vm_manager: Add member function for setting memory attributes across an address range

This puts the backing functionality for svcSetMemoryAttribute in place,
which will be utilized in a following change.
This commit is contained in:
Lioncash 2018-12-15 14:29:39 -05:00
parent 603cc72168
commit 622242e345
2 changed files with 41 additions and 0 deletions

View file

@ -322,6 +322,34 @@ MemoryInfo VMManager::QueryMemory(VAddr address) const {
return memory_info;
}
ResultCode VMManager::SetMemoryAttribute(VAddr address, u64 size, MemoryAttribute mask,
MemoryAttribute attribute) {
constexpr auto ignore_mask = MemoryAttribute::Uncached | MemoryAttribute::DeviceMapped;
constexpr auto attribute_mask = ~ignore_mask;
const auto result = CheckRangeState(
address, size, MemoryState::FlagUncached, MemoryState::FlagUncached, VMAPermission::None,
VMAPermission::None, attribute_mask, MemoryAttribute::None, ignore_mask);
if (result.Failed()) {
return result.Code();
}
const auto [prev_state, prev_permissions, prev_attributes] = *result;
const auto new_attribute = (prev_attributes & ~mask) | (mask & attribute);
const auto carve_result = CarveVMARange(address, size);
if (carve_result.Failed()) {
return carve_result.Code();
}
auto vma_iter = *carve_result;
vma_iter->second.attribute = new_attribute;
MergeAdjacent(vma_iter);
return RESULT_SUCCESS;
}
ResultCode VMManager::MirrorMemory(VAddr dst_addr, VAddr src_addr, u64 size, MemoryState state) {
const auto vma = FindVMA(src_addr);

View file

@ -392,6 +392,19 @@ public:
///
MemoryInfo QueryMemory(VAddr address) const;
/// Sets an attribute across the given address range.
///
/// @param address The starting address
/// @param size The size of the range to set the attribute on.
/// @param mask The attribute mask
/// @param attribute The attribute to set across the given address range
///
/// @returns RESULT_SUCCESS if successful
/// @returns ERR_INVALID_ADDRESS_STATE if the attribute could not be set.
///
ResultCode SetMemoryAttribute(VAddr address, u64 size, MemoryAttribute mask,
MemoryAttribute attribute);
/**
* Scans all VMAs and updates the page table range of any that use the given vector as backing
* memory. This should be called after any operation that causes reallocation of the vector.