Displaying 2 results from an estimated 2 matches for "xenpf_set_processor_pminfo_t".
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xenpf_set_processor_pminfo
2008 Sep 19
8
[PATCH] x86: add hypercall to query current underlying pCPU''s frequency
...================================
--- 2008-09-19.orig/xen/include/public/platform.h 2008-09-19 14:12:02.000000000 +0200
+++ 2008-09-19/xen/include/public/platform.h 2008-09-19 13:59:35.000000000 +0200
@@ -312,6 +312,16 @@ struct xenpf_set_processor_pminfo {
typedef struct xenpf_set_processor_pminfo xenpf_set_processor_pminfo_t;
DEFINE_XEN_GUEST_HANDLE(xenpf_set_processor_pminfo_t);
+#define XENPF_get_cpu_freq 55
+struct xenpf_get_cpu_freq {
+ /* IN variables */
+ uint32_t vcpu;
+ /* OUT variables */
+ uint32_t freq; /* in kHz */
+};
+typedef struct xenpf_get_cpu_freq xenpf_get_cpu_freq_t;
+DEFINE_XE...
2011 Aug 15
36
expose MWAIT to dom0
There''re basically two methods to enter a given C-state: legacy (hlt + I/O read),
and native(using mwait). MWAIT is always preferred when both underlying CPU
and OS support, which is a more efficient way to conduct C-state transition.
Xen PM relies on Dom0 to parse ACPI Cx/Px information, which involves one
step to notify BIOS about a set of capabilities supported by OSPM. One capability