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a29e2a48af
Add hwprobe test for Zicboz and its block size. Also, when Zicboz is present, test that cbo.zero may be issued and works. Additionally provide a command line option that enables testing that the Zicbom instructions cause SIGILL and also that cbo.zero causes SIGILL when Zicboz it's not present. The SIGILL tests require "opt-in" with a command line option because the RISC-V ISA does not require unimplemented standard opcodes to issue illegal-instruction exceptions (but hopefully most platforms do). Pinning the test to a subset of cpus with taskset will also restrict the hwprobe calls to that set. Signed-off-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Xiao Wang <xiao.w.wang@intel.com> Link: https://lore.kernel.org/r/20230918131518.56803-14-ajones@ventanamicro.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include "hwprobe.h"
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#include "../../kselftest.h"
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int main(int argc, char **argv)
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{
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struct riscv_hwprobe pairs[8];
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unsigned long cpus;
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long out;
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ksft_print_header();
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ksft_set_plan(5);
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/* Fake the CPU_SET ops. */
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cpus = -1;
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/*
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* Just run a basic test: pass enough pairs to get up to the base
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* behavior, and then check to make sure it's sane.
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*/
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for (long i = 0; i < 8; i++)
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pairs[i].key = i;
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out = riscv_hwprobe(pairs, 8, 1, &cpus, 0);
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if (out != 0)
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ksft_exit_fail_msg("hwprobe() failed with %ld\n", out);
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for (long i = 0; i < 4; ++i) {
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/* Fail if the kernel claims not to recognize a base key. */
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if ((i < 4) && (pairs[i].key != i))
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ksft_exit_fail_msg("Failed to recognize base key: key != i, "
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"key=%ld, i=%ld\n", pairs[i].key, i);
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if (pairs[i].key != RISCV_HWPROBE_KEY_BASE_BEHAVIOR)
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continue;
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if (pairs[i].value & RISCV_HWPROBE_BASE_BEHAVIOR_IMA)
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continue;
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ksft_exit_fail_msg("Unexpected pair: (%ld, %ld)\n", pairs[i].key, pairs[i].value);
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}
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out = riscv_hwprobe(pairs, 8, 0, 0, 0);
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ksft_test_result(out == 0, "NULL CPU set\n");
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out = riscv_hwprobe(pairs, 8, 0, &cpus, 0);
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ksft_test_result(out != 0, "Bad CPU set\n");
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out = riscv_hwprobe(pairs, 8, 1, 0, 0);
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ksft_test_result(out != 0, "NULL CPU set with non-zero count\n");
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pairs[0].key = RISCV_HWPROBE_KEY_BASE_BEHAVIOR;
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out = riscv_hwprobe(pairs, 1, 1, &cpus, 0);
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ksft_test_result(out == 0 && pairs[0].key == RISCV_HWPROBE_KEY_BASE_BEHAVIOR,
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"Existing key is maintained\n");
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pairs[0].key = 0x5555;
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pairs[1].key = 1;
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pairs[1].value = 0xAAAA;
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out = riscv_hwprobe(pairs, 2, 0, 0, 0);
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ksft_test_result(out == 0 && pairs[0].key == -1 &&
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pairs[1].key == 1 && pairs[1].value != 0xAAAA,
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"Unknown key overwritten with -1 and doesn't block other elements\n");
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ksft_finished();
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}
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