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The chacha-p10-crypto module provides optimised chacha routines for Power10. It also selects CRYPTO_ARCH_HAVE_LIB_CHACHA which says it provides chacha_crypt_arch() to generic code. Notably the module needs to provide chacha_crypt_arch() regardless of whether it is loaded on Power10 or an older CPU. The implementation of chacha_crypt_arch() already has a fallback to chacha_crypt_generic(), however the module as a whole fails to load on pre-Power10, because of the use of module_cpu_feature_match(). This breaks for example loading wireguard: jostaberry-1:~ # modprobe -v wireguard insmod /lib/modules/6.8.0-lp155.8.g7e0e887-default/kernel/arch/powerpc/crypto/chacha-p10-crypto.ko.zst modprobe: ERROR: could not insert 'wireguard': No such device Fix it by removing module_cpu_feature_match(), and instead check the CPU feature manually. If the CPU feature is not found, the module still loads successfully, but doesn't register the Power10 specific algorithms. That allows chacha_crypt_generic() to remain available for use, fixing the problem. [root@fedora ~]# modprobe -v wireguard insmod /lib/modules/6.8.0-00001-g786a790c4d79/kernel/net/ipv4/udp_tunnel.ko insmod /lib/modules/6.8.0-00001-g786a790c4d79/kernel/net/ipv6/ip6_udp_tunnel.ko insmod /lib/modules/6.8.0-00001-g786a790c4d79/kernel/lib/crypto/libchacha.ko insmod /lib/modules/6.8.0-00001-g786a790c4d79/kernel/arch/powerpc/crypto/chacha-p10-crypto.ko insmod /lib/modules/6.8.0-00001-g786a790c4d79/kernel/lib/crypto/libchacha20poly1305.ko insmod /lib/modules/6.8.0-00001-g786a790c4d79/kernel/drivers/net/wireguard/wireguard.ko [ 18.910452][ T721] wireguard: allowedips self-tests: pass [ 18.914999][ T721] wireguard: nonce counter self-tests: pass [ 19.029066][ T721] wireguard: ratelimiter self-tests: pass [ 19.029257][ T721] wireguard: WireGuard 1.0.0 loaded. See www.wireguard.com for information. [ 19.029361][ T721] wireguard: Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. Reported-by: Michal Suchánek <msuchanek@suse.de> Closes: https://lore.kernel.org/all/20240315122005.GG20665@kitsune.suse.cz/ Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240328130200.3041687-1-mpe@ellerman.id.au |
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| .. | ||
| .gitignore | ||
| aes_cbc.c | ||
| aes_ctr.c | ||
| aes_xts.c | ||
| aes-gcm-p10-glue.c | ||
| aes-gcm-p10.S | ||
| aes-spe-core.S | ||
| aes-spe-glue.c | ||
| aes-spe-keys.S | ||
| aes-spe-modes.S | ||
| aes-spe-regs.h | ||
| aes-tab-4k.S | ||
| aes.c | ||
| aesp8-ppc.h | ||
| aesp8-ppc.pl | ||
| aesp10-ppc.pl | ||
| chacha-p10-glue.c | ||
| chacha-p10le-8x.S | ||
| crc32-vpmsum_core.S | ||
| crc32c-vpmsum_asm.S | ||
| crc32c-vpmsum_glue.c | ||
| crc-vpmsum_test.c | ||
| crct10dif-vpmsum_asm.S | ||
| crct10dif-vpmsum_glue.c | ||
| ghash.c | ||
| ghashp8-ppc.pl | ||
| ghashp10-ppc.pl | ||
| Kconfig | ||
| Makefile | ||
| md5-asm.S | ||
| md5-glue.c | ||
| poly1305-p10-glue.c | ||
| poly1305-p10le_64.S | ||
| ppc-xlate.pl | ||
| sha1-powerpc-asm.S | ||
| sha1-spe-asm.S | ||
| sha1-spe-glue.c | ||
| sha1.c | ||
| sha256-spe-asm.S | ||
| sha256-spe-glue.c | ||
| vmx.c | ||