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k_page_table: implement PermissionLocked

master
Liam 2023-10-11 11:39:09 +07:00
parent 60a1c6b95b
commit 0441853d0f
6 changed files with 128 additions and 26 deletions
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13
src/core/hle/kernel/k_memory_block.h
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@ -192,7 +192,7 @@ enum class KMemoryAttribute : u8 {
Uncached = static_cast<u8>(Svc::MemoryAttribute::Uncached),
PermissionLocked = static_cast<u8>(Svc::MemoryAttribute::PermissionLocked),
SetMask = Uncached,
SetMask = Uncached | PermissionLocked,
};
DECLARE_ENUM_FLAG_OPERATORS(KMemoryAttribute);
@ -339,6 +339,10 @@ public:
return this->GetEndAddress() - 1;
}
constexpr KMemoryState GetState() const {
return m_memory_state;
}
constexpr u16 GetIpcLockCount() const {
return m_ipc_lock_count;
}
@ -456,6 +460,13 @@ public:
}
}
constexpr void UpdateAttribute(KMemoryAttribute mask, KMemoryAttribute attr) {
ASSERT(False(mask & KMemoryAttribute::IpcLocked));
ASSERT(False(mask & KMemoryAttribute::DeviceShared));
m_attribute = (m_attribute & ~mask) | attr;
}
constexpr void Split(KMemoryBlock* block, KProcessAddress addr) {
ASSERT(this->GetAddress() < addr);
ASSERT(this->Contains(addr));

70
src/core/hle/kernel/k_memory_block_manager.cpp
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@ -160,8 +160,8 @@ void KMemoryBlockManager::Update(KMemoryBlockManagerUpdateAllocator* allocator,
}
// Update block state.
it->Update(state, perm, attr, cur_address == address, static_cast<u8>(set_disable_attr),
static_cast<u8>(clear_disable_attr));
it->Update(state, perm, attr, it->GetAddress() == address,
static_cast<u8>(set_disable_attr), static_cast<u8>(clear_disable_attr));
cur_address += cur_info.GetSize();
remaining_pages -= cur_info.GetNumPages();
}
@ -175,7 +175,9 @@ void KMemoryBlockManager::UpdateIfMatch(KMemoryBlockManagerUpdateAllocator* allo
KProcessAddress address, size_t num_pages,
KMemoryState test_state, KMemoryPermission test_perm,
KMemoryAttribute test_attr, KMemoryState state,
KMemoryPermission perm, KMemoryAttribute attr) {
KMemoryPermission perm, KMemoryAttribute attr,
KMemoryBlockDisableMergeAttribute set_disable_attr,
KMemoryBlockDisableMergeAttribute clear_disable_attr) {
// Ensure for auditing that we never end up with an invalid tree.
KScopedMemoryBlockManagerAuditor auditor(this);
ASSERT(Common::IsAligned(GetInteger(address), PageSize));
@ -214,7 +216,8 @@ void KMemoryBlockManager::UpdateIfMatch(KMemoryBlockManagerUpdateAllocator* allo
}
// Update block state.
it->Update(state, perm, attr, false, 0, 0);
it->Update(state, perm, attr, false, static_cast<u8>(set_disable_attr),
static_cast<u8>(clear_disable_attr));
cur_address += cur_info.GetSize();
remaining_pages -= cur_info.GetNumPages();
} else {
@ -284,6 +287,65 @@ void KMemoryBlockManager::UpdateLock(KMemoryBlockManagerUpdateAllocator* allocat
this->CoalesceForUpdate(allocator, address, num_pages);
}
void KMemoryBlockManager::UpdateAttribute(KMemoryBlockManagerUpdateAllocator* allocator,
KProcessAddress address, size_t num_pages,
KMemoryAttribute mask, KMemoryAttribute attr) {
// Ensure for auditing that we never end up with an invalid tree.
KScopedMemoryBlockManagerAuditor auditor(this);
ASSERT(Common::IsAligned(GetInteger(address), PageSize));
KProcessAddress cur_address = address;
size_t remaining_pages = num_pages;
iterator it = this->FindIterator(address);
while (remaining_pages > 0) {
const size_t remaining_size = remaining_pages * PageSize;
KMemoryInfo cur_info = it->GetMemoryInfo();
if ((it->GetAttribute() & mask) != attr) {
// If we need to, create a new block before and insert it.
if (cur_info.GetAddress() != GetInteger(cur_address)) {
KMemoryBlock* new_block = allocator->Allocate();
it->Split(new_block, cur_address);
it = m_memory_block_tree.insert(*new_block);
it++;
cur_info = it->GetMemoryInfo();
cur_address = cur_info.GetAddress();
}
// If we need to, create a new block after and insert it.
if (cur_info.GetSize() > remaining_size) {
KMemoryBlock* new_block = allocator->Allocate();
it->Split(new_block, cur_address + remaining_size);
it = m_memory_block_tree.insert(*new_block);
cur_info = it->GetMemoryInfo();
}
// Update block state.
it->UpdateAttribute(mask, attr);
cur_address += cur_info.GetSize();
remaining_pages -= cur_info.GetNumPages();
} else {
// If we already have the right attributes, just advance.
if (cur_address + remaining_size < cur_info.GetEndAddress()) {
remaining_pages = 0;
cur_address += remaining_size;
} else {
remaining_pages =
(cur_address + remaining_size - cur_info.GetEndAddress()) / PageSize;
cur_address = cur_info.GetEndAddress();
}
}
it++;
}
this->CoalesceForUpdate(allocator, address, num_pages);
}
// Debug.
bool KMemoryBlockManager::CheckState() const {
// Loop over every block, ensuring that we are sorted and coalesced.

