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selftests/powerpc: Do not fail with reschedule

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There are cases where the test is not expecting to have the transaction
aborted, but, the test process might have been rescheduled, either in the
OS level or by KVM (if it is running on a KVM guest machine). The process
reschedule will cause a treclaim/recheckpoint which will cause the
transaction to doom, aborting the transaction as soon as the process is
rescheduled back to the CPU. This might cause the test to fail, but this is
not a failure in essence.

If that is the case, TEXASR[FC] is indicated with either
TM_CAUSE_RESCHEDULE or TM_CAUSE_KVM_RESCHEDULE for KVM interruptions.

In this scenario, ignore these two failures and avoid the whole test to
return failure.

Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Gustavo Romero <gromero@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Breno Leitao
2018-09-12 17:31:05 -03:00
committed by Michael Ellerman
parent 984ecdd68d
commit 44d947eff1
2 changed files with 15 additions and 3 deletions
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9
tools/testing/selftests/powerpc/tm/tm.h
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@@ -52,6 +52,15 @@ static inline bool failure_is_unavailable(void)
return (failure_code() & TM_CAUSE_FAC_UNAV) == TM_CAUSE_FAC_UNAV;
}
static inline bool failure_is_reschedule(void)
{
if ((failure_code() & TM_CAUSE_RESCHED) == TM_CAUSE_RESCHED ||
(failure_code() & TM_CAUSE_KVM_RESCHED) == TM_CAUSE_KVM_RESCHED)
return true;
return false;
}
static inline bool failure_is_nesting(void)
{
return (__builtin_get_texasru() & 0x400000);