1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2017 Mellanox Technologies, Ltd
3 */
4
5 #include "rte_hypervisor.h"
6
7 #include <stdint.h>
8 #include <string.h>
9
10 #include "rte_cpuflags.h"
11 #include "rte_cpuid.h"
12
13 /* See http://lwn.net/Articles/301888/ */
14 #define HYPERVISOR_INFO_LEAF 0x40000000
15
16 enum rte_hypervisor
rte_hypervisor_get(void)17 rte_hypervisor_get(void)
18 {
19 cpuid_registers_t regs;
20 int reg;
21 char name[13];
22
23 if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_HYPERVISOR))
24 return RTE_HYPERVISOR_NONE;
25
26 __cpuid(HYPERVISOR_INFO_LEAF,
27 regs[RTE_REG_EAX], regs[RTE_REG_EBX],
28 regs[RTE_REG_ECX], regs[RTE_REG_EDX]);
29 for (reg = 1; reg < 4; reg++)
30 memcpy(name + (reg - 1) * 4, ®s[reg], 4);
31 name[12] = '\0';
32
33 if (strcmp("KVMKVMKVM", name) == 0)
34 return RTE_HYPERVISOR_KVM;
35 if (strcmp("Microsoft Hv", name) == 0)
36 return RTE_HYPERVISOR_HYPERV;
37 if (strcmp("VMwareVMware", name) == 0)
38 return RTE_HYPERVISOR_VMWARE;
39 return RTE_HYPERVISOR_UNKNOWN;
40 }
41