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Code Issues Releases Wiki Activity

Detect Virtual Machine

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Fix #90
This commit is contained in:
Xorg 2022-09-15 21:24:43 +02:00
parent ab395f8756
commit ff5aafb5f4
5 changed files with 137 additions and 0 deletions
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37
cpuid_tool/cpuid_tool.c
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@ -108,6 +108,7 @@ int need_input = 0,
need_version = 0,
need_cpulist = 0,
need_sgx = 0,
need_hypervisor = 0,
need_identify = 0;
#define MAX_REQUESTS 32
@ -178,6 +179,7 @@ static void usage(void)
printf(" --clock-rdtsc - same as --clock, but use RDTSC for clock detection\n");
printf(" --cpulist - list all known CPUs\n");
printf(" --sgx - list SGX leaf data, if SGX is supported.\n");
printf(" --hypervisor - print hypervisor vendor if detected.\n");
printf(" --quiet - disable warnings\n");
printf(" --outfile=<file> - redirect all output to this file, instead of stdout\n");
printf(" --verbose, -v - be extra verbose (more keys increase verbosiness level)\n");
@ -297,6 +299,11 @@ static int parse_cmdline(int argc, char** argv)
need_identify = 1;
recog = 1;
}
if (!strcmp(arg, "--hypervisor")) {
need_hypervisor = 1;
need_identify = 1;
recog = 1;
}
if (arg[0] == '-' && arg[1] == 'v') {
num_vs = 1;
while (arg[num_vs] == 'v')
@ -556,6 +563,33 @@ static void print_sgx_data(const struct cpu_raw_data_t* raw, const struct cpu_id
}
}
static void print_hypervisor(struct cpu_raw_data_t* raw, struct cpu_id_t* data)
{
int i;
const char *hypervisor_str = NULL;
const hypervisor_vendor_t hypervisor = cpuid_get_hypervisor(raw, data);
const struct { const char *name; hypervisor_vendor_t hypervisor; } hypervisors_vendors[NUM_HYPERVISOR_VENDORS] = {
{ "none", HYPERVISOR_NONE },
{ "FreeBSD bhyve", HYPERVISOR_BHYVE },
{ "Microsoft Hyper-V ", HYPERVISOR_HYPERV },
{ "KVM", HYPERVISOR_KVM },
{ "Parallels", HYPERVISOR_PARALLELS },
{ "QEMU", HYPERVISOR_QEMU },
{ "VirtualBox", HYPERVISOR_VIRTUALBOX },
{ "VMware", HYPERVISOR_VMWARE },
{ "Xen", HYPERVISOR_XEN },
};
for (i = 0; i < NUM_HYPERVISOR_VENDORS; i++)
if (hypervisors_vendors[i].hypervisor == hypervisor) {
hypervisor_str = hypervisors_vendors[i].name;
break;
}
fprintf(fout, "Hypervisor vendor: %s\n", (hypervisor_str == NULL) ? "unknown" : hypervisor_str);
if (hypervisor == HYPERVISOR_NONE)
fprintf(fout, "Caution: no hypervisor detected from CPUID bits, but a hypervisor may be hidden.\n"
"Refer to https://github.com/anrieff/libcpuid/issues/90#issuecomment-296568713\n");
}
int main(int argc, char** argv)
{
int parseres = parse_cmdline(argc, argv);
@ -762,6 +796,9 @@ int main(int argc, char** argv)
if (need_sgx) {
print_sgx_data(&raw_array.raw[0], &data.cpu_types[0]);
}
if (need_hypervisor) {
print_hypervisor(&raw_array.raw[0], &data.cpu_types[0]);
}
cpuid_free_raw_data_array(&raw_array);
cpuid_free_system_id(&data);