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Linux I/O Port Access Checks on x86_64
https://u1f383.github.io/linux/2025/09/02/linux-io-port-access-checks-on-x86_64.html
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While reading the article Kernel Blues, or Why x86 Is So Convoluted, I realized that my understanding of the restrictions on I/O port access in x86-64 was still incomplete. This post is therefore intended to document my thought process and analysis.
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