kvm: powerpc: define a linux pte lookup function
We need to search linux "pte" to get "pte" attributes for setting TLB in KVM. This patch defines a lookup_linux_ptep() function which returns pte pointer. Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> Reviewed-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
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@ -223,6 +223,27 @@ extern int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr,
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#endif
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pte_t *find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea,
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unsigned *shift);
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static inline pte_t *lookup_linux_ptep(pgd_t *pgdir, unsigned long hva,
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unsigned long *pte_sizep)
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{
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pte_t *ptep;
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unsigned long ps = *pte_sizep;
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unsigned int shift;
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ptep = find_linux_pte_or_hugepte(pgdir, hva, &shift);
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if (!ptep)
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return NULL;
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if (shift)
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*pte_sizep = 1ul << shift;
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else
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*pte_sizep = PAGE_SIZE;
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if (ps > *pte_sizep)
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return NULL;
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return ptep;
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}
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#endif /* __ASSEMBLY__ */
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#endif /* __KERNEL__ */
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