Filtering IOCTL_ACPI_xxx commands

NTDEV
1

I would like to do some research and to understand ACPI methods like _CRS _SRS _DSM
I would like to write a filter driver that intercept these calls.
Where should I attached this filter driver?
Upper filter or lower filter?
On top of which device it should be attached?

os.

2

These methods are device specific, you cannot filter globally. You need to pick the device in question and add yourself as a lower filter between the FDO and the PDO

d

-----Original Message-----
From: xxxxx@lists.osr.com [mailto:xxxxx@lists.osr.com] On Behalf Of xxxxx@gmail.com
Sent: Wednesday, July 29, 2009 8:00 AM
To: Windows System Software Devs Interest List
Subject: [ntdev] Filtering IOCTL_ACPI_xxx commands

I would like to do some research and to understand ACPI methods like _CRS _SRS _DSM I would like to write a filter driver that intercept these calls.
Where should I attached this filter driver?
Upper filter or lower filter?
On top of which device it should be attached?

os.

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3

I already did this.
I wrote a KMDF filter driver that was register to event EvtIoDeviceControl and I attached it as a LowerFilters to ICH PCI Express root of the express card.
I saw only one call to IOCTL_ACPI_ACQUIRE_GLOBAL_LOCK.
Nothing else.

Any idea?

OS

4

Perhaps you are filtering the wrong device and need to filter a bit more downstream

d

-----Original Message-----
From: xxxxx@lists.osr.com [mailto:xxxxx@lists.osr.com] On Behalf Of xxxxx@gmail.com
Sent: Wednesday, July 29, 2009 2:19 PM
To: Windows System Software Devs Interest List
Subject: RE:[ntdev] Filtering IOCTL_ACPI_xxx commands

I already did this.
I wrote a KMDF filter driver that was register to event EvtIoDeviceControl and I attached it as a LowerFilters to ICH PCI Express root of the express card.
I saw only one call to IOCTL_ACPI_ACQUIRE_GLOBAL_LOCK.
Nothing else.

Any idea?

OS

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5

You’re under the mistaken impression that these methods are driven through
IOCTLs. They’re not.

–
Jake Oshins
Hyper-V I/O Architect (former ACPI guy)
Windows Kernel Group

This post implies no warranties and confers no rights.

wrote in message news:xxxxx@ntdev…
> I already did this.
> I wrote a KMDF filter driver that was register to event EvtIoDeviceControl
> and I attached it as a LowerFilters to ICH PCI Express root of the express
> card.
> I saw only one call to IOCTL_ACPI_ACQUIRE_GLOBAL_LOCK.
> Nothing else.
>
> Any idea?
>
> OS
>