6
src/core/hle/kernel/k_memory_block_manager.h
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@ -115,7 +115,11 @@ public:
void UpdateIfMatch(KMemoryBlockManagerUpdateAllocator* allocator, KProcessAddress address,
size_t num_pages, KMemoryState test_state, KMemoryPermission test_perm,
KMemoryAttribute test_attr, KMemoryState state, KMemoryPermission perm,
KMemoryAttribute attr);
KMemoryAttribute attr, KMemoryBlockDisableMergeAttribute set_disable_attr,
KMemoryBlockDisableMergeAttribute clear_disable_attr);
void UpdateAttribute(KMemoryBlockManagerUpdateAllocator* allocator, KProcessAddress address,
size_t num_pages, KMemoryAttribute mask, KMemoryAttribute attr);
iterator FindIterator(KProcessAddress address) const {
return m_memory_block_tree.find(KMemoryBlock(

54
src/core/hle/kernel/k_page_table.cpp
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@ -505,7 +505,7 @@ Result KPageTable::UnmapCodeMemory(KProcessAddress dst_address, KProcessAddress
R_TRY(this->CheckMemoryStateContiguous(
std::addressof(num_dst_allocator_blocks), dst_address, size, KMemoryState::FlagCanCodeAlias,
KMemoryState::FlagCanCodeAlias, KMemoryPermission::None, KMemoryPermission::None,
KMemoryAttribute::All, KMemoryAttribute::None));
KMemoryAttribute::All & ~KMemoryAttribute::PermissionLocked, KMemoryAttribute::None));
// Determine whether any pages being unmapped are code.
bool any_code_pages = false;
@ -1770,7 +1770,11 @@ Result KPageTable::MapPhysicalMemory(KProcessAddress address, size_t size) {
m_memory_block_manager.UpdateIfMatch(
std::addressof(allocator), address, size / PageSize, KMemoryState::Free,
KMemoryPermission::None, KMemoryAttribute::None, KMemoryState::Normal,
KMemoryPermission::UserReadWrite, KMemoryAttribute::None);
KMemoryPermission::UserReadWrite, KMemoryAttribute::None,
address == this->GetAliasRegionStart()
? KMemoryBlockDisableMergeAttribute::Normal
: KMemoryBlockDisableMergeAttribute::None,
KMemoryBlockDisableMergeAttribute::None);
R_SUCCEED();
}
@ -1868,6 +1872,13 @@ Result KPageTable::UnmapPhysicalMemory(KProcessAddress address, size_t size) {
// Iterate over the memory, unmapping as we go.
auto it = m_memory_block_manager.FindIterator(cur_address);
const auto clear_merge_attr =
(it->GetState() == KMemoryState::Normal &&
it->GetAddress() == this->GetAliasRegionStart() && it->GetAddress() == address)
? KMemoryBlockDisableMergeAttribute::Normal
: KMemoryBlockDisableMergeAttribute::None;
while (true) {
// Check that the iterator is valid.
ASSERT(it != m_memory_block_manager.end());
@ -1905,7 +1916,7 @@ Result KPageTable::UnmapPhysicalMemory(KProcessAddress address, size_t size) {
m_memory_block_manager.Update(std::addressof(allocator), address, size / PageSize,
KMemoryState::Free, KMemoryPermission::None,
KMemoryAttribute::None, KMemoryBlockDisableMergeAttribute::None,
KMemoryBlockDisableMergeAttribute::None);
clear_merge_attr);
// We succeeded.
R_SUCCEED();
@ -2650,11 +2661,18 @@ Result KPageTable::SetMemoryAttribute(KProcessAddress addr, size_t size, u32 mas
size_t num_allocator_blocks;
constexpr auto AttributeTestMask =
~(KMemoryAttribute::SetMask | KMemoryAttribute::DeviceShared);
R_TRY(this->CheckMemoryState(
std::addressof(old_state), std::addressof(old_perm), std::addressof(old_attr),
std::addressof(num_allocator_blocks), addr, size, KMemoryState::FlagCanChangeAttribute,
KMemoryState::FlagCanChangeAttribute, KMemoryPermission::None, KMemoryPermission::None,
