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kern: update KMemoryRegion to store last address rather than size

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This commit is contained in:
Michael Scire 2020-12-01 16:42:25 -08:00 committed by SciresM
parent 5da6b60008
commit aac8af8bf5
3 changed files with 36 additions and 37 deletions
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40
libraries/libmesosphere/include/mesosphere/kern_k_memory_region.hpp
View file

@ -29,7 +29,7 @@ namespace ams::kern {
private:
uintptr_t address;
uintptr_t pair_address;
size_t region_size;
uintptr_t last_address;
u32 attributes;
u32 type_id;
public:
@ -43,18 +43,18 @@ namespace ams::kern {
}
}
public:
constexpr ALWAYS_INLINE KMemoryRegion() : address(0), pair_address(0), region_size(0), attributes(0), type_id(0) { /* ... */ }
constexpr ALWAYS_INLINE KMemoryRegion(uintptr_t a, size_t rs, uintptr_t p, u32 r, u32 t) :
address(a), pair_address(p), region_size(rs), attributes(r), type_id(t)
constexpr ALWAYS_INLINE KMemoryRegion() : address(0), pair_address(0), last_address(0), attributes(0), type_id(0) { /* ... */ }
constexpr ALWAYS_INLINE KMemoryRegion(uintptr_t a, size_t la, uintptr_t p, u32 r, u32 t) :
address(a), pair_address(p), last_address(la), attributes(r), type_id(t)
{
/* ... */
}
constexpr ALWAYS_INLINE KMemoryRegion(uintptr_t a, size_t rs, u32 r, u32 t) : KMemoryRegion(a, rs, std::numeric_limits<uintptr_t>::max(), r, t) { /* ... */ }
constexpr ALWAYS_INLINE KMemoryRegion(uintptr_t a, size_t la, u32 r, u32 t) : KMemoryRegion(a, la, std::numeric_limits<uintptr_t>::max(), r, t) { /* ... */ }
private:
constexpr ALWAYS_INLINE void Reset(uintptr_t a, uintptr_t rs, uintptr_t p, u32 r, u32 t) {
constexpr ALWAYS_INLINE void Reset(uintptr_t a, uintptr_t la, uintptr_t p, u32 r, u32 t) {
this->address = a;
this->pair_address = p;
this->region_size = rs;
this->last_address = la;
this->attributes = r;
this->type_id = t;
}
@ -67,16 +67,16 @@ namespace ams::kern {
return this->pair_address;
}
constexpr ALWAYS_INLINE size_t GetSize() const {
return this->region_size;
constexpr ALWAYS_INLINE uintptr_t GetLastAddress() const {
return this->last_address;
}
constexpr ALWAYS_INLINE uintptr_t GetEndAddress() const {
return this->GetAddress() + this->GetSize();
return this->GetLastAddress() + 1;
}
constexpr ALWAYS_INLINE uintptr_t GetLastAddress() const {
return this->GetEndAddress() - 1;
constexpr ALWAYS_INLINE size_t GetSize() const {
return this->GetEndAddress() - this->GetAddress();
}
constexpr ALWAYS_INLINE u32 GetAttributes() const {
@ -130,17 +130,17 @@ namespace ams::kern {
return this->first_region->GetAddress();
}
constexpr ALWAYS_INLINE uintptr_t GetLastAddress() const {
return this->last_region->GetLastAddress();
}
constexpr ALWAYS_INLINE uintptr_t GetEndAddress() const {
return this->last_region->GetEndAddress();
return this->GetLastAddress() + 1;
}
constexpr ALWAYS_INLINE size_t GetSize() const {
return this->GetEndAddress() - this->GetAddress();
}
constexpr ALWAYS_INLINE uintptr_t GetLastAddress() const {
return this->GetEndAddress() - 1;
}
};
private:
using TreeType = util::IntrusiveRedBlackTreeBaseTraits<KMemoryRegion>::TreeType<KMemoryRegion>;
@ -160,7 +160,7 @@ namespace ams::kern {
constexpr ALWAYS_INLINE KMemoryRegionTree() : tree() { /* ... */ }
public:
KMemoryRegion *FindModifiable(uintptr_t address) {
if (auto it = this->find(KMemoryRegion(address, 1, 0, 0)); it != this->end()) {
if (auto it = this->find(KMemoryRegion(address, address, 0, 0)); it != this->end()) {
return std::addressof(*it);
} else {
return nullptr;
@ -168,7 +168,7 @@ namespace ams::kern {
}
const KMemoryRegion *Find(uintptr_t address) const {
if (auto it = this->find(KMemoryRegion(address, 1, 0, 0)); it != this->cend()) {
if (auto it = this->find(KMemoryRegion(address, address, 0, 0)); it != this->cend()) {
return std::addressof(*it);
} else {
return nullptr;
@ -234,7 +234,7 @@ namespace ams::kern {
return extents;
}
public:
NOINLINE void InsertDirectly(uintptr_t address, size_t size, u32 attr = 0, u32 type_id = 0);
NOINLINE void InsertDirectly(uintptr_t address, uintptr_t last_address, u32 attr = 0, u32 type_id = 0);
NOINLINE bool Insert(uintptr_t address, size_t size, u32 type_id, u32 new_attr = 0, u32 old_attr = 0);
NOINLINE KVirtualAddress GetRandomAlignedRegion(size_t size, size_t alignment, u32 type_id);

