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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-23 04:34:11 +08:00
linux-next/drivers/media/pci
Linus Torvalds 291b38a756 Annotation of module parameters that specify device settings
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Merge tag 'hwparam-20170420' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull hw lockdown support from David Howells:
 "Annotation of module parameters that configure hardware resources
  including ioports, iomem addresses, irq lines and dma channels.

  This allows a future patch to prohibit the use of such module
  parameters to prevent that hardware from being abused to gain access
  to the running kernel image as part of locking the kernel down under
  UEFI secure boot conditions.

  Annotations are made by changing:

        module_param(n, t, p)
        module_param_named(n, v, t, p)
        module_param_array(n, t, m, p)

  to:

        module_param_hw(n, t, hwtype, p)
        module_param_hw_named(n, v, t, hwtype, p)
        module_param_hw_array(n, t, hwtype, m, p)

  where the module parameter refers to a hardware setting

  hwtype specifies the type of the resource being configured. This can
  be one of:

        ioport          Module parameter configures an I/O port
        iomem           Module parameter configures an I/O mem address
        ioport_or_iomem Module parameter could be either (runtime set)
        irq             Module parameter configures an I/O port
        dma             Module parameter configures a DMA channel
        dma_addr        Module parameter configures a DMA buffer address
        other           Module parameter configures some other value

  Note that the hwtype is compile checked, but not currently stored (the
  lockdown code probably won't require it). It is, however, there for
  future use.

  A bonus is that the hwtype can also be used for grepping.

  The intention is for the kernel to ignore or reject attempts to set
  annotated module parameters if lockdown is enabled. This applies to
  options passed on the boot command line, passed to insmod/modprobe or
  direct twiddling in /sys/module/ parameter files.

  The module initialisation then needs to handle the parameter not being
  set, by (1) giving an error, (2) probing for a value or (3) using a
  reasonable default.

  What I can't do is just reject a module out of hand because it may
  take a hardware setting in the module parameters. Some important
  modules, some ipmi stuff for instance, both probe for hardware and
  allow hardware to be manually specified; if the driver is aborts with
  any error, you don't get any ipmi hardware.

  Further, trying to do this entirely in the module initialisation code
  doesn't protect against sysfs twiddling.

  [!] Note that in and of itself, this series of patches should have no
      effect on the the size of the kernel or code execution - that is
      left to a patch in the next series to effect. It does mark
      annotated kernel parameters with a KERNEL_PARAM_FL_HWPARAM flag in
      an already existing field"

* tag 'hwparam-20170420' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs: (38 commits)
  Annotate hardware config module parameters in sound/pci/
  Annotate hardware config module parameters in sound/oss/
  Annotate hardware config module parameters in sound/isa/
  Annotate hardware config module parameters in sound/drivers/
  Annotate hardware config module parameters in fs/pstore/
  Annotate hardware config module parameters in drivers/watchdog/
  Annotate hardware config module parameters in drivers/video/
  Annotate hardware config module parameters in drivers/tty/
  Annotate hardware config module parameters in drivers/staging/vme/
  Annotate hardware config module parameters in drivers/staging/speakup/
  Annotate hardware config module parameters in drivers/staging/media/
  Annotate hardware config module parameters in drivers/scsi/
  Annotate hardware config module parameters in drivers/pcmcia/
  Annotate hardware config module parameters in drivers/pci/hotplug/
  Annotate hardware config module parameters in drivers/parport/
  Annotate hardware config module parameters in drivers/net/wireless/
  Annotate hardware config module parameters in drivers/net/wan/
  Annotate hardware config module parameters in drivers/net/irda/
  Annotate hardware config module parameters in drivers/net/hamradio/
  Annotate hardware config module parameters in drivers/net/ethernet/
  ...
2017-05-10 19:13:03 -07:00
..
b2c2 [media] b2c2: fix spelling mistake: "Contunuity" -> "Continuity" 2017-01-30 15:45:34 -02:00
bt8xx [media] bt8xx: use setup_timer 2017-04-10 14:46:46 -03:00
cobalt [media] cobalt: fix spelling mistake: "Celcius" -> "Celsius" 2017-01-30 15:45:06 -02:00
cx18 [media] cx18: use setup_timer 2017-04-10 14:48:01 -03:00
cx88 [media] cx88: constify mb86a16_config structure 2017-04-17 12:52:41 -03:00
cx23885 [media] tveeprom: get rid of unused arg on tveeprom_hauppauge_analog() 2017-03-03 07:35:02 -03:00
cx25821 [media] media: Drop FSF's postal address from the source code files 2017-01-27 11:38:09 -02:00
ddbridge [media] media: Drop FSF's postal address from the source code files 2017-01-27 11:38:09 -02:00
dm1105 [media] media: pci: constify stv0299_config structures 2017-04-17 13:04:18 -03:00
dt3155 [media] vb2: replace void *alloc_ctxs by struct device *alloc_devs 2016-07-08 14:45:07 -03:00
ivtv [media] ivtv: use setup_timer 2017-04-10 14:50:15 -03:00
mantis [media] pci: mantis: constify mb86a16_config structure 2017-04-17 12:53:03 -03:00
meye [media] media: pci: meye: set error code on failures 2017-02-03 08:01:30 -02:00
netup_unidvb [media] netup_unidvb: use setup_timer 2017-04-10 14:50:50 -03:00
ngene [media] ngene: drop ngene_link_reset() 2017-02-03 11:35:59 -02:00
pluto2 [media] media: Drop FSF's postal address from the source code files 2017-01-27 11:38:09 -02:00
pt1 sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
pt3 sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
saa7134 [media] saa7134: constify nxt200x_config structures 2017-04-17 12:18:52 -03:00
saa7146 [media] include/media: move driver interface headers to a separate dir 2015-11-17 06:57:29 -02:00
saa7164 [media] media: pci: saa7164: remove dead code 2017-04-17 13:07:50 -03:00
smipcie [media] rc-main: assign driver type during allocation 2017-01-30 13:59:57 -02:00
solo6x10 [media] solo6x10: release vb2 buffers in solo_stop_streaming() 2017-03-22 11:57:31 -03:00
sta2x11 [media] media: pci: constify vb2_ops structure 2017-02-03 14:23:39 -02:00
ttpci [media] media: pci: constify stv0299_config structures 2017-04-17 13:04:18 -03:00
tw68 [media] tw68: don't break long lines 2016-10-21 09:29:44 -02:00
tw686x [media] tw686x: silent -Wformat-security warning 2017-02-03 07:20:19 -02:00
tw5864 [media] tw5864: use dev_warn instead of WARN to shut up warning 2017-03-22 10:12:54 -03:00
zoran Annotate hardware config module parameters in drivers/media/ 2017-04-20 12:02:32 +01:00
Kconfig [media] pci: Add tw5864 driver 2016-08-24 11:17:22 -03:00
Makefile [media] pci: Add tw5864 driver 2016-08-24 11:17:22 -03:00