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Kernel/Memory: Give each Process its own page table.

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The loader is in charge of setting the newly created process's page table as the main one during the loading process.
This commit is contained in:
Subv 2017-07-21 21:17:57 -05:00
parent 5d0a1e7efd
commit 6d2734a074
9 changed files with 93 additions and 87 deletions
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13
src/core/hle/kernel/vm_manager.cpp
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@ -56,6 +56,10 @@ void VMManager::Reset() {
initial_vma.size = MAX_ADDRESS;
vma_map.emplace(initial_vma.base, initial_vma);
page_table.pointers.fill(nullptr);
page_table.attributes.fill(Memory::PageType::Unmapped);
page_table.cached_res_count.fill(0);
UpdatePageTableForVMA(initial_vma);
}
@ -328,16 +332,17 @@ VMManager::VMAIter VMManager::MergeAdjacent(VMAIter iter) {
void VMManager::UpdatePageTableForVMA(const VirtualMemoryArea& vma) {
switch (vma.type) {
case VMAType::Free:
Memory::UnmapRegion(vma.base, vma.size);
Memory::UnmapRegion(page_table, vma.base, vma.size);
break;
case VMAType::AllocatedMemoryBlock:
Memory::MapMemoryRegion(vma.base, vma.size, vma.backing_block->data() + vma.offset);
Memory::MapMemoryRegion(page_table, vma.base, vma.size,
vma.backing_block->data() + vma.offset);
break;
case VMAType::BackingMemory:
Memory::MapMemoryRegion(vma.base, vma.size, vma.backing_memory);
Memory::MapMemoryRegion(page_table, vma.base, vma.size, vma.backing_memory);
break;
case VMAType::MMIO:
Memory::MapIoRegion(vma.base, vma.size, vma.mmio_handler);
Memory::MapIoRegion(page_table, vma.base, vma.size, vma.mmio_handler);
break;
}
}

6
src/core/hle/kernel/vm_manager.h
View file

@ -9,6 +9,7 @@
#include <vector>
#include "common/common_types.h"
#include "core/hle/result.h"
#include "core/memory.h"
#include "core/mmio.h"
namespace Kernel {
@ -102,7 +103,6 @@ struct VirtualMemoryArea {
* - http://duartes.org/gustavo/blog/post/page-cache-the-affair-between-memory-and-files/
*/
class VMManager final {
// TODO(yuriks): Make page tables switchable to support multiple VMManagers
public:
/**
* The maximum amount of address space managed by the kernel. Addresses above this are never
@ -184,6 +184,10 @@ public:
/// Dumps the address space layout to the log, for debugging
void LogLayout(Log::Level log_level) const;
/// Each VMManager has its own page table, which is set as the main one when the owning process
/// is scheduled.
Memory::PageTable page_table;
private:
using VMAIter = decltype(vma_map)::iterator;