Re: [PATCH 15/16 v6] PCI: document the SR-IOV sysfs entries
From: Zhao, Yu
Date: Thu Nov 06 2008 - 22:01:53 EST
Greg KH wrote:
On Wed, Nov 05, 2008 at 08:33:18PM -0800, Greg KH wrote:
On Wed, Oct 22, 2008 at 04:45:15PM +0800, Yu Zhao wrote:
Documentation/ABI/testing/sysfs-bus-pci | 33 +++++++++++++++++++++++++++++++
1 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci
index ceddcff..41cce8f 100644
--- a/Documentation/ABI/testing/sysfs-bus-pci
+++ b/Documentation/ABI/testing/sysfs-bus-pci
@@ -9,3 +9,36 @@ Description:
that some devices may have malformatted data. If the
underlying VPD has a writable section then the
corresponding section of this file will be writable.
+
+What: /sys/bus/pci/devices/.../iov/enable
Are you sure this is still the correct location with your change to
struct device?
Nevermind, this is correct.
But the bigger problem is that userspace doesn't know when these
attributes show up. So tools like udev and HAL and others can't look
for them as they never get notified, and they don't even know if they
should be looking for them or not.
Is there any way to tie these attributes to the "main" pci device so
that they get created before the device is announced to the world?
Doing that would solve this issue.
thanks,
greg k-h
Currently PCI subsystem has /sys/.../{vendor,device,...} bundled to the
main PCI device (I suppose this means the entries are created by
'device_add')
And after the PCI device is announced,
/sys/.../{config,resourceX,rom,vpd,iov,...} get created depending on if
these features are supported.
Making dynamic entries tie to the main PCI device would require PCI
subsystem to allocate different 'bus_type' for the devices, right?
Regards,
Yu
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