hwrng: Kconfig - Fix indentation of HW_RANDOM_CN10K help text

Change the indentation of the help text of the HW_RANDOM_CN10K symbol
from one TAB plus one space to one TAB plus two spaces, as is cust

hwrng: Kconfig - Fix indentation of HW_RANDOM_CN10K help text

Change the indentation of the help text of the HW_RANDOM_CN10K symbol
from one TAB plus one space to one TAB plus two spaces, as is customary.

Signed-off-by: Geert Uytterhoeven <[email protected]>
Reviewed-by: Dragan Simic <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: rockchip - add support for rk3588's standalone TRNG

The RK3588 SoC includes several TRNGs, one part of the Crypto IP block,
and the other one (referred to as "trngv1") as a standalone new IP.

hwrng: rockchip - add support for rk3588's standalone TRNG

The RK3588 SoC includes several TRNGs, one part of the Crypto IP block,
and the other one (referred to as "trngv1") as a standalone new IP.

Add support for this new standalone TRNG to the driver by both
generalising it to support multiple different rockchip RNGs and then
implementing the required functionality for the new hardware.

This work was partly based on the downstream vendor driver by Rockchip's
Lin Jinhan, which is why they are listed as a Co-author.

While the hardware does support notifying the CPU with an IRQ when the
random data is ready, I've discovered while implementing the code to use
this interrupt that this results in significantly slower throughput of
the TRNG even when under heavy CPU load. I assume this is because with
only 32 bytes of data per invocation, the overhead of reinitialising a
completion, enabling the interrupt, sleeping and then triggering the
completion in the IRQ handler is way more expensive than busylooping.

Speaking of busylooping, the poll interval for reading the ISTAT is an
atomic read with a delay of 0. In my testing, I've found that this gives
us the largest throughput, and it appears the random data is ready
pretty much the moment we begin polling, as increasing the poll delay
leads to a drop in throughput significant enough to not just be due to
the poll interval missing the ideal timing by a microsecond or two.

According to downstream, the IP should take 1024 clock cycles to
generate 56 bits of random data, which at 150MHz should work out to
6.8us. I did not test whether the data really does take 256/56*6.8us
to arrive, though changing the readl to a __raw_readl makes no
difference in throughput, and this data does pass the rngtest FIPS
checks, so I'm not entirely sure what's going on but I presume it's got
something to do with the AHB bus speed and the memory barriers that
mainline's readl/writel functions insert.

The only other current SoC that uses this new IP is the Rockchip RV1106,
but that SoC does not have mainline support as of the time of writing,
so we make no effort to declare it as supported for now.

Co-developed-by: Lin Jinhan <[email protected]>
Signed-off-by: Lin Jinhan <[email protected]>
Signed-off-by: Nicolas Frattaroli <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: Kconfig - Move one "tristate" Kconfig description to the usual place

It's pretty usual to have "tristate" descriptions in Kconfig files placed
immediately after the actual configuration optio

hwrng: Kconfig - Move one "tristate" Kconfig description to the usual place

It's pretty usual to have "tristate" descriptions in Kconfig files placed
immediately after the actual configuration options, so correct the position
of one misplaced "tristate" spotted in the hw_random Kconfig file.

No intended functional changes are introduced by this trivial cleanup.

Signed-off-by: Dragan Simic <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: Kconfig - Use tabs as leading whitespace consistently in Kconfig

Replace instances of leading size-eight groups of space characters with
the usual tab characters, as spotted in the hw_random

hwrng: Kconfig - Use tabs as leading whitespace consistently in Kconfig

Replace instances of leading size-eight groups of space characters with
the usual tab characters, as spotted in the hw_random Kconfig file.

No intended functional changes are introduced by this trivial cleanup.

Signed-off-by: Dragan Simic <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: amd - remove reference to removed PPC_MAPLE config

Commit 62f8f307c80e ("powerpc/64: Remove maple platform") removes the
PPC_MAPLE config as a consequence of the platform’s removal.

The conf

hwrng: amd - remove reference to removed PPC_MAPLE config

Commit 62f8f307c80e ("powerpc/64: Remove maple platform") removes the
PPC_MAPLE config as a consequence of the platform’s removal.

The config definition of HW_RANDOM_AMD refers to this removed config option
in its dependencies.

Remove the reference to the removed config option.

Signed-off-by: Lukas Bulwahn <[email protected]>
Acked-by: Michael Ellerman <[email protected]> (powerpc)
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: bcm74110 - Add Broadcom BCM74110 RNG driver

Add a driver for the random number generator present on the Broadcom
BCM74110 SoC.

