From patchwork Wed Jul 6 10:54:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Jason A. Donenfeld" X-Patchwork-Id: 12907978 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 272BDC433EF for ; Wed, 6 Jul 2022 10:55:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=zCp3Toz5bPDrBHFQP8evTCY9X4Y1hKxPT++sMKptgc0=; b=McY+UlE99Mz0WV 8B/vm3/DFlSDpc9TAnAdp1lYxl5QvNjSkoJ2pBGtjaZf+j18LAGgO1zc93YUJw4iqOKG8uYkhTib2 GCI9KOSCCsOTg8SSr7W3sC3wORUlOe0g1RtGOV0LgVKGrFQ+fy0jngmiaciWvOQxm2vhzAjon1oWE Vn2c9V7JeC3mxtsYXF+txodf8bb1oxyJ270kjbkTqGNWd8CM2YOhmCjNN9tu3CnAGQi3kD0EQcJmD sk4Q7TSO72yu03DHpJaZVfVvsenNdJhrRJJh3Dc9Rq5rOlc2faM8hpqCwl8WYjcpbIyGsyYfMZ+z8 hr0peVff68f1q++qpYBQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o92fx-008vTW-Jm; Wed, 06 Jul 2022 10:54:33 +0000 Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o92ft-008vPV-K8 for linux-arm-kernel@lists.infradead.org; Wed, 06 Jul 2022 10:54:32 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id B672AB81BE6; Wed, 6 Jul 2022 10:54:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C8BF6C3411C; Wed, 6 Jul 2022 10:54:23 +0000 (UTC) Authentication-Results: smtp.kernel.org; dkim=pass (1024-bit key) header.d=zx2c4.com header.i=@zx2c4.com header.b="Xi9dVPyl" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zx2c4.com; s=20210105; t=1657104861; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=8hDvlRiKYKKncISowEKc7eKOFQFKssm7lpKW1dGlvUc=; b=Xi9dVPyl5gndWjCC0Hlq4pDPA0Pjec3fIEWESyNqlRqrZz3JFIH/VyHkDPB7al2oIiE6IE cfBPYiCxIkg1TfXdokZJGkgsKQXv+XdwCQ5uOo4GYPKoKfymC4WKdL483o8hrSRIt4ctnm fBqM9iSUHJ1fPqtj0DxrqDY+RfiS8So= Received: by mail.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id 39889fcf (TLSv1.3:AEAD-AES256-GCM-SHA384:256:NO); Wed, 6 Jul 2022 10:54:20 +0000 (UTC) From: "Jason A. Donenfeld" To: Borislav Petkov , "H. Peter Anvin" , "Jason A. Donenfeld" , linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org, Catalin Marinas , Will Deacon , Michael Ellerman , Heiko Carstens , Alexander Gordeev , Thomas Gleixner , Greg Kroah-Hartman , Arnd Bergmann Subject: [PATCH v3] random: remove CONFIG_ARCH_RANDOM Date: Wed, 6 Jul 2022 12:54:11 +0200 Message-Id: <20220706105411.406259-1-Jason@zx2c4.com> In-Reply-To: <20220706003225.335768-1-Jason@zx2c4.com> References: <20220706003225.335768-1-Jason@zx2c4.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220706_035429_991456_CF94CD07 X-CRM114-Status: GOOD ( 28.75 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org When RDRAND was introduced, there was much discussion on whether it should be trusted and how the kernel should handle that. Initially, two mechanisms cropped up, CONFIG_ARCH_RANDOM, a compile time switch, and "nordrand", a boot-time switch. Later the thinking evolved. With a properly designed RNG, using RDRAND values alone won't harm anything, even if the outputs are malicious. Rather, the issue is whether those values are being *trusted* to be good or not. And so a new set of options were introduced as the real ones that people use -- CONFIG_RANDOM_TRUST_CPU and "random.trust_cpu". With these options, RDRAND is used, but it's not always credited. So in the worst case, it does nothing, and in the best case, maybe it helps. Along the way, CONFIG_ARCH_RANDOM's meaning got sort of pulled into the center and became something certain platforms force-select. The old options don't really help with much, and it's a bit odd to have special handling for these instructions when the kernel can deal fine with the existence or untrusted existence or broken existence or non-existence of that CPU capability. So this commit simplifies things by removing CONFIG_ARCH_RANDOM, keeping the two options that are actually used. For now it leaves "nordrand" for now, as the removal of that will take a different route. Cc: Catalin Marinas Cc: Will Deacon Cc: Michael Ellerman Cc: Alexander Gordeev Cc: Thomas Gleixner Cc: H. Peter Anvin Acked-by: Heiko Carstens Acked-by: Greg Kroah-Hartman