Esempio n. 1
0
File: vmware.c Progetto: 59psi/linux
/* 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;
}
Esempio n. 2
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 {
Esempio n. 3
0
File: vmware.c Progetto: 59psi/linux
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");
}
Esempio n. 4
0
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;
}
Esempio n. 5
0
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;
}
Esempio n. 6
0
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;
}
Esempio n. 7
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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;
}
Esempio n. 8
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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;
}