| // Copyright 2019 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "host-common/address_space_host_memory_allocator.h" |
| #include "host-common/address_space_device.hpp" |
| #include "host-common/vm_operations.h" |
| #include "host-common/crash-handler.h" |
| #include "host-common/crash_reporter.h" |
| #include "aemu/base/AlignedBuf.h" |
| |
| namespace android { |
| namespace emulation { |
| |
| AddressSpaceHostMemoryAllocatorContext::AddressSpaceHostMemoryAllocatorContext( |
| const address_space_device_control_ops *ops) |
| : m_ops(ops) { |
| } |
| |
| AddressSpaceHostMemoryAllocatorContext::~AddressSpaceHostMemoryAllocatorContext() { |
| clear(); |
| } |
| |
| void AddressSpaceHostMemoryAllocatorContext::perform(AddressSpaceDevicePingInfo *info) { |
| uint64_t result; |
| |
| switch (static_cast<HostMemoryAllocatorCommand>(info->metadata)) { |
| case HostMemoryAllocatorCommand::Allocate: |
| result = allocate(info); |
| break; |
| |
| case HostMemoryAllocatorCommand::Unallocate: |
| result = unallocate(info); |
| break; |
| |
| default: |
| result = -1; |
| break; |
| } |
| |
| info->metadata = result; |
| } |
| |
| void *AddressSpaceHostMemoryAllocatorContext::allocate_impl(const uint64_t phys_addr, |
| const uint64_t size) { |
| #if defined(__APPLE__) && defined(__arm64__) |
| constexpr uint64_t alignment = 16384; |
| #else |
| constexpr uint64_t alignment = 4096; |
| #endif |
| const uint64_t aligned_size = ((size + alignment - 1) / alignment) * alignment; |
| |
| void *host_ptr = android::aligned_buf_alloc(alignment, aligned_size); |
| if (host_ptr) { |
| auto r = m_paddr2ptr.insert({phys_addr, {host_ptr, aligned_size}}); |
| if (r.second) { |
| if (m_ops->add_memory_mapping(phys_addr, host_ptr, aligned_size)) { |
| return host_ptr; |
| } else { |
| m_paddr2ptr.erase(r.first); |
| android::aligned_buf_free(host_ptr); |
| return nullptr; |
| } |
| } else { |
| android::aligned_buf_free(host_ptr); |
| return nullptr; |
| } |
| } else { |
| return nullptr; |
| } |
| } |
| |
| uint64_t AddressSpaceHostMemoryAllocatorContext::allocate(AddressSpaceDevicePingInfo *info) { |
| void* host_ptr = allocate_impl(info->phys_addr, info->size); |
| if (host_ptr) { |
| return 0; |
| } else { |
| return -1; |
| } |
| } |
| |
| uint64_t AddressSpaceHostMemoryAllocatorContext::unallocate(AddressSpaceDevicePingInfo *info) { |
| const uint64_t phys_addr = info->phys_addr; |
| const auto i = m_paddr2ptr.find(phys_addr); |
| if (i != m_paddr2ptr.end()) { |
| void* host_ptr = i->second.first; |
| const uint64_t size = i->second.second; |
| |
| if (m_ops->remove_memory_mapping(phys_addr, host_ptr, size)) { |
| android::aligned_buf_free(host_ptr); |
| m_paddr2ptr.erase(i); |
| return 0; |
| } else { |
| crashhandler_die("Failed remove a memory mapping {phys_addr=%lx, host_ptr=%p, size=%lu}", |
| phys_addr, host_ptr, size); |
| } |
| } else { |
| return -1; |
| } |
| return 0; |
| } |
| |
| AddressSpaceDeviceType AddressSpaceHostMemoryAllocatorContext::getDeviceType() const { |
| return AddressSpaceDeviceType::HostMemoryAllocator; |
| } |
| |
| void AddressSpaceHostMemoryAllocatorContext::save(base::Stream* stream) const { |
| stream->putBe32(m_paddr2ptr.size()); |
| |
| for (const auto &kv : m_paddr2ptr) { |
| const uint64_t phys_addr = kv.first; |
| const uint64_t size = kv.second.second; |
| const void *mem = kv.second.first; |
| |
| stream->putBe64(phys_addr); |
| stream->putBe64(size); |
| stream->write(mem, size); |
| } |
| } |
| |
| bool AddressSpaceHostMemoryAllocatorContext::load(base::Stream* stream) { |
| clear(); |
| |
| size_t size = stream->getBe32(); |
| |
| for (size_t i = 0; i < size; ++i) { |
| uint64_t phys_addr = stream->getBe64(); |
| uint64_t size = stream->getBe64(); |
| void *mem = allocate_impl(phys_addr, size); |
| if (mem) { |
| if (stream->read(mem, size) != static_cast<ssize_t>(size)) { |
| return false; |
| } |
| } else { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| void AddressSpaceHostMemoryAllocatorContext::clear() { |
| for (const auto& kv : m_paddr2ptr) { |
| uint64_t phys_addr = kv.first; |
| void *host_ptr = kv.second.first; |
| size_t size = kv.second.second; |
| |
| if (m_ops->remove_memory_mapping(phys_addr, host_ptr, size)) { |
| android::aligned_buf_free(host_ptr); |
| } else { |
| crashhandler_die("Failed remove a memory mapping {phys_addr=%lx, host_ptr=%p, size=%lu}", |
| phys_addr, host_ptr, size); |
| } |
| } |
| } |
| |
| } // namespace emulation |
| } // namespace android |