On Thu, Feb 22, 2018 at 06:20:38PM +0200, Or Idgar wrote: > From: Or Idgar <orid...@gmail.com> > > This patch is a driver which expose the Virtual Machine Generation ID > via sysfs. The ID is a UUID value used to differentiate between virtual > machines. > > The VM-Generation ID is a feature defined by Microsoft (paper: > http://go.microsoft.com/fwlink/?LinkId=260709) and supported by multiple > hypervisor vendors. > > Signed-off-by: Or Idgar <orid...@gmail.com> > --- > Documentation/ABI/testing/sysfs-hypervisor | 13 +++ > drivers/misc/Kconfig | 6 ++ > drivers/misc/Makefile | 1 + > drivers/misc/vmgenid.c | 141 > +++++++++++++++++++++++++++++ > 4 files changed, 161 insertions(+) > create mode 100644 Documentation/ABI/testing/sysfs-hypervisor > create mode 100644 drivers/misc/vmgenid.c > > diff --git a/Documentation/ABI/testing/sysfs-hypervisor > b/Documentation/ABI/testing/sysfs-hypervisor > new file mode 100644 > index 000000000000..2f9a7b8eab70 > --- /dev/null > +++ b/Documentation/ABI/testing/sysfs-hypervisor > @@ -0,0 +1,13 @@ > +What: /sys/hypervisor/vm_gen_counter
Shouldn't this go under the specific hypervisor you are running on? Why in the "root" of /sys/hypervisor? > +Date: February 2018 > +Contact: Or Idgar <id...@virtualoco.com> > + Gal Hammer <gham...@redhat.com> > +Description: Expose the virtual machine generation ID. The directory > + contains two files: "generation_id" and "raw". Both files > + represent the same information. > + > + "generation_id" file is a UUID string > + representation. > + > + "raw" file is a 128-bit integer > + representation (binary). > diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig > index 03605f8fc0dc..5a74802bdfb4 100644 > --- a/drivers/misc/Kconfig > +++ b/drivers/misc/Kconfig > @@ -500,6 +500,12 @@ config MISC_RTSX > tristate > default MISC_RTSX_PCI || MISC_RTSX_USB > > +config VMGENID > + tristate "Virtual Machine Generation ID driver" > + help > + This is a Virtual Machine Generation ID driver which provides > + a virtual machine unique identifier. > + > source "drivers/misc/c2port/Kconfig" > source "drivers/misc/eeprom/Kconfig" > source "drivers/misc/cb710/Kconfig" > diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile > index c3c8624f4d95..067aa666bb6a 100644 > --- a/drivers/misc/Makefile > +++ b/drivers/misc/Makefile > @@ -57,6 +57,7 @@ obj-$(CONFIG_ASPEED_LPC_SNOOP) += aspeed-lpc-snoop.o > obj-$(CONFIG_PCI_ENDPOINT_TEST) += pci_endpoint_test.o > obj-$(CONFIG_OCXL) += ocxl/ > obj-$(CONFIG_MISC_RTSX) += cardreader/ > +obj-$(CONFIG_VMGENID) += vmgenid.o > > lkdtm-$(CONFIG_LKDTM) += lkdtm_core.o > lkdtm-$(CONFIG_LKDTM) += lkdtm_bugs.o > diff --git a/drivers/misc/vmgenid.c b/drivers/misc/vmgenid.c > new file mode 100644 > index 000000000000..9d7f09f9e7bd > --- /dev/null > +++ b/drivers/misc/vmgenid.c > @@ -0,0 +1,141 @@ > +/* > + * Virtual Machine Generation ID driver > + * > + * Copyright (C) 2018 Red Hat, Inc. All rights reserved. > + * Authors: > + * Or Idgar <orid...@gmail.com> > + * Gal Hammer <gham...@redhat.com> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. No SPDX line? Please see the documentation for how to properly add this as the first line of any new file. I want some hypervisor people to weigh in on this before I can take it... thanks, greg k-h
