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selftests: kvm/x86: Add the helper function create_pmu_event_filter 

Add a helper function that creates a pmu event filter given an event
list.  Currently, a pmu event filter can only be created with the same
hard coded event list.  Add a way to create one given a different event
list.

Also, rename make_pmu_event_filter to alloc_pmu_event_filter to clarify
it's purpose given the introduction of create_pmu_event_filter.

No functional changes intended.

Signed-off-by: Aaron Lewis <aaronlewis@google.com>
Message-Id: <20220517051238.2566934-2-aaronlewis@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Aaron Lewis 2022-05-17 05:12:37 +00:00 committed by Paolo Bonzini
parent 4ac19ead0d
commit 04baa2233d
1 changed files with 14 additions and 4 deletions
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18
tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
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@ -208,7 +208,7 @@ static bool sanity_check_pmu(struct kvm_vm *vm)
return success;
}
static struct kvm_pmu_event_filter *make_pmu_event_filter(uint32_t nevents)
static struct kvm_pmu_event_filter *alloc_pmu_event_filter(uint32_t nevents)
{
struct kvm_pmu_event_filter *f;
int size = sizeof(*f) + nevents * sizeof(f->events[0]);
@ -220,19 +220,29 @@ static struct kvm_pmu_event_filter *make_pmu_event_filter(uint32_t nevents)
return f;
}
static struct kvm_pmu_event_filter *event_filter(uint32_t action)
static struct kvm_pmu_event_filter *
create_pmu_event_filter(const uint64_t event_list[],
int nevents, uint32_t action)
{
struct kvm_pmu_event_filter *f;
int i;
f = make_pmu_event_filter(ARRAY_SIZE(event_list));
f = alloc_pmu_event_filter(nevents);
f->action = action;
for (i = 0; i < ARRAY_SIZE(event_list); i++)
for (i = 0; i < nevents; i++)
f->events[i] = event_list[i];
return f;
}
static struct kvm_pmu_event_filter *event_filter(uint32_t action)
{
return create_pmu_event_filter(event_list,
ARRAY_SIZE(event_list),
action);
}
/*
* Remove the first occurrence of 'event' (if any) from the filter's
* event list.