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hle: kernel: KPageTable: Migrate locks to KScopedLightLock.

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- More accurately reflects real kernel behavior by using guest locks.
This commit is contained in:
bunnei 2022-02-01 19:34:24 -08:00
parent 50e9ba34b4
commit 995e27e9b7
2 changed files with 46 additions and 34 deletions
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65
src/core/hle/kernel/k_page_table.cpp
View File

@ -61,7 +61,8 @@ constexpr std::size_t GetSizeInRange(const KMemoryInfo& info, VAddr start, VAddr
} // namespace
KPageTable::KPageTable(Core::System& system_) : system{system_} {}
KPageTable::KPageTable(Core::System& system_)
: general_lock{system_.Kernel()}, map_physical_memory_lock{system_.Kernel()}, system{system_} {}
ResultCode KPageTable::InitializeForProcess(FileSys::ProgramAddressSpaceType as_type,
bool enable_aslr, VAddr code_addr,
@ -282,7 +283,7 @@ ResultCode KPageTable::MapProcessCode(VAddr addr, std::size_t num_pages, KMemory
R_UNLESS(this->CanContain(addr, size, state), ResultInvalidCurrentMemory);
// Lock the table.
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
// Verify that the destination memory is unmapped.
R_TRY(this->CheckMemoryState(addr, size, KMemoryState::All, KMemoryState::Free,
@ -300,7 +301,7 @@ ResultCode KPageTable::MapProcessCode(VAddr addr, std::size_t num_pages, KMemory
}
ResultCode KPageTable::MapCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size) {
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
const std::size_t num_pages{size / PageSize};
@ -337,7 +338,7 @@ ResultCode KPageTable::MapCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t
}
ResultCode KPageTable::UnmapCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size) {
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
if (!size) {
return ResultSuccess;
@ -371,7 +372,7 @@ ResultCode KPageTable::UnmapCodeMemory(VAddr dst_addr, VAddr src_addr, std::size
ResultCode KPageTable::UnmapProcessMemory(VAddr dst_addr, std::size_t size,
KPageTable& src_page_table, VAddr src_addr) {
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
const std::size_t num_pages{size / PageSize};
@ -399,10 +400,10 @@ ResultCode KPageTable::UnmapProcessMemory(VAddr dst_addr, std::size_t size,
ResultCode KPageTable::MapPhysicalMemory(VAddr addr, std::size_t size) {
// Lock the physical memory lock.
std::lock_guard phys_lk(map_physical_memory_lock);
KScopedLightLock map_phys_mem_lk(map_physical_memory_lock);
// Lock the table.
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
std::size_t mapped_size{};
const VAddr end_addr{addr + size};
@ -478,7 +479,11 @@ ResultCode KPageTable::MapPhysicalMemory(VAddr addr, std::size_t size) {
}
ResultCode KPageTable::UnmapPhysicalMemory(VAddr addr, std::size_t size) {
std::lock_guard lock{page_table_lock};
// Lock the physical memory lock.
KScopedLightLock map_phys_mem_lk(map_physical_memory_lock);
// Lock the table.
KScopedLightLock lk(general_lock);
const VAddr end_addr{addr + size};
ResultCode result{ResultSuccess};
@ -540,7 +545,7 @@ ResultCode KPageTable::UnmapPhysicalMemory(VAddr addr, std::size_t size) {
}
ResultCode KPageTable::MapMemory(VAddr dst_addr, VAddr src_addr, std::size_t size) {
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
KMemoryState src_state{};
CASCADE_CODE(CheckMemoryState(
@ -579,7 +584,7 @@ ResultCode KPageTable::MapMemory(VAddr dst_addr, VAddr src_addr, std::size_t siz
}
ResultCode KPageTable::UnmapMemory(VAddr dst_addr, VAddr src_addr, std::size_t size) {
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
KMemoryState src_state{};
CASCADE_CODE(CheckMemoryState(
@ -622,6 +627,8 @@ ResultCode KPageTable::UnmapMemory(VAddr dst_addr, VAddr src_addr, std::size_t s
ResultCode KPageTable::MapPages(VAddr addr, const KPageLinkedList& page_linked_list,
KMemoryPermission perm) {
ASSERT(this->IsLockedByCurrentThread());
VAddr cur_addr{addr};
for (const auto& node : page_linked_list.Nodes()) {
@ -650,7 +657,7 @@ ResultCode KPageTable::MapPages(VAddr address, KPageLinkedList& page_linked_list
R_UNLESS(this->CanContain(address, size, state), ResultInvalidCurrentMemory);
// Lock the table.
