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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.h
Vendored
+14 -2
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@@ -29,10 +29,22 @@ class BufferCache {
public:
static constexpr uint32_t CACHING_PAGEBITS = 14;
static constexpr uint64_t CACHING_PAGESIZE = uint64_t {1} << CACHING_PAGEBITS;
static constexpr uint64_t CACHING_NUMPAGES = uint64_t {1} << (40 - CACHING_PAGEBITS);
static constexpr uint64_t CACHING_NUMPAGES = (LOWER_ADDRESS_SIZE + LibKernel::Memory::kExtendedMemorySize) >> CACHING_PAGEBITS;
static constexpr uint64_t BDA_PAGETABLE_SIZE =
CACHING_NUMPAGES * sizeof(vk::DeviceAddress);
static constexpr uint64_t PageIndex(uint64_t address) {
return (address < LOWER_ADDRESS_SIZE
? address
: address - LibKernel::Memory::kExtendedMemoryBase + LOWER_ADDRESS_SIZE) >>
CACHING_PAGEBITS;
}
static constexpr uint64_t GuestAddress(uint64_t offset) {
return offset < LOWER_ADDRESS_SIZE
? offset
: offset - LOWER_ADDRESS_SIZE + LibKernel::Memory::kExtendedMemoryBase;
}
BufferCache(GraphicContext& graphics, CommandScheduler& scheduler, PageManager& page_manager,
TextureCache& texture_cache);
~BufferCache();
@@ -88,7 +100,7 @@ private:
bool has_stream_leap;
};
using PageTable = MultiLevelPageTable<BufferId, CACHING_PAGEBITS, 40, 16>;
using PageTable = MultiLevelPageTable<BufferId, CACHING_PAGEBITS, 44, 20>;
static_assert(CACHING_PAGESIZE == (uint64_t {1} << PageTable::kPageBits));
void WriteDataBuffer(Buffer& buffer, uint64_t address, const void* source, uint64_t size);
void TouchBuffer(const Buffer& buffer);