[PATCH 0/4] Xilinx TRNG fix and simplification

[Eric Biggers]

On Thu, Jun 11, 2026 at 04:49:27PM +0800, Herbert Xu wrote:
> On Sun, May 31, 2026 at 12:17:34PM -0700, Eric Biggers wrote:
> > This series fixes and greatly simplifies the Xilinx TRNG driver by:
> > 
> > - Removing the gratuitous crypto_rng interface, leaving just hwrng which
> >   is the one that actually matters.
> > 
> > - Replacing the really complicated AES based entropy extraction
> >   algorithm with a much simpler one.
> > 
> > Note that this mirrors similar changes in other drivers.
> > 
> > Eric Biggers (4):
> >   crypto: xilinx-trng - Remove crypto_rng interface
> >   crypto: xilinx-trng - Fix return value of xtrng_hwrng_trng_read()
> >   crypto: xilinx-trng - Replace crypto_drbg_ctr_df() with HMAC-SHA512
> >   hwrng: xilinx - Move xilinx-rng into drivers/char/hw_random/
> > 
> >  MAINTAINERS                                   |   2 +-
> >  arch/arm64/configs/defconfig                  |   2 +-
> >  crypto/Kconfig                                |   5 -
> >  crypto/Makefile                               |   2 -
> >  crypto/df_sp80090a.c                          | 222 ------------------
> >  drivers/char/hw_random/Kconfig                |  11 +
> >  drivers/char/hw_random/Makefile               |   1 +
> >  .../xilinx => char/hw_random}/xilinx-trng.c   | 134 ++---------
> >  drivers/crypto/Kconfig                        |  13 -
> >  drivers/crypto/xilinx/Makefile                |   1 -
> >  include/crypto/df_sp80090a.h                  |  53 -----
> >  11 files changed, 37 insertions(+), 409 deletions(-)
> >  delete mode 100644 crypto/df_sp80090a.c
> >  rename drivers/{crypto/xilinx => char/hw_random}/xilinx-trng.c (75%)
> >  delete mode 100644 include/crypto/df_sp80090a.h
> > 
> > 
> > base-commit: 5624ea54f3ba5c83d2e5503411a31a8be0278c1e
> > prerequisite-patch-id: 07e982b663ac3f8312ca524f6b91b5b38661df5e
> > prerequisite-patch-id: 72064361a8f36e015ab0b7e1fa4d364b40d90506
> > prerequisite-patch-id: 8978b8e0db7f47935e5f6f0aff14a97f55d3073c
> > prerequisite-patch-id: 6aa0e3e93a008279d71e535a3d0cf48643f55e19
> > -- 
> > 2.54.0
> 
> All applied.  Thanks.

Can you re-add the following to "hwrng: xilinx - Move xilinx-rng into
drivers/char/hw_random/"?  It seems you applied this before the qcom-rng
series, then dropped the drivers/char/hw_random/Makefile change rather
than resolve it.

diff --git a/drivers/char/hw_random/Makefile b/drivers/char/hw_random/Makefile
index 3e655d6e116b..95b5adb49560 100644
--- a/drivers/char/hw_random/Makefile
+++ b/drivers/char/hw_random/Makefile
@@ -51,5 +51,6 @@ obj-$(CONFIG_HW_RANDOM_XIPHERA) += xiphera-trng.o
 obj-$(CONFIG_HW_RANDOM_ARM_SMCCC_TRNG) += arm_smccc_trng.o
 obj-$(CONFIG_HW_RANDOM_CN10K) += cn10k-rng.o
 obj-$(CONFIG_HW_RANDOM_POLARFIRE_SOC) += mpfs-rng.o
 obj-$(CONFIG_HW_RANDOM_ROCKCHIP) += rockchip-rng.o
 obj-$(CONFIG_HW_RANDOM_JH7110) += jh7110-trng.o
+obj-$(CONFIG_HW_RANDOM_XILINX) += xilinx-trng.o