diff options
| author | Bharat Bhushan <r65777@freescale.com> | 2013-11-15 05:31:15 (GMT) |
|---|---|---|
| committer | Jose Rivera <German.Rivera@freescale.com> | 2014-05-07 21:54:38 (GMT) |
| commit | f179d8716859a0689008ea3b866dbb6b0589efbf (patch) | |
| tree | accc29c114fdeb0a35b03face539c112853b6d53 /arch | |
| parent | 07e8b4af4b1998cd62538b6c5ee7bb13c5c22fda (diff) | |
| download | linux-fsl-qoriq-f179d8716859a0689008ea3b866dbb6b0589efbf.tar.xz | |
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>
Change-Id: Idaae1def20e8c12dc1245252ddf6d7ccea60c76d
Reviewed-on: http://git.am.freescale.net:8181/11890
Tested-by: Review Code-CDREVIEW <CDREVIEW@freescale.com>
Reviewed-by: Stuart Yoder <stuart.yoder@freescale.com>
Reviewed-by: Jose Rivera <German.Rivera@freescale.com>
Diffstat (limited to 'arch')
| -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 0459077..9814871 100644 --- a/arch/powerpc/include/asm/pgtable.h +++ b/arch/powerpc/include/asm/pgtable.h @@ -230,6 +230,27 @@ 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__ */ |