[PATCH 3/5] lscpu: detect OS/400 and pHyp hypervisors

Ruediger Meier
2014-05-20T15:43:01Z

From: Ruediger Meier <ruediger.meier@ga-group.nl>

This patch comes from openSUSE / SLE. Original author was probably
Petr Uzel.
Internal SUSE references: fate310255, sr226509

CC: Stanislav Brabec <sbrabec@suse.cz>
CC: Petr Uzel <petr.uzel@suse.cz>
Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>
---
sys-utils/lscpu.c | 50 +++++++++++++++++++++++++++++++++++++++++++++++++-
sys-utils/lscpu.h | 4 +++-
2 files changed, 52 insertions(+), 2 deletions(-)

diff --git a/sys-utils/lscpu.c b/sys-utils/lscpu.c
index 0203916..b9e07e6 100644
--- a/sys-utils/lscpu.c
+++ b/sys-utils/lscpu.c
@@ -60,6 +60,7 @@
#define _PATH_PROC_STATUS "/proc/self/status"
#define _PATH_PROC_VZ "/proc/vz"
#define _PATH_PROC_BC "/proc/bc"
+#define _PATH_PROC_DEVICETREE "/proc/device-tree"
#define _PATH_DEV_MEM "/dev/mem"

/* virtualization types */
@@ -88,7 +89,9 @@ const char *hv_vendors[] = {
[HYPER_INNOTEK] = "Innotek GmbH",
[HYPER_HITACHI] = "Hitachi",
[HYPER_PARALLELS] = "Parallels",
- [HYPER_VBOX] = "Oracle"
+ [HYPER_VBOX] = "Oracle",
+ [HYPER_OS400] = "OS/400",
+ [HYPER_PHYP] = "pHyp"
};

const int hv_vendor_pci[] = {
@@ -574,6 +577,51 @@ read_hypervisor_cpuid(struct lscpu_desc *desc)
static void
read_hypervisor_cpuid(struct lscpu_desc *desc __attribute__((__unused__)))
{
+#ifdef __powerpc__
+ /* powerpc:
+ * IBM iSeries: legacy, if /proc/iSeries exists, its para-virtualized on top of OS/400
+ * IBM pSeries: always has a hypervisor
+ * if partition-name is "full", its kind of "bare-metal": full-system-partition
+ * otherwise its some partition created by Hardware Management Console
+ * in any case, its always some sort of HVM
+ * KVM: "linux,kvm" in /hypervisor/compatible indicates a KVM guest
+ * Xen: not in use, not detected
+ */
+ if (path_exist("/proc/iSeries")) {
+ desc->hyper = HYPER_OS400;
+ desc->virtype = VIRT_FULL;
+ } else if (path_exist(_PATH_PROC_DEVICETREE "/ibm,partition-name")) {
+ FILE *fd;
+ desc->hyper = HYPER_PHYP;
+ desc->virtype = VIRT_FULL;
+ fd = fopen(_PATH_PROC_DEVICETREE "/ibm,partition-name", "r");
+ if (fd) {
+ char buf[256];
+ if (fscanf(fd, "%s", buf) == 1 && !strcmp(buf, "full"))
+ desc->virtype = VIRT_NONE;
+ fclose(fd);
+ }
+ } else if (path_exist(_PATH_PROC_DEVICETREE "/hypervisor/compatible")) {
+ FILE *fd;
+ fd = fopen(_PATH_PROC_DEVICETREE "/hypervisor/compatible", "r");
+ if (fd) {
+ char buf[256];
+ int i;
+ memset(buf, 0, sizeof(buf));
+ fread(buf, sizeof(buf) - 1, 1, fd);
+ fclose(fd);
+ for (i = 0; i < sizeof(buf);) {
+ if (!strcmp(&buf[i], "linux,kvm")) {
+ desc->hyper = HYPER_KVM;
+ desc->virtype = VIRT_FULL;
+ break;
+ }
+ i += strlen(&buf[i]);
+ i++;
+ }
+ }
+ }
+#endif
}
#endif

diff --git a/sys-utils/lscpu.h b/sys-utils/lscpu.h
index 7bb538d..6c25c4f 100644
--- a/sys-utils/lscpu.h
+++ b/sys-utils/lscpu.h
@@ -14,7 +14,9 @@ enum {
HYPER_INNOTEK, /* VBOX */
HYPER_HITACHI,
HYPER_PARALLELS, /* OpenVZ/VIrtuozzo */
- HYPER_VBOX
+ HYPER_VBOX,
+ HYPER_OS400,
+ HYPER_PHYP
};

extern int read_hypervisor_dmi(void);
--
1.8.4.5