From: Thomas Monjalon <thomas@monjalon.net>
To: dev@dpdk.org
Cc: Stephen Hemminger <sthemmin@microsoft.com>,
Jerin Jacob <jerin.jacob@caviumnetworks.com>
Subject: [dpdk-dev] [PATCH v2] eal/x86: get hypervisor name
Date: Sat, 30 Dec 2017 23:47:23 +0100 [thread overview]
Message-ID: <20171230224723.13147-1-thomas@monjalon.net> (raw)
In-Reply-To: <20171130214720.30098-1-thomas@monjalon.net>
The CPUID instruction is catched by hypervisor which can return
a flag indicating one is running, and its name.
Suggested-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
---
v2 changes:
- remove C99 style declaration
- move code in rte_hypervisor.* files
- add a function to get the name string
---
lib/librte_eal/bsdapp/eal/Makefile | 2 ++
lib/librte_eal/common/Makefile | 2 +-
lib/librte_eal/common/arch/arm/rte_hypervisor.c | 11 ++++++
lib/librte_eal/common/arch/ppc_64/rte_hypervisor.c | 11 ++++++
lib/librte_eal/common/arch/x86/rte_cpuflags.c | 11 ++----
lib/librte_eal/common/arch/x86/rte_cpuid.h | 19 ++++++++++
lib/librte_eal/common/arch/x86/rte_hypervisor.c | 40 ++++++++++++++++++++++
lib/librte_eal/common/eal_common_hypervisor.c | 22 ++++++++++++
.../common/include/arch/x86/rte_cpuflags.h | 1 +
lib/librte_eal/common/include/rte_hypervisor.h | 33 ++++++++++++++++++
lib/librte_eal/linuxapp/eal/Makefile | 2 ++
lib/librte_eal/rte_eal_version.map | 10 +++++-
12 files changed, 153 insertions(+), 11 deletions(-)
create mode 100644 lib/librte_eal/common/arch/arm/rte_hypervisor.c
create mode 100644 lib/librte_eal/common/arch/ppc_64/rte_hypervisor.c
create mode 100644 lib/librte_eal/common/arch/x86/rte_cpuid.h
create mode 100644 lib/librte_eal/common/arch/x86/rte_hypervisor.c
create mode 100644 lib/librte_eal/common/eal_common_hypervisor.c
create mode 100644 lib/librte_eal/common/include/rte_hypervisor.h
diff --git a/lib/librte_eal/bsdapp/eal/Makefile b/lib/librte_eal/bsdapp/eal/Makefile
index afa117de4..d0c943d4e 100644
--- a/lib/librte_eal/bsdapp/eal/Makefile
+++ b/lib/librte_eal/bsdapp/eal/Makefile
@@ -71,6 +71,7 @@ SRCS-$(CONFIG_RTE_EXEC_ENV_BSDAPP) += eal_common_memory.c
SRCS-$(CONFIG_RTE_EXEC_ENV_BSDAPP) += eal_common_tailqs.c
SRCS-$(CONFIG_RTE_EXEC_ENV_BSDAPP) += eal_common_errno.c
SRCS-$(CONFIG_RTE_EXEC_ENV_BSDAPP) += eal_common_cpuflags.c
+SRCS-$(CONFIG_RTE_EXEC_ENV_BSDAPP) += eal_common_hypervisor.c
SRCS-$(CONFIG_RTE_EXEC_ENV_BSDAPP) += eal_common_string_fns.c
SRCS-$(CONFIG_RTE_EXEC_ENV_BSDAPP) += eal_common_hexdump.c
SRCS-$(CONFIG_RTE_EXEC_ENV_BSDAPP) += eal_common_devargs.c
@@ -87,6 +88,7 @@ SRCS-$(CONFIG_RTE_EXEC_ENV_BSDAPP) += rte_service.c
# from arch dir
SRCS-$(CONFIG_RTE_EXEC_ENV_BSDAPP) += rte_cpuflags.c
+SRCS-$(CONFIG_RTE_EXEC_ENV_BSDAPP) += rte_hypervisor.c
SRCS-$(CONFIG_RTE_ARCH_X86) += rte_spinlock.c
SRCS-y += rte_cycles.c
diff --git a/lib/librte_eal/common/Makefile b/lib/librte_eal/common/Makefile
index 9effd0d45..f7c9ed952 100644
--- a/lib/librte_eal/common/Makefile
+++ b/lib/librte_eal/common/Makefile
@@ -43,7 +43,7 @@ INC += rte_hexdump.h rte_devargs.h rte_bus.h rte_dev.h
INC += rte_pci_dev_feature_defs.h rte_pci_dev_features.h
INC += rte_malloc.h rte_keepalive.h rte_time.h
INC += rte_service.h rte_service_component.h
-INC += rte_bitmap.h rte_vfio.h
+INC += rte_bitmap.h rte_vfio.h rte_hypervisor.h
GENERIC_INC := rte_atomic.h rte_byteorder.h rte_cycles.h rte_prefetch.h
GENERIC_INC += rte_spinlock.h rte_memcpy.h rte_cpuflags.h rte_rwlock.h
diff --git a/lib/librte_eal/common/arch/arm/rte_hypervisor.c b/lib/librte_eal/common/arch/arm/rte_hypervisor.c
new file mode 100644
index 000000000..3792fe2ce
--- /dev/null
+++ b/lib/librte_eal/common/arch/arm/rte_hypervisor.c
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2017 Mellanox Technologies, Ltd.
