[v1.03][PPC] Implement hypervisor detection in PowerPC

src/common/cpu.h

@@ -36,6 +36,7 @@ enum {
   HV_VENDOR_VMWARE,
   HV_VENDOR_XEN,
   HV_VENDOR_PARALLELS,
+  HV_VENDOR_PHYP,
   HV_VENDOR_INVALID
 };
 

src/common/printer.c

@@ -681,6 +681,9 @@ bool print_cpufetch_ppc(struct cpuInfo* cpu, STYLE s, struct color** cs, struct
     setAttribute(art, ATTRIBUTE_NAME, cpu_name);
   }
   setAttribute(art, ATTRIBUTE_UARCH, uarch);
+  if(cpu->hv->present) {
+    setAttribute(art, ATTRIBUTE_HYPERVISOR, cpu->hv->hv_name);
+  }
   setAttribute(art, ATTRIBUTE_TECHNOLOGY, manufacturing_process);
   setAttribute(art, ATTRIBUTE_FREQUENCY, max_frequency);
   uint32_t socket_num = get_nsockets(cpu->topo);

src/common/udev.c

@@ -374,3 +374,18 @@ int get_num_sockets_package_cpus(struct topology* topo) {
 
   return ret;
 }
+
+// Inspired in is_devtree_compatible from lscpu
+bool is_devtree_compatible(char* str) {
+  int filelen;
+  char* buf;
+  if((buf = read_file("/proc/device-tree/compatible", &filelen)) == NULL) {
+    return false;
+  }
+
+  char* tmp;
+  if((tmp = strstr(buf, str)) == NULL) {
+    return false;
+  }
+  return true;
+}

src/common/udev.h

@@ -40,5 +40,6 @@ long get_l3_cache_size(uint32_t core);
 int get_num_caches_by_level(struct cpuInfo* cpu, uint32_t level);
 int get_num_sockets_package_cpus(struct topology* topo);
 int get_ncores_from_cpuinfo(void);
+bool is_devtree_compatible(char* str);
 
 #endif

src/ppc/ppc.c

@@ -11,6 +11,17 @@
 #include "../common/udev.h"
 #include "../common/global.h"
 
+static char *hv_vendors_name[] = {
+  [HV_VENDOR_KVM]       = "KVM",
+  [HV_VENDOR_QEMU]      = "QEMU",
+  [HV_VENDOR_HYPERV]    = "Microsoft Hyper-V",
+  [HV_VENDOR_VMWARE]    = "VMware",
+  [HV_VENDOR_XEN]       = "Xen",
+  [HV_VENDOR_PARALLELS] = "Parallels",
+  [HV_VENDOR_PHYP]      = "pHyp",
+  [HV_VENDOR_INVALID]   = STRING_UNKNOWN
+};
+
 struct cache* get_cache_info(struct cpuInfo* cpu) {
   struct cache* cach = emalloc(sizeof(struct cache));
   init_cache_struct(cach);
@@ -164,6 +175,28 @@ int64_t get_peak_performance(struct cpuInfo* cpu, struct topology* topo, int64_t
   return flops;
 }
 
+struct hypervisor* get_hp_info(void) {
+  struct hypervisor* hv = emalloc(sizeof(struct hypervisor));
+  hv->present = false;
+
+  // Weird heuristic found in lscpu:
+  // https://github.com/util-linux/util-linux/blob/master/sys-utils/lscpu-virt.c
+  if(access("/proc" _PATH_DT_IBM_PARTIT_NAME, F_OK) == 0 &&
+     access("/proc" _PATH_DT_HMC_MANAGED, F_OK) == 0 &&
+     access("/proc" _PATH_DT_QEMU_WIDTH, F_OK) != 0) {
+    hv->present = true;
+    hv->hv_vendor = HV_VENDOR_PHYP;
+  }
+  else if(is_devtree_compatible("qemu,pseries")) {
+    hv->present = true;
+    hv->hv_vendor = HV_VENDOR_QEMU;
+  }
+
+  hv->hv_name = hv_vendors_name[hv->hv_vendor];
+
+  return hv;
+}
+
 struct cpuInfo* get_cpu_info(void) {
   struct cpuInfo* cpu = emalloc(sizeof(struct cpuInfo));
   struct features* feat = emalloc(sizeof(struct features));
@@ -182,6 +215,7 @@ struct cpuInfo* get_cpu_info(void) {
     printWarn("Could not open '%s'", path);
   }
   cpu->pvr = mfpvr();
+  cpu->hv = get_hp_info();
   cpu->arch = get_cpu_uarch(cpu);
   cpu->freq = get_frequency_info();
   cpu->topo = get_topology_info(cpu->cach);

src/ppc/udev.h

@@ -4,6 +4,9 @@
 #include "../common/udev.h"
 #define _PATH_DT                  "/proc/device-tree/vpd/root-node-vpd@a000/enclosure@1e00/backplane@800/processor@1000"
 #define _PATH_DT_PART             "/part-number"
+#define _PATH_DT_IBM_PARTIT_NAME  "/device-tree/ibm,partition-name"
+#define _PATH_DT_HMC_MANAGED      "/device-tree/hmc-managed?"
+#define _PATH_DT_QEMU_WIDTH       "/device-tree/chosen/qemu,graphic-width"
 
 bool fill_core_ids_from_sys(int *core_ids, int total_cores);
 bool fill_package_ids_from_sys(int* package_ids, int total_cores);

src/x86/cpuid.c

@@ -30,6 +30,7 @@ static const char *hv_vendors_string[] = {
   [HV_VENDOR_VMWARE]    = "VMwareVMware",
   [HV_VENDOR_XEN]       = "XenVMMXenVMM",
   [HV_VENDOR_PARALLELS] = "lrpepyh vr",
+  [HV_VENDOR_PHYP]      = NULL
 };
 
 static char *hv_vendors_name[] = {
@@ -39,11 +40,10 @@ static char *hv_vendors_name[] = {
   [HV_VENDOR_VMWARE]    = "VMware",
   [HV_VENDOR_XEN]       = "Xen",
   [HV_VENDOR_PARALLELS] = "Parallels",
+  [HV_VENDOR_PHYP]      = "pHyp",
   [HV_VENDOR_INVALID]   = STRING_UNKNOWN
 };
 
-#define HYPERVISOR_NAME_MAX_LENGTH 17
-
 #define MASK 0xFF
 
 /*
@@ -269,7 +269,7 @@ struct hypervisor* get_hp_info(bool hv_present) {
   uint8_t len = sizeof(hv_vendors_string) / sizeof(hv_vendors_string[0]);
 
   for(uint8_t v=0; v < len && !found; v++) {
-    if(strcmp(hv_vendors_string[v], name) == 0) {
+    if(hv_vendors_string[v] != NULL && strcmp(hv_vendors_string[v], name) == 0) {
       hv->hv_vendor = v;
       found = true;
     }
@@ -277,7 +277,7 @@ struct hypervisor* get_hp_info(bool hv_present) {
 
   if(!found) {
     hv->hv_vendor = HV_VENDOR_INVALID;
-    printWarn("Unknown hypervisor vendor: %s", name);
+    printBug("Unknown hypervisor vendor: %s", name);
   }
 
   hv->hv_name = hv_vendors_name[hv->hv_vendor];