xen/x86-cpufreq-report.patch

--- a/xen/arch/x86/platform_hypercall.c
+++ b/xen/arch/x86/platform_hypercall.c
@@ -25,7 +25,7 @@
 #include <xen/irq.h>
 #include <asm/current.h>
 #include <public/platform.h>
-#include <acpi/cpufreq/processor_perf.h>
+#include <acpi/cpufreq/cpufreq.h>
 #include <asm/edd.h>
 #include <asm/mtrr.h>
 #include <asm/io_apic.h>
@@ -639,6 +639,41 @@ ret_t do_platform_op(XEN_GUEST_HANDLE(xe
     }
     break;
 
+    case XENPF_get_cpu_freq:
+    case XENPF_get_cpu_freq_min:
+    case XENPF_get_cpu_freq_max:
+    {
+        struct vcpu *v;
+        const struct cpufreq_policy *policy;
+
+        if ( op->u.get_cpu_freq.vcpu >= current->domain->max_vcpus ||
+             !(v = current->domain->vcpu[op->u.get_cpu_freq.vcpu]) )
+        {
+            ret = -EINVAL;
+            break;
+        }
+
+        policy = per_cpu(cpufreq_cpu_policy, v->processor);
+        switch ( op->cmd & -!!policy )
+        {
+        case XENPF_get_cpu_freq:
+            op->u.get_cpu_freq.freq = policy->cur;
+            break;
+        case XENPF_get_cpu_freq_min:
+            op->u.get_cpu_freq.freq = policy->min;
+            break;
+        case XENPF_get_cpu_freq_max:
+            op->u.get_cpu_freq.freq = policy->max;
+            break;
+        default:
+            op->u.get_cpu_freq.freq = 0;
+            break;
+        }
+        if ( copy_field_to_guest(u_xenpf_op, op, u.get_cpu_freq.freq) )
+            ret = -EFAULT;
+    }
+    break;
+
     default:
         ret = -ENOSYS;
         break;
--- a/xen/include/public/platform.h
+++ b/xen/include/public/platform.h
@@ -504,6 +504,16 @@ struct xenpf_core_parking {
 typedef struct xenpf_core_parking xenpf_core_parking_t;
 DEFINE_XEN_GUEST_HANDLE(xenpf_core_parking_t);
 
+#define XENPF_get_cpu_freq        ('N' << 24)
+#define XENPF_get_cpu_freq_min    (XENPF_get_cpu_freq + 1)
+#define XENPF_get_cpu_freq_max    (XENPF_get_cpu_freq_min + 1)
+struct xenpf_get_cpu_freq {
+    /* IN variables */
+    uint32_t vcpu;
+    /* OUT variables */
+    uint32_t freq; /* in kHz */
+};
+
 /*
  * ` enum neg_errnoval
  * ` HYPERVISOR_platform_op(const struct xen_platform_op*);
@@ -530,6 +540,7 @@ struct xen_platform_op {
         struct xenpf_cpu_hotadd        cpu_add;
         struct xenpf_mem_hotadd        mem_add;
         struct xenpf_core_parking      core_parking;
+        struct xenpf_get_cpu_freq      get_cpu_freq;
         uint8_t                        pad[128];
     } u;
 };