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[Xen-devel] RE: [PATCH][VTD][QUIRK] added quirks for Sandybridge errata workaround, WLAN, VT-d fault escalation
- To: Jan Beulich <JBeulich@xxxxxxxxxx>
- From: "Kay, Allen M" <allen.m.kay@xxxxxxxxx>
- Date: Thu, 20 Jan 2011 18:19:41 -0800
- Accept-language: en-US
- Acceptlanguage: en-US
- Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir@xxxxxxx>
- Delivery-date: Thu, 20 Jan 2011 18:20:21 -0800
- List-id: Xen developer discussion <xen-devel.lists.xensource.com>
- Thread-index: Acu4eZwWCX+jMCkjQTO50GGq/3ZN6QAlmZtw
- Thread-topic: [PATCH][VTD][QUIRK] added quirks for Sandybridge errata workaround, WLAN, VT-d fault escalation
> Wouldn't that result in excessive lock holding time?
It would be a problem for older platforms like Weybridge but Sandybridge has
fixed the IGD IOTLB invalidation times. Although I have not done actual
measurement on this yet.
Given this quirks is for a corner case power management issue (not easily
duplicated), I will submit a patch to disable it by default until we can answer
you about the uses of the MMIO registers and implement the locking mechanism
properly.
Allen
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- References:
- [Xen-devel] [PATCH][VTD][QUIRK] added quirks for Sandybridge errata workaround, WLAN, VT-d fault escalation
- [Xen-devel] Re: [PATCH][VTD][QUIRK] added quirks for Sandybridge errata workaround, WLAN, VT-d fault escalation
- [Xen-devel] RE: [PATCH][VTD][QUIRK] added quirks for Sandybridge errata workaround, WLAN, VT-d fault escalation
- [Xen-devel] RE: [PATCH][VTD][QUIRK] added quirks for Sandybridge errata workaround, WLAN, VT-d fault escalation
- [Xen-devel] RE: [PATCH][VTD][QUIRK] added quirks for Sandybridge errata workaround, WLAN, VT-d fault escalation
- [Xen-devel] RE: [PATCH][VTD][QUIRK] added quirks for Sandybridge errata workaround, WLAN, VT-d fault escalation
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