“because paging (a major part of the modern protection model) only has a concept of privileged (ring 0,1,2) and unprivileged, the benefit to rings 1 and 2 were diminished greatly”

linux
intel

zyxwv のブックマーク 2020/02/29 22:44

<blockquote class="hatena-bookmark-comment"><a class="comment-info" href="https://b.hatena.ne.jp/entry/4682218752825975234/comment/zyxwv" data-user-id="zyxwv" data-entry-url="https://b.hatena.ne.jp/entry/s/stackoverflow.com/questions/6710040/cpu-privilege-rings-why-rings-1-and-2-arent-used" data-original-href="https://stackoverflow.com/questions/6710040/cpu-privilege-rings-why-rings-1-and-2-arent-used" data-entry-favicon="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fstackoverflow.com%2Fquestions%2F6710040%2Fcpu-privilege-rings-why-rings-1-and-2-arent-used" data-user-icon="/users/zyxwv/profile.png">CPU Privilege Rings: Why rings 1 and 2 aren't used?</a><ul class="comment-tag" style="list-style: none; margin: 0px;"><li style="float: left">[<a href="https://b.hatena.ne.jp/q/linux">linux</a>]</li><li style="float: left">[<a href="https://b.hatena.ne.jp/q/intel">intel</a>]</li></ul><br><p style="clear: left"> “because paging (a major part of the modern protection model) only has a concept of privileged (ring 0,1,2) and unprivileged, the benefit to rings 1 and 2 were diminished greatly”</p><a class="datetime" href="https://b.hatena.ne.jp/zyxwv/20200229#bookmark-4682218752825975234"><span class="datetime-body">2020/02/29 22:44</span></a></blockquote><script src="https://b.st-hatena.com/js/comment-widget.js" charset="utf-8" async></script>

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