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KVM: ARM: Remove pgtable page standard functions from stage-2 page tables

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ARM64 standard pgtable functions are going to use pgtable_page_[ctor|dtor]
or pgtable_pmd_page_[ctor|dtor] constructs. At present KVM guest stage-2
PUD|PMD|PTE level page tabe pages are allocated with __get_free_page()
via mmu_memory_cache_alloc() but released with standard pud|pmd_free() or
pte_free_kernel(). These will fail once they start calling into pgtable_
[pmd]_page_dtor() for pages which never originally went through respective
constructor functions. Hence convert all stage-2 page table page release
functions to call buddy directly while freeing pages.

Reviewed-by: Suzuki K Poulose <[email protected]>
Acked-by: Yu Zhao <[email protected]>
Acked-by: Marc Zyngier <[email protected]>
Signed-off-by: Anshuman Khandual <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
This commit is contained in:
Anshuman Khandual 2019-03-12 18:55:45 +05:30 • committed by Will Deacon
commit 14b94d0757
3 changed files with 5 additions and 5 deletions
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2
virt/kvm/arm/mmu.c
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@ -189,7 +189,7 @@ static void clear_stage2_pmd_entry(struct kvm *kvm, pmd_t *pmd, phys_addr_t addr
VM_BUG_ON(pmd_thp_or_huge(*pmd));
pmd_clear(pmd);
kvm_tlb_flush_vmid_ipa(kvm, addr);
pte_free_kernel(NULL, pte_table);
free_page((unsigned long)pte_table);
put_page(virt_to_page(pmd));
}