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[Xen-devel] Disk IO using QEMU
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | [Xen-devel] Disk IO using QEMU |
| From: | Alkesh Shah <salkesh@xxxxxxxxxxxxx> |
| Date: | Thu, 19 Apr 2007 00:18:14 -0400 |
| Delivery-date: | Wed, 18 Apr 2007 21:16:56 -0700 |
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Hi,I am trying to understand how Disk I/O actually works in HVM. From what I understand, whenever a disk i/o takes place in a guest OS, a VMEXIT occurs. The hypervisor than executes some handler, which sets up an event pending bit for the event channel communicating with the QEMU-DM in the Domain 0. QEMU-DM than emulates these I/O instructions. Specifically, I wanted to know -1. The functions that are called in this process.... or the files that I need to look at in order to understand the exact flow. 2. Since, QEMU-DM handles both the display as well as the disk I/O, is the same event channel port used for communication between hypervisor and qemu-dm for both display and disk i/o? Thank you for you help. Regards, Alkesh Shah _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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