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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/regionDefinitions.h
+8 -3
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@@ -3,6 +3,7 @@
#include "common/bitArray.h"
#include "common/common.h"
#include "kernel/memory.h"
#include <compare>
@@ -10,7 +11,8 @@ namespace Libs::Graphics {
constexpr uint64_t TRACKER_PAGE_SIZE = 4ull * 1024ull;
constexpr uint64_t TRACKER_REGION_SIZE = 4ull * 1024ull * 1024ull;
constexpr uint64_t TRACKER_ADDRESS_SIZE = 1ull << 40u;
constexpr uint64_t TRACKER_ADDRESS_SIZE = 1ull << 44u;
constexpr uint64_t LOWER_ADDRESS_SIZE = 1ull << 40u;
constexpr size_t TRACKER_REGION_PAGES = TRACKER_REGION_SIZE / TRACKER_PAGE_SIZE;
struct GuestRange {
@@ -19,8 +21,11 @@ struct GuestRange {
[[nodiscard]] constexpr bool Empty() const noexcept { return address == 0 && size == 0; }
[[nodiscard]] constexpr bool Valid() const noexcept {
return address != 0 && size != 0 && address < TRACKER_ADDRESS_SIZE &&
size <= TRACKER_ADDRESS_SIZE - address;
if (address == 0 || size == 0) return false;
if (address < LOWER_ADDRESS_SIZE) return size <= LOWER_ADDRESS_SIZE - address;
constexpr auto base = LibKernel::Memory::kExtendedMemoryBase;
constexpr auto length = LibKernel::Memory::kExtendedMemorySize;
return address >= base && address - base < length && size <= length - (address - base);
}
[[nodiscard]] constexpr bool ValidOrEmpty() const noexcept { return Empty() || Valid(); }
[[nodiscard]] constexpr uint64_t End() const noexcept { return address + size; }