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| author | Juergen Gross <jgross@suse.com> | 2017-06-14 17:12:45 +0200 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2017-06-15 08:50:32 +0200 |
| commit | 4a4c29c96dde0eefd69054fd9e6b4255d4717799 (patch) | |
| tree | d13f72b7468d13b163ec0102014d718c32ea66d3 /Documentation/ABI/testing | |
| parent | doc,xen: document hypervisor sysfs nodes for xen (diff) | |
| download | linux-4a4c29c96dde0eefd69054fd9e6b4255d4717799.tar.xz linux-4a4c29c96dde0eefd69054fd9e6b4255d4717799.zip | |
xen: add sysfs node for guest type
Currently there is no reliable user interface inside a Xen guest to
determine its type (e.g. HVM, PV or PVH). Instead of letting user mode
try to determine this by various rather hacky mechanisms (parsing of
boot messages before they are gone, trying to make use of known subtle
differences in behavior of some instructions), add a sysfs node
/sys/hypervisor/guest_type to explicitly deliver this information as
it is known to the kernel.
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'Documentation/ABI/testing')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-hypervisor-xen (renamed from Documentation/ABI/testing/sysfs-hypervisor-pmu) | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/Documentation/ABI/testing/sysfs-hypervisor-pmu b/Documentation/ABI/testing/sysfs-hypervisor-xen index 224faa105e18..c0edb3fdd6eb 100644 --- a/Documentation/ABI/testing/sysfs-hypervisor-pmu +++ b/Documentation/ABI/testing/sysfs-hypervisor-xen @@ -1,8 +1,19 @@ +What: /sys/hypervisor/guest_type +Date: May 2017 +KernelVersion: 4.13 +Contact: xen-devel@lists.xenproject.org +Description: If running under Xen: + Type of guest: + "Xen": standard guest type on arm + "HVM": fully virtualized guest (x86) + "PV": paravirtualized guest (x86) + "PVH": fully virtualized guest without legacy emulation (x86) + What: /sys/hypervisor/pmu/pmu_mode Date: August 2015 KernelVersion: 4.3 Contact: Boris Ostrovsky <boris.ostrovsky@oracle.com> -Description: +Description: If running under Xen: Describes mode that Xen's performance-monitoring unit (PMU) uses. Accepted values are "off" -- PMU is disabled @@ -17,7 +28,7 @@ What: /sys/hypervisor/pmu/pmu_features Date: August 2015 KernelVersion: 4.3 Contact: Boris Ostrovsky <boris.ostrovsky@oracle.com> -Description: +Description: If running under Xen: 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 |