diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2015-12-01 04:36:59 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-12-14 05:19:17 +0100 |
| commit | 4ad90c864989337e7946f456478b6417325689d0 (patch) | |
| tree | 468b25b8e496092ad8f32db383455f8f9261fbca /arch/powerpc/include | |
| parent | powerpc/nohash: we don't use real_pte_t for nohash (diff) | |
| download | linux-4ad90c864989337e7946f456478b6417325689d0.tar.xz linux-4ad90c864989337e7946f456478b6417325689d0.zip | |
powerpc/mm: Use H_READ with H_READ_4
This will bulk read 4 hash pte slot entries and should reduce the loop
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/plpar_wrappers.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/plpar_wrappers.h b/arch/powerpc/include/asm/plpar_wrappers.h index 67859edbf8fd..1b394247afc2 100644 --- a/arch/powerpc/include/asm/plpar_wrappers.h +++ b/arch/powerpc/include/asm/plpar_wrappers.h @@ -202,6 +202,23 @@ static inline long plpar_pte_read_raw(unsigned long flags, unsigned long ptex, } /* + * ptes must be 8*sizeof(unsigned long) + */ +static inline long plpar_pte_read_4(unsigned long flags, unsigned long ptex, + unsigned long *ptes) + +{ + long rc; + unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; + + rc = plpar_hcall9(H_READ, retbuf, flags | H_READ_4, ptex); + + memcpy(ptes, retbuf, 8*sizeof(unsigned long)); + + return rc; +} + +/* * plpar_pte_read_4_raw can be called in real mode. * ptes must be 8*sizeof(unsigned long) */ |