Signed-off-by: Markus Mayer <[email protected]>
Signed-off-by

hwrng: bcm74110 - Add Broadcom BCM74110 RNG driver

Add a driver for the random number generator present on the Broadcom
BCM74110 SoC.

Signed-off-by: Markus Mayer <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: airoha - add support for Airoha EN7581 TRNG

Add support for Airoha TRNG. The Airoha SoC provide a True RNG module
that can output 4 bytes of raw data at times.

The module makes use of variou

hwrng: airoha - add support for Airoha EN7581 TRNG

Add support for Airoha TRNG. The Airoha SoC provide a True RNG module
that can output 4 bytes of raw data at times.

The module makes use of various noise source to provide True Random
Number Generation.

On probe the module is reset to operate Health Test and verify correct
execution of it.

The module can also provide DRBG function but the execution mode is
mutually exclusive, running as TRNG doesn't permit to also run it as
DRBG.

Signed-off-by: Christian Marangi <[email protected]>
Reviewed-by: Martin Kaiser <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: iproc-r200 - enable on BCMBCA

The Broadcom Broadband Access (BCA) SoC:s include the
iproc r200 hwrng so enable it to be selected for these
platforms.

Signed-off-by: Linus Walleij <linus.wall

hwrng: iproc-r200 - enable on BCMBCA

The Broadcom Broadband Access (BCA) SoC:s include the
iproc r200 hwrng so enable it to be selected for these
platforms.

Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: rockchip - add hwrng driver for Rockchip RK3568 SoC

Rockchip SoCs used to have a random number generator as part of their
crypto device, and support for it has to be added to the correspondin

hwrng: rockchip - add hwrng driver for Rockchip RK3568 SoC

Rockchip SoCs used to have a random number generator as part of their
crypto device, and support for it has to be added to the corresponding
driver. However newer Rockchip SoCs like the RK3568 have an independent
True Random Number Generator device. This patch adds a driver for it,
greatly inspired from the downstream driver.

The TRNG device does not seem to have a signal conditionner and the FIPS
140-2 test returns a lot of failures. They can be reduced by increasing
RK_RNG_SAMPLE_CNT, in a tradeoff between quality and speed. This value
has been adjusted to get ~90% of successes and the quality value has
been set accordingly.

Signed-off-by: Aurelien Jarno <[email protected]>
[[email protected]: code style fixes]
Signed-off-by: Daniel Golle <[email protected]>
Acked-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: cn10k - Enable by default CN10K driver if Thunder SoC is enabled

Before commit addea5858b66 ("hwrng: Kconfig - Do not enable by default
CN10K driver") the Marvell CN10K Random Number Generato

hwrng: cn10k - Enable by default CN10K driver if Thunder SoC is enabled

Before commit addea5858b66 ("hwrng: Kconfig - Do not enable by default
CN10K driver") the Marvell CN10K Random Number Generator was always
enabled when HW_RANDOM was enabled.

This was changed with that commit to prevent having this driver being
always enabled on arm64. To prevent introducing regression with some old
defconfig enable the driver when ARCH_THUNDER is enabled.

Fixes: addea5858b66 ("hwrng: Kconfig - Do not enable by default CN10K driver")
Closes: https://lore.kernel.org/all/SN7PR18MB53144B37B82ADEEC5D35AE0CE3AC2@SN7PR18MB5314.namprd18.prod.outlook.com/
Signed-off-by: Francesco Dolcini <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: Kconfig - Do not enable by default CN10K driver

Do not enable by default the CN10K HW random generator driver.

CN10K Random Number Generator is available only on some specific
Marvell SoCs,

hwrng: Kconfig - Do not enable by default CN10K driver

Do not enable by default the CN10K HW random generator driver.

CN10K Random Number Generator is available only on some specific
Marvell SoCs, however the driver is in practice enabled by default on
all arm64 configs.

Signed-off-by: Francesco Dolcini <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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arch: Remove Itanium (IA-64) architecture

The Itanium architecture is obsolete, and an informal survey [0] reveals
that any residual use of Itanium hardware in production is mostly HP-UX
or OpenVMS

arch: Remove Itanium (IA-64) architecture

The Itanium architecture is obsolete, and an informal survey [0] reveals
that any residual use of Itanium hardware in production is mostly HP-UX
or OpenVMS based. The use of Linux on Itanium appears to be limited to
enthusiasts that occasionally boot a fresh Linux kernel to see whether
things are still working as intended, and perhaps to churn out some
distro packages that are rarely used in practice.

