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9f0fa21379
BRBE emits IRQ and ERET branches for branching and returning from trapped instructions. Add a test that loops on a trapped instruction (MRS - Read special register) for this. Extend the expected 'any_call' branches to include FAULT_DATA and FAULT_INST as these are emitted by BRBE. Reviewed-by: Ian Rogers <irogers@google.com> Co-developed-by: German Gomez <german.gomez@arm.com> Signed-off-by: German Gomez <german.gomez@arm.com> Signed-off-by: James Clark <james.clark@linaro.org> Cc: Adam Young <admiyo@os.amperecomputing.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rob Herring <robh@kernel.org> Cc: Will Deacon <will@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
32 lines
514 B
C
32 lines
514 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <stdlib.h>
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#include "../tests.h"
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#define BENCH_RUNS 999999
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#ifdef __aarch64__
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static void trap_bench(void)
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{
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unsigned long val;
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asm("mrs %0, ID_AA64ISAR0_EL1" : "=r" (val)); /* TRAP + ERET */
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}
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#else
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static void trap_bench(void) { }
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#endif
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static int traploop(int argc, const char **argv)
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{
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int num_loops = BENCH_RUNS;
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if (argc > 0)
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num_loops = atoi(argv[0]);
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for (int i = 0; i < num_loops; i++)
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trap_bench();
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return 0;
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}
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DEFINE_WORKLOAD(traploop);
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