+ */
+
+#include "rte_hypervisor.h"
+
+enum rte_hypervisor
+rte_hypervisor_get(void)
+{
+ return RTE_HYPERVISOR_UNKNOWN;
+}
diff --git a/lib/librte_eal/common/arch/ppc_64/rte_hypervisor.c b/lib/librte_eal/common/arch/ppc_64/rte_hypervisor.c
new file mode 100644
index 000000000..3792fe2ce
--- /dev/null
+++ b/lib/librte_eal/common/arch/ppc_64/rte_hypervisor.c
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2017 Mellanox Technologies, Ltd.
+ */
+
+#include "rte_hypervisor.h"
+
+enum rte_hypervisor
+rte_hypervisor_get(void)
+{
+ return RTE_HYPERVISOR_UNKNOWN;
+}
diff --git a/lib/librte_eal/common/arch/x86/rte_cpuflags.c b/lib/librte_eal/common/arch/x86/rte_cpuflags.c
index 7d4a0fefb..c33cd8779 100644
--- a/lib/librte_eal/common/arch/x86/rte_cpuflags.c
+++ b/lib/librte_eal/common/arch/x86/rte_cpuflags.c
@@ -36,16 +36,8 @@
#include <stdio.h>
#include <errno.h>
#include <stdint.h>
-#include <cpuid.h>
-enum cpu_register_t {
- RTE_REG_EAX = 0,
- RTE_REG_EBX,
- RTE_REG_ECX,
- RTE_REG_EDX,
-};
-
-typedef uint32_t cpuid_registers_t[4];
+#include "rte_cpuid.h"
/**
* Struct to hold a processor feature entry
@@ -92,6 +84,7 @@ const struct feature_entry rte_cpu_feature_table[] = {
FEAT_DEF(AVX, 0x00000001, 0, RTE_REG_ECX, 28)
FEAT_DEF(F16C, 0x00000001, 0, RTE_REG_ECX, 29)
FEAT_DEF(RDRAND, 0x00000001, 0, RTE_REG_ECX, 30)
+ FEAT_DEF(HYPERVISOR, 0x00000001, 0, RTE_REG_ECX, 31)
FEAT_DEF(FPU, 0x00000001, 0, RTE_REG_EDX, 0)
FEAT_DEF(VME, 0x00000001, 0, RTE_REG_EDX, 1)
diff --git a/lib/librte_eal/common/arch/x86/rte_cpuid.h b/lib/librte_eal/common/arch/x86/rte_cpuid.h
new file mode 100644
index 000000000..b773ad931
--- /dev/null
+++ b/lib/librte_eal/common/arch/x86/rte_cpuid.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2015 Intel Corporation
+ */
+
+#ifndef RTE_CPUID_H
+#define RTE_CPUID_H
+
+#include <cpuid.h>
+
+enum cpu_register_t {
+ RTE_REG_EAX = 0,
+ RTE_REG_EBX,
+ RTE_REG_ECX,
+ RTE_REG_EDX,
+};
+
+typedef uint32_t cpuid_registers_t[4];
+
+#endif /* RTE_CPUID_H */
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
index 000000000..edf07be18
--- /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, ®s[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;
+}
diff --git a/lib/librte_eal/common/eal_common_hypervisor.c b/lib/librte_eal/common/eal_common_hypervisor.c
new file mode 100644
index 000000000..c3b4c621b
--- /dev/null
+++ b/lib/librte_eal/common/eal_common_hypervisor.c
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2017 Mellanox Technologies, Ltd.