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
// Check the memory state.
R_TRY(this->CheckMemoryState(address, size, KMemoryState::All, KMemoryState::Free,
@ -667,6 +674,8 @@ ResultCode KPageTable::MapPages(VAddr address, KPageLinkedList& page_linked_list
}
ResultCode KPageTable::UnmapPages(VAddr addr, const KPageLinkedList& page_linked_list) {
ASSERT(this->IsLockedByCurrentThread());
VAddr cur_addr{addr};
for (const auto& node : page_linked_list.Nodes()) {
@ -691,7 +700,7 @@ ResultCode KPageTable::UnmapPages(VAddr addr, KPageLinkedList& page_linked_list,
R_UNLESS(this->Contains(addr, size), ResultInvalidCurrentMemory);
// Lock the table.
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
// Check the memory state.
R_TRY(this->CheckMemoryState(addr, size, KMemoryState::All, state, KMemoryPermission::None,
@ -712,7 +721,7 @@ ResultCode KPageTable::SetProcessMemoryPermission(VAddr addr, std::size_t size,
const size_t num_pages = size / PageSize;
// Lock the table.
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
// Verify we can change the memory permission.
KMemoryState old_state;
@ -766,7 +775,7 @@ ResultCode KPageTable::SetProcessMemoryPermission(VAddr addr, std::size_t size,
}
KMemoryInfo KPageTable::QueryInfoImpl(VAddr addr) {
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
return block_manager->FindBlock(addr).GetMemoryInfo();
}
@ -781,7 +790,7 @@ KMemoryInfo KPageTable::QueryInfo(VAddr addr) {
}
ResultCode KPageTable::ReserveTransferMemory(VAddr addr, std::size_t size, KMemoryPermission perm) {
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
KMemoryState state{};
KMemoryAttribute attribute{};
@ -799,7 +808,7 @@ ResultCode KPageTable::ReserveTransferMemory(VAddr addr, std::size_t size, KMemo
}
ResultCode KPageTable::ResetTransferMemory(VAddr addr, std::size_t size) {
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
KMemoryState state{};
@ -818,7 +827,7 @@ ResultCode KPageTable::SetMemoryPermission(VAddr addr, std::size_t size,
const size_t num_pages = size / PageSize;
// Lock the table.
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
// Verify we can change the memory permission.
KMemoryState old_state;
@ -847,7 +856,7 @@ ResultCode KPageTable::SetMemoryAttribute(VAddr addr, std::size_t size, u32 mask
KMemoryAttribute::SetMask);
// Lock the table.
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
// Verify we can change the memory attribute.
KMemoryState old_state;
@ -878,7 +887,7 @@ ResultCode KPageTable::SetMemoryAttribute(VAddr addr, std::size_t size, u32 mask
ResultCode KPageTable::SetMaxHeapSize(std::size_t size) {
// Lock the table.
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
// Only process page tables are allowed to set heap size.
ASSERT(!this->IsKernel());
@ -889,15 +898,15 @@ ResultCode KPageTable::SetMaxHeapSize(std::size_t size) {
}
ResultCode KPageTable::SetHeapSize(VAddr* out, std::size_t size) {
// Lock the physical memory lock.
std::lock_guard phys_lk(map_physical_memory_lock);
// Lock the physical memory mutex.
KScopedLightLock map_phys_mem_lk(map_physical_memory_lock);
// Try to perform a reduction in heap, instead of an extension.
VAddr cur_address{};
std::size_t allocation_size{};
{
// Lock the table.
std::lock_guard lk(page_table_lock);
KScopedLightLock lk(general_lock);
// Validate that setting heap size is possible at all.
