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Implement TLB flushing for cache attribute changes during page removal
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This commit is contained in:
Aiken Harris
2026-03-25 13:24:44 +01:00
parent a79f26250a
commit e734ddda65
4 changed files with 23 additions and 4 deletions
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8
xtoskrnl/mm/pfn.cc
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@@ -191,7 +191,8 @@ MM::Pfn::DecrementReferenceCount(IN PMMPFN PageFrameNumber,
if((PageFrameNumber->u3.e1.CacheAttribute != PfnCached) &&
(PageFrameNumber->u3.e1.CacheAttribute != PfnNotMapped))
{
UNIMPLEMENTED;
/* Flush the TLB to prevent cache attribute conflicts from stale non-cached mappings */
MM::Paging::FlushEntireTlb();
}
/* The page is no longer needed, free it by linking it to the free list */
@@ -288,7 +289,7 @@ MM::Pfn::DecrementShareCount(IN PMMPFN PageFrameNumber,
if(PageFrameNumber->u3.e2.ReferenceCount == 1)
{
/* Check if the PTE is marked as being ready for removal */
if(MM::Paging::GetPte(PageFrameNumber->PteAddress) & 0x1)
if((ULONG_PTR)PageFrameNumber->PteAddress & 0x1)
{
/* Reset the reference count */
PageFrameNumber->u3.e2.ReferenceCount = 0;
@@ -297,7 +298,8 @@ MM::Pfn::DecrementShareCount(IN PMMPFN PageFrameNumber,
if((PageFrameNumber->u3.e1.CacheAttribute != PfnCached) &&
(PageFrameNumber->u3.e1.CacheAttribute != PfnNotMapped))
{
UNIMPLEMENTED;
/* Flush the TLB to prevent cache attribute conflicts from stale non-cached mappings */
MM::Paging::FlushEntireTlb();
}
/* Mark the page as active and valid again */