Signed-off-by: Jason A. Donenfeld Acked-by: Borislav Petkov --- Changes v2->v3: - Keep compiling on archs with no ARCH_RANDOM. Changes v1->v2: - Get rid of nordrand change for now. arch/arm64/Kconfig | 8 -------- arch/arm64/include/asm/archrandom.h | 14 ++++---------- arch/arm64/kernel/cpufeature.c | 2 -- arch/powerpc/Kconfig | 3 --- arch/powerpc/include/asm/archrandom.h | 15 ++------------- arch/powerpc/include/asm/machdep.h | 2 -- arch/powerpc/platforms/microwatt/Kconfig | 1 - arch/powerpc/platforms/powernv/Kconfig | 1 - arch/powerpc/platforms/pseries/Kconfig | 1 - arch/s390/Kconfig | 15 --------------- arch/s390/configs/zfcpdump_defconfig | 1 - arch/s390/crypto/Makefile | 2 +- arch/s390/include/asm/archrandom.h | 7 ++++--- arch/x86/Kconfig | 9 --------- arch/x86/include/asm/archrandom.h | 14 +++++--------- arch/x86/kernel/cpu/rdrand.c | 2 -- drivers/char/Kconfig | 1 - drivers/char/hw_random/s390-trng.c | 9 --------- include/linux/random.h | 12 +++++++++--- .../selftests/wireguard/qemu/kernel.config | 1 - 20 files changed, 25 insertions(+), 95 deletions(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 1652a9800ebe..1880f71c2547 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1858,14 +1858,6 @@ config ARM64_E0PD This option enables E0PD for TTBR1 where available. -config ARCH_RANDOM - bool "Enable support for random number generation" - default y - help - Random number generation (part of the ARMv8.5 Extensions) - provides a high bandwidth, cryptographically secure - hardware random number generator. - config ARM64_AS_HAS_MTE # Initial support for MTE went in binutils 2.32.0, checked with # ".arch armv8.5-a+memtag" below. However, this was incomplete diff --git a/arch/arm64/include/asm/archrandom.h b/arch/arm64/include/asm/archrandom.h index 3a6b6d38c5b8..2a99ac8b7811 100644 --- a/arch/arm64/include/asm/archrandom.h +++ b/arch/arm64/include/asm/archrandom.h @@ -2,8 +2,6 @@ #ifndef _ASM_ARCHRANDOM_H #define _ASM_ARCHRANDOM_H -#ifdef CONFIG_ARCH_RANDOM - #include #include #include @@ -72,6 +70,7 @@ static inline bool __must_check arch_get_random_long(unsigned long *v) return true; return false; } +#define arch_get_random_long arch_get_random_long static inline bool __must_check arch_get_random_int(unsigned int *v) { @@ -85,6 +84,7 @@ static inline bool __must_check arch_get_random_int(unsigned int *v) } return false; } +#define arch_get_random_int arch_get_random_int static inline bool __must_check arch_get_random_seed_long(unsigned long *v) { @@ -114,6 +114,7 @@ static inline bool __must_check arch_get_random_seed_long(unsigned long *v) return false; } +#define arch_get_random_seed_long arch_get_random_seed_long static inline bool __must_check arch_get_random_seed_int(unsigned int *v) { @@ -137,6 +138,7 @@ static inline bool __must_check arch_get_random_seed_int(unsigned int *v) return false; } +#define arch_get_random_seed_int arch_get_random_seed_int static inline bool __init __early_cpu_has_rndr(void) { @@ -167,12 +169,4 @@ arch_get_random_seed_long_early(unsigned long *v) } #define arch_get_random_seed_long_early arch_get_random_seed_long_early -#else /* !CONFIG_ARCH_RANDOM */ - -static inline bool __init smccc_probe_trng(void) -{ - return false; -} - -#endif /* CONFIG_ARCH_RANDOM */ #endif /* _ASM_ARCHRANDOM_H */ diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 8d88433de81d..0e9462abeb77 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2416,7 +2416,6 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .cpu_enable = cpu_enable_e0pd, }, #endif -#ifdef CONFIG_ARCH_RANDOM { .desc = "Random Number Generator", .capability = ARM64_HAS_RNG, @@ -2428,7 +2427,6 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .sign = FTR_UNSIGNED, .min_field_value = 1, }, -#endif #ifdef CONFIG_ARM64_BTI { .desc = "Branch Target Identification", diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index c2ce2e60c8f0..0d5757c125c4 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -1248,9 +1248,6 @@ config PHYSICAL_START default "0x00000000" endif -config ARCH_RANDOM - def_bool n - config PPC_LIB_RHEAP bool diff --git a/arch/powerpc/include/asm/archrandom.h b/arch/powerpc/include/asm/archrandom.h index 9a53e29680f4..fe94cbe4ad1b 100644 --- a/arch/powerpc/include/asm/archrandom.h +++ b/arch/powerpc/include/asm/archrandom.h @@ -2,20 +2,8 @@ #ifndef _ASM_POWERPC_ARCHRANDOM_H #define _ASM_POWERPC_ARCHRANDOM_H -#ifdef CONFIG_ARCH_RANDOM - #include -static inline bool __must_check arch_get_random_long(unsigned long *v) -{ - return false; -} - -static inline bool __must_check arch_get_random_int(unsigned int *v) -{ - return false; -} - static inline bool __must_check arch_get_random_seed_long(unsigned long *v) { if (ppc_md.get_random_seed) @@ -23,6 +11,7 @@ static inline bool __must_check arch_get_random_seed_long(unsigned long *v) return false; } +#define arch_get_random_seed_long arch_get_random_seed_long static inline bool __must_check arch_get_random_seed_int(unsigned int *v) { @@ -35,7 +24,7 @@ static inline bool __must_check arch_get_random_seed_int(unsigned int *v) return rc; } -#endif /* CONFIG_ARCH_RANDOM */ +#define arch_get_random_seed_int arch_get_random_seed_int #ifdef CONFIG_PPC_POWERNV int powernv_hwrng_present(void); diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h index 358d171ae8e0..6c1002043367 100644 --- a/arch/powerpc/include/asm/machdep.h +++ b/arch/powerpc/include/asm/machdep.h @@ -200,9 +200,7 @@ struct machdep_calls { ssize_t (*cpu_release)(const char *, size_t); #endif -#ifdef CONFIG_ARCH_RANDOM int (*get_random_seed)(unsigned long *v); -#endif }; extern void e500_idle(void); diff --git a/arch/powerpc/platforms/microwatt/Kconfig b/arch/powerpc/platforms/microwatt/Kconfig index 5e320f49583a..6af443a1db99 100644 --- a/arch/powerpc/platforms/microwatt/Kconfig +++ b/arch/powerpc/platforms/microwatt/Kconfig @@ -6,7 +6,6 @@ config PPC_MICROWATT select PPC_ICS_NATIVE select PPC_ICP_NATIVE select PPC_UDBG_16550 - select ARCH_RANDOM help This option enables support for FPGA-based Microwatt implementations. diff --git a/arch/powerpc/platforms/powernv/Kconfig b/arch/powerpc/platforms/powernv/Kconfig index 161dfe024085..e1a05c5a9004 100644 --- a/arch/powerpc/platforms/powernv/Kconfig +++ b/arch/powerpc/platforms/powernv/Kconfig @@ -12,7 +12,6 @@ config PPC_POWERNV select EPAPR_BOOT select PPC_INDIRECT_PIO select PPC_UDBG_16550 - select ARCH_RANDOM select CPU_FREQ select PPC_DOORBELL select MMU_NOTIFIER diff --git a/arch/powerpc/platforms/pseries/Kconfig b/arch/powerpc/platforms/pseries/Kconfig index f7fd91d153a4..f4a647c1f0b2 100644 --- a/arch/powerpc/platforms/pseries/Kconfig +++ b/arch/powerpc/platforms/pseries/Kconfig @@ -19,7 +19,6 @@ config PPC_PSERIES select PPC_UDBG_16550 select PPC_DOORBELL select HOTPLUG_CPU - select ARCH_RANDOM select FORCE_SMP select SWIOTLB default y diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 91c0b80a8bf0..28a958b900f1 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -508,21 +508,6 @@ config KEXEC_SIG verification for the corresponding kernel image type being loaded in order for this to work. -config ARCH_RANDOM - def_bool y - prompt "s390 architectural random number generation API" - help - Enable the s390 architectural random number generation API - to provide random data for all consumers within the Linux - kernel. - - When enabled the arch_random_* functions declared in linux/random.h - are implemented. The implementation is based on the s390 CPACF - instruction subfunction TRNG which provides a real true random - number generator. - - If unsure, say Y. - config KERNEL_NOBP def_bool n prompt "Enable modified branch prediction for the kernel by default" diff --git a/arch/s390/configs/zfcpdump_defconfig b/arch/s390/configs/zfcpdump_defconfig index a87fcc45e307..f4976f611b94 100644 --- a/arch/s390/configs/zfcpdump_defconfig +++ b/arch/s390/configs/zfcpdump_defconfig @@ -15,7 +15,6 