mirror of https://github.com/torvalds/linux.git
79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "../../../kselftest.h"
|
|
#include <libvfio.h>
|
|
|
|
static bool is_bdf(const char *str)
|
|
{
|
|
unsigned int s, b, d, f;
|
|
int length, count;
|
|
|
|
count = sscanf(str, "%4x:%2x:%2x.%2x%n", &s, &b, &d, &f, &length);
|
|
return count == 4 && length == strlen(str);
|
|
}
|
|
|
|
static char **get_bdfs_cmdline(int *argc, char *argv[], int *nr_bdfs)
|
|
{
|
|
int i;
|
|
|
|
for (i = *argc - 1; i > 0 && is_bdf(argv[i]); i--)
|
|
continue;
|
|
|
|
i++;
|
|
*nr_bdfs = *argc - i;
|
|
*argc -= *nr_bdfs;
|
|
|
|
return *nr_bdfs ? &argv[i] : NULL;
|
|
}
|
|
|
|
static char *get_bdf_env(void)
|
|
{
|
|
char *bdf;
|
|
|
|
bdf = getenv("VFIO_SELFTESTS_BDF");
|
|
if (!bdf)
|
|
return NULL;
|
|
|
|
VFIO_ASSERT_TRUE(is_bdf(bdf), "Invalid BDF: %s\n", bdf);
|
|
return bdf;
|
|
}
|
|
|
|
char **vfio_selftests_get_bdfs(int *argc, char *argv[], int *nr_bdfs)
|
|
{
|
|
static char *env_bdf;
|
|
char **bdfs;
|
|
|
|
bdfs = get_bdfs_cmdline(argc, argv, nr_bdfs);
|
|
if (bdfs)
|
|
return bdfs;
|
|
|
|
env_bdf = get_bdf_env();
|
|
if (env_bdf) {
|
|
*nr_bdfs = 1;
|
|
return &env_bdf;
|
|
}
|
|
|
|
fprintf(stderr, "Unable to determine which device(s) to use, skipping test.\n");
|
|
fprintf(stderr, "\n");
|
|
fprintf(stderr, "To pass the device address via environment variable:\n");
|
|
fprintf(stderr, "\n");
|
|
fprintf(stderr, " export VFIO_SELFTESTS_BDF=\"segment:bus:device.function\"\n");
|
|
fprintf(stderr, " %s [options]\n", argv[0]);
|
|
fprintf(stderr, "\n");
|
|
fprintf(stderr, "To pass the device address(es) via argv:\n");
|
|
fprintf(stderr, "\n");
|
|
fprintf(stderr, " %s [options] segment:bus:device.function ...\n", argv[0]);
|
|
fprintf(stderr, "\n");
|
|
exit(KSFT_SKIP);
|
|
}
|
|
|
|
const char *vfio_selftests_get_bdf(int *argc, char *argv[])
|
|
{
|
|
int nr_bdfs;
|
|
|
|
return vfio_selftests_get_bdfs(argc, argv, &nr_bdfs)[0];
|
|
}
|