diff options
| author |   Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2016-04-29 23:25:24 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2016-05-01 18:32:13 +1000 |
| commit | 8ffb4103f5e28d7e7890ed4774d8e009f253f56e (patch) | |
| tree | ff1ac82b4edb32fbda14adae78a034f2240ee8bf /drivers/infiniband/hw/qib/qib_file_ops.c | |
| parent | powerpc/perf: Replace raw event hex values with #defines (diff) | |
| download | linux-dev-8ffb4103f5e28d7e7890ed4774d8e009f253f56e.tar.xz linux-dev-8ffb4103f5e28d7e7890ed4774d8e009f253f56e.zip | |
IB/qib: Use cache inhibitted and guarded mapping on powerpc
The driver was requesting for a writethrough mapping. But with those
flags we will end up with an SAO mapping because we now have memory
conherence always enabled. ie, the existing mapping will end up with a
WIMG value 0b1110 which is Strong Access Order.
Update this to use cache inhibitted guarded mapping.
Cc: Doug Ledford <dledford@redhat.com>
Cc: Sean Hefty <sean.hefty@intel.com>
Cc: Hal Rosenstock <hal.rosenstock@gmail.com>
Cc: linux-rdma@vger.kernel.org
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/infiniband/hw/qib/qib_file_ops.c')
| -rw-r--r-- | drivers/infiniband/hw/qib/qib_file_ops.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/drivers/infiniband/hw/qib/qib_file_ops.c b/drivers/infiniband/hw/qib/qib_file_ops.c index e449e394963f..a3d593f546ec 100644 --- a/drivers/infiniband/hw/qib/qib_file_ops.c +++ b/drivers/infiniband/hw/qib/qib_file_ops.c @@ -822,10 +822,7 @@ static int mmap_piobufs(struct vm_area_struct *vma, phys = dd->physaddr + piobufs; #if defined(__powerpc__) - /* There isn't a generic way to specify writethrough mappings */ - pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; - pgprot_val(vma->vm_page_prot) |= _PAGE_WRITETHRU; - pgprot_val(vma->vm_page_prot) &= ~_PAGE_GUARDED; + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); #endif /* |