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Assert that group0/group1 counter config is what we expect

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Before suspend the AMU counters should be enabled and after resume
they should be disabled.  Assert that to be consistent with the
AArch64 implementation of `amu_context_{save,restore}()`.

Change-Id: Ia46f77e4062b93afb93721a2890a9b9d2a7f300e
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>
This commit is contained in:
Dimitris Papastamos
2018-02-20 11:16:44 +00:00
parent 2ff8fbf3b0
commit e6e17ee8f1
1 changed files with 3 additions and 2 deletions
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5
lib/extensions/amu/aarch32/amu.c
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@@ -109,7 +109,8 @@ static void *amu_context_save(const void *arg)
ctx = &amu_ctxs[plat_my_core_pos()];
/* Assert that group 0 counter configuration is what we expect */
assert(read_amcntenset0() == AMU_GROUP0_COUNTERS_MASK);
assert(read_amcntenset0() == AMU_GROUP0_COUNTERS_MASK &&
read_amcntenset1() == AMU_GROUP1_COUNTERS_MASK);
/*
* Disable group 0 counters to avoid other observers like SCP sampling
@@ -141,7 +142,7 @@ static void *amu_context_restore(const void *arg)
ctx = &amu_ctxs[plat_my_core_pos()];
/* Counters were disabled in `amu_context_save()` */
assert(read_amcntenset0() == 0);
assert(read_amcntenset0() == 0 && read_amcntenset1() == 0);
/* Restore group 0 counters */
for (i = 0; i < AMU_GROUP0_NR_COUNTERS; i++)