 Home |
Products |
Support |
Community |
News |
xen-devel
[Xen-devel] [VTD] [PATCH] Ignore USB RMRR for HVM guest
| To: | <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [VTD] [PATCH] Ignore USB RMRR for HVM guest |
| From: | "Han, Weidong" <weidong.han@xxxxxxxxx> |
| Date: | Wed, 19 Mar 2008 10:46:28 +0800 |
| Cc: | "Kay, Allen M" <allen.m.kay@xxxxxxxxx> |
| Delivery-date: | Tue, 18 Mar 2008 19:55:59 -0700 |
| Envelope-to: | www-data@xxxxxxxxxxxxxxxxxx |
| List-help: | <mailto:xen-devel-request@lists.xensource.com?subject=help> |
| List-id: | Xen developer discussion <xen-devel.lists.xensource.com> |
| List-post: | <mailto:xen-devel@lists.xensource.com> |
| List-subscribe: | <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe> |
| List-unsubscribe: | <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe> |
| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
| Thread-index: | AciJa23CI5sdTtz3SJeDbdL+c4ooRA== |
| Thread-topic: | [Xen-devel] [VTD] [PATCH] Ignore USB RMRR for HVM guest |
USB controller RMRR (0xed000 - 0xeffff) conflicts with HVM guest bios region. Setting identity mapping for it will cover the guest bios region in p2m table. This causes system crash. As VT-d spec says, USB controller RMRR is used in case of DMA performed by a USB controller under BIOS SMM control for legacy keyboard emulation. Whereas, current guest BIOS doesn't support emulating stardand Keyboard/mouse, and it also doesn't support SMM mode. Actually it is no chance to use USB controller RMRR now. This patch ignores the USB controller RMRR for HVM guest. Signed-off-by: Weidong Han <weidong.han@xxxxxxxxx>
_______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | RE: [Xen-devel] Why call iommu_unmap_page() in set_p2m_entry()?, Han, Weidong |
|---|---|
| Next by Date: | [Xen-devel] how does variable num define for errno in libxc, tgh |
| Previous by Thread: | [Xen-devel] Xen network performance analysis and benchmarks / windows pv drivers, Pasi Kärkkäinen |
| Next by Thread: | [Xen-devel] how does variable num define for errno in libxc, tgh |
| Indexes: | [Date] [Thread] [Top] [All Lists] |
