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| author | Florian Weimer <fweimer@redhat.com> | 2020-05-11 11:20:02 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2020-05-11 16:11:47 +0200 |
| commit | e627106266ad8785457fadbf5bf67ed604d2a353 (patch) | |
| tree | 39296463b2d7b64c06c672fecfbe64bc9a1bfeef /io | |
| parent | 61416e19218605a54e94edd9740bbe9d2785af6d (diff) | |
| download | glibc-e627106266ad8785457fadbf5bf67ed604d2a353.zip glibc-e627106266ad8785457fadbf5bf67ed604d2a353.tar.gz glibc-e627106266ad8785457fadbf5bf67ed604d2a353.tar.bz2 | |
POWER: Add context-synchronizing instructions to pkey_write [BZ #25954]
Sandipan Das reported that,
"The Power ISA mandates that all writes to the Authority
Mask Register (AMR) must always be preceded as well as
succeeded by a context-synchronizing instruction. This
applies to both the privileged and unprivileged variants
of the Move To AMR instruction.
This [requirement] is from Table 6 of Chapter 11 in page 1134 of Power
ISA 3.0B. The document can be found here:
<https://ibm.ent.box.com/s/1hzcwkwf8rbju5h9iyf44wm94amnlcrv>
"
See this kernel patch submission:
<https://lore.kernel.org/linuxppc-dev/5f65cf37be993760de8112a88da194e3ccbb2bf8.1588959697.git.sandipan@linux.ibm.com/>
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