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authorLiu, Jinsong <jinsong.liu@intel.com>2012-06-11 20:38:08 +0800
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2012-07-19 15:51:39 -0400
commitf65c9bb3fb725551d3e405f4d092caf24929cebe (patch)
treed68e9715ac73dd431709ddf2301a313105688b68 /include/xen/interface
parent05e36006adc3046f86f2be8652a22d5f77ebd6ea (diff)
downloadlinux-f65c9bb3fb725551d3e405f4d092caf24929cebe.tar.bz2
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/interface')
-rw-r--r--include/xen/interface/platform.h8
-rw-r--r--include/xen/interface/xen.h1
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