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gpu: address extended guest memory without widening dense cache tables

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This commit is contained in:
nmzik
2026-09-28 16:32:32 +04:00
parent c91fe80d64
commit 2016f8e2fe
12 changed files with 81 additions and 34 deletions
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src/graphics/host_gpu/renderer/cache/bufferCache.cpp
Vendored
+11 -5
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@@ -55,7 +55,8 @@ template <bool insert>
void BufferCache::ChangeRegister(BufferId id) {
auto& buffer = m_slot_buffers[id];
PageTable::PageRange pages {};
EXIT_IF(!PageTable::TryGetPageRange(buffer.CpuAddress(), buffer.Size(), pages));
EXIT_IF(!(GuestRange {buffer.CpuAddress(), buffer.Size()}.Valid()) ||
!PageTable::TryGetPageRange(buffer.CpuAddress(), buffer.Size(), pages));
for (size_t page = pages.first; page < pages.last_exclusive; ++page) {
if constexpr (insert) {
m_page_table[page] = id;
@@ -64,6 +65,7 @@ void BufferCache::ChangeRegister(BufferId id) {
}
}
const auto size_pages = pages.last_exclusive - pages.first;
const auto table_offset = PageIndex(buffer.CpuAddress()) * sizeof(vk::DeviceAddress);
if constexpr (insert) {
const auto [it, inserted] = m_buffers.emplace(buffer.CpuAddress(), id);
(void)it;
@@ -75,7 +77,7 @@ void BufferCache::ChangeRegister(BufferId id) {
for (uint64_t i = 0; i < size_pages; ++i) {
addresses.push_back(buffer.BufferDeviceAddress() + (i << CACHING_PAGEBITS));
}
WriteDataBuffer(m_bda_pagetable_buffer, pages.first * sizeof(vk::DeviceAddress),
WriteDataBuffer(m_bda_pagetable_buffer, table_offset,
addresses.data(), addresses.size() * sizeof(vk::DeviceAddress));
} else {
const auto found = m_buffers.find(buffer.CpuAddress());
@@ -84,7 +86,7 @@ void BufferCache::ChangeRegister(BufferId id) {
EXIT_IF(buffer.Size() > m_total_used_memory);
m_total_used_memory -= buffer.Size();
m_lru_cache.Free(buffer.lru_id);
m_bda_pagetable_buffer.Fill(pages.first * sizeof(vk::DeviceAddress),
m_bda_pagetable_buffer.Fill(table_offset,
size_pages * sizeof(vk::DeviceAddress), 0);
buffer.is_deleted = true;
}
@@ -312,10 +314,14 @@ BufferCache::OverlapResult BufferCache::ResolveOverlaps(uint64_t vaddr, uint64_t
// Reserve space in the incoming stream's direction of growth.
// The old buffer extending left of the request predicts growth to the right, and vice versa.
if (expands_left) {
end += std::min(StreamLeapSize, PageTable::kAddressSpaceSize - end);
end += std::min(StreamLeapSize, (vaddr < LOWER_ADDRESS_SIZE ? LOWER_ADDRESS_SIZE
: LibKernel::Memory::kExtendedMemoryBase +
LibKernel::Memory::kExtendedMemorySize) - end);
}
if (expands_right) {
const auto minimum = CACHING_PAGESIZE * 2;
const auto minimum = vaddr < LOWER_ADDRESS_SIZE
? CACHING_PAGESIZE * 2
: LibKernel::Memory::kExtendedMemoryBase;
if (begin > minimum) {
begin -= std::min(StreamLeapSize, begin - minimum);
}