David Howells cc9c617557 Annotate hardware config module parameters in drivers/clocksource/ ... 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/clocksource/. [Note: With regard to cs5535-clockevt.c, Thomas Gleixner asked whether the timer_irq parameter is required for the driver to work on anything other than arbitrary hardware which has it mapped to 0. Jens Rottmann replied that the parameter defaults to 0, which means: 1. autodetect (=keep IRQ BIOS has set up) 2. if that fails use CONFIG_CS5535_MFGPT_DEFAULT_IRQ (see drivers/misc/cs5535-mfgpt.c: cs5535_mfgpt_set_irq()) Jens further noted that there may not be any systems that have CS5535/36 devices that support EFI and secure boot.] Suggested-by: Alan Cox <gnomes@lxorguk.ukuu.org.uk> Signed-off-by: David Howells <dhowells@redhat.com> cc: Daniel Lezcano <daniel.lezcano@linaro.org> cc: Thomas Gleixner <tglx@linutronix.de> cc: Jens Rottmann <Jens.Rottmann@ADLINKtech.com> cc: linux-kernel@vger.kernel.org		2017-04-20 12:02:32 +01:00
..
acpi_pm.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
arc_timer.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-12-25 14:30:04 -08:00
arm_arch_timer.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>	2017-03-02 08:42:27 +01:00
arm_global_timer.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-12-25 14:30:04 -08:00
armv7m_systick.c	clocksource/drivers/armv7m_systick: Add the COMPILE_TEST option	2016-06-28 10:22:05 +02:00
asm9260_timer.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
bcm2835_timer.c	clocksource/drivers/bcm2835_timer: Unmap region obtained by of_iomap	2016-11-22 09:22:59 +01:00
bcm_kona_timer.c	clocksource/drivers/kona: Fix get_counter() error handling	2016-08-17 13:08:31 +02:00
cadence_ttc_timer.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
clkevt-probe.c	clockevents: Add a clkevt-of mechanism like clksrc-of	2017-02-07 20:58:30 +01:00
clksrc-dbx500-prcmu.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
clksrc-probe.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
clksrc_st_lpc.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
clps711x-timer.c	ARM: SoC driver updates for v4.8	2016-08-01 18:36:01 -04:00
cs5535-clockevt.c	Annotate hardware config module parameters in drivers/clocksource/	2017-04-20 12:02:32 +01:00
dummy_timer.c	cpu/hotplug: Cleanup state names	2016-12-25 10:47:44 +01:00
dw_apb_timer.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
dw_apb_timer_of.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
em_sti.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
exynos_mct.c	clocksource/exynos_mct: Clear interrupt when cpu is shut down	2017-01-17 10:08:38 +01:00
fsl_ftm_timer.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
h8300_timer8.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
h8300_timer16.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
h8300_tpu.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
i8253.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
jcore-pit.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-12-25 14:30:04 -08:00
Kconfig	clocksource/drivers/arm_arch_timer: Work around Hisilicon erratum 161010101	2017-02-08 00:14:04 +01:00
Makefile	clocksource/drivers/ostm: Add renesas-ostm timer driver	2017-02-07 20:58:30 +01:00
meson6_timer.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
metag_generic.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-12-25 14:30:04 -08:00
mips-gic-timer.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-12-25 14:30:04 -08:00
mmio.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
moxart_timer.c	clocksource/drivers/moxart: Plug memory and mapping leaks	2016-12-19 11:19:57 +01:00
mps2-timer.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
mtk_timer.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
mxs_timer.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
nomadik-mtu.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
numachip.c	x86/numachip: Fix timer build conflict	2015-09-23 05:39:20 +02:00
pxa_timer.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>	2017-03-02 08:42:27 +01:00
qcom-timer.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-12-25 14:30:04 -08:00
renesas-ostm.c	clocksource/drivers/ostm: Add renesas-ostm timer driver	2017-02-07 20:58:30 +01:00
rockchip_timer.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
samsung_pwm_timer.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
scx200_hrt.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
sh_cmt.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
sh_mtu2.c	clocksource/drivers/sh_mtu2: Fix multiple shutdown call issue	2015-10-28 15:22:56 +01:00
sh_tmu.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
sun4i_timer.c	clocksource/drivers/sun4i: Clear interrupts after stopping timer in probe function	2016-08-26 15:56:01 +02:00
tango_xtal.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
tcb_clksrc.c	Revert "clocksource/drivers/tcb_clksrc: Use 32 bit tcb as sched_clock"	2017-03-11 22:03:34 +01:00
tegra20_timer.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
time-armada-370-xp.c	cpu/hotplug: Cleanup state names	2016-12-25 10:47:44 +01:00
time-efm32.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
time-lpc32xx.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
time-orion.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
time-pistachio.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
timer-atlas7.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-12-25 14:30:04 -08:00
timer-atmel-pit.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
timer-atmel-st.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
timer-digicolor.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>	2017-03-02 08:42:27 +01:00
timer-gemini.c	clocksource/drivers/gemini: Add driver for the Cortina Gemini	2017-02-07 20:58:30 +01:00
timer-imx-gpt.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
timer-integrator-ap.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
timer-keystone.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
timer-nps.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
timer-oxnas-rps.c	clocksource/drivers/oxnas: Add OX820 compatible	2016-09-12 07:28:46 +02:00
timer-prima2.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
timer-sp.h	ARM: 8366/1: move Dual-Timer SP804 driver to drivers/clocksource	2015-06-02 09:58:18 +01:00
timer-sp804.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
timer-stm32.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
timer-sun5i.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
timer-ti-32k.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
timer-u300.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
versatile.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
vf_pit_timer.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00
vt8500_timer.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
zevio-timer.c	clocksources: Switch back to the clksrc table	2016-06-28 10:19:35 +02:00