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memory: remove per-page host protection bookkeeping

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This commit is contained in:
nmzik
2026-09-11 12:49:30 +04:00
parent 0cd7682012
commit 73363f1272
6 changed files with 21 additions and 115 deletions
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tests/VirtualMemoryAllocationTests.cpp
+7 -17
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@@ -1147,23 +1147,13 @@ void TestDirectPartialProtectUnmapPreservesNeighbors() {
Libs::LibKernel::Memory::KernelMunmap(base + SceKernelPageSize, SceKernelPageSize),
"KernelMunmap(middle)");
Common::VirtualMemory::Mode old_left {};
Common::VirtualMemory::Mode old_right {};
Check(test,
Common::VirtualMemory::Protect(base, SceKernelPageSize,
Common::VirtualMemory::Mode::ReadWrite, &old_left),
"could not inspect left-page protection");
Check(test,
Common::VirtualMemory::Protect(base + SceKernelPageSize * 2, SceKernelPageSize,
Common::VirtualMemory::Mode::ReadWrite, &old_right),
"could not inspect right-page protection");
Check(test, old_left == Common::VirtualMemory::Mode::ReadWrite,
"partial unmap changed the left neighbor protection");
Check(test, old_right == Common::VirtualMemory::Mode::ReadWrite,
"partial unmap changed the right neighbor protection");
*reinterpret_cast<uint64_t*>(base) = 0x4c45465450524f54ull; // "LEFTPROT"
*reinterpret_cast<uint64_t*>(base + SceKernelPageSize * 2) =
0x5247485450524f54ull; // "RGHTPROT"
// Access the neighbors without changing their host permissions first.
auto* left = reinterpret_cast<volatile uint64_t*>(base);
auto* right = reinterpret_cast<volatile uint64_t*>(base + SceKernelPageSize * 2);
*left = 0x4c45465450524f54ull; // "LEFTPROT"
*right = 0x5247485450524f54ull; // "RGHTPROT"
Check(test, *left == 0x4c45465450524f54ull, "partial unmap changed the left neighbor access");
Check(test, *right == 0x5247485450524f54ull, "partial unmap changed the right neighbor access");
CheckOk(test, Libs::LibKernel::Memory::KernelReleaseDirectMemory(phys_addr, size),
"KernelReleaseDirectMemory");