# X64 - Introduction & System Management Interrupts (SMIs)

[TOC]

## References

### [Arch4001 06 SMM 01 Intro 01 SMM Intro](https://youtu.be/yt5sMzuCGG4)

{%youtube yt5sMzuCGG4 %}

### [Arch4001 06 SMM 01 Intro 02 SMI Source 1 BLE](https://youtu.be/umgpLJ9yjn8)

{%youtube umgpLJ9yjn8 %}

### [Arch4001 06 SMM 01 Intro 03 SMI Status Flags](https://youtu.be/4jfsm91CS0s)

{%youtube 4jfsm91CS0s %}

### [Arch4001 06 SMM 01 Intro 04 SMI Source 2 0xB2](https://youtu.be/KqU5cx3EWzk)

{%youtube KqU5cx3EWzk %}

### [Arch4001 06 SMM 01 Intro 05 SMI Source3 FSMIE](https://youtu.be/qSBjvignzR0)

{%youtube qSBjvignzR0 %}

### [Arch4001 06 SMM 01 Intro 06 SMI Source 4 Periodic SMI](https://youtu.be/Ps0HhBTzkP0)

{%youtube Ps0HhBTzkP0 %}

### [Arch4001 06 SMM 01 Intro 07 MSR SMI COUNT](https://youtu.be/KRJCYYAz1QE)

{%youtube KRJCYYAz1QE %}

### [Arch4001 06 SMM 01 Intro 08 Final Entry Exit Summary](https://youtu.be/24stzwojh2k)

{%youtube 24stzwojh2k %}

## Notes

### Introduction

### Highlighted Causes of SMI 1: BIOS Lock Enable

### How SMI Handler Knows What to Handle

### Highlighted Causes of SMI 2: Advanced Power Management (APM) port 0xB2

### Highlighted Causes of SMI 3: FSMIE bit

### Highlighted Causes of SMI 4: Periodic SMIs

### SMI Counter MSR

### SMM Entry/Exit Conclusion