xen/PMU: Sysfs interface for setting Xen PMU mode

Set Xen's PMU mode via /sys/hypervisor/pmu/pmu_mode. Add XENPMU hypercall.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>

diff --git a/Documentation/ABI/testing/sysfs-hypervisor-pmu b/Documentation/ABI/testing/sysfs-hypervisor-pmu
new file mode 100644 (file)
index 0000000..224faa1
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-hypervisor-pmu
@@ -0,0 +1,23 @@
+What:          /sys/hypervisor/pmu/pmu_mode
+Date:          August 2015
+KernelVersion: 4.3
+Contact:       Boris Ostrovsky <boris.ostrovsky@oracle.com>
+Description:
+               Describes mode that Xen's performance-monitoring unit (PMU)
+               uses. Accepted values are
+                       "off"  -- PMU is disabled
+                       "self" -- The guest can profile itself
+                       "hv"   -- The guest can profile itself and, if it is
+                                 privileged (e.g. dom0), the hypervisor
+                       "all" --  The guest can profile itself, the hypervisor
+                                 and all other guests. Only available to
+                                 privileged guests.
+
+What:           /sys/hypervisor/pmu/pmu_features
+Date:           August 2015
+KernelVersion:  4.3
+Contact:        Boris Ostrovsky <boris.ostrovsky@oracle.com>
+Description:
+               Describes Xen PMU features (as an integer). A set bit indicates
+               that the corresponding feature is enabled. See
+               include/xen/interface/xenpmu.h for available features

diff --cc arch/x86/include/asm/xen/hypercall.h
Simple merge

diff --cc arch/x86/xen/Kconfig
Simple merge

diff --cc drivers/xen/Kconfig
Simple merge

diff --cc drivers/xen/sys-hypervisor.c
Simple merge

diff --cc include/xen/interface/xen.h
Simple merge

diff --cc include/xen/interface/xenpmu.h
Simple merge