target-i386: Move hyperv_* static globals to X86CPU

- since hyperv_* helper functions are used only in target-i386/kvm.c
  move them there as static helpers

Requested-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>

target-i386/Makefile.objs

@@ -3,7 +3,7 @@ obj-y += excp_helper.o fpu_helper.o cc_helper.o int_helper.o svm_helper.o
 obj-y += smm_helper.o misc_helper.o mem_helper.o seg_helper.o
 obj-y += gdbstub.o
 obj-$(CONFIG_SOFTMMU) += machine.o arch_memory_mapping.o arch_dump.o
-obj-$(CONFIG_KVM) += kvm.o hyperv.o
+obj-$(CONFIG_KVM) += kvm.o
 obj-$(CONFIG_NO_KVM) += kvm-stub.o
 obj-$(CONFIG_LINUX_USER) += ioport-user.o
 obj-$(CONFIG_BSD_USER) += ioport-user.o

target-i386/cpu-qom.h

@@ -66,6 +66,10 @@ typedef struct X86CPU {
 
     CPUX86State env;
 
+    bool hyperv_vapic;
+    bool hyperv_relaxed_timing;
+    int hyperv_spinlock_attempts;
+
     /* Features that were filtered out because of missing host capabilities */
     uint32_t filtered_features[FEATURE_WORDS];
 

target-i386/cpu.c

@@ -35,8 +35,6 @@
 #include "qapi/visitor.h"
 #include "sysemu/arch_init.h"
 
-#include "hyperv.h"
-
 #include "hw/hw.h"
 #if defined(CONFIG_KVM)
 #include <linux/kvm_para.h>
@@ -1591,12 +1589,19 @@ static void cpu_x86_parse_featurestr(X86CPU *cpu, char *features, Error **errp)
                 object_property_parse(OBJECT(cpu), num, "tsc-frequency", errp);
             } else if (!strcmp(featurestr, "hv-spinlocks")) {
                 char *err;
+                const int min = 0xFFF;
                 numvalue = strtoul(val, &err, 0);
                 if (!*val || *err) {
                     error_setg(errp, "bad numerical value %s", val);
                     goto out;
                 }
-                hyperv_set_spinlock_retries(numvalue);
+                if (numvalue < min) {
+                    fprintf(stderr, "hv-spinlocks value shall always be >= 0x%x"
+                            ", fixup will be removed in future versions\n",
+                            min);
+                    numvalue = min;
+                }
+                cpu->hyperv_spinlock_attempts = numvalue;
             } else {
                 error_setg(errp, "unrecognized feature %s", featurestr);
                 goto out;
@@ -1606,9 +1611,9 @@ static void cpu_x86_parse_featurestr(X86CPU *cpu, char *features, Error **errp)
         } else if (!strcmp(featurestr, "enforce")) {
             check_cpuid = enforce_cpuid = 1;
         } else if (!strcmp(featurestr, "hv_relaxed")) {
-            hyperv_enable_relaxed_timing(true);
+            cpu->hyperv_relaxed_timing = true;
         } else if (!strcmp(featurestr, "hv_vapic")) {
-            hyperv_enable_vapic_recommended(true);
+            cpu->hyperv_vapic = true;
         } else {
             error_setg(errp, "feature string `%s' not in format (+feature|"
                        "-feature|feature=xyz)", featurestr);
@@ -2489,6 +2494,7 @@ static void x86_cpu_initfn(Object *obj)
                         x86_cpu_get_feature_words,
                         NULL, NULL, (void *)cpu->filtered_features, NULL);
 
+    cpu->hyperv_spinlock_attempts = HYPERV_SPINLOCK_NEVER_RETRY;
     env->cpuid_apic_id = x86_cpu_apic_id_from_index(cs->cpu_index);
 
     /* init various static tables used in TCG mode */

target-i386/cpu.h

@@ -549,6 +549,10 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS];
 #define CPUID_MWAIT_IBE     (1 << 1) /* Interrupts can exit capability */
 #define CPUID_MWAIT_EMX     (1 << 0) /* enumeration supported */
 
