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kern: allocate all TTBR0 pages during init, use procidx as asid

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This commit is contained in:
Michael Scire 2024-10-09 14:04:15 -07:00 • committed by SciresM
parent c3fa42d958
commit a72e39d657
9 changed files with 72 additions and 110 deletions
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25
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_k_page_table.hpp
View file

@ -93,9 +93,13 @@ namespace ams::kern::arch::arm64 {
MESOSPHERE_ASSERT(alignment < L1BlockSize);
return KPageTable::GetBlockSize(static_cast<KPageTable::BlockType>(KPageTable::GetBlockType(alignment) + 1));
}
public:
/* TODO: How should this size be determined. Does the KProcess slab count need to go in a header as a define? */
static constexpr size_t NumTtbr0Entries = 81;
private:
static constinit inline const volatile u64 s_ttbr0_entries[NumTtbr0Entries] = {};
private:
KPageTableManager *m_manager;
u64 m_ttbr;
u8 m_asid;
protected:
Result OperateImpl(PageLinkedList *page_list, KProcessAddress virt_addr, size_t num_pages, KPhysicalAddress phys_addr, bool is_pa_valid, const KPageProperties properties, OperationType operation, bool reuse_ll);
@ -168,17 +172,28 @@ namespace ams::kern::arch::arm64 {
return entry;
}
public:
constexpr explicit KPageTable(util::ConstantInitializeTag) : KPageTableBase(util::ConstantInitialize), m_manager(), m_ttbr(), m_asid() { /* ... */ }
constexpr explicit KPageTable(util::ConstantInitializeTag) : KPageTableBase(util::ConstantInitialize), m_manager(), m_asid() { /* ... */ }
explicit KPageTable() { /* ... */ }
static NOINLINE void Initialize(s32 core_id);
ALWAYS_INLINE void Activate(u32 proc_id) {
cpu::SwitchProcess(m_ttbr, proc_id);
static const volatile u64 &GetTtbr0Entry(size_t index) { return s_ttbr0_entries[index]; }
static ALWAYS_INLINE u64 GetKernelTtbr0() {
return s_ttbr0_entries[0];
}
static ALWAYS_INLINE void ActivateKernel() {
/* Activate, using asid 0 and process id = 0xFFFFFFFF */
cpu::SwitchProcess(GetKernelTtbr0(), 0xFFFFFFFF);
}
static ALWAYS_INLINE void ActivateProcess(size_t proc_idx, u32 proc_id) {
cpu::SwitchProcess(s_ttbr0_entries[proc_idx + 1], proc_id);
}
NOINLINE Result InitializeForKernel(void *table, KVirtualAddress start, KVirtualAddress end);
NOINLINE Result InitializeForProcess(ams::svc::CreateProcessFlag flags, bool from_back, KMemoryManager::Pool pool, KProcessAddress code_address, size_t code_size, KSystemResource *system_resource, KResourceLimit *resource_limit);
NOINLINE Result InitializeForProcess(ams::svc::CreateProcessFlag flags, bool from_back, KMemoryManager::Pool pool, KProcessAddress code_address, size_t code_size, KSystemResource *system_resource, KResourceLimit *resource_limit, size_t process_index);
Result Finalize();
private:
Result MapL1Blocks(KProcessAddress virt_addr, KPhysicalAddress phys_addr, size_t num_pages, PageTableEntry entry_template, bool disable_head_merge, PageLinkedList *page_list, bool reuse_ll);

8
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_k_process_page_table.hpp
View file

@ -23,13 +23,13 @@ namespace ams::kern::arch::arm64 {
private:
KPageTable m_page_table;
public:
void Activate(u64 id) {
void Activate(size_t process_index, u64 id) {
/* Activate the page table with the specified contextidr. */
m_page_table.Activate(id);
m_page_table.ActivateProcess(process_index, id);
}
Result Initialize(ams::svc::CreateProcessFlag flags, bool from_back, KMemoryManager::Pool pool, KProcessAddress code_address, size_t code_size, KSystemResource *system_resource, KResourceLimit *resource_limit) {
R_RETURN(m_page_table.InitializeForProcess(flags, from_back, pool, code_address, code_size, system_resource, resource_limit));
Result Initialize(ams::svc::CreateProcessFlag flags, bool from_back, KMemoryManager::Pool pool, KProcessAddress code_address, size_t code_size, KSystemResource *system_resource, KResourceLimit *resource_limit, size_t process_index) {
R_RETURN(m_page_table.InitializeForProcess(flags, from_back, pool, code_address, code_size, system_resource, resource_limit, process_index));
}
void Finalize() { m_page_table.Finalize(); }

3
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_k_supervisor_page_table.hpp
View file

@ -29,8 +29,7 @@ namespace ams::kern::arch::arm64 {
NOINLINE void Initialize(s32 core_id);
void Activate() {
/* Activate, using process id = 0xFFFFFFFF */
m_page_table.Activate(0xFFFFFFFF);
m_page_table.ActivateKernel();
}
void ActivateForInit() {

2
libraries/libmesosphere/include/mesosphere/kern_k_process.hpp
View file

@ -374,7 +374,7 @@ namespace ams::kern {
/* Update the current page table. */
if (next_process) {
next_process->GetPageTable().Activate(next_process->GetProcessId());
next_process->GetPageTable().Activate(next_process->GetSlabIndex(), next_process->GetProcessId());
} else {
Kernel::GetKernelPageTable().Activate();
}