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selftests/powerpc/dexcr: Add hashst/hashchk test

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Test the kernel DEXCR[NPHIE] interface and hashchk exception handling.

Introduces with it a DEXCR utils library for common DEXCR operations.

Volatile is used to prevent the compiler optimising away the signal
tests.

Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230616034846.311705-11-bgray@linux.ibm.com
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Benjamin Gray 2023-06-19 17:36:27 +10:00 • committed by Michael Ellerman
commit bdb07f35a5
9 changed files with 449 additions and 0 deletions
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