Differential D5958 Diff 15214 sys/boot/i386/libi386/i386_module.c

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	#include <sys/cdefs.h>			#include <sys/cdefs.h>
	__FBSDID("$FreeBSD$");			__FBSDID("$FreeBSD$");

	/*			/*
	* i386-specific module functionality.			* i386-specific module functionality.
	*			*
	*/			*/
				#include <bootstrap.h>
				#include <stand.h>
				#include <string.h>
				#include <machine/cpufunc.h>

				#define HV_UNKNOWN 0
				#define HV_XEN 1
				#define HV_HYPERV 2

				/* See the kernel's function identify_hypervisor(). */
				static int
				get_hypervisor(void)
				{
				unsigned int regs[4];
				char hv_vendor[13];

				do_cpuid(1, regs);
				if (regs[2] & 0x80000000) {
				do_cpuid(0x40000000, regs);
				if (regs[0] >= 0x40000000) {
				((u_int *)&hv_vendor)[0] = regs[1];
				((u_int *)&hv_vendor)[1] = regs[2];
				((u_int *)&hv_vendor)[2] = regs[3];
				hv_vendor[12] = '\0';
				if (strcmp(hv_vendor, "Microsoft Hv") == 0)
				return (HV_HYPERV);
				}
				}

				return (HV_UNKNOWN);
				}

	/*			/*
	* Use voodoo to load modules required by current hardware.			* Use voodoo to load modules required by current hardware.
	*/			*/
	int			int
	i386_autoload(void)			i386_autoload(void)
	{			{
				switch(get_hypervisor()) {
				case HV_HYPERV:
				mod_loadkld("hyperv.ko", 0, NULL);
				break;
				default:
				break;
				}

	/* XXX use PnP to locate stuff here */			/* XXX use PnP to locate stuff here */
	return(0);			return(0);
	}			}