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util-linux/util-linux-2.14.1-lscpu_add_hypervisor_detection.patch

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commit c8b64f6d7770d62065bdc4fa5c4f80cc2326e203
Author: Karel Zak <kzak@redhat.com>
Date: Wed Oct 1 01:29:32 2008 +0200
lscpu: add Hypervisor detection
This patch adds two new fields:
* "Hypervisor vendor" -- based on CPUID and hypervisor specific
PCI devices. lscpu(1) supports KVM, XEN, Microsoft HV now.
* "Virtualization type"
- "none" = Xen dom0
- "full" = full virtualization (KVM, Xen, ...)
- "para" = Xen paravirtualization
Co-Author: Ky Srinivasan <ksrinivasan@novell.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
diff --git a/sys-utils/lscpu.1 b/sys-utils/lscpu.1
index 78da8a1..e0e9935 100644
--- a/sys-utils/lscpu.1
+++ b/sys-utils/lscpu.1
@@ -22,6 +22,8 @@ Print out in parsable instead of printable format.
.SH BUGS
The program at the moment does not handle the system installed with
different types of physical processors.
+
+Sometimes in Xen Dom0 kernel reports wrong data.
.SH AUTHOR
Cai Qian <qcai@redhat.com>
.SH AVAILABILITY
diff --git a/sys-utils/lscpu.c b/sys-utils/lscpu.c
index d6bb8b9..82972b3 100644
--- a/sys-utils/lscpu.c
+++ b/sys-utils/lscpu.c
@@ -38,8 +38,10 @@
/* /sys paths */
#define _PATH_SYS_SYSTEM "sys/devices/system"
#define _PATH_SYS_CPU0 _PATH_SYS_SYSTEM "/cpu/cpu0"
-#define _PATH_PROC_XENCAP "proc/xen/capabilities"
+#define _PATH_PROC_XEN "proc/xen"
+#define _PATH_PROC_XENCAP _PATH_PROC_XEN "/capabilities"
#define _PATH_PROC_CPUINFO "proc/cpuinfo"
+#define _PATH_PROC_PCIDEVS "proc/bus/pci/devices"
int have_topology;
int have_cache;
@@ -52,6 +54,33 @@ struct ca_desc {
int camap;
};
+/* virtualization types */
+enum {
+ VIRT_NONE = 0,
+ VIRT_PARA,
+ VIRT_FULL
+};
+const char *virt_types[] = {
+ [VIRT_NONE] = N_("none"),
+ [VIRT_PARA] = N_("para"),
+ [VIRT_FULL] = N_("full")
+};
+
+/* hypervisor vendors */
+enum {
+ HYPER_NONE = 0,
+ HYPER_XEN,
+ HYPER_KVM,
+ HYPER_MSHV
+};
+const char *hv_vendors[] = {
+ [HYPER_NONE] = NULL,
+ [HYPER_XEN] = "Xen",
+ [HYPER_KVM] = "KVM",
+ [HYPER_MSHV] = "Microsoft"
+};
+
+
/* CPU(s) description */
struct cpu_desc {
/* counters */
@@ -67,6 +96,9 @@ struct cpu_desc {
char *vendor;
char *family;
char *model;
+ char *virtflag; /* virtualization flag (vmx, svm) */
+ int hyper; /* hypervisor vendor ID */
+ int virtype; /* VIRT_PARA|FULL|NONE ? */
/* caches */
struct ca_desc cache[CACHE_MAX];
@@ -246,9 +278,130 @@ read_basicinfo(struct cpu_desc *cpu)
else
continue;
}
+
+ if (cpu->flags) {
+ snprintf(buf, sizeof(buf), " %s ", cpu->flags);
+ if (strstr(buf, " svm "))
+ cpu->virtflag = strdup("svm");
+ else if (strstr(buf, " vmx "))
+ cpu->virtflag = strdup("vmx");
+ }
+
fclose(fp);
}
+static int
+has_pci_device(int vendor, int device)
+{
+ FILE *f;
+ int num, fn, ven, dev;
+ int res = 1;
+
+ f = fopen(_PATH_PROC_PCIDEVS, "r");
+ if (!f)
+ return 0;
+
+ /* for more details about bus/pci/devices format see
+ * drivers/pci/proc.c in linux kernel
+ */
+ while(fscanf(f, "%02x%02x\t%04x%04x\t%*[^\n]",
+ &num, &fn, &ven, &dev) == 4) {
+
+ if (ven == vendor && dev == device)
+ goto found;
+ }
+
+ res = 0;
+found:
+ fclose(f);
+ return res;
+}
+
+#if defined(__x86_64__) || defined(__i386__)
+
+/*
+ * This CPUID leaf returns the information about the hypervisor.
+ * EAX : maximum input value for CPUID supported by the hypervisor.
+ * EBX, ECX, EDX : Hypervisor vendor ID signature. E.g. VMwareVMware.
