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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 makes sure that the tests follow this requirement when attempting to update a pkey's access rights. Signed-off-by: Sandipan Das <sandipan@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200604125610.649668-2-sandipan@linux.ibm.com |
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