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selftests/powerpc/64: Test exception cases in copy_tofrom_user

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This adds a set of test cases to test the behaviour of
copy_tofrom_user when exceptions are encountered accessing the
source or destination.  Currently, copy_tofrom_user does not always
copy as many bytes as possible when an exception occurs on a store
to the destination, and that is reflected in failures in these tests.

Based on a test program from Anton Blanchard.

[paulus@ozlabs.org - test all three paths, wrote commit description,
 made EX_TABLE create an exception table.]

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Ellerman
2018-08-03 20:13:05 +10:00
parent 98c45f51f7
commit 2679f63fe5
6 changed files with 188 additions and 21 deletions
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3
tools/testing/selftests/powerpc/copyloops/.gitignore vendored
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@@ -8,3 +8,6 @@ memcpy_64_t1
memcpy_64_t2
memcpy_power7_t0
memcpy_power7_t1
copyuser_64_exc_t0
copyuser_64_exc_t1
copyuser_64_exc_t2