New upstream version 18.02

[deb_dpdk.git] / lib / librte_eal / common / arch / x86 / rte_hypervisor.c

diff --git a/lib/librte_eal/common/arch/x86/rte_hypervisor.c b/lib/librte_eal/common/arch/x86/rte_hypervisor.c
new file mode 100644 (file)
index 0000000..edf07be
--- /dev/null
+++ b/lib/librte_eal/common/arch/x86/rte_hypervisor.c
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2017 Mellanox Technologies, Ltd.
+ */
+
+#include "rte_hypervisor.h"
+
+#include <stdint.h>
+#include <string.h>
+
+#include "rte_cpuflags.h"
+#include "rte_cpuid.h"
+
+/* See http://lwn.net/Articles/301888/ */
+#define HYPERVISOR_INFO_LEAF 0x40000000
+
+enum rte_hypervisor
+rte_hypervisor_get(void)
+{
+       cpuid_registers_t regs;
+       int reg;
+       char name[13];
+
+       if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_HYPERVISOR))
+               return RTE_HYPERVISOR_NONE;
+
+       __cpuid(HYPERVISOR_INFO_LEAF,
+                       regs[RTE_REG_EAX], regs[RTE_REG_EBX],
+                       regs[RTE_REG_ECX], regs[RTE_REG_EDX]);
+       for (reg = 1; reg < 4; reg++)
+               memcpy(name + (reg - 1) * 4, &regs[reg], 4);
+       name[12] = '\0';
+
+       if (strcmp("KVMKVMKVM", name) == 0)
+               return RTE_HYPERVISOR_KVM;
+       if (strcmp("Microsoft Hv", name) == 0)
+               return RTE_HYPERVISOR_HYPERV;
+       if (strcmp("VMwareVMware", name) == 0)
+               return RTE_HYPERVISOR_VMWARE;
+       return RTE_HYPERVISOR_UNKNOWN;
+}