None of the original companies behind Itanium still produce or support
any hardware or software for the architecture, and it is listed as
'Orphaned' in the MAINTAINERS file, as apparently, none of the engineers
that contributed on behalf of those companies (nor anyone else, for that
matter) have been willing to support or maintain the architecture
upstream or even be responsible for applying the odd fix. The Intel
firmware team removed all IA-64 support from the Tianocore/EDK2
reference implementation of EFI in 2018. (Itanium is the original
architecture for which EFI was developed, and the way Linux supports it
deviates significantly from other architectures.) Some distros, such as
Debian and Gentoo, still maintain [unofficial] ia64 ports, but many have
dropped support years ago.

While the argument is being made [1] that there is a 'for the common
good' angle to being able to build and run existing projects such as the
Grid Community Toolkit [2] on Itanium for interoperability testing, the
fact remains that none of those projects are known to be deployed on
Linux/ia64, and very few people actually have access to such a system in
the first place. Even if there were ways imaginable in which Linux/ia64
could be put to good use today, what matters is whether anyone is
actually doing that, and this does not appear to be the case.

There are no emulators widely available, and so boot testing Itanium is
generally infeasible for ordinary contributors. GCC still supports IA-64
but its compile farm [3] no longer has any IA-64 machines. GLIBC would
like to get rid of IA-64 [4] too because it would permit some overdue
code cleanups. In summary, the benefits to the ecosystem of having IA-64
be part of it are mostly theoretical, whereas the maintenance overhead
of keeping it supported is real.

So let's rip off the band aid, and remove the IA-64 arch code entirely.
This follows the timeline proposed by the Debian/ia64 maintainer [5],
which removes support in a controlled manner, leaving IA-64 in a known
good state in the most recent LTS release. Other projects will follow
once the kernel support is removed.

[0] https://lore.kernel.org/all/CAMj1kXFCMh_578jniKpUtx_j8ByHnt=s7S+yQ+vGbKt9ud7+kQ@mail.gmail.com/
[1] https://lore.kernel.org/all/[email protected]/
[2] https://gridcf.org/gct-docs/latest/index.html
[3] https://cfarm.tetaneutral.net/machines/list/
[4] https://lore.kernel.org/all/[email protected]/
[5] https://lore.kernel.org/all/ff58a3e76e5102c94bb5946d99187b358def688a.camel@physik.fu-berlin.de/

Acked-by: Tony Luck <[email protected]>
Signed-off-by: Ard Biesheuvel <[email protected]>

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hwrng: Enable COMPILE_TEST for more drivers

There's quite a few hwrng drivers which are easily enabled for
COMPILE_TEST, so let's enable them.

The dependency on HW_RANDOM is redundant, so drop that

hwrng: Enable COMPILE_TEST for more drivers

There's quite a few hwrng drivers which are easily enabled for
COMPILE_TEST, so let's enable them.

The dependency on HW_RANDOM is redundant, so drop that while we're here.

Signed-off-by: Rob Herring <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: ingenic - enable compile testing

Enable compile testing for the ingenic-trng driver.

Remove the dependency on HW_RANDOM. The ingenic-trng config section is
under "if HW_RANDOM".

Signed-off-

hwrng: ingenic - enable compile testing

Enable compile testing for the ingenic-trng driver.

Remove the dependency on HW_RANDOM. The ingenic-trng config section is
under "if HW_RANDOM".

Signed-off-by: Martin Kaiser <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: pic32 - enable compile-testing

Enable compile testing for the pic32 driver.

Remove the dependency on HW_RANDOM. The pic32 config section is under
"if HW_RANDOM".

Signed-off-by: Martin Kaise

hwrng: pic32 - enable compile-testing

Enable compile testing for the pic32 driver.

Remove the dependency on HW_RANDOM. The pic32 config section is under
"if HW_RANDOM".

Signed-off-by: Martin Kaiser <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: st - support compile-testing

Allow compile-testing the st-rng driver if we're not running on an ST
chipset.

Signed-off-by: Martin Kaiser <[email protected]>
Signed-off-by: Herbert Xu <herbert

hwrng: st - support compile-testing

Allow compile-testing the st-rng driver if we're not running on an ST
chipset.

Signed-off-by: Martin Kaiser <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: histb - Move driver to drivers/char/hw_random/histb-rng.c

Move to drivers/char/hw_random since histb-(t)rng does not provide
cryptography pseudo rng.

histb-rng is pretty like hisi-rng, but a

hwrng: histb - Move driver to drivers/char/hw_random/histb-rng.c

Move to drivers/char/hw_random since histb-(t)rng does not provide
cryptography pseudo rng.

histb-rng is pretty like hisi-rng, but after investigation, we confirm
there is no RNG_PHY_SEED register on histb-rng so a separate driver is
needed.

