From f5e3fe091f5238459752a81b478398b7cb22e575 Mon Sep 17 00:00:00 2001 From: Bharat Bhushan Date: Fri, 15 Nov 2013 11:01:15 +0530 Subject: [PATCH] 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 Reviewed-by: Scott Wood Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/pgtable.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h index 7d6eacf249cf..b60ceb8d86c8 100644 --- a/arch/powerpc/include/asm/pgtable.h +++ b/arch/powerpc/include/asm/pgtable.h @@ -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__ */ -- 2.20.1