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/* This file is part of msrtool. */
/* SPDX-License-Identifier: GPL-2.0-only */
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include "msrtool.h"
static int msr_fd[MAX_CORES] = {-1, -1, -1, -1, -1, -1, -1, -1};
int freebsd_probe(const struct sysdef *system)
{
#ifdef __FreeBSD__
struct stat st;
return stat("/dev/cpuctl0", &st) == 0;
#else
return 0;
#endif
}
int freebsd_open(uint8_t cpu, enum SysModes mode)
{
#ifdef __FreeBSD__
int flags;
char devname[32];
if (cpu >= MAX_CORES)
return 0;
if (SYS_RDWR == mode)
flags = O_RDWR;
else if (SYS_WRONLY == mode)
flags = O_WRONLY;
else
flags = O_RDONLY;
snprintf(devname, sizeof(devname), "/dev/cpuctl%u", cpu);
msr_fd[cpu] = open(devname, flags);
if (msr_fd[cpu] < 0) {
perror(devname);
return 0;
}
return 1;
#else
return 0;
#endif
}
int freebsd_close(uint8_t cpu)
{
if (cpu >= MAX_CORES)
return 0;
if (msr_fd[cpu] != -1)
close(msr_fd[cpu]);
msr_fd[cpu] = -1;
return 1;
}
int freebsd_rdmsr(uint8_t cpu, uint32_t addr, struct msr *val)
{
#ifdef __FreeBSD__
cpuctl_msr_args_t args;
if (cpu >= MAX_CORES)
return 0;
if (msr_fd[cpu] < 0)
return 0;
args.msr = addr;
if (ioctl(msr_fd[cpu], CPUCTL_RDMSR, &args) < 0) {
perror("ioctl(CPUCTL_RDMSR)");
return 0;
}
val->hi = args.data >> 32;
val->lo = args.data & 0xffffffff;
return 1;
#else
return 0;
#endif
}
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