/* Checks if hypervisor supports x2apic without VT-D interrupt remapping. */
static bool __init vmware_legacy_x2apic_available(void)
{
uint32_t eax, ebx, ecx, edx;
VMWARE_PORT(GETVCPU_INFO, eax, ebx, ecx, edx);
return (eax & (1 << VMWARE_PORT_CMD_VCPU_RESERVED)) == 0 &&
(eax & (1 << VMWARE_PORT_CMD_LEGACY_X2APIC)) != 0;
}
static void __init vmware_platform_setup(void)
{
uint32_t eax, ebx, ecx, edx;
uint64_t lpj, tsc_khz;
VMWARE_PORT(GETHZ, eax, ebx, ecx, edx);
if (ebx != UINT_MAX) {
lpj = tsc_khz = eax | (((uint64_t)ebx) << 32);
do_div(tsc_khz, 1000);
WARN_ON(tsc_khz >> 32);
pr_info("TSC freq read from hypervisor : %lu.%03lu MHz\n",
(unsigned long) tsc_khz / 1000,
(unsigned long) tsc_khz % 1000);
if (!preset_lpj) {
do_div(lpj, HZ);
preset_lpj = lpj;
}
vmware_tsc_khz = tsc_khz;
x86_platform.calibrate_tsc = vmware_get_tsc_khz;
x86_platform.calibrate_cpu = vmware_get_tsc_khz;
#ifdef CONFIG_X86_LOCAL_APIC
/* Skip lapic calibration since we know the bus frequency. */
lapic_timer_frequency = ecx / HZ;
pr_info("Host bus clock speed read from hypervisor : %u Hz\n",
ecx);
#endif
} else {
static void __init vmware_platform_setup(void)
{
uint32_t eax, ebx, ecx, edx;
VMWARE_PORT(GETHZ, eax, ebx, ecx, edx);
if (ebx != UINT_MAX)
x86_platform.calibrate_tsc = vmware_get_tsc_khz;
else
printk(KERN_WARNING
"Failed to get TSC freq from the hypervisor\n");
}
static unsigned long __vmware_get_tsc_khz(void)
{
uint64_t tsc_hz;
uint32_t eax, ebx, ecx, edx;
VMWARE_PORT(GETHZ, eax, ebx, ecx, edx);
if (ebx == UINT_MAX)
return 0;
tsc_hz = eax | (((uint64_t)ebx) << 32);
do_div(tsc_hz, 1000);
BUG_ON(tsc_hz >> 32);
return tsc_hz;
}
static void __init vmware_platform_setup(void)
{
uint32_t eax, ebx, ecx, edx;
VMWARE_PORT(GETHZ, eax, ebx, ecx, edx);
if (ebx != UINT_MAX)
x86_platform.calibrate_tsc = vmware_get_tsc_khz;
else
printk(KERN_WARNING
"Failed to get TSC freq from the hypervisor\n");
/* NMI watchdog uses perfctrs, but they are not present. */
nmi_watchdog = NMI_NONE;
}
static unsigned long vmware_get_tsc_khz(void)
{
uint64_t tsc_hz, lpj;
uint32_t eax, ebx, ecx, edx;
VMWARE_PORT(GETHZ, eax, ebx, ecx, edx);
tsc_hz = eax | (((uint64_t)ebx) << 32);
do_div(tsc_hz, 1000);
BUG_ON(tsc_hz >> 32);
printk(KERN_INFO "TSC freq read from hypervisor : %lu.%03lu MHz\n",
(unsigned long) tsc_hz / 1000,
(unsigned long) tsc_hz % 1000);
if (!preset_lpj) {
lpj = ((u64)tsc_hz * 1000);
do_div(lpj, HZ);
preset_lpj = lpj;
}
return tsc_hz;
}
static inline int __vmware_platform(void)
{
uint32_t eax, ebx, ecx, edx;
VMWARE_PORT(GETVERSION, eax, ebx, ecx, edx);
return eax != (uint32_t)-1 && ebx == VMWARE_HYPERVISOR_MAGIC;
}
static inline int vmware_enable_lazy_timer_emulation(void)
{
uint32_t eax, ebx, ecx, edx;
VMWARE_PORT(LAZYTIMEREMULATION, eax, ebx, ecx, edx);
return ebx == VMWARE_HYPERVISOR_MAGIC;
}