Still we rename relevant function names to match those in hisi-rng.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: David Yang <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: Kconfig - Add HAS_IOMEM dependencies for exynos/meson/mtk/npcm

Add missing dependencies on HAS_IOMEM as otherwise they will trigger
failed builds with COMPILE_TEST enabled.

Also add dependen

hwrng: Kconfig - Add HAS_IOMEM dependencies for exynos/meson/mtk/npcm

Add missing dependencies on HAS_IOMEM as otherwise they will trigger
failed builds with COMPILE_TEST enabled.

Also add dependencies on OF where appropriate.

Change the default so that these drivers are not enabled just because
COMPILE_TEST is turned on.

Reported-by: kernel test robot <[email protected]>
Link: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Herbert Xu <[email protected]>
Acked-by: Łukasz Stelmach <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: starfive - Enable compile testing

Enable compile testing for jh7110. Also remove the dependency on
HW_RANDOM.

Signed-off-by: Herbert Xu <[email protected]>
Reviewed-by: Conor Dool

hwrng: starfive - Enable compile testing

Enable compile testing for jh7110. Also remove the dependency on
HW_RANDOM.

Signed-off-by: Herbert Xu <[email protected]>
Reviewed-by: Conor Dooley <[email protected]>
Reviewed-by: Jia Jie Ho <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: starfive - Add TRNG driver for StarFive SoC

This adds driver support for the hardware random number generator in
Starfive SoCs and adds StarFive TRNG entry to MAINTAINERS.

Co-developed-by: J

hwrng: starfive - Add TRNG driver for StarFive SoC

This adds driver support for the hardware random number generator in
Starfive SoCs and adds StarFive TRNG entry to MAINTAINERS.

Co-developed-by: Jenny Zhang <[email protected]>
Signed-off-by: Jenny Zhang <[email protected]>
Signed-off-by: Jia Jie Ho <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: bcm2835: bcmbca: Replace ARCH_BCM_63XX with ARCH_BCMBCA

Prepare for the BCM63138 ARCH_BCM_63XX migration to ARCH_BCMBCA. Make
HW_RANDOM_BCM2835 depending on ARCH_BCMBCA.

Signed-off-by: Willi

hwrng: bcm2835: bcmbca: Replace ARCH_BCM_63XX with ARCH_BCMBCA

Prepare for the BCM63138 ARCH_BCM_63XX migration to ARCH_BCMBCA. Make
HW_RANDOM_BCM2835 depending on ARCH_BCMBCA.

Signed-off-by: William Zhang <[email protected]>
Acked-by: Florian Fainelli <[email protected]>
Signed-off-by: Florian Fainelli <[email protected]>

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hwrng: cn10k - Enable compile testing

This patch enables COMPILE_TEST for cn10k.

Signed-off-by: Herbert Xu <[email protected]>

Revert "hwrng: mpfs - Enable COMPILE_TEST"

This reverts commit 6a71277ce91e4766ebe9a5f6725089c80d043ba2.

The underlying option POLARFIRE_SOC_SYS_CTRL already supports
COMPILE_TEST so there is no ne

Revert "hwrng: mpfs - Enable COMPILE_TEST"

This reverts commit 6a71277ce91e4766ebe9a5f6725089c80d043ba2.

The underlying option POLARFIRE_SOC_SYS_CTRL already supports
COMPILE_TEST so there is no need for this. What's more, if
we force this option on without the underlying option it fails
to build.

Reported-by: kernel test robot <[email protected]>
Reported-by: Randy Dunlap <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: mpfs - Enable COMPILE_TEST

The dependency on HW_RANDOM is redundant so this patch removes it.
As this driver seems to cross-compile just fine we could also enable
COMPILE_TEST.

Signed-off-by

hwrng: mpfs - Enable COMPILE_TEST

The dependency on HW_RANDOM is redundant so this patch removes it.
As this driver seems to cross-compile just fine we could also enable
COMPILE_TEST.

Signed-off-by: Herbert Xu <[email protected]>
Reviewed-by: Conor Dooley <[email protected]
Reviewed-by: Conor Dooley <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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hwrng: mpfs - add polarfire soc hwrng support

Add a driver to access the hardware random number generator on the
Polarfire SoC. The hwrng can only be accessed via the system controller,
so use the m

hwrng: mpfs - add polarfire soc hwrng support

Add a driver to access the hardware random number generator on the
Polarfire SoC. The hwrng can only be accessed via the system controller,
so use the mailbox interface the system controller exposes to access the
hwrng.

Signed-off-by: Conor Dooley <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

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