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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>
This commit is contained in:
Rusty Russell 2008-12-07 21:25:45 +10:30 committed by Avi Kivity
parent 6ef7a1bc45
commit 7f59f492da
1 changed files with 14 additions and 6 deletions
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20
virt/kvm/kvm_main.c
View File

@ -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);