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// SPDX-License-Identifier: GPL-2.0-only
#include <stddef.h>
#include <asm/hwprobe.h>
/*
* Rather than relying on having a new enough libc to define this, just do it
* ourselves. This way we don't need to be coupled to a new-enough libc to
* contain the call.
*/
long riscv_hwprobe(struct riscv_hwprobe *pairs, size_t pair_count,
size_t cpu_count, unsigned long *cpus, unsigned int flags);
int main(int argc, char **argv)
{
struct riscv_hwprobe pairs[8];
unsigned long cpus;
long out;
/* Fake the CPU_SET ops. */
cpus = -1;
/*
* Just run a basic test: pass enough pairs to get up to the base
* behavior, and then check to make sure it's sane.
*/
for (long i = 0; i < 8; i++)
pairs[i].key = i;
out = riscv_hwprobe(pairs, 8, 1, &cpus, 0);
if (out != 0)
return -1;
for (long i = 0; i < 4; ++i) {
/* Fail if the kernel claims not to recognize a base key. */
if ((i < 4) && (pairs[i].key != i))
return -2;
if (pairs[i].key != RISCV_HWPROBE_KEY_BASE_BEHAVIOR)
continue;
if (pairs[i].value & RISCV_HWPROBE_BASE_BEHAVIOR_IMA)
continue;
return -3;
}
/*
* This should also work with a NULL CPU set, but should not work
* with an improperly supplied CPU set.
*/
out = riscv_hwprobe(pairs, 8, 0, 0, 0);
if (out != 0)
return -4;
out = riscv_hwprobe(pairs, 8, 0, &cpus, 0);
if (out == 0)
return -5;
out = riscv_hwprobe(pairs, 8, 1, 0, 0);
if (out == 0)
return -6;
/*
* Check that keys work by providing one that we know exists, and
* checking to make sure the resultig pair is what we asked for.
*/
pairs[0].key = RISCV_HWPROBE_KEY_BASE_BEHAVIOR;
out = riscv_hwprobe(pairs, 1, 1, &cpus, 0);
if (out != 0)
return -7;
if (pairs[0].key != RISCV_HWPROBE_KEY_BASE_BEHAVIOR)
return -8;
/*
* Check that an unknown key gets overwritten with -1,
* but doesn't block elements after it.
*/
pairs[0].key = 0x5555;
pairs[1].key = 1;
pairs[1].value = 0xAAAA;
out = riscv_hwprobe(pairs, 2, 0, 0, 0);
if (out != 0)
return -9;
if (pairs[0].key != -1)
return -10;
if ((pairs[1].key != 1) || (pairs[1].value == 0xAAAA))
return -11;
return 0;
}
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