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| author | Shivaprasad G Bhat <sbhat@linux.ibm.com> | 2021-03-29 13:36:43 -0400 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-04-14 23:04:07 +1000 |
| commit | 75b7c05ebf902632f7f540c3eb0a8945c2d74aab (patch) | |
| tree | d3150b2c37b1363fc329a406c9988c25e5eef728 /LICENSES | |
| parent | af072b1a9d4d9edc24da84a071b0671e147026cb (diff) | |
| download | linux-next-75b7c05ebf902632f7f540c3eb0a8945c2d74aab.tar.gz | |
powerpc/papr_scm: Implement support for H_SCM_FLUSH hcall
Add support for ND_REGION_ASYNC capability if the device tree
indicates 'ibm,hcall-flush-required' property in the NVDIMM node.
Flush is done by issuing H_SCM_FLUSH hcall to the hypervisor.
If the flush request failed, the hypervisor is expected to
to reflect the problem in the subsequent nvdimm H_SCM_HEALTH call.
This patch prevents mmap of namespaces with MAP_SYNC flag if the
nvdimm requires an explicit flush[1].
References:
[1] https://github.com/avocado-framework-tests/avocado-misc-tests/blob/master/memory/ndctl.py.data/map_sync.c
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
[mpe: Use unsigned long / long instead of uint64_t/int64_t]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/161703936121.36.7260632399582101498.stgit@e1fbed493c87
Diffstat (limited to 'LICENSES')
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