AttributeTestMask, KMemoryAttribute::None, ~AttributeTestMask));
const KMemoryState state_test_mask =
static_cast<KMemoryState>(((mask & static_cast<u32>(KMemoryAttribute::Uncached))
? static_cast<u32>(KMemoryState::FlagCanChangeAttribute)
: 0) |
((mask & static_cast<u32>(KMemoryAttribute::PermissionLocked))
? static_cast<u32>(KMemoryState::FlagCanPermissionLock)
: 0));
R_TRY(this->CheckMemoryState(std::addressof(old_state), std::addressof(old_perm),
std::addressof(old_attr), std::addressof(num_allocator_blocks),
addr, size, state_test_mask, state_test_mask,
KMemoryPermission::None, KMemoryPermission::None,
AttributeTestMask, KMemoryAttribute::None, ~AttributeTestMask));
// Create an update allocator.
Result allocator_result{ResultSuccess};
@ -2662,18 +2680,17 @@ Result KPageTable::SetMemoryAttribute(KProcessAddress addr, size_t size, u32 mas
m_memory_block_slab_manager, num_allocator_blocks);
R_TRY(allocator_result);
// Determine the new attribute.
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);
// If we need to, perform a change attribute operation.
if (True(KMemoryAttribute::Uncached & static_cast<KMemoryAttribute>(mask))) {
// Perform operation.
R_TRY(this->Operate(addr, num_pages, old_perm,
OperationType::ChangePermissionsAndRefreshAndFlush, 0));
}
// Update the blocks.
m_memory_block_manager.Update(std::addressof(allocator), addr, num_pages, old_state, old_perm,
new_attr, KMemoryBlockDisableMergeAttribute::None,
KMemoryBlockDisableMergeAttribute::None);
m_memory_block_manager.UpdateAttribute(std::addressof(allocator), addr, num_pages,
static_cast<KMemoryAttribute>(mask),
static_cast<KMemoryAttribute>(attr));
R_SUCCEED();
}
@ -3086,6 +3103,7 @@ Result KPageTable::Operate(KProcessAddress addr, size_t num_pages, KMemoryPermis
}
case OperationType::ChangePermissions:
case OperationType::ChangePermissionsAndRefresh:
case OperationType::ChangePermissionsAndRefreshAndFlush:
break;
default:
ASSERT(false);

3
src/core/hle/kernel/k_page_table.h
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@ -222,7 +222,8 @@ private:
Unmap = 3,
ChangePermissions = 4,
ChangePermissionsAndRefresh = 5,
Separate = 6,
ChangePermissionsAndRefreshAndFlush = 6,
Separate = 7,
};
static constexpr KMemoryAttribute DefaultMemoryIgnoreAttr =

8
src/core/hle/kernel/svc/svc_memory.cpp
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@ -108,10 +108,16 @@ Result SetMemoryAttribute(Core::System& system, u64 address, u64 size, u32 mask,
R_UNLESS((address < address + size), ResultInvalidCurrentMemory);
// Validate the attribute and mask.
constexpr u32 SupportedMask = static_cast<u32>(MemoryAttribute::Uncached);
constexpr u32 SupportedMask =
static_cast<u32>(MemoryAttribute::Uncached | MemoryAttribute::PermissionLocked);
R_UNLESS((mask | attr) == mask, ResultInvalidCombination);
R_UNLESS((mask | attr | SupportedMask) == SupportedMask, ResultInvalidCombination);
// Check that permission locked is either being set or not masked.
R_UNLESS((static_cast<Svc::MemoryAttribute>(mask) & Svc::MemoryAttribute::PermissionLocked) ==
(static_cast<Svc::MemoryAttribute>(attr) & Svc::MemoryAttribute::PermissionLocked),
ResultInvalidCombination);
// Validate that the region is in range for the current process.
auto& page_table{GetCurrentProcess(system.Kernel()).GetPageTable()};
R_UNLESS(page_table.Contains(address, size), ResultInvalidCurrentMemory);