On Thu, Feb 25, 2010 at 05:30:29PM +0000, Haiyang Zhang wrote: > > From: Greg KH [mailto:greg@xxxxxxxxx] > > So, is there a way to "know" ahead of time if we are in a HV guest > > environment? > > Here is some info from dmesg, which shows "VRTUAL MICROSFT". > ACPI: RSDT (v001 VRTUAL MICROSFT 0x03000919 MSFT 0x00000097) @ 0x000000001fff0000 > ACPI: FADT (v002 VRTUAL MICROSFT 0x03000919 MSFT 0x00000097) @ 0x000000001fff0200 > ACPI: WAET (v001 VRTUAL MICROSFT 0x03000919 MSFT 0x00000097) @ 0x000000001fff0b00 > ACPI: SLIC (v001 VRTUAL MICROSFT 0x03000919 MSFT 0x00000097) @ 0x000000001fff0b40 > ACPI: OEM0 (v001 VRTUAL MICROSFT 0x03000919 MSFT 0x00000097) @ 0x000000001fff0d40 > ACPI: SRAT (v002 VRTUAL MICROSFT 0x03000919 MSFT 0x00000097) @ 0x000000001fff0600 > ACPI: MADT (v001 VRTUAL MICROSFT 0x03000919 MSFT 0x00000097) @ 0x000000001fff0300 > ACPI: OEMB (v001 VRTUAL MICROSFT 0x03000919 MSFT 0x00000097) @ 0x000000001ffff240 > ACPI: DSDT (v001 MSFTVM MSFTVM02 0x00000002 INTL 0x02002026) @ 0x0000000000000000 That's a good start, so which device can we key off of here? What does the following command output in a HV virtual system: grep . /sys/bus/acpi/devices/*/modalias That might give us something that we can use. How about DMI data? Does the Host export any info there? Is there anything in the /sys/class/dmi/id/ directory? If so, can you send the output of: cat /sys/class/dmi/id/modalias And you are sure no PCI devices are present to key off of that are never going to show up in a "physical" machine? What do you recommend doing here? thanks, greg k-h _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
