Armv8.5 adds an optional random number generator. This is implemented
as two special registers one to read a random number, the other to
re-seed the entropy pool before reading a random number. Both registers
will set the condition flags to tell the caller they can't produce a
random number in a reasonable amount of time.
Without a signal to reseed the entropy pool use the latter register
to provide random numbers to the kernel pool. If at a later time we
had a way to tell the provider if it needs to reseed or not we could
use the former.
On an Amazon AWS Graviton3 VM this never failed, however this may not
be the case on low end CPUs so retry reading the random number 10 times
before returning an error.
Reviewed by: imp, delphij (csprng)
Sponsored by: The FreeBSD Foundation
Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D35411
(cherry picked from commit 9eecef052155646fbc5f8f533b952b372572d06a)
Include the new unified HID stack by default in generic.
This will allow us to migrate to the multi-stack hkbd and hms instead of
relying on the older ukbd and ums which only work with USB.
To test those drivers just add hw.usb.usbhid.enable=1 in loader.conf
Differential Revision: https://reviews.freebsd.org/D45658
Reviewed by: emaste, imp, wulf (all older version)
Sponsored by: Beckhoff Automation GmbH & Co. KG
(cherry picked from commit 13d00a43cba4c35fcc9e0ab567baf530126a6348)
conf: hidmap is always needed for hms
So bring it in when hms is in the kernel config
Fixes: 13d00a43cba4 ("conf: Add usbhid and hidbus to GENERIC* kernel configs")
Sponsored by: Beckhoff Automation GmbH & Co. KG
(cherry picked from commit 5ed91e788f0b97c9e6c544671ffef71fad7cad27)
conf: powerpc: Add evdev to some kernel configs
Fixes: 13d00a43cba4 ("conf: Add usbhid and hidbus to GENERIC* kernel configs")
Sponsored by: Beckhoff Automation GmbH & Co. KG
(cherry picked from commit 43a62df0b464e60895084c7f9d9eddf70906fda3)
Allows the development, testing and deployment of netmap(4)-based code
on arm64 without having to recompile the kernel. netmap(4) is already
in the amd64 and powerpc64 default configs, so it does not seem
unreasonable to also provide it on arm64 by default.
Note that netmap(4) is useful even on systems without NIC that fully
support it.
Reviewed by: vmaffione
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D43702
(cherry picked from commit df64d7c8c82d59958cb546b23ba240ab97dc5033)
This allows us to support this hardware and, in the future, use clocks
so they are enabled past the initial kernel boot process.
Reviewed by: ray
Differential Revision: https://reviews.freebsd.org/D30103
Most options in kernel config files use "options<space><tab>OPTION".
This allows the option to be commented out without shifting columns.
A few options had two tabs, and some had spaces. Make them consistent.
The scmi driver in its current form requires the arm_doorbell
driver to communicate with the firmware.
The arm_doorbell is only found in ARM Juno reference board (and
apparently on Morello too).
If we want to use scmi on other platform (like some rockchip or imx
soc), the driver needs to be updated to support svc/shmem communication
with the firmware.
For now since it can be only used with arm_doorbell move the device to
std.arm otherwise kernel configs like ALLWINNER or ROCKCHIP fails to build.
Reviewed by: br, imp
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D37953
The SCMI specification describes a set of standard interfaces for power,
performance and system management.
SCMI is extensible and provides interfaces to access functions which are
often implemented in firmwares in the System Control Processor (SCP).
This implements Shared Memory-based transfer, which is one of the ways on
how messages are exchanged between agents and the platform.
This includes a driver for ARM Message Handling Unit (MHU) Doorbell, which
is a mechanism that the caller can use to alert the callee of the presence
of a message.
The support implements clock management interface. For instance this allows
us to control HDMI pixel clock on ARM Morello Board.
Tested on ARM Morello Board.
Obtained from: CheriBSD
Differential Revision: https://reviews.freebsd.org/D37316
Reviewed by: manu
Sponsored by: UKRI
This is the last part for ARM64 Hyper-V enablement. This includes
commone files and make file changes to enable the ARM64 FreeBSD
guest on Hyper-V. With this patch, it should be able to build
the ARM64 image and install it on Hyper-V.
Reviewed by: emaste, andrew, whu
Tested by: Souradeep Chakrabarti <schakrabarti@microsoft.com>
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D36744
There is multiple reason for this :
- This makes it easier to see which driver is needed for each SoC
- This makes it easier to create a custom config for one SoC
- This really reduce boot time (which some people might want)
Some explaination about the files :
- std.arm64 contains all standard kernel option
- std.dev contains all the standard kernel devices
- std.<soc> contains all drivers needed to boot on this SoC family
- <SOC> includes std.arm64, std.dev and std.<soc>
- GENERIC includes std.arm64, std.dev and all std.<soc>
Sponsored by: Diablotin Systems
MFC After: 2 months
Reviewed by: mmel, cognet, imp
Differential Revision: https://reviews.freebsd.org/D30474