+ */
+
+#include "rte_hypervisor.h"
+
+const char *
+rte_hypervisor_get_name(enum rte_hypervisor id)
+{
+ switch (id) {
+ case RTE_HYPERVISOR_NONE:
+ return "none";
+ case RTE_HYPERVISOR_KVM:
+ return "KVM";
+ case RTE_HYPERVISOR_HYPERV:
+ return "Hyper-V";
+ case RTE_HYPERVISOR_VMWARE:
+ return "VMware";
+ default:
+ return "unknown";
+ }
+}
diff --git a/lib/librte_eal/common/include/arch/x86/rte_cpuflags.h b/lib/librte_eal/common/include/arch/x86/rte_cpuflags.h
index 26204fabb..686ac07f3 100644
--- a/lib/librte_eal/common/include/arch/x86/rte_cpuflags.h
+++ b/lib/librte_eal/common/include/arch/x86/rte_cpuflags.h
@@ -69,6 +69,7 @@ enum rte_cpu_flag_t {
RTE_CPUFLAG_AVX, /**< AVX */
RTE_CPUFLAG_F16C, /**< F16C */
RTE_CPUFLAG_RDRAND, /**< RDRAND */
+ RTE_CPUFLAG_HYPERVISOR, /**< Running on a hypervisor */
/* (EAX 01h) EDX features */
RTE_CPUFLAG_FPU, /**< FPU */
diff --git a/lib/librte_eal/common/include/rte_hypervisor.h b/lib/librte_eal/common/include/rte_hypervisor.h
new file mode 100644
index 000000000..8d8aac744
--- /dev/null
+++ b/lib/librte_eal/common/include/rte_hypervisor.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2017 Mellanox Technologies, Ltd.
+ */
+
+#ifndef RTE_HYPERVISOR_H
+#define RTE_HYPERVISOR_H
+
+/**
+ * @file
+ * Hypervisor awareness.
+ */
+
+enum rte_hypervisor {
+ RTE_HYPERVISOR_NONE,
+ RTE_HYPERVISOR_KVM,
+ RTE_HYPERVISOR_HYPERV,
+ RTE_HYPERVISOR_VMWARE,
+ RTE_HYPERVISOR_UNKNOWN
+};
+
+/**
+ * Get the id of hypervisor it is running on.
+ */
+enum rte_hypervisor
+rte_hypervisor_get(void);
+
+/**
+ * Get the name of a given hypervisor id.
+ */
+const char *
+rte_hypervisor_get_name(enum rte_hypervisor id);
+
+#endif /* RTE_HYPERVISOR_H */
diff --git a/lib/librte_eal/linuxapp/eal/Makefile b/lib/librte_eal/linuxapp/eal/Makefile
index 5a7b8b2ac..257b10d5e 100644
--- a/lib/librte_eal/linuxapp/eal/Makefile
+++ b/lib/librte_eal/linuxapp/eal/Makefile
@@ -78,6 +78,7 @@ SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += eal_common_memory.c
SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += eal_common_tailqs.c
SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += eal_common_errno.c
SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += eal_common_cpuflags.c
+SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += eal_common_hypervisor.c
SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += eal_common_string_fns.c
SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += eal_common_hexdump.c
SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += eal_common_devargs.c
@@ -94,6 +95,7 @@ SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += rte_service.c
# from arch dir
SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += rte_cpuflags.c
+SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += rte_hypervisor.c
SRCS-$(CONFIG_RTE_ARCH_X86) += rte_spinlock.c
SRCS-y += rte_cycles.c
diff --git a/lib/librte_eal/rte_eal_version.map b/lib/librte_eal/rte_eal_version.map
index f4f46c1be..b3dc5a746 100644
--- a/lib/librte_eal/rte_eal_version.map
+++ b/lib/librte_eal/rte_eal_version.map
@@ -200,6 +200,14 @@ DPDK_17.11 {
} DPDK_17.08;
+DPDK_18.02 {
+ global:
+
+ rte_hypervisor_get;
+ rte_hypervisor_get_name;
+
+} DPDK_17.11;
+
EXPERIMENTAL {
global:
@@ -235,4 +243,4 @@ EXPERIMENTAL {
rte_service_set_stats_enable;
rte_service_start_with_defaults;
-} DPDK_17.11;
+} DPDK_18.02;
--
2.15.1
next prev parent reply other threads:[~2017-12-30 22:47 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-30 21:47 [dpdk-dev] [PATCH] " Thomas Monjalon
2017-11-30 21:55 ` Stephen Hemminger
2017-11-30 22:03 ` Thomas Monjalon
2017-11-30 22:11 ` Stephen Hemminger
2017-12-01 8:12 ` Jerin Jacob
2017-12-01 8:52 ` Thomas Monjalon
2017-12-01 9:17 ` Jerin Jacob
2017-12-30 22:47 ` Thomas Monjalon [this message]
2018-01-02 10:20 ` [dpdk-dev] [PATCH v2] " Jerin Jacob
2018-01-02 16:34 ` Stephen Hemminger
2018-01-03 8:11 ` Thomas Monjalon
2018-01-07 22:20 ` [dpdk-dev] [PATCH v3] " Thomas Monjalon
2018-01-08 16:54 ` Stephen Hemminger
2018-01-08 18:45 ` Thomas Monjalon
2018-01-08 19:05 ` Stephen Hemminger
2018-01-11 23:40 ` Thomas Monjalon
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