[Qemu-devel] [PATCH RFC 2/2] Add an ioctl to pass the entitlement information from qemu to the hypervisor.

[Michael Wolf <mjw@linux.vnet.ibm.com>]

Add KVM_SET_ENTITLEMENT ioctl to pass the entitlement to the hypervisor.

Signed-off-by: Michael Wolf <mjw@linux.vnet.ibm.com>
---
 cpu-defs.h                |    1 +
 cpus.c                    |    1 +
 cpus.h                    |    1 +
 kvm-all.c                 |    1 +
 linux-headers/linux/kvm.h |    2 ++
 5 files changed, 6 insertions(+)

diff --git a/cpu-defs.h b/cpu-defs.h
index 4018b88..ae24e8e 100644
--- a/cpu-defs.h
+++ b/cpu-defs.h
@@ -200,6 +200,7 @@ typedef struct CPUWatchpoint {
     int numa_node; /* NUMA node this cpu is belonging to  */            \
     int nr_cores;  /* number of cores within this CPU package */        \
     int nr_threads;/* number of threads within this CPU */              \
+    int cpu_entitlement; /* the % of the pcpu that the vcpu receives */ \
     int running; /* Nonzero if cpu is currently running(usermode).  */  \
     int thread_id;                                                      \
     /* user data */                                                     \
diff --git a/cpus.c b/cpus.c
index e476a3c..ef8b762 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1042,6 +1042,7 @@ void qemu_init_vcpu(void *_env)
 
     env->nr_cores = smp_cores;
     env->nr_threads = smp_threads;
+    env->cpu_entitlement = cpu_entitlement;
     env->stopped = 1;
     if (kvm_enabled()) {
         qemu_kvm_start_vcpu(env);
diff --git a/cpus.h b/cpus.h
index 81bd817..704d6df 100644
--- a/cpus.h
+++ b/cpus.h
@@ -16,6 +16,7 @@ void qtest_clock_warp(int64_t dest);
 /* vl.c */
 extern int smp_cores;
 extern int smp_threads;
+extern int cpu_entitlement;
 void set_numa_modes(void);
 void set_cpu_log(const char *optarg);
 void set_cpu_log_filename(const char *optarg);
diff --git a/kvm-all.c b/kvm-all.c
index 34b02c1..dee1b9b 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -246,6 +246,7 @@ int kvm_init_vcpu(CPUArchState *env)
         s->coalesced_mmio_ring =
             (void *)env->kvm_run + s->coalesced_mmio * PAGE_SIZE;
     }
+    kvm_vm_ioctl(s, KVM_SET_ENTITLEMENT, env->cpu_entitlement);
 
     ret = kvm_arch_init_vcpu(env);
     if (ret == 0) {
diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index 5a9d4e3..46dbde5 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -901,6 +901,8 @@ struct kvm_s390_ucas_mapping {
 #define KVM_SET_ONE_REG		  _IOW(KVMIO,  0xac, struct kvm_one_reg)
 /* VM is being stopped by host */
 #define KVM_KVMCLOCK_CTRL	  _IO(KVMIO,   0xad)
+/* Set the cpu entitlement this will be used to adjust stealtime reporting */
+#define KVM_SET_ENTITLEMENT       _IOW(KVMIO, 0xae, unsigned long)
 
 #define KVM_DEV_ASSIGN_ENABLE_IOMMU	(1 << 0)
 #define KVM_DEV_ASSIGN_PCI_2_3		(1 << 1)