x86.h File Reference

X86 inline asm utilities and defines. More...

Macros
#define	MSR_IA32_EFER   0xc0000080
	Extended features enables.
#define	MSR_IA32_STAR   0xc0000081
	System call segment selectors MSR.
#define	MSR_IA32_LSTAR   0xc0000082
	System call target address MSR.
#define	MSR_IA32_FMASK   0xc0000084
	System call flag mask MSR.
#define	MSR_IA32_FSBASE   0xc0000100
	64-bit FS base register
#define	MSR_IA32_GSBASE   0xc0000101
	64-bit GS base register
#define	MSR_AMD_HWCR   0xc0010015
	AMD hardware configuration.
#define	MSR_AMD_VMCR   0xc0010114
	Global aspects of SVM.
#define	MSR_AMD_VM_HSAVE   0xc0010117
	Physical address of host save area.
#define	IA32_EFER_SCE   (1 << 0)
	Fast system call enable.
#define	IA32_EFER_LME   (1 << 8)
	Long mode enable.
#define	IA32_EFER_LMA   (1 << 10)
	Long mode active.
#define	IA32_EFER_NXE   (1 << 11)
	No execute enable.
#define	IA32_EFER_SVME   (1 << 12)
	Switch to enable/disable SVM.
#define	AMD_HWCR_FFDIS   (1 << 6)
	TLB flush filter.
#define	AMD_VMCR_SVMDIS   (1 << 4)
	SVM disabled indicator.

Functions
bool	has_monitor_mwait (void)
	Detects monitor/mwait support. More...
void	monitor_mwait (lvaddr_t base, uint64_t lastval, uint32_t extensions, uint32_t hints)
	Use MONITOR/MWAIT to block until a given word changes. More...

Detailed Description

X86 inline asm utilities and defines.

Function Documentation

bool has_monitor_mwait

(

void

)

Detects monitor/mwait support.

Note

Result is cached for subsequent calls to this function.

Return values

true	monitor/mwait is supported on this core
false	monitor/mwait is not supported on this core

void monitor_mwait	(	lvaddr_t	base,
		uint64_t	lastval,
		uint32_t	extensions,
		uint32_t	hints
	)

Use MONITOR/MWAIT to block until a given word changes.

Parameters

base	Virtual address of 64-bit word to monitor
lastval	Previous value of word
extensions	Processor-specific extensions (zero for defaults)
hints	Processor-specific hints (zero for defaults)

Returns when the 64-bit word at base is not equal to lastval.