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/
  ...

sound/pci/als4000.c

@@ -102,7 +102,7 @@ MODULE_PARM_DESC(id, "ID string for ALS4000 soundcard.");
 module_param_array(enable, bool, NULL, 0444);
 MODULE_PARM_DESC(enable, "Enable ALS4000 soundcard.");
 #ifdef SUPPORT_JOYSTICK
-module_param_array(joystick_port, int, NULL, 0444);
+module_param_hw_array(joystick_port, int, ioport, NULL, 0444);
 MODULE_PARM_DESC(joystick_port, "Joystick port address for ALS4000 soundcard. (0 = disabled)");
 #endif
 

sound/pci/cmipci.c

@@ -68,14 +68,14 @@ module_param_array(id, charp, NULL, 0444);
 MODULE_PARM_DESC(id, "ID string for C-Media PCI soundcard.");
 module_param_array(enable, bool, NULL, 0444);
 MODULE_PARM_DESC(enable, "Enable C-Media PCI soundcard.");
-module_param_array(mpu_port, long, NULL, 0444);
+module_param_hw_array(mpu_port, long, ioport, NULL, 0444);
 MODULE_PARM_DESC(mpu_port, "MPU-401 port.");
-module_param_array(fm_port, long, NULL, 0444);
+module_param_hw_array(fm_port, long, ioport, NULL, 0444);
 MODULE_PARM_DESC(fm_port, "FM port.");
 module_param_array(soft_ac3, bool, NULL, 0444);
 MODULE_PARM_DESC(soft_ac3, "Software-conversion of raw SPDIF packets (model 033 only).");
 #ifdef SUPPORT_JOYSTICK
-module_param_array(joystick_port, int, NULL, 0444);
+module_param_hw_array(joystick_port, int, ioport, NULL, 0444);
 MODULE_PARM_DESC(joystick_port, "Joystick port address.");
 #endif
 

sound/pci/ens1370.c

@@ -106,7 +106,7 @@ module_param_array(enable, bool, NULL, 0444);
 MODULE_PARM_DESC(enable, "Enable Ensoniq AudioPCI soundcard.");
 #ifdef SUPPORT_JOYSTICK
 #ifdef CHIP1371
-module_param_array(joystick_port, int, NULL, 0444);
+module_param_hw_array(joystick_port, int, ioport, NULL, 0444);
 MODULE_PARM_DESC(joystick_port, "Joystick port address.");
 #else
 module_param_array(joystick, bool, NULL, 0444);

sound/pci/riptide/riptide.c

@@ -137,12 +137,12 @@ MODULE_PARM_DESC(id, "ID string for Riptide soundcard.");
 module_param_array(enable, bool, NULL, 0444);
 MODULE_PARM_DESC(enable, "Enable Riptide soundcard.");
 #ifdef SUPPORT_JOYSTICK
-module_param_array(joystick_port, int, NULL, 0444);
+module_param_hw_array(joystick_port, int, ioport, NULL, 0444);
 MODULE_PARM_DESC(joystick_port, "Joystick port # for Riptide soundcard.");
 #endif
-module_param_array(mpu_port, int, NULL, 0444);
+module_param_hw_array(mpu_port, int, ioport, NULL, 0444);
 MODULE_PARM_DESC(mpu_port, "MPU401 port # for Riptide driver.");
-module_param_array(opl3_port, int, NULL, 0444);
+module_param_hw_array(opl3_port, int, ioport, NULL, 0444);
 MODULE_PARM_DESC(opl3_port, "OPL3 port # for Riptide driver.");
 
 /*

sound/pci/sonicvibes.c

@@ -66,7 +66,7 @@ module_param_array(reverb, bool, NULL, 0444);
 MODULE_PARM_DESC(reverb, "Enable reverb (SRAM is present) for S3 SonicVibes soundcard.");
 module_param_array(mge, bool, NULL, 0444);
 MODULE_PARM_DESC(mge, "MIC Gain Enable for S3 SonicVibes soundcard.");
-module_param(dmaio, uint, 0444);
+module_param_hw(dmaio, uint, ioport, 0444);
 MODULE_PARM_DESC(dmaio, "DDMA i/o base address for S3 SonicVibes soundcard.");
 
 /*

sound/pci/via82xx.c

@@ -92,7 +92,7 @@ module_param(index, int, 0444);
 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
 module_param(id, charp, 0444);
 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
-module_param(mpu_port, long, 0444);
+module_param_hw(mpu_port, long, ioport, 0444);
 MODULE_PARM_DESC(mpu_port, "MPU-401 port. (VT82C686x only)");
 #ifdef SUPPORT_JOYSTICK
 module_param(joystick, bool, 0444);

sound/pci/ymfpci/ymfpci.c

@@ -55,12 +55,12 @@ module_param_array(id, charp, NULL, 0444);
 MODULE_PARM_DESC(id, "ID string for the Yamaha DS-1 PCI soundcard.");
 module_param_array(enable, bool, NULL, 0444);
 MODULE_PARM_DESC(enable, "Enable Yamaha DS-1 soundcard.");
-module_param_array(mpu_port, long, NULL, 0444);
+module_param_hw_array(mpu_port, long, ioport, NULL, 0444);
 MODULE_PARM_DESC(mpu_port, "MPU-401 Port.");
-module_param_array(fm_port, long, NULL, 0444);
+module_param_hw_array(fm_port, long, ioport, NULL, 0444);
 MODULE_PARM_DESC(fm_port, "FM OPL-3 Port.");
 #ifdef SUPPORT_JOYSTICK
-module_param_array(joystick_port, long, NULL, 0444);
+module_param_hw_array(joystick_port, long, ioport, NULL, 0444);
 MODULE_PARM_DESC(joystick_port, "Joystick port address");
 #endif
 module_param_array(rear_switch, bool, NULL, 0444);