KVM: use cpumask_var_t for cpus_hardware_enabled

This changes cpus_hardware_enabled from a cpumask_t to a cpumask_var_t:
equivalent for CONFIG_CPUMASKS_OFFSTACK=n, otherwise dynamically allocated.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 14 insertions, 6 deletions

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 2d6ca7968d65..e7644b90667e 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -70,7 +70,7 @@ module_param(msi2intx, bool, 0);
 DEFINE_SPINLOCK(kvm_lock);
 LIST_HEAD(vm_list);
 
-static cpumask_t cpus_hardware_enabled;
+static cpumask_var_t cpus_hardware_enabled;
 
 struct kmem_cache *kvm_vcpu_cache;
 EXPORT_SYMBOL_GPL(kvm_vcpu_cache);
@@ -1965,9 +1965,9 @@ static void hardware_enable(void *junk)
 {
         int cpu = raw_smp_processor_id();
 
-        if (cpu_isset(cpu, cpus_hardware_enabled))
+        if (cpumask_test_cpu(cpu, cpus_hardware_enabled))
                 return;
-        cpu_set(cpu, cpus_hardware_enabled);
+        cpumask_set_cpu(cpu, cpus_hardware_enabled);
         kvm_arch_hardware_enable(NULL);
 }
 
@@ -1975,9 +1975,9 @@ static void hardware_disable(void *junk)
 {
         int cpu = raw_smp_processor_id();
 
-        if (!cpu_isset(cpu, cpus_hardware_enabled))
+        if (!cpumask_test_cpu(cpu, cpus_hardware_enabled))
                 return;
-        cpu_clear(cpu, cpus_hardware_enabled);
+        cpumask_clear_cpu(cpu, cpus_hardware_enabled);
         kvm_arch_hardware_disable(NULL);
 }
 
@@ -2211,9 +2211,14 @@ int kvm_init(void *opaque, unsigned int vcpu_size,
 
         bad_pfn = page_to_pfn(bad_page);
 
+        if (!alloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) {
+                r = -ENOMEM;
+                goto out_free_0;
+        }
+
         r = kvm_arch_hardware_setup();
         if (r < 0)
-                goto out_free_0;
+                goto out_free_0a;
 
         for_each_online_cpu(cpu) {
                 smp_call_function_single(cpu,
@@ -2277,6 +2282,8 @@ out_free_2:
         on_each_cpu(hardware_disable, NULL, 1);
 out_free_1:
         kvm_arch_hardware_unsetup();
+out_free_0a:
+        free_cpumask_var(cpus_hardware_enabled);
 out_free_0:
         __free_page(bad_page);
 out:
@@ -2300,6 +2307,7 @@ void kvm_exit(void)
         kvm_arch_hardware_unsetup();
         kvm_arch_exit();
         kvm_exit_debug();
+        free_cpumask_var(cpus_hardware_enabled);
         __free_page(bad_page);
 }
 EXPORT_SYMBOL_GPL(kvm_exit);