_address + offset); + } private: - /// Backing memory for this shared memory block. - std::shared_ptr backing_block; - /// Offset into the backing block for this shared memory. - std::size_t backing_block_offset = 0; - /// Size of the memory block. Page-aligned. - u64 size = 0; - /// Permission restrictions applied to the process which created the block. - MemoryPermission permissions{}; - /// Permission restrictions applied to other processes mapping the block. - MemoryPermission other_permissions{}; - /// Process that created this shared memory block. - Process* owner_process; - /// Address of shared memory block in the owner process if specified. - VAddr base_address = 0; - /// Name of shared memory object. + Core::DeviceMemory& device_memory; + Process* owner_process{}; + Memory::PageLinkedList page_list; + Memory::MemoryPermission owner_permission{}; + Memory::MemoryPermission user_permission{}; + PAddr physical_address{}; + std::size_t size{}; std::string name; }; -- cgit v1.2.3