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kern: Implement new PageTable operations/PhysicalMemory reference semantics

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Michael Scire 2022-10-11 22:37:43 -07:00 • committed by SciresM
parent 5ee7d8a5ed
commit 7f2cbba543
8 changed files with 91 additions and 155 deletions
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2
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_k_page_table.hpp
View file

@ -208,7 +208,7 @@ namespace ams::kern::arch::arm64 {
}
}
Result MapContiguous(KProcessAddress virt_addr, KPhysicalAddress phys_addr, size_t num_pages, PageTableEntry entry_template, bool disable_head_merge, PageLinkedList *page_list, bool reuse_ll);
Result MapContiguous(KProcessAddress virt_addr, KPhysicalAddress phys_addr, size_t num_pages, PageTableEntry entry_template, bool disable_head_merge, bool not_first, PageLinkedList *page_list, bool reuse_ll);
Result MapGroup(KProcessAddress virt_addr, const KPageGroup &pg, size_t num_pages, PageTableEntry entry_template, bool disable_head_merge, PageLinkedList *page_list, bool reuse_ll);
bool MergePages(KProcessAddress virt_addr, PageLinkedList *page_list);

18
libraries/libmesosphere/include/mesosphere/kern_k_memory_manager.hpp
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@ -200,7 +200,7 @@ namespace ams::kern {
NOINLINE KPhysicalAddress AllocateAndOpenContinuous(size_t num_pages, size_t align_pages, u32 option);
NOINLINE Result AllocateAndOpen(KPageGroup *out, size_t num_pages, u32 option);
NOINLINE Result AllocateAndOpenForProcess(KPageGroup *out, size_t num_pages, u32 option, u64 process_id, u8 fill_pattern);
NOINLINE Result AllocateForProcess(KPageGroup *out, size_t num_pages, u32 option, u64 process_id, u8 fill_pattern);
Pool GetPool(KPhysicalAddress address) const {
return this->GetManager(address).GetPool();
@ -222,6 +222,22 @@ namespace ams::kern {
}
}
void OpenFirst(KPhysicalAddress address, size_t num_pages) {
/* Repeatedly open references until we've done so for all pages. */
while (num_pages) {
auto &manager = this->GetManager(address);
const size_t cur_pages = std::min(num_pages, manager.GetPageOffsetToEnd(address));
{
KScopedLightLock lk(m_pool_locks[manager.GetPool()]);
manager.OpenFirst(address, cur_pages);
}
num_pages -= cur_pages;
address += cur_pages * PageSize;
}
}
void Close(KPhysicalAddress address, size_t num_pages) {
/* Repeatedly close references until we've done so for all pages. */
while (num_pages) {

1
libraries/libmesosphere/include/mesosphere/kern_k_page_group.hpp
View file

@ -138,6 +138,7 @@ namespace ams::kern {
Result AddBlock(KPhysicalAddress addr, size_t num_pages);
void Open() const;
void OpenFirst() const;
void Close() const;
size_t GetNumPages() const;

10
libraries/libmesosphere/include/mesosphere/kern_k_page_table_base.hpp
View file

@ -73,10 +73,12 @@ namespace ams::kern {
enum OperationType {
OperationType_Map = 0,
OperationType_MapGroup = 1,
OperationType_Unmap = 2,
OperationType_ChangePermissions = 3,
OperationType_ChangePermissionsAndRefresh = 4,
OperationType_MapFirst = 1,
OperationType_MapGroup = 2,
OperationType_Unmap = 3,
OperationType_ChangePermissions = 4,
OperationType_ChangePermissionsAndRefresh = 5,
OperationType_Separate = 6,
};
static constexpr size_t MaxPhysicalMapAlignment = 1_GB;