blob: 432c61089b5e2acda1faa968f5c08bcc4d56f8e0 [file] [log] [blame]
Note: This testdata is from Linux kernel arch/x86/kernle/kvm.c with some
arbitrary modifications for testing the Fuzzyc (including this text).
#include <asm/desc.h>
#include <asm/tlbflush.h>
#include <asm/apic.h>
#include <asm/apicdef.h>
#include <asm/hypervisor.h>
#include <asm/tlb.h>
static int kvmapf = 1;
static int __init parse_no_kvmapf(char *arg)
{
kvmapf = 0;
return 0;
}
early_param("no-kvmapf", parse_no_kvmapf);
static int steal_acc = 1;
static int __init parse_no_stealacc(char *arg)
{
steal_acc = 0;
return 0;
}
early_param("no-steal-acc", parse_no_stealacc);
static DEFINE_PER_CPU_DECRYPTED(struct kvm_vcpu_pv_apf_data, apf_reason) __aligned(64);
static DEFINE_PER_CPU_DECRYPTED(struct kvm_steal_time, steal_time) __aligned(64);
static int has_steal_clock = 0;
...
...
...
/*
* @interrupt_kernel: Is this called from a routine which interrupts the kernel
* (other than user space)?
*/
void kvm_async_pf_task_wait(u32 token, int interrupt_kernel)
{
u32 key = hash_32(token, KVM_TASK_SLEEP_HASHBITS);
struct kvm_task_sleep_head *b = &async_pf_sleepers[key];
struct kvm_task_sleep_node n, *e;
DECLARE_SWAITQUEUE(wait);
rcu_irq_enter();
raw_spin_lock(&b->lock);
e = _find_apf_task(b, token);
if (e) {
/* dummy entry exist -> wake up was delivered ahead of PF */
hlist_del(&e->link);
kfree(e);
raw_spin_unlock(&b->lock);
rcu_irq_exit();
return;
}
n.token = token;
n.cpu = smp_processor_id();
n.halted = is_idle_task(current) ||
(IS_ENABLED(CONFIG_PREEMPT_COUNT)
? preempt_count() > 1 || rcu_preempt_depth()
: interrupt_kernel);
init_swait_queue_head(&n.wq);
hlist_add_head(&n.link, &b->list);
raw_spin_unlock(&b->lock);
for (;;) {
if (!n.halted)
prepare_to_swait_exclusive(&n.wq, &wait, TASK_UNINTERRUPTIBLE);
if (hlist_unhashed(&n.link))
break;
rcu_irq_exit();
if (!n.halted) {
local_irq_enable();
schedule();
local_irq_disable();
} else {
/*
* We cannot reschedule. So halt.
*/
native_safe_halt();
local_irq_disable();
}
rcu_irq_enter();
}
if (!n.halted)
finish_swait(&n.wq, &wait);
rcu_irq_exit();
return;
}
EXPORT_SYMBOL_GPL(kvm_async_pf_task_wait);
...
static void __init paravirt_ops_setup(void)
{
pv_info.name = "KVM";
if (kvm_para_has_feature(KVM_FEATURE_NOP_IO_DELAY))
pv_ops.cpu.io_delay = kvm_io_delay;
#ifdef CONFIG_X86_IO_APIC
no_timer_check = 1;
#endif
}
...
more code comes but not interested.