+#ifndef HYPERV_SPINLOCK_NEVER_RETRY
+#define HYPERV_SPINLOCK_NEVER_RETRY             0xFFFFFFFF
+#endif
+
 #define EXCP00_DIVZ	0
 #define EXCP01_DB	1
 #define EXCP02_NMI	2

target-i386/hyperv.c

@@ -1,64 +0,0 @@
-/*
- * QEMU Hyper-V support
- *
- * Copyright Red Hat, Inc. 2011
- *
- * Author: Vadim Rozenfeld     <vrozenfe@redhat.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2 or later.
- * See the COPYING file in the top-level directory.
- *
- */
-
-#include "hyperv.h"
-
-static bool hyperv_vapic;
-static bool hyperv_relaxed_timing;
-static int hyperv_spinlock_attempts = HYPERV_SPINLOCK_NEVER_RETRY;
-
-void hyperv_enable_vapic_recommended(bool val)
-{
-    hyperv_vapic = val;
-}
-
-void hyperv_enable_relaxed_timing(bool val)
-{
-    hyperv_relaxed_timing = val;
-}
-
-void hyperv_set_spinlock_retries(int val)
-{
-    hyperv_spinlock_attempts = val;
-    if (hyperv_spinlock_attempts < 0xFFF) {
-        hyperv_spinlock_attempts = 0xFFF;
-    }
-}
-
-bool hyperv_enabled(void)
-{
-    return hyperv_hypercall_available() || hyperv_relaxed_timing_enabled();
-}
-
-bool hyperv_hypercall_available(void)
-{
-    if (hyperv_vapic ||
-        (hyperv_spinlock_attempts != HYPERV_SPINLOCK_NEVER_RETRY)) {
-      return true;
-    }
-    return false;
-}
-
-bool hyperv_vapic_recommended(void)
-{
-    return hyperv_vapic;
-}
-
-bool hyperv_relaxed_timing_enabled(void)
-{
-    return hyperv_relaxed_timing;
-}
-
-int hyperv_get_spinlock_retries(void)
-{
-    return hyperv_spinlock_attempts;
-}

target-i386/hyperv.h

@@ -1,45 +0,0 @@
-/*
- * QEMU Hyper-V support
- *
- * Copyright Red Hat, Inc. 2011
- *
- * Author: Vadim Rozenfeld     <vrozenfe@redhat.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2 or later.
- * See the COPYING file in the top-level directory.
- *
- */
-
-#ifndef QEMU_HW_HYPERV_H
-#define QEMU_HW_HYPERV_H 1
-
-#include "qemu-common.h"
-#ifdef CONFIG_KVM
-#include <asm/hyperv.h>
-#endif
-
-#ifndef HYPERV_SPINLOCK_NEVER_RETRY
-#define HYPERV_SPINLOCK_NEVER_RETRY             0xFFFFFFFF
-#endif
-
-#ifndef KVM_CPUID_SIGNATURE_NEXT
-#define KVM_CPUID_SIGNATURE_NEXT                0x40000100
-#endif
-
-#if !defined(CONFIG_USER_ONLY) && defined(CONFIG_KVM)
-void hyperv_enable_vapic_recommended(bool val);
-void hyperv_enable_relaxed_timing(bool val);
-void hyperv_set_spinlock_retries(int val);
-#else
-static inline void hyperv_enable_vapic_recommended(bool val) { }
-static inline void hyperv_enable_relaxed_timing(bool val) { }
-static inline void hyperv_set_spinlock_retries(int val) { }
-#endif
-
-bool hyperv_enabled(void);
-bool hyperv_hypercall_available(void);
-bool hyperv_vapic_recommended(void);
-bool hyperv_relaxed_timing_enabled(void);
-int hyperv_get_spinlock_retries(void);
-
-#endif /* QEMU_HW_HYPERV_H */

target-i386/kvm.c

@@ -31,7 +31,7 @@
 #include "hw/i386/pc.h"
 #include "hw/i386/apic.h"
 #include "exec/ioport.h"
-#include "hyperv.h"
+#include <asm/hyperv.h>
 #include "hw/pci/pci.h"
 
