static inline void __cpuinit
detect_hypervisor_vendor(struct cpuinfo_x86 *c)
{
if (vmware_platform()) {
c->x86_hyper_vendor = X86_HYPER_VENDOR_VMWARE;
} else if (kvm_para_available()) {
c->x86_hyper_vendor = X86_HYPER_VENDOR_KVM;
} else {
c->x86_hyper_vendor = X86_HYPER_VENDOR_NONE;
}
}
unsigned long vmware_get_tsc_khz(void)
{
unsigned long vm_tsc_khz;
BUG_ON(!vmware_platform());
/* Enable "lazy" timer emulation. Rather than holding
* back virtual time when timer interrupt delivery falls
* behind and attempting to "catch up", in lazy mode,
* missed periodic interrupts are skipped and virtual
* time always reflects real time.
*/
vm_tsc_khz = __vmware_get_tsc_khz();
#ifdef CONFIG_X86_64
{
extern int timekeeping_use_tsc;
if (vm_tsc_khz && timekeeping_use_tsc >= 0) {
if (vmware_enable_lazy_timer_emulation()) {
timekeeping_use_tsc = 1;
/*
* Disable softlockups if using TSC based
* timekeeping, as this may have false
* positives when running under hypervisors.
*/
nosoftlockup = 1;
}
else {
printk(KERN_WARNING
"time.c: failed to enable lazy timer "
"emulation. Disabling tsc based "
"timekeeping\n");
timekeeping_use_tsc = 0;
}
}
}
#else
if (vm_tsc_khz) {
if (!vmware_enable_lazy_timer_emulation())
printk(KERN_WARNING
"time.c: failed to enable lazy timer "
"emulation. Disabling tsc based "
"timekeeping\n");
}
#endif
return vm_tsc_khz;
}
unsigned long vmware_get_tsc_khz(void)
{
BUG_ON(!vmware_platform());
return __vmware_get_tsc_khz();
}
