Messages in this thread | | | From | "Li, Xin3" <> | Subject | RE: [PATCH v5 25/34] x86/fred: disallow the swapgs instruction when FRED is enabled | Date | Mon, 20 Mar 2023 17:58:14 +0000 |
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> > The FRED architecture establishes the full supervisor/user through: > > 1) FRED event delivery swaps the value of the GS base address and > > that of the IA32_KERNEL_GS_BASE MSR. > > 2) ERETU swaps the value of the GS base address and that of the > > IA32_KERNEL_GS_BASE MSR. > > Thus, the swapgs instruction is disallowed when FRED is enabled, > > otherwise it cauess #UD. > ^^^ --- new word :-)
My stupid fingers...
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