mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 11:09:29 +07:00
baa73d9e47
Some embedded systems have no use for them. This removes about 25KB from the kernel binary size when configured out. Corresponding syscalls are routed to a stub logging the attempt to use those syscalls which should be enough of a clue if they were disabled without proper consideration. They are: timer_create, timer_gettime: timer_getoverrun, timer_settime, timer_delete, clock_adjtime, setitimer, getitimer, alarm. The clock_settime, clock_gettime, clock_getres and clock_nanosleep syscalls are replaced by simple wrappers compatible with CLOCK_REALTIME, CLOCK_MONOTONIC and CLOCK_BOOTTIME only which should cover the vast majority of use cases with very little code. Signed-off-by: Nicolas Pitre <nico@linaro.org> Acked-by: Richard Cochran <richardcochran@gmail.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: John Stultz <john.stultz@linaro.org> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Cc: Paul Bolle <pebolle@tiscali.nl> Cc: linux-kbuild@vger.kernel.org Cc: netdev@vger.kernel.org Cc: Michal Marek <mmarek@suse.com> Cc: Edward Cree <ecree@solarflare.com> Link: http://lkml.kernel.org/r/1478841010-28605-7-git-send-email-nicolas.pitre@linaro.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
94 lines
3.0 KiB
Plaintext
94 lines
3.0 KiB
Plaintext
#
|
|
# PTP clock support configuration
|
|
#
|
|
|
|
menu "PTP clock support"
|
|
|
|
config PTP_1588_CLOCK
|
|
tristate "PTP clock support"
|
|
depends on NET && POSIX_TIMERS
|
|
select PPS
|
|
select NET_PTP_CLASSIFY
|
|
help
|
|
The IEEE 1588 standard defines a method to precisely
|
|
synchronize distributed clocks over Ethernet networks. The
|
|
standard defines a Precision Time Protocol (PTP), which can
|
|
be used to achieve synchronization within a few dozen
|
|
microseconds. In addition, with the help of special hardware
|
|
time stamping units, it can be possible to achieve
|
|
synchronization to within a few hundred nanoseconds.
|
|
|
|
This driver adds support for PTP clocks as character
|
|
devices. If you want to use a PTP clock, then you should
|
|
also enable at least one clock driver as well.
|
|
|
|
To compile this driver as a module, choose M here: the module
|
|
will be called ptp.
|
|
|
|
config PTP_1588_CLOCK_GIANFAR
|
|
tristate "Freescale eTSEC as PTP clock"
|
|
depends on GIANFAR
|
|
depends on PTP_1588_CLOCK
|
|
default y
|
|
help
|
|
This driver adds support for using the eTSEC as a PTP
|
|
clock. This clock is only useful if your PTP programs are
|
|
getting hardware time stamps on the PTP Ethernet packets
|
|
using the SO_TIMESTAMPING API.
|
|
|
|
To compile this driver as a module, choose M here: the module
|
|
will be called gianfar_ptp.
|
|
|
|
config PTP_1588_CLOCK_IXP46X
|
|
tristate "Intel IXP46x as PTP clock"
|
|
depends on IXP4XX_ETH
|
|
depends on PTP_1588_CLOCK
|
|
default y
|
|
help
|
|
This driver adds support for using the IXP46X as a PTP
|
|
clock. This clock is only useful if your PTP programs are
|
|
getting hardware time stamps on the PTP Ethernet packets
|
|
using the SO_TIMESTAMPING API.
|
|
|
|
To compile this driver as a module, choose M here: the module
|
|
will be called ptp_ixp46x.
|
|
|
|
comment "Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks."
|
|
depends on PHYLIB=n || NETWORK_PHY_TIMESTAMPING=n
|
|
|
|
config DP83640_PHY
|
|
tristate "Driver for the National Semiconductor DP83640 PHYTER"
|
|
depends on NETWORK_PHY_TIMESTAMPING
|
|
depends on PHYLIB
|
|
depends on PTP_1588_CLOCK
|
|
---help---
|
|
Supports the DP83640 PHYTER with IEEE 1588 features.
|
|
|
|
This driver adds support for using the DP83640 as a PTP
|
|
clock. This clock is only useful if your PTP programs are
|
|
getting hardware time stamps on the PTP Ethernet packets
|
|
using the SO_TIMESTAMPING API.
|
|
|
|
In order for this to work, your MAC driver must also
|
|
implement the skb_tx_timestamp() function.
|
|
|
|
config PTP_1588_CLOCK_PCH
|
|
tristate "Intel PCH EG20T as PTP clock"
|
|
depends on X86_32 || COMPILE_TEST
|
|
depends on HAS_IOMEM && NET
|
|
imply PTP_1588_CLOCK
|
|
help
|
|
This driver adds support for using the PCH EG20T as a PTP
|
|
clock. The hardware supports time stamping of PTP packets
|
|
when using the end-to-end delay (E2E) mechansim. The peer
|
|
delay mechansim (P2P) is not supported.
|
|
|
|
This clock is only useful if your PTP programs are getting
|
|
hardware time stamps on the PTP Ethernet packets using the
|
|
SO_TIMESTAMPING API.
|
|
|
|
To compile this driver as a module, choose M here: the module
|
|
will be called ptp_pch.
|
|
|
|
endmenu
|