R_UNLESS(!is_kernel, ResultOutOfMemory);
@ -962,7 +971,7 @@ ResultCode KPageTable::SetHeapSize(VAddr* out, std::size_t size) {
// Map the pages.
{
// Lock the table.
std::lock_guard lk(page_table_lock);
KScopedLightLock lk(general_lock);
// Ensure that the heap hasn't changed since we began executing.
ASSERT(cur_address == current_heap_end);
@ -1004,7 +1013,7 @@ ResultVal<VAddr> KPageTable::AllocateAndMapMemory(std::size_t needed_num_pages,
bool is_map_only, VAddr region_start,
std::size_t region_num_pages, KMemoryState state,
KMemoryPermission perm, PAddr map_addr) {
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
if (!CanContain(region_start, region_num_pages * PageSize, state)) {
return ResultInvalidCurrentMemory;
@ -1035,7 +1044,7 @@ ResultVal<VAddr> KPageTable::AllocateAndMapMemory(std::size_t needed_num_pages,
}
ResultCode KPageTable::LockForDeviceAddressSpace(VAddr addr, std::size_t size) {
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
KMemoryPermission perm{};
if (const ResultCode result{CheckMemoryState(
@ -1058,7 +1067,7 @@ ResultCode KPageTable::LockForDeviceAddressSpace(VAddr addr, std::size_t size) {
}
ResultCode KPageTable::UnlockForDeviceAddressSpace(VAddr addr, std::size_t size) {
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
KMemoryPermission perm{};
if (const ResultCode result{CheckMemoryState(
@ -1081,7 +1090,7 @@ ResultCode KPageTable::UnlockForDeviceAddressSpace(VAddr addr, std::size_t size)
}
ResultCode KPageTable::LockForCodeMemory(VAddr addr, std::size_t size) {
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
KMemoryPermission new_perm = KMemoryPermission::NotMapped | KMemoryPermission::KernelReadWrite;
@ -1108,7 +1117,7 @@ ResultCode KPageTable::LockForCodeMemory(VAddr addr, std::size_t size) {
}
ResultCode KPageTable::UnlockForCodeMemory(VAddr addr, std::size_t size) {
std::lock_guard lock{page_table_lock};
KScopedLightLock lk(general_lock);
KMemoryPermission new_perm = KMemoryPermission::UserReadWrite;

15
src/core/hle/kernel/k_page_table.h
View File

@ -5,11 +5,11 @@
#pragma once
#include <memory>
#include <mutex>
#include "common/common_types.h"
#include "common/page_table.h"
#include "core/file_sys/program_metadata.h"
#include "core/hle/kernel/k_light_lock.h"
#include "core/hle/kernel/k_memory_block.h"
#include "core/hle/kernel/k_memory_manager.h"
#include "core/hle/result.h"
@ -142,11 +142,12 @@ private:
}
bool IsLockedByCurrentThread() const {
return true;
return general_lock.IsLockedByCurrentThread();
}
std::recursive_mutex page_table_lock;
std::mutex map_physical_memory_lock;
mutable KLightLock general_lock;
mutable KLightLock map_physical_memory_lock;
std::unique_ptr<KMemoryBlockManager> block_manager;
public:
@ -205,7 +206,7 @@ public:
return alias_code_region_end - alias_code_region_start;
}
size_t GetNormalMemorySize() {
std::lock_guard lk(page_table_lock);
KScopedLightLock lk(general_lock);
return GetHeapSize() + mapped_physical_memory_size;
}
constexpr std::size_t GetAddressSpaceWidth() const {
@ -247,7 +248,9 @@ public:
constexpr bool IsInsideASLRRegion(VAddr address, std::size_t size) const {
return !IsOutsideASLRRegion(address, size);
}
constexpr PAddr GetPhysicalAddr(VAddr addr) {
PAddr GetPhysicalAddr(VAddr addr) {
ASSERT(IsLockedByCurrentThread());
const auto backing_addr = page_table_impl.backing_addr[addr >> PageBits];
ASSERT(backing_addr);
return backing_addr + addr;