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Bug 594912 - kvm_vm_ioctl_assign_irq() requires CAP_SYS_RAWIO breaking libvirt device assignment
Summary: kvm_vm_ioctl_assign_irq() requires CAP_SYS_RAWIO breaking libvirt device assi...
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel
Version: 6.0
Hardware: All
OS: Linux
Target Milestone: beta
: ---
Assignee: Alex Williamson
QA Contact: Virtualization Bugs
Depends On:
Blocks: 559709 595495
TreeView+ depends on / blocked
Reported: 2010-05-21 22:18 UTC by Alex Williamson
Modified: 2010-11-11 15:43 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2010-11-11 15:43:29 UTC
Target Upstream Version:

Attachments (Terms of Use)
upstream patch backported to rhel6 (1.05 KB, patch)
2010-05-26 19:28 UTC, Alex Williamson
no flags Details | Diff

Description Alex Williamson 2010-05-21 22:18:22 UTC
Description of problem:

kvm_vm_ioctl_assign_irq() checks for CAP_SYS_RAWIO, which is not present for qemu processes launched via libvirt.  This check really isn't necessary since it can only operate on devices previously assigned via the assign_device ioctl.  Remove the check.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. assign passthrough device via libvirt
2. fail (note this isn't the only problem blocking this path)
Actual results:
assign_irq ioctl fails

Expected results:

Additional info:

Comment 3 Alex Williamson 2010-05-26 19:28:59 UTC
Created attachment 416999 [details]
upstream patch backported to rhel6

Here's the patch posted to rhkernel-list.  This was accepted upstream.  assign_irq only works on devices already registered through assign_device, so it doesn't make much sense to enforce RAWIO here.

Comment 5 Aristeu Rozanski 2010-05-28 20:38:23 UTC
Patch(es) available on kernel-2.6.32-31.el6

Comment 8 lihuang 2010-08-18 14:09:57 UTC
Tested on  kernel-2.6.32-63.el6

Comment 9 releng-rhel@redhat.com 2010-11-11 15:43:29 UTC
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.

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