On 12/01/2016 06:30 AM, David Howells wrote: > When the kernel is running in secure boot mode, we lock down the kernel to > prevent userspace from modifying the running kernel image. Whilst this > includes prohibiting access to things like /dev/mem, it must also prevent > access by means of configuring driver modules in such a way as to cause a > device to access or modify the kernel image. > > To this end, annotate module_param* statements that refer to hardware > configuration and indicate for future reference what type of parameter they > specify. The parameter parser in the core sees this information and can > skip such parameters with an error message if the kernel is locked down. > The module initialisation then runs as normal, but just sees whatever the > default values for those parameters is. > > Note that we do still need to do the module initialisation because some > drivers have viable defaults set in case parameters aren't specified and > some drivers support automatic configuration (e.g. PNP or PCI) in addition > to manually coded parameters. > > This patch annotates drivers in drivers/char/ipmi/. > > Suggested-by: One Thousand Gnomes <gno...@lxorguk.ukuu.org.uk> > Signed-off-by: David Howells <dhowe...@redhat.com> > cc: Corey Minyard <miny...@acm.org> > cc: openipmi-developer@lists.sourceforge.net
Reviewed by: Corey Minyard <cminy...@mvista.com> > --- > > drivers/char/ipmi/ipmi_si_intf.c | 14 +++++++------- > 1 file changed, 7 insertions(+), 7 deletions(-) > > diff --git a/drivers/char/ipmi/ipmi_si_intf.c > b/drivers/char/ipmi/ipmi_si_intf.c > index a112c0146012..157e96391eca 100644 > --- a/drivers/char/ipmi/ipmi_si_intf.c > +++ b/drivers/char/ipmi/ipmi_si_intf.c > @@ -1375,39 +1375,39 @@ MODULE_PARM_DESC(type, "Defines the type of each > interface, each" > " interface separated by commas. The types are 'kcs'," > " 'smic', and 'bt'. For example si_type=kcs,bt will set" > " the first interface to kcs and the second to bt"); > -module_param_array(addrs, ulong, &num_addrs, 0); > +module_param_hw_array(addrs, ulong, iomem, &num_addrs, 0); > MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the" > " addresses separated by commas. Only use if an interface" > " is in memory. Otherwise, set it to zero or leave" > " it blank."); > -module_param_array(ports, uint, &num_ports, 0); > +module_param_hw_array(ports, uint, ioport, &num_ports, 0); > MODULE_PARM_DESC(ports, "Sets the port address of each interface, the" > " addresses separated by commas. Only use if an interface" > " is a port. Otherwise, set it to zero or leave" > " it blank."); > -module_param_array(irqs, int, &num_irqs, 0); > +module_param_hw_array(irqs, int, irq, &num_irqs, 0); > MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the" > " addresses separated by commas. Only use if an interface" > " has an interrupt. Otherwise, set it to zero or leave" > " it blank."); > -module_param_array(regspacings, int, &num_regspacings, 0); > +module_param_hw_array(regspacings, int, other, &num_regspacings, 0); > MODULE_PARM_DESC(regspacings, "The number of bytes between the start > address" > " and each successive register used by the interface. For" > " instance, if the start address is 0xca2 and the spacing" > " is 2, then the second address is at 0xca4. Defaults" > " to 1."); > -module_param_array(regsizes, int, &num_regsizes, 0); > +module_param_hw_array(regsizes, int, other, &num_regsizes, 0); > MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in > bytes." > " This should generally be 1, 2, 4, or 8 for an 8-bit," > " 16-bit, 32-bit, or 64-bit register. Use this if you" > " the 8-bit IPMI register has to be read from a larger" > " register."); > -module_param_array(regshifts, int, &num_regshifts, 0); > +module_param_hw_array(regshifts, int, other, &num_regshifts, 0); > MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the." > " IPMI register, in bits. For instance, if the data" > " is read from a 32-bit word and the IPMI data is in" > " bit 8-15, then the shift would be 8"); > -module_param_array(slave_addrs, int, &num_slave_addrs, 0); > +module_param_hw_array(slave_addrs, int, other, &num_slave_addrs, 0); > MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for" > " the controller. Normally this is 0x20, but can be" > " overridden by this parm. This is an array indexed" > ------------------------------------------------------------------------------ _______________________________________________ Openipmi-developer mailing list Openipmi-developer@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/openipmi-developer
