diff options
| author | Liu, Jinsong <jinsong.liu@intel.com> | 2012-06-11 16:38:08 +0400 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-07-19 23:51:39 +0400 |
| commit | f65c9bb3fb725551d3e405f4d092caf24929cebe (patch) | |
| tree | d68e9715ac73dd431709ddf2301a313105688b68 /include/xen | |
| parent | 05e36006adc3046f86f2be8652a22d5f77ebd6ea (diff) | |
| download | linux-f65c9bb3fb725551d3e405f4d092caf24929cebe.tar.xz | |
xen/pcpu: Xen physical cpus online/offline sys interface
This patch provide Xen physical cpus online/offline sys interface.
User can use it for their own purpose, like power saving:
by offlining some cpus when light workload it save power greatly.
Its basic workflow is, user online/offline cpu via sys interface,
then hypercall xen to implement, after done xen inject virq back to dom0,
and then dom0 sync cpu status.
Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com>
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'include/xen')
| -rw-r--r-- | include/xen/interface/platform.h | 8 | ||||
| -rw-r--r-- | include/xen/interface/xen.h | 1 |
2 files changed, 9 insertions, 0 deletions
diff --git a/include/xen/interface/platform.h b/include/xen/interface/platform.h index 486653f0dd8f..61fa66160983 100644 --- a/include/xen/interface/platform.h +++ b/include/xen/interface/platform.h @@ -314,6 +314,13 @@ struct xenpf_pcpuinfo { }; DEFINE_GUEST_HANDLE_STRUCT(xenpf_pcpuinfo); +#define XENPF_cpu_online 56 +#define XENPF_cpu_offline 57 +struct xenpf_cpu_ol { + uint32_t cpuid; +}; +DEFINE_GUEST_HANDLE_STRUCT(xenpf_cpu_ol); + struct xen_platform_op { uint32_t cmd; uint32_t interface_version; /* XENPF_INTERFACE_VERSION */ @@ -330,6 +337,7 @@ struct xen_platform_op { struct xenpf_getidletime getidletime; struct xenpf_set_processor_pminfo set_pminfo; struct xenpf_pcpuinfo pcpu_info; + struct xenpf_cpu_ol cpu_ol; uint8_t pad[128]; } u; }; diff --git a/include/xen/interface/xen.h b/include/xen/interface/xen.h index a890804945e3..0801468f9abe 100644 --- a/include/xen/interface/xen.h +++ b/include/xen/interface/xen.h @@ -80,6 +80,7 @@ #define VIRQ_CONSOLE 2 /* (DOM0) Bytes received on emergency console. */ #define VIRQ_DOM_EXC 3 /* (DOM0) Exceptional event for some domain. */ #define VIRQ_DEBUGGER 6 /* (DOM0) A domain has paused for debugging. */ +#define VIRQ_PCPU_STATE 9 /* (DOM0) PCPU state changed */ /* Architecture-specific VIRQ definitions. */ #define VIRQ_ARCH_0 16 |