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| author | Bharat Bhushan <r65777@freescale.com> | 2013-11-15 11:01:15 +0530 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-01-09 10:15:07 +0100 |
| commit | f5e3fe091f5238459752a81b478398b7cb22e575 (patch) | |
| tree | 89cd631e5516c316611fac1008553d5ca8cabb90 /arch/powerpc/include/asm/pgtable.h | |
| parent | 7c85e6b39ce880869929958bd7b95f72db03a9af (diff) | |
| download | blackbird-op-linux-f5e3fe091f5238459752a81b478398b7cb22e575.tar.gz blackbird-op-linux-f5e3fe091f5238459752a81b478398b7cb22e575.zip | |
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>
Diffstat (limited to 'arch/powerpc/include/asm/pgtable.h')
| -rw-r--r-- | arch/powerpc/include/asm/pgtable.h | 21 |
1 files changed, 21 insertions, 0 deletions
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__ */ |
