Messages in this thread | | | Date | Sun, 12 Dec 2004 09:26:29 -0700 (MST) | From | Zwane Mwaikambo <> | Subject | Re: RCU question |
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On Sun, 12 Dec 2004, Manfred Spraul wrote:
> Zwane Mwaikambo wrote: > > > "Intel processors don't suppress SMI or NMI after an STI instruction. Since > > the INTR suppresion is not preserved across an SMI or NMI handler, this may > > result in an INTR being serviced after the STI, which constitutes a > > violation of the INTR suppresion. > > > Interesting find. > It means that our NMI irq return path should check if it points to a hlt > instruction and if yes, then increase the saved EIP by one before doing the > iretd, right?
Yeah that should do it, but then we also have to worry about SMIs, perhaps we could add similar logic to interrupt return path instead? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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