 //#define DEBUG_KVM
@@ -420,6 +420,22 @@ unsigned long kvm_arch_vcpu_id(CPUState *cs)
     return cpu->env.cpuid_apic_id;
 }
 
+#ifndef KVM_CPUID_SIGNATURE_NEXT
+#define KVM_CPUID_SIGNATURE_NEXT                0x40000100
+#endif
+
+static bool hyperv_hypercall_available(X86CPU *cpu)
+{
+    return cpu->hyperv_vapic ||
+           (cpu->hyperv_spinlock_attempts != HYPERV_SPINLOCK_NEVER_RETRY);
+}
+
+static bool hyperv_enabled(X86CPU *cpu)
+{
+    return hyperv_hypercall_available(cpu) ||
+           cpu->hyperv_relaxed_timing;
+}
+
 #define KVM_MAX_CPUID_ENTRIES  100
 
 int kvm_arch_init_vcpu(CPUState *cs)
@@ -442,7 +458,7 @@ int kvm_arch_init_vcpu(CPUState *cs)
     c = &cpuid_data.entries[cpuid_i++];
     memset(c, 0, sizeof(*c));
     c->function = KVM_CPUID_SIGNATURE;
-    if (!hyperv_enabled()) {
+    if (!hyperv_enabled(cpu)) {
         memcpy(signature, "KVMKVMKVM\0\0\0", 12);
         c->eax = 0;
     } else {
@@ -458,7 +474,7 @@ int kvm_arch_init_vcpu(CPUState *cs)
     c->function = KVM_CPUID_FEATURES;
     c->eax = env->features[FEAT_KVM];
 
-    if (hyperv_enabled()) {
+    if (hyperv_enabled(cpu)) {
         memcpy(signature, "Hv#1\0\0\0\0\0\0\0\0", 12);
         c->eax = signature[0];
 
@@ -471,10 +487,10 @@ int kvm_arch_init_vcpu(CPUState *cs)
         c = &cpuid_data.entries[cpuid_i++];
         memset(c, 0, sizeof(*c));
         c->function = HYPERV_CPUID_FEATURES;
-        if (hyperv_relaxed_timing_enabled()) {
+        if (cpu->hyperv_relaxed_timing) {
             c->eax |= HV_X64_MSR_HYPERCALL_AVAILABLE;
         }
-        if (hyperv_vapic_recommended()) {
+        if (cpu->hyperv_vapic) {
             c->eax |= HV_X64_MSR_HYPERCALL_AVAILABLE;
             c->eax |= HV_X64_MSR_APIC_ACCESS_AVAILABLE;
         }
@@ -482,13 +498,13 @@ int kvm_arch_init_vcpu(CPUState *cs)
         c = &cpuid_data.entries[cpuid_i++];
         memset(c, 0, sizeof(*c));
         c->function = HYPERV_CPUID_ENLIGHTMENT_INFO;
-        if (hyperv_relaxed_timing_enabled()) {
+        if (cpu->hyperv_relaxed_timing) {
             c->eax |= HV_X64_RELAXED_TIMING_RECOMMENDED;
         }
-        if (hyperv_vapic_recommended()) {
+        if (cpu->hyperv_vapic) {
             c->eax |= HV_X64_APIC_ACCESS_RECOMMENDED;
         }
-        c->ebx = hyperv_get_spinlock_retries();
+        c->ebx = cpu->hyperv_spinlock_attempts;
 
         c = &cpuid_data.entries[cpuid_i++];
         memset(c, 0, sizeof(*c));
@@ -1114,11 +1130,11 @@ static int kvm_put_msrs(X86CPU *cpu, int level)
             kvm_msr_entry_set(&msrs[n++], MSR_KVM_STEAL_TIME,
                               env->steal_time_msr);
         }
-        if (hyperv_hypercall_available()) {
+        if (hyperv_hypercall_available(cpu)) {
             kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_GUEST_OS_ID, 0);
             kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_HYPERCALL, 0);
         }
-        if (hyperv_vapic_recommended()) {
+        if (cpu->hyperv_vapic) {
             kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_APIC_ASSIST_PAGE, 0);
         }
     }