LoongArch: KVM: Mark page accessed and dirty with page ref added

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Function kvm_map_page_fast() is fast path of secondary mmu page fault
flow, pfn is parsed from secondary mmu page table walker. However the
corresponding page reference is not added, it is dangerious to access
page out of mmu_lock.

Here page ref is added inside mmu_lock, function kvm_set_pfn_accessed()
and kvm_set_pfn_dirty() is called with page ref added, so that the page
will not be freed by others.

Also kvm_set_pfn_accessed() is removed here since it is called in the
following function kvm_release_pfn_clean().

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

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Bibo Mao 2024-07-09 16:25:51 +08:00 • committed by Huacai Chen

parent 8c34704252

commit ebf00272da

1 changed files with 13 additions and 10 deletions

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arch/loongarch/kvm/mmu.c

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