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Phoronix0 Hot0 comments1 min read
Linux 7.4 Adapts AMD Zen 6 For Less Costly CPU Security Mitigation
AI summary
Linux 7.4 tận dụng BTB CTX isolation của AMD Zen 6 để thay thế cho việc sử dụng mitigation SRSO SafeRET tốn kém. Việc này có thể thực hiện vì Zen 6 đã có Branch Target Buffer với per-context tagging, giúp cách ly user/kernel và guest/host contexts. Patch này đã được đưa vào x86/bugs pull request cho Linux 7.4, đồng thời cũng khắc phục việc báo cáo mitigation Spectre v2 cho các build RETPOLINE=n. Vẫn chưa rõ liệu patch có được backport sang các series kernel stable trước đó hay không.
AI summaries can be wrong. Read the original before relying on anything important.
Why read it: Linux 7.4 tối ưu hóa bảo mật CPU AMD Zen 6 bằng cách sử dụng tính năng BTB CTX isolation thay cho giải pháp SafeRET tốn kém.
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Source: https://www.phoronix.com/news/AMD-Zen-6-BTB-Linux-7.4-Merged. 8 Sync News only summarizes and links out; content copyright belongs to the authors and original sources.
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