cachepc

Prime+Probe cache-based side-channel attack on AMD SEV-SNP protected virtual machines
git clone https://git.sinitax.com/sinitax/cachepc
Log | Files | Refs | Submodules | README | sfeed.txt

loglevel.c (637B)

      1#include "cachepc/uapi.h"
      2
      3#include <sys/ioctl.h>
      4#include <fcntl.h>
      5#include <err.h>
      6#include <fcntl.h>
      7#include <unistd.h>
      8#include <string.h>
      9#include <stdio.h>
     10#include <stdint.h>
     11#include <stdlib.h>
     12
     13int
     14main(int argc, const char **argv)
     15{
     16	uint32_t arg;
     17	int fd, ret;
     18
     19	fd = open("/dev/kvm", O_RDONLY);
     20	if (fd < 0) err(1, "open");
     21
     22	if (argc > 1 && !strcmp(argv[1], "debug"))
     23		arg = CPC_LOGLVL_DBG;
     24	else if (argc > 1 && !strcmp(argv[1], "info"))
     25		arg = CPC_LOGLVL_INFO;
     26	else
     27		arg = 0;
     28
     29	printf("loglevel: %i\n", arg);
     30	ret = ioctl(fd, KVM_CPC_LOGLEVEL, &arg);
     31	if (ret == -1) err(1, "ioctl KVM_CPC_LOGLEVEL");
     32
     33	close(fd);
     34}