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sys/boot/i386/libi386/i386_module.c
| Context not available. | |||||
| * | * | ||||
| */ | */ | ||||
| #include <stand.h> | |||||
| #include <string.h> | |||||
| #include <machine/cpufunc.h> | |||||
| /* See the kernel's function identify_hypervisor(). */ | |||||
| static int | |||||
| running_on_hypervisor(void) | |||||
| { | |||||
| unsigned int regs[4]; | |||||
| do_cpuid(1, regs); | |||||
| return (regs[2] & 0x80000000); | |||||
| } | |||||
| /* | /* | ||||
| * 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) | ||||
| { | { | ||||
| if (running_on_hypervisor()) { | |||||
| /* | |||||
| * vt(4)'s graphics mode is slow when FreeBSD guest runs on | |||||
| * hypervisors, especially on Hyper-V (e.g., 1 line of boot message | |||||
| * per second), but luckily vt(4) is fast enough in text mode. | |||||
| */ | |||||
| if (getenv("hw.vga.textmode") == NULL) | |||||
| setenv("hw.vga.textmode", "1", 1); | |||||
| } | |||||
| /* XXX use PnP to locate stuff here */ | /* XXX use PnP to locate stuff here */ | ||||
| return(0); | return(0); | ||||
| Context not available. | |||||