29
libraries/libmesosphere/source/kern_k_memory_layout.cpp
View file

@ -40,8 +40,6 @@ namespace ams::kern {
new (region) KMemoryRegion(std::forward<Args>(args)...);
return region;
return &this->region_heap[this->num_regions++];
}
};
@ -55,8 +53,8 @@ namespace ams::kern {
}
void KMemoryRegionTree::InsertDirectly(uintptr_t address, size_t size, u32 attr, u32 type_id) {
this->insert(*AllocateRegion(address, size, attr, type_id));
void KMemoryRegionTree::InsertDirectly(uintptr_t address, uintptr_t last_address, u32 attr, u32 type_id) {
this->insert(*AllocateRegion(address, last_address, attr, type_id));
}
bool KMemoryRegionTree::Insert(uintptr_t address, size_t size, u32 type_id, u32 new_attr, u32 old_attr) {
@ -82,9 +80,7 @@ namespace ams::kern {
/* Cache information from the region before we remove it. */
const uintptr_t old_address = found->GetAddress();
const size_t old_size = found->GetSize();
const uintptr_t old_end = old_address + old_size;
const uintptr_t old_last = old_end - 1;
const uintptr_t old_last = found->GetLastAddress();
const uintptr_t old_pair = found->GetPairAddress();
const u32 old_type = found->GetType();
@ -92,24 +88,24 @@ namespace ams::kern {
this->erase(this->iterator_to(*found));
/* Insert the new region into the tree. */
const uintptr_t new_pair = (old_pair != std::numeric_limits<uintptr_t>::max()) ? old_pair + (address - old_address) : old_pair;
if (old_address == address) {
/* Reuse the old object for the new region, if we can. */
found->Reset(address, size, new_pair, new_attr, type_id);
found->Reset(address, inserted_region_last, old_pair, new_attr, type_id);
this->insert(*found);
} else {
/* If we can't re-use, adjust the old region. */
found->Reset(old_address, address - old_address, old_pair, old_attr, old_type);
found->Reset(old_address, address - 1, old_pair, old_attr, old_type);
this->insert(*found);
/* Insert a new region for the split. */
this->insert(*AllocateRegion(address, size, new_pair, new_attr, type_id));
const uintptr_t new_pair = (old_pair != std::numeric_limits<uintptr_t>::max()) ? old_pair + (address - old_address) : old_pair;
this->insert(*AllocateRegion(address, inserted_region_last, new_pair, new_attr, type_id));
}
/* If we need to insert a region after the region, do so. */
if (old_last != inserted_region_last) {
const uintptr_t after_pair = (old_pair != std::numeric_limits<uintptr_t>::max()) ? old_pair + (inserted_region_end - old_address) : old_pair;
this->insert(*AllocateRegion(inserted_region_end, old_end - inserted_region_end, after_pair, old_attr, old_type));
this->insert(*AllocateRegion(inserted_region_end, old_last, after_pair, old_attr, old_type));
}
return true;
@ -125,8 +121,11 @@ namespace ams::kern {
const uintptr_t first_address = extents.GetAddress();
const uintptr_t last_address = extents.GetLastAddress();
const uintptr_t first_index = first_address / alignment;
const uintptr_t last_index = last_address / alignment;
while (true) {
const uintptr_t candidate = util::AlignDown(KSystemControl::Init::GenerateRandomRange(first_address, last_address), alignment);
const uintptr_t candidate = KSystemControl::Init::GenerateRandomRange(first_index, last_index) * alignment;
/* Ensure that the candidate doesn't overflow with the size. */
if (!(candidate < candidate + size)) {
@ -157,13 +156,13 @@ namespace ams::kern {
/* Initialize linear trees. */
for (auto &region : GetPhysicalMemoryRegionTree()) {
if (region.HasTypeAttribute(KMemoryRegionAttr_LinearMapped)) {
GetPhysicalLinearMemoryRegionTree().InsertDirectly(region.GetAddress(), region.GetSize(), region.GetAttributes(), region.GetType());
GetPhysicalLinearMemoryRegionTree().InsertDirectly(region.GetAddress(), region.GetLastAddress(), region.GetAttributes(), region.GetType());
}
}
for (auto &region : GetVirtualMemoryRegionTree()) {
if (region.IsDerivedFrom(KMemoryRegionType_Dram)) {
GetVirtualLinearMemoryRegionTree().InsertDirectly(region.GetAddress(), region.GetSize(), region.GetAttributes(), region.GetType());
GetVirtualLinearMemoryRegionTree().InsertDirectly(region.GetAddress(), region.GetLastAddress(), region.GetAttributes(), region.GetType());
}
}
}

4
mesosphere/kernel/source/arch/arm64/init/kern_init_core.cpp
View file

@ -139,10 +139,10 @@ namespace ams::kern::init {
InitializeSlabResourceCounts();
/* Insert the root region for the virtual memory tree, from which all other regions will derive. */
KMemoryLayout::GetVirtualMemoryRegionTree().InsertDirectly(KernelVirtualAddressSpaceBase, KernelVirtualAddressSpaceSize);
KMemoryLayout::GetVirtualMemoryRegionTree().InsertDirectly(KernelVirtualAddressSpaceBase, KernelVirtualAddressSpaceBase + KernelVirtualAddressSpaceSize - 1);
/* Insert the root region for the physical memory tree, from which all other regions will derive. */
KMemoryLayout::GetPhysicalMemoryRegionTree().InsertDirectly(KernelPhysicalAddressSpaceBase, KernelPhysicalAddressSpaceSize);
KMemoryLayout::GetPhysicalMemoryRegionTree().InsertDirectly(KernelPhysicalAddressSpaceBase, KernelPhysicalAddressSpaceBase + KernelPhysicalAddressSpaceSize - 1);
/* Save start and end for ease of use. */
const uintptr_t code_start_virt_addr = reinterpret_cast<uintptr_t>(_start);