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Code Issues Releases Activity

kern: update UnmapIoRegion for new Mapping_Memory handling

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This commit is contained in:
Michael Scire 2023-02-21 08:02:59 -07:00
parent 8eef019e3d
commit ba483dea8a
4 changed files with 28 additions and 7 deletions
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4
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_k_process_page_table.hpp
View file

@ -98,8 +98,8 @@ namespace ams::kern::arch::arm64 {
R_RETURN(m_page_table.MapIoRegion(dst_address, phys_addr, size, mapping, perm));
}
Result UnmapIoRegion(KProcessAddress dst_address, KPhysicalAddress phys_addr, size_t size) {
R_RETURN(m_page_table.UnmapIoRegion(dst_address, phys_addr, size));
Result UnmapIoRegion(KProcessAddress dst_address, KPhysicalAddress phys_addr, size_t size, ams::svc::MemoryMapping mapping) {
R_RETURN(m_page_table.UnmapIoRegion(dst_address, phys_addr, size, mapping));
}
Result MapStatic(KPhysicalAddress phys_addr, size_t size, KMemoryPermission perm) {

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

@ -363,7 +363,7 @@ namespace ams::kern {
Result UnmapCodeMemory(KProcessAddress dst_address, KProcessAddress src_address, size_t size);
Result MapIo(KPhysicalAddress phys_addr, size_t size, KMemoryPermission perm);
Result MapIoRegion(KProcessAddress dst_address, KPhysicalAddress phys_addr, size_t size, ams::svc::MemoryMapping mapping, ams::svc::MemoryPermission perm);
Result UnmapIoRegion(KProcessAddress dst_address, KPhysicalAddress phys_addr, size_t size);
Result UnmapIoRegion(KProcessAddress dst_address, KPhysicalAddress phys_addr, size_t size, ams::svc::MemoryMapping mapping);
Result MapStatic(KPhysicalAddress phys_addr, size_t size, KMemoryPermission perm);
Result MapRegion(KMemoryRegionType region_type, KMemoryPermission perm);
Result MapInsecureMemory(KProcessAddress address, size_t size);

2
libraries/libmesosphere/source/kern_k_io_region.cpp
View file

@ -85,7 +85,7 @@ namespace ams::kern {
KScopedLightLock lk(m_lock);
/* Unmap ourselves. */
R_TRY(GetCurrentProcess().GetPageTable().UnmapIoRegion(address, m_physical_address, size));
R_TRY(GetCurrentProcess().GetPageTable().UnmapIoRegion(address, m_physical_address, size, m_mapping));
/* Remove ourselves from the current process. */
GetCurrentProcess().RemoveIoRegion(this);

27
libraries/libmesosphere/source/kern_k_page_table_base.cpp
View file

@ -2019,15 +2019,22 @@ namespace ams::kern {
R_SUCCEED();
}
Result KPageTableBase::UnmapIoRegion(KProcessAddress dst_address, KPhysicalAddress phys_addr, size_t size) {
Result KPageTableBase::UnmapIoRegion(KProcessAddress dst_address, KPhysicalAddress phys_addr, size_t size, ams::svc::MemoryMapping mapping) {
const size_t num_pages = size / PageSize;
/* Lock the table. */
KScopedLightLock lk(m_general_lock);
/* Validate the memory state. */
KMemoryState old_state;
KMemoryPermission old_perm;
KMemoryAttribute old_attr;
size_t num_allocator_blocks;
R_TRY(this->CheckMemoryState(std::addressof(num_allocator_blocks), dst_address, size, KMemoryState_All, KMemoryState_Io, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_All, KMemoryAttribute_Locked));
R_TRY(this->CheckMemoryState(std::addressof(old_state), std::addressof(old_perm), std::addressof(old_attr), std::addressof(num_allocator_blocks),
dst_address, size,
KMemoryState_All, KMemoryState_Io,
KMemoryPermission_None, KMemoryPermission_None,
KMemoryAttribute_All, KMemoryAttribute_Locked));
/* Validate that the region being unmapped corresponds to the physical range described. */
{
@ -2060,9 +2067,23 @@ namespace ams::kern {
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* If the region being unmapped is Memory, synchronize. */
if (mapping == ams::svc::MemoryMapping_Memory) {
/* Change the region to be uncached. */
const KPageProperties properties = { old_perm, false, true, DisableMergeAttribute_None };
MESOSPHERE_R_ABORT_UNLESS(this->Operate(updater.GetPageList(), dst_address, num_pages, Null<KPhysicalAddress>, false, properties, OperationType_ChangePermissionsAndRefresh, false));
/* Temporarily unlock ourselves, so that other operations can occur while we flush the region. */
m_general_lock.Unlock();
ON_SCOPE_EXIT { m_general_lock.Lock(); };
/* Flush the region. */
MESOSPHERE_R_ABORT_UNLESS(cpu::FlushDataCache(GetVoidPointer(dst_address), size));
}
/* Perform the unmap. */
const KPageProperties unmap_properties = { KMemoryPermission_None, false, false, DisableMergeAttribute_None };
R_TRY(this->Operate(updater.GetPageList(), dst_address, num_pages, Null<KPhysicalAddress>, false, unmap_properties, OperationType_Unmap, false));
MESOSPHERE_R_ABORT_UNLESS(this->Operate(updater.GetPageList(), dst_address, num_pages, Null<KPhysicalAddress>, false, unmap_properties, OperationType_Unmap, false));
/* Update the blocks. */
m_memory_block_manager.Update(std::addressof(allocator), dst_address, num_pages, KMemoryState_Free, KMemoryPermission_None, KMemoryAttribute_None, KMemoryBlockDisableMergeAttribute_None, KMemoryBlockDisableMergeAttribute_Normal);