Function xen_hvm_cpuid_base

freebsd/x86/xen/hvm.c:115–127

static uint32_t cpuid_base;

static uint32_t
xen_hvm_cpuid_base(void)
{
	uint32_t base, regs[4];

	for (base = 0x40000000; base < 0x40010000; base += 0x100) {
		do_cpuid(base, regs);
		if (!memcmp("XenVMMXenVMM", &regs[1], 12)
		    && (regs[0] - base) >= 2)
			return (base);
	}
	return (0);
}

static void
hypervisor_quirks(unsigned int major, unsigned int minor)