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Merge pull request #7762 from bunnei/un-map-improve 

Kernel Memory Updates (Part 4): Improve Un/MapPages, and more.
This commit is contained in:
bunnei 2022-01-26 17:54:20 -08:00 committed by GitHub
parent 40050c1188 e791da9791
commit adcac857f8
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 108 additions and 111 deletions
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190
src/core/hle/kernel/k_page_table.cpp
View File

@ -276,22 +276,23 @@ ResultCode KPageTable::InitializeForProcess(FileSys::ProgramAddressSpaceType as_
ResultCode KPageTable::MapProcessCode(VAddr addr, std::size_t num_pages, KMemoryState state,
KMemoryPermission perm) {
std::lock_guard lock{page_table_lock};
const u64 size{num_pages * PageSize};
if (!CanContain(addr, size, state)) {
return ResultInvalidCurrentMemory;
}
// Validate the mapping request.
R_UNLESS(this->CanContain(addr, size, state), ResultInvalidCurrentMemory);
if (IsRegionMapped(addr, size)) {
return ResultInvalidCurrentMemory;
}
// Lock the table.
std::lock_guard lock{page_table_lock};
// Verify that the destination memory is unmapped.
R_TRY(this->CheckMemoryState(addr, size, KMemoryState::All, KMemoryState::Free,
KMemoryPermission::None, KMemoryPermission::None,
KMemoryAttribute::None, KMemoryAttribute::None));
KPageLinkedList page_linked_list;
CASCADE_CODE(system.Kernel().MemoryManager().Allocate(page_linked_list, num_pages, memory_pool,
R_TRY(system.Kernel().MemoryManager().Allocate(page_linked_list, num_pages, memory_pool,
allocation_option));
CASCADE_CODE(Operate(addr, num_pages, page_linked_list, OperationType::MapGroup));
R_TRY(Operate(addr, num_pages, page_linked_list, OperationType::MapGroup));
block_manager->Update(addr, num_pages, state, perm);
@ -395,39 +396,12 @@ ResultCode KPageTable::UnmapProcessMemory(VAddr dst_addr, std::size_t size,
return ResultSuccess;
}
void KPageTable::MapPhysicalMemory(KPageLinkedList& page_linked_list, VAddr start, VAddr end) {
auto node{page_linked_list.Nodes().begin()};
PAddr map_addr{node->GetAddress()};
std::size_t src_num_pages{node->GetNumPages()};
block_manager->IterateForRange(start, end, [&](const KMemoryInfo& info) {
if (info.state != KMemoryState::Free) {
return;
}
std::size_t dst_num_pages{GetSizeInRange(info, start, end) / PageSize};
VAddr dst_addr{GetAddressInRange(info, start)};
while (dst_num_pages) {
if (!src_num_pages) {
node = std::next(node);
map_addr = node->GetAddress();
src_num_pages = node->GetNumPages();
}
const std::size_t num_pages{std::min(src_num_pages, dst_num_pages)};
Operate(dst_addr, num_pages, KMemoryPermission::UserReadWrite, OperationType::Map,
map_addr);
dst_addr += num_pages * PageSize;
map_addr += num_pages * PageSize;
src_num_pages -= num_pages;
dst_num_pages -= num_pages;
}
});
}
ResultCode KPageTable::MapPhysicalMemory(VAddr addr, std::size_t size) {
// Lock the physical memory lock.
std::lock_guard phys_lk(map_physical_memory_lock);
// Lock the table.
std::lock_guard lock{page_table_lock};
std::size_t mapped_size{};
@ -463,7 +437,35 @@ ResultCode KPageTable::MapPhysicalMemory(VAddr addr, std::size_t size) {
// We succeeded, so commit the memory reservation.
memory_reservation.Commit();
MapPhysicalMemory(page_linked_list, addr, end_addr);
// Map the memory.
