visor/include/x86/msr.h

#ifndef _VISOR_MSR_H_
#define _VISOR_MSR_H_

#include <stdint.h>

#define IA32_FEATURE_CONTROL    0x3A

#define IA32_VMX_BASIC          0x480
#define IA32_VMX_PINBASED_CTLS  0x481
#define IA32_VMX_PROCBASED_CTLS 0x482
#define IA32_VMX_EXIT_CTLS      0x483
#define IA32_VMX_ENTRY_CTLS     0x484
#define IA32_VMX_MISC           0x485
#define IA32_VMX_CR0_FIXED0     0x486
#define IA32_VMX_CR0_FIXED1     0x487
#define IA32_VMX_CR4_FIXED0     0x488
#define IA32_VMX_CR4_FIXED1     0x489
#define IA32_VMX_VMCS_ENUM      0x48A

static inline uint32_t
rdmsr32(uint32_t msr)
{
	uint32_t value;
	__asm__ ("rdmsr\n\t" : "=a"(value) : "c"(msr) : "edx");
	return value;
}

static inline uint64_t
rdmsr64(uint32_t msr)
{
	uint64_t value;
	__asm__ ("rdmsr\n\t" : "=A"(value) : "c"(msr));
	return value;
}

static inline void
wrmsr32(uint32_t msr, uint32_t value)
{
	uint32_t high = 0;
	__asm__ ("wrmsr\n\t" :: "c"(msr), "a"(value), "d"(high));
}

static inline void
wrmsr64(uint32_t msr, uint64_t value)
{
	__asm__ ("wrmsr\n\t" :: "c"(msr), "A"(value));
}

#endif