diff options
| author | Aaron Lindsay OS <aaron@os.amperecomputing.com> | 2019-01-29 11:46:04 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2019-01-29 11:46:04 +0000 |
| commit | bf8d09694ccc07487cd73d7562081fdaec3370c8 (patch) | |
| tree | b03ad93fc25b3a9fcb6d88933d015ea36ffcf018 /target/arm/cpu.h | |
| parent | c8de3f5fd696db0e0a16062de4b9c75252401e4e (diff) | |
target/arm: Don't clear supported PMU events when initializing PMCEID1
A bug was introduced during a respin of:
commit 57a4a11b2b281bb548b419ca81bfafb214e4c77a
target/arm: Add array for supported PMU events, generate PMCEID[01]_EL0
This patch introduced two calls to get_pmceid() during CPU
initialization - one each for PMCEID0 and PMCEID1. In addition to
building the register values, get_pmceid() clears an internal array
mapping event numbers to their implementations (supported_event_map)
before rebuilding it. This is an optimization since much of the logic is
shared. However, since it was called twice, the contents of
supported_event_map reflect only the events in PMCEID1 (the second call
to get_pmceid()).
Fix this bug by moving the initialization of PMCEID0 and PMCEID1 back
into a single function call, and name it more appropriately since it is
doing more than simply generating the contents of the PMCEID[01]
registers.
Signed-off-by: Aaron Lindsay <aaron@os.amperecomputing.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190123195814.29253-1-aaron@os.amperecomputing.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm/cpu.h')
| -rw-r--r-- | target/arm/cpu.h | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/target/arm/cpu.h b/target/arm/cpu.h index ff81db420d..b8161cb6d7 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -1012,14 +1012,13 @@ void pmu_pre_el_change(ARMCPU *cpu, void *ignored); void pmu_post_el_change(ARMCPU *cpu, void *ignored); /* - * get_pmceid - * @env: CPUARMState - * @which: which PMCEID register to return (0 or 1) + * pmu_init + * @cpu: ARMCPU * - * Return the PMCEID[01]_EL0 register values corresponding to the counters - * which are supported given the current configuration + * Initialize the CPU's PMCEID[01]_EL0 registers and associated internal state + * for the current configuration */ -uint64_t get_pmceid(CPUARMState *env, unsigned which); +void pmu_init(ARMCPU *cpu); /* SCTLR bit meanings. Several bits have been reused in newer * versions of the architecture; in that case we define constants |