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Re: [Xen-devel] [PATCH] x86: machine check exception handling
| To: | <xen-devel@xxxxxxxxxxxxxxxxxxx>,"Keir Fraser" <keir@xxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] x86: machine check exception handling |
| From: | "Jan Beulich" <jbeulich@xxxxxxxxxx> |
| Date: | Fri, 22 Jun 2007 07:57:22 +0100 |
| Delivery-date: | Thu, 21 Jun 2007 23:54:41 -0700 |
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| In-reply-to: | <C2A04698.11088%keir@xxxxxxxxxxxxx> |
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> 3. Most contentious, I'm sure: removed VMX changes that would keep >interrupts disabled across NMI/MCE. The reason is simply that SVM does not >bother with this. If there is a requirement that NMI/MCE be called with >particular constraints on EFLAGS, then we should make that clear and fix up >both VMX and SVM in a separate patch. The pain of this is that it would >probably require extra checks on critical vmexit paths. Is it *really* that >bad for #MC to get interrupted? Yes, I think it is bad - the machine is known to be a in bad condition already, and by allowing external interrupts you make the situation even worse. Consequently I think SVM should be fixed to only conditionally enable interrupts, just like VMX does. Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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