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VMManager: change MapMemoryBlockToBase to use raw backing memory 

And let ServerSession.MappedBufferContext hold the mapped memory
This commit is contained in:
Weiyi Wang 2018-11-08 14:05:54 -05:00
parent 0b8d2ecabe
commit 7f9873d7ec
4 changed files with 27 additions and 24 deletions
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32
src/core/hle/kernel/ipc.cpp
View File

@ -181,29 +181,31 @@ ResultCode TranslateCommandBuffer(SharedPtr<Thread> src_thread, SharedPtr<Thread
// TODO(Subv): Perform permission checks.
// Reserve a page of memory before the mapped buffer
auto reserve_buffer = std::make_shared<std::vector<u8>>(Memory::PAGE_SIZE);
dst_process->vm_manager.MapMemoryBlockToBase(
Memory::IPC_MAPPING_VADDR, Memory::IPC_MAPPING_SIZE, reserve_buffer, 0,
static_cast<u32>(reserve_buffer->size()), Kernel::MemoryState::Reserved);
auto reserve_buffer = std::make_unique<u8[]>(Memory::PAGE_SIZE);
dst_process->vm_manager.MapBackingMemoryToBase(
Memory::IPC_MAPPING_VADDR, Memory::IPC_MAPPING_SIZE, reserve_buffer.get(),
Memory::PAGE_SIZE, Kernel::MemoryState::Reserved);
auto buffer = std::make_shared<std::vector<u8>>(num_pages * Memory::PAGE_SIZE);
Memory::ReadBlock(*src_process, source_address, buffer->data() + page_offset, size);
auto buffer = std::make_unique<u8[]>(num_pages * Memory::PAGE_SIZE);
Memory::ReadBlock(*src_process, source_address, buffer.get() + page_offset, size);
// Map the page(s) into the target process' address space.
target_address = dst_process->vm_manager
.MapMemoryBlockToBase(
Memory::IPC_MAPPING_VADDR, Memory::IPC_MAPPING_SIZE, buffer, 0,
static_cast<u32>(buffer->size()), Kernel::MemoryState::Shared)
.Unwrap();
target_address =
dst_process->vm_manager
.MapBackingMemoryToBase(Memory::IPC_MAPPING_VADDR, Memory::IPC_MAPPING_SIZE,
buffer.get(), num_pages * Memory::PAGE_SIZE,
Kernel::MemoryState::Shared)
.Unwrap();
cmd_buf[i++] = target_address + page_offset;
// Reserve a page of memory after the mapped buffer
dst_process->vm_manager.MapMemoryBlockToBase(
Memory::IPC_MAPPING_VADDR, Memory::IPC_MAPPING_SIZE, reserve_buffer, 0,
static_cast<u32>(reserve_buffer->size()), Kernel::MemoryState::Reserved);
dst_process->vm_manager.MapBackingMemoryToBase(
Memory::IPC_MAPPING_VADDR, Memory::IPC_MAPPING_SIZE, reserve_buffer.get(),
Memory::PAGE_SIZE, Kernel::MemoryState::Reserved);
mapped_buffer_context.push_back({permissions, size, source_address, target_address});
mapped_buffer_context.push_back({permissions, size, source_address, target_address,
std::move(buffer), std::move(reserve_buffer)});
break;
}

4
src/core/hle/kernel/ipc.h
View File

@ -4,6 +4,7 @@
#pragma once
#include <memory>
#include <vector>
#include "common/common_types.h"
#include "core/hle/ipc.h"
@ -16,6 +17,9 @@ struct MappedBufferContext {
u32 size;
VAddr source_address;
VAddr target_address;
std::unique_ptr<u8[]> buffer;
std::unique_ptr<u8[]> reserve_buffer;
};
/// Performs IPC command buffer translation from one process to another.

7
src/core/hle/kernel/vm_manager.cpp
View File

@ -93,9 +93,8 @@ ResultVal<VMManager::VMAHandle> VMManager::MapMemoryBlock(VAddr target,
return MakeResult<VMAHandle>(MergeAdjacent(vma_handle));
}
ResultVal<VAddr> VMManager::MapMemoryBlockToBase(VAddr base, u32 region_size,
std::shared_ptr<std::vector<u8>> block,
std::size_t offset, u32 size, MemoryState state) {
ResultVal<VAddr> VMManager::MapBackingMemoryToBase(VAddr base, u32 region_size, u8* memory,
u32 size, MemoryState state) {
// Find the first Free VMA.
VMAHandle vma_handle = std::find_if(vma_map.begin(), vma_map.end(), [&](const auto& vma) {
@ -115,7 +114,7 @@ ResultVal<VAddr> VMManager::MapMemoryBlockToBase(VAddr base, u32 region_size,
ErrorSummary::OutOfResource, ErrorLevel::Permanent);
}
auto result = MapMemoryBlock(target, block, offset, size, state);
auto result = MapBackingMemory(target, memory, size, state);
if (result.Failed())
return result.Code();

8
src/core/hle/kernel/vm_manager.h
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@ -150,15 +150,13 @@ public:
*
* @param base The base address to start the mapping at.
* @param region_size The max size of the region from where we'll try to find an address.
* @param block The block to be mapped.
* @param offset Offset into `block` to map from.
* @param memory The memory to be mapped.
* @param size Size of the mapping.
* @param state MemoryState tag to attach to the VMA.
* @returns The address at which the memory was mapped.
*/
ResultVal<VAddr> MapMemoryBlockToBase(VAddr base, u32 region_size,
std::shared_ptr<std::vector<u8>> block,
std::size_t offset, u32 size, MemoryState state);
ResultVal<VAddr> MapBackingMemoryToBase(VAddr base, u32 region_size, u8* memory, u32 size,
MemoryState state);
/**
* Maps an unmanaged host memory pointer at a given address.
*