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Commit f5e3fe09 authored by Bharat Bhushan's avatar Bharat Bhushan Committed by Alexander Graf
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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: default avatarBharat Bhushan <bharat.bhushan@freescale.com>
Reviewed-by: default avatarScott Wood <scottwood@freescale.com>
Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent 7c85e6b3

arch/powerpc/include/asm/pgtable.h

+21 −0
Original line number Diff line number Diff line
@@ -223,6 +223,27 @@ extern int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr, 
#endif

pte_t *find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea,

				 unsigned *shift);



static inline pte_t *lookup_linux_ptep(pgd_t *pgdir, unsigned long hva,

				     unsigned long *pte_sizep)

{

	pte_t *ptep;

	unsigned long ps = *pte_sizep;

	unsigned int shift;



	ptep = find_linux_pte_or_hugepte(pgdir, hva, &shift);

	if (!ptep)

		return NULL;

	if (shift)

		*pte_sizep = 1ul << shift;

	else

		*pte_sizep = PAGE_SIZE;



	if (ps > *pte_sizep)

		return NULL;



	return ptep;

}

#endif /* __ASSEMBLY__ */



#endif /* __KERNEL__ */