+ */
+#define HYPERVISOR_INFO_LEAF 0x40000000
+
+static inline void
+cpuid(unsigned int op, unsigned int *eax, unsigned int *ebx,
+ unsigned int *ecx, unsigned int *edx)
+{
+ __asm__("cpuid"
+ : "=a" (*eax),
+ "=b" (*ebx),
+ "=c" (*ecx),
+ "=d" (*edx)
+ : "0" (op), "c"(0));
+}
+
+static void
+read_hypervisor_cpuid(struct cpu_desc *cpu)
+{
+ unsigned int eax = 0, ebx = 0, ecx = 0, edx = 0;
+ char hyper_vendor_id[13];
+
+ memset(hyper_vendor_id, 0, sizeof(hyper_vendor_id));
+
+ cpuid(HYPERVISOR_INFO_LEAF, &eax, &ebx, &ecx, &edx);
+ memcpy(hyper_vendor_id + 0, &ebx, 4);
+ memcpy(hyper_vendor_id + 4, &ecx, 4);
+ memcpy(hyper_vendor_id + 8, &edx, 4);
+ hyper_vendor_id[12] = '\0';
+
+ if (!hyper_vendor_id[0])
+ return;
+
+ if (!strncmp("XenVMMXenVMM", hyper_vendor_id, 12))
+ cpu->hyper = HYPER_XEN;
+ else if (!strncmp("KVMKVMKVM", hyper_vendor_id, 9))
+ cpu->hyper = HYPER_KVM;
+ else if (!strncmp("Microsoft Hv", hyper_vendor_id, 12))
+ cpu->hyper = HYPER_MSHV;
+}
+
+#else /* ! __x86_64__ */
+static void
+read_hypervisor_cpuid(struct cpu_desc *cpu)
+{
+}
+#endif
+
+static void
+read_hypervisor(struct cpu_desc *cpu)
+{
+ read_hypervisor_cpuid(cpu);
+
+ if (cpu->hyper)
+ /* hvm */
+ cpu->virtype = VIRT_FULL;
+
+ else if (!access(_PATH_PROC_XEN, F_OK)) {
+ /* Xen para-virt or dom0 */
+ FILE *fd = fopen(_PATH_PROC_XENCAP, "r");
+ int dom0 = 0;
+
+ if (fd) {
+ char buf[256];
+
+ if (fscanf(fd, "%s", buf) == 1 &&
+ !strcmp(buf, "control_d"))
+ dom0 = 1;
+ fclose(fd);
+ }
+ cpu->virtype = dom0 ? VIRT_NONE : VIRT_PARA;
+ cpu->hyper = HYPER_XEN;
+
+ } else if (has_pci_device(0x5853, 0x0001)) {
+ /* Xen full-virt on non-x86_64 */
+ cpu->hyper = HYPER_XEN;
+ cpu->virtype = VIRT_FULL;
+ }
+}
+
static void
read_topology(struct cpu_desc *cpu)
{
@@ -337,18 +490,6 @@ read_nodes(struct cpu_desc *cpu)
static void
check_system(void)
{
- FILE *fd;
- char buf[256];
-
- /* Dom0 Kernel gives wrong information. */
- fd = fopen(_PATH_PROC_XENCAP, "r");
- if (fd) {
- if (fscanf(fd, "%s", buf) == 1 && !strcmp(buf, "control_d"))
- errx(EXIT_FAILURE,
- _("error: Dom0 Kernel is unsupported."));
- fclose(fd);
- }
-
/* Read through sysfs. */
if (access(_PATH_SYS_SYSTEM, F_OK))
errx(EXIT_FAILURE,
@@ -432,8 +573,6 @@ print_parsable(struct cpu_desc *cpu)
static void
print_readable(struct cpu_desc *cpu)
{
- char buf[BUFSIZ];
-
print_s("Architecture:", cpu->arch);
print_n("CPU(s):", cpu->ct_cpu);
@@ -455,15 +594,18 @@ print_readable(struct cpu_desc *cpu)
print_s(_("Stepping:"), cpu->stepping);
if (cpu->mhz)
print_s(_("CPU MHz:"), cpu->mhz);
- if (cpu->flags) {
- snprintf(buf, sizeof(buf), " %s ", cpu->flags);
- if (strstr(buf, " svm "))
+ if (cpu->virtflag) {
+ if (!strcmp(cpu->virtflag, "svm"))
print_s(_("Virtualization:"), "AMD-V");
- else if (strstr(buf, " vmx "))
+ else if (!strcmp(cpu->virtflag, "vmx"))
print_s(_("Virtualization:"), "VT-x");
}
-
+ if (cpu->hyper) {
+ print_s(_("Hypervisor vendor:"), hv_vendors[cpu->hyper]);
+ print_s(_("Virtualization type:"), virt_types[cpu->virtype]);
+ }
if (have_cache) {
+ char buf[512];
int i;
for (i = cpu->ct_cache - 1; i >= 0; i--) {
@@ -545,6 +687,8 @@ int main(int argc, char *argv[])
if (have_node)
read_nodes(cpu);
+ read_hypervisor(cpu);
+
/* Show time! */
if (parsable)
print_parsable(cpu);
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