auto node{page_linked_list.Nodes().begin()};
PAddr map_addr{node->GetAddress()};
std::size_t src_num_pages{node->GetNumPages()};
block_manager->IterateForRange(addr, end_addr, [&](const KMemoryInfo& info) {
if (info.state != KMemoryState::Free) {
return;
}
std::size_t dst_num_pages{GetSizeInRange(info, addr, end_addr) / PageSize};
VAddr dst_addr{GetAddressInRange(info, addr)};
while (dst_num_pages) {
if (!src_num_pages) {
node = std::next(node);
map_addr = node->GetAddress();
src_num_pages = node->GetNumPages();
}
const std::size_t num_pages{std::min(src_num_pages, dst_num_pages)};
Operate(dst_addr, num_pages, KMemoryPermission::UserReadWrite, OperationType::Map,
map_addr);
dst_addr += num_pages * PageSize;
map_addr += num_pages * PageSize;
src_num_pages -= num_pages;
dst_num_pages -= num_pages;
}
});
mapped_physical_memory_size += remaining_size;
@ -503,23 +505,8 @@ ResultCode KPageTable::UnmapPhysicalMemory(VAddr addr, std::size_t size) {
return ResultSuccess;
}
CASCADE_CODE(UnmapMemory(addr, size));
auto process{system.Kernel().CurrentProcess()};
process->GetResourceLimit()->Release(LimitableResource::PhysicalMemory, mapped_size);
mapped_physical_memory_size -= mapped_size;
return ResultSuccess;
}
ResultCode KPageTable::UnmapMemory(VAddr addr, std::size_t size) {
std::lock_guard lock{page_table_lock};
const VAddr end_addr{addr + size};
ResultCode result{ResultSuccess};
KPageLinkedList page_linked_list;
// Unmap each region within the range
KPageLinkedList page_linked_list;
block_manager->IterateForRange(addr, end_addr, [&](const KMemoryInfo& info) {
if (info.state == KMemoryState::Normal) {
const std::size_t block_size{GetSizeInRange(info, addr, end_addr)};
@ -535,7 +522,6 @@ ResultCode KPageTable::UnmapMemory(VAddr addr, std::size_t size) {
}
}
});
if (result.IsError()) {
return result;
}
@ -546,10 +532,14 @@ ResultCode KPageTable::UnmapMemory(VAddr addr, std::size_t size) {
block_manager->Update(addr, num_pages, KMemoryState::Free);
auto process{system.Kernel().CurrentProcess()};
process->GetResourceLimit()->Release(LimitableResource::PhysicalMemory, mapped_size);
mapped_physical_memory_size -= mapped_size;
return ResultSuccess;
}
ResultCode KPageTable::Map(VAddr dst_addr, VAddr src_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};
KMemoryState src_state{};
@ -588,7 +578,7 @@ ResultCode KPageTable::Map(VAddr dst_addr, VAddr src_addr, std::size_t size) {
return ResultSuccess;
}
ResultCode KPageTable::Unmap(VAddr dst_addr, VAddr src_addr, std::size_t size) {
ResultCode KPageTable::UnmapMemory(VAddr dst_addr, VAddr src_addr, std::size_t size) {
std::lock_guard lock{page_table_lock};
KMemoryState src_state{};
@ -652,24 +642,26 @@ ResultCode KPageTable::MapPages(VAddr addr, const KPageLinkedList& page_linked_l
return ResultSuccess;
}
ResultCode KPageTable::MapPages(VAddr addr, KPageLinkedList& page_linked_list, KMemoryState state,
KMemoryPermission perm) {
std::lock_guard lock{page_table_lock};
ResultCode KPageTable::MapPages(VAddr address, KPageLinkedList& page_linked_list,
KMemoryState state, KMemoryPermission perm) {
// Check that the map is in range.
const std::size_t num_pages{page_linked_list.GetNumPages()};
const std::size_t size{num_pages * PageSize};
R_UNLESS(this->CanContain(address, size, state), ResultInvalidCurrentMemory);
if (!CanContain(addr, size, state)) {
return ResultInvalidCurrentMemory;
}
// Lock the table.
std::lock_guard lock{page_table_lock};
if (IsRegionMapped(addr, num_pages * PageSize)) {
return ResultInvalidCurrentMemory;
}
// Check the memory state.
R_TRY(this->CheckMemoryState(address, size, KMemoryState::All, KMemoryState::Free,
KMemoryPermission::None, KMemoryPermission::None,
KMemoryAttribute::None, KMemoryAttribute::None));
CASCADE_CODE(MapPages(addr, page_linked_list, perm));
// Map the pages.
R_TRY(MapPages(address, page_linked_list, perm));
block_manager->Update(addr, num_pages, state, perm);
// Update the blocks.
block_manager->Update(address, num_pages, state, perm);
return ResultSuccess;
}
@ -693,21 +685,23 @@ ResultCode KPageTable::UnmapPages(VAddr addr, const KPageLinkedList& page_linked
ResultCode KPageTable::UnmapPages(VAddr addr, KPageLinkedList& page_linked_list,
KMemoryState state) {
std::lock_guard lock{page_table_lock};
// Check that the unmap is in range.
const std::size_t num_pages{page_linked_list.GetNumPages()};
const std::size_t size{num_pages * PageSize};
R_UNLESS(this->Contains(addr, size), ResultInvalidCurrentMemory);
if (!CanContain(addr, size, state)) {
return ResultInvalidCurrentMemory;
}
// Lock the table.
std::lock_guard lock{page_table_lock};
if (IsRegionMapped(addr, num_pages * PageSize)) {
return ResultInvalidCurrentMemory;
}
// Check the memory state.
R_TRY(this->CheckMemoryState(addr, size, KMemoryState::All, state, KMemoryPermission::None,
KMemoryPermission::None, KMemoryAttribute::All,
KMemoryAttribute::None));
CASCADE_CODE(UnmapPages(addr, page_linked_list));
// Perform the unmap.
R_TRY(UnmapPages(addr, page_linked_list));
// Update the blocks.
block_manager->Update(addr, num_pages, state, KMemoryPermission::None);
return ResultSuccess;
@ -765,7 +759,6 @@ ResultCode KPageTable::SetProcessMemoryPermission(VAddr addr, std::size_t size,
// Ensure cache coherency, if we're setting pages as executable.
if (is_x) {
// Memory execution state is changing, invalidate CPU cache range
system.InvalidateCpuInstructionCacheRange(addr, size);
}
@ -793,11 +786,11 @@ ResultCode KPageTable::ReserveTransferMemory(VAddr addr, std::size_t size, KMemo
KMemoryState state{};
KMemoryAttribute attribute{};
CASCADE_CODE(CheckMemoryState(
&state, nullptr, &attribute, nullptr, addr, size,
R_TRY(CheckMemoryState(&state, nullptr, &attribute, nullptr, addr, size,
KMemoryState::FlagCanTransfer | KMemoryState::FlagReferenceCounted,
KMemoryState::FlagCanTransfer | KMemoryState::FlagReferenceCounted, KMemoryPermission::All,
KMemoryPermission::UserReadWrite, KMemoryAttribute::Mask, KMemoryAttribute::None,
KMemoryState::FlagCanTransfer | KMemoryState::FlagReferenceCounted,
KMemoryPermission::All, KMemoryPermission::UserReadWrite,
KMemoryAttribute::Mask, KMemoryAttribute::None,
KMemoryAttribute::IpcAndDeviceMapped));
block_manager->Update(addr, size / PageSize, state, perm, attribute | KMemoryAttribute::Locked);
@ -810,8 +803,7 @@ ResultCode KPageTable::ResetTransferMemory(VAddr addr, std::size_t size) {
KMemoryState state{};
CASCADE_CODE(
CheckMemoryState(&state, nullptr, nullptr, nullptr, addr, size,
R_TRY(CheckMemoryState(&state, nullptr, nullptr, nullptr, addr, size,
KMemoryState::FlagCanTransfer | KMemoryState::FlagReferenceCounted,
KMemoryState::FlagCanTransfer | KMemoryState::FlagReferenceCounted,
KMemoryPermission::None, KMemoryPermission::None, KMemoryAttribute::Mask,
@ -871,8 +863,9 @@ ResultCode KPageTable::SetMemoryAttribute(VAddr addr, std::size_t size, u32 mask
AttributeTestMask, KMemoryAttribute::None, ~AttributeTestMask));
// Determine the new attribute.
const auto new_attr = ((old_attr & static_cast<KMemoryAttribute>(~mask)) |
static_cast<KMemoryAttribute>(attr & mask));
const KMemoryAttribute new_attr =
static_cast<KMemoryAttribute>(((old_attr & static_cast<KMemoryAttribute>(~mask)) |
static_cast<KMemoryAttribute>(attr & mask)));
// Perform operation.
this->Operate(addr, num_pages, old_perm, OperationType::ChangePermissionsAndRefresh);
@ -896,6 +889,9 @@ 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);
// Try to perform a reduction in heap, instead of an extension.
VAddr cur_address{};
std::size_t allocation_size{};
@ -1025,12 +1021,12 @@ ResultVal<VAddr> KPageTable::AllocateAndMapMemory(std::size_t needed_num_pages,
}
if (is_map_only) {
CASCADE_CODE(Operate(addr, needed_num_pages, perm, OperationType::Map, map_addr));
R_TRY(Operate(addr, needed_num_pages, perm, OperationType::Map, map_addr));
} else {
KPageLinkedList page_group;
CASCADE_CODE(system.Kernel().MemoryManager().Allocate(page_group, needed_num_pages,
memory_pool, allocation_option));
CASCADE_CODE(Operate(addr, needed_num_pages, page_group, OperationType::MapGroup));
R_TRY(system.Kernel().MemoryManager().Allocate(page_group, needed_num_pages, memory_pool,
allocation_option));
R_TRY(Operate(addr, needed_num_pages, page_group, OperationType::MapGroup));
}
block_manager->Update(addr, needed_num_pages, state, perm);
@ -1186,7 +1182,7 @@ VAddr KPageTable::AllocateVirtualMemory(VAddr start, std::size_t region_num_page
ResultCode KPageTable::Operate(VAddr addr, std::size_t num_pages, const KPageLinkedList& page_group,
OperationType operation) {
std::lock_guard lock{page_table_lock};
ASSERT(this->IsLockedByCurrentThread());
ASSERT(Common::IsAligned(addr, PageSize));
ASSERT(num_pages > 0);
@ -1211,7 +1207,7 @@ ResultCode KPageTable::Operate(VAddr addr, std::size_t num_pages, const KPageLin
ResultCode KPageTable::Operate(VAddr addr, std::size_t num_pages, KMemoryPermission perm,
OperationType operation, PAddr map_addr) {
std::lock_guard lock{page_table_lock};
ASSERT(this->IsLockedByCurrentThread());
ASSERT(num_pages > 0);
ASSERT(Common::IsAligned(addr, PageSize));

11
src/core/hle/kernel/k_page_table.h
View File

@ -37,9 +37,8 @@ public:
VAddr src_addr);
ResultCode MapPhysicalMemory(VAddr addr, std::size_t size);
ResultCode UnmapPhysicalMemory(VAddr addr, std::size_t size);
ResultCode UnmapMemory(VAddr addr, std::size_t size);
ResultCode Map(VAddr dst_addr, VAddr src_addr, std::size_t size);
ResultCode Unmap(VAddr dst_addr, VAddr src_addr, std::size_t size);
ResultCode MapMemory(VAddr dst_addr, VAddr src_addr, std::size_t size);
ResultCode UnmapMemory(VAddr dst_addr, VAddr src_addr, std::size_t size);
ResultCode MapPages(VAddr addr, KPageLinkedList& page_linked_list, KMemoryState state,
KMemoryPermission perm);
ResultCode UnmapPages(VAddr addr, KPageLinkedList& page_linked_list, KMemoryState state);
@ -88,7 +87,6 @@ private:
ResultCode MapPages(VAddr addr, const KPageLinkedList& page_linked_list,
KMemoryPermission perm);
ResultCode UnmapPages(VAddr addr, const KPageLinkedList& page_linked_list);
void MapPhysicalMemory(KPageLinkedList& page_linked_list, VAddr start, VAddr end);
bool IsRegionMapped(VAddr address, u64 size);
bool IsRegionContiguous(VAddr addr, u64 size) const;
void AddRegionToPages(VAddr start, std::size_t num_pages, KPageLinkedList& page_linked_list);
@ -148,6 +146,7 @@ private:
}
std::recursive_mutex page_table_lock;
std::mutex map_physical_memory_lock;
std::unique_ptr<KMemoryBlockManager> block_manager;
public:
@ -249,7 +248,9 @@ public:
return !IsOutsideASLRRegion(address, size);
}
constexpr PAddr GetPhysicalAddr(VAddr addr) {
return page_table_impl.backing_addr[addr >> PageBits] + addr;
const auto backing_addr = page_table_impl.backing_addr[addr >> PageBits];
ASSERT(backing_addr);
return backing_addr + addr;
}
constexpr bool Contains(VAddr addr) const {
return address_space_start <= addr && addr <= address_space_end - 1;

4
src/core/hle/kernel/svc.cpp
View File

@ -230,7 +230,7 @@ static ResultCode MapMemory(Core::System& system, VAddr dst_addr, VAddr src_addr
return result;
}
return page_table.Map(dst_addr, src_addr, size);
return page_table.MapMemory(dst_addr, src_addr, size);
}
static ResultCode MapMemory32(Core::System& system, u32 dst_addr, u32 src_addr, u32 size) {
@ -249,7 +249,7 @@ static ResultCode UnmapMemory(Core::System& system, VAddr dst_addr, VAddr src_ad
return result;
}
return page_table.Unmap(dst_addr, src_addr, size);
return page_table.UnmapMemory(dst_addr, src_addr, size);
}
static ResultCode UnmapMemory32(Core::System& system, u32 dst_addr, u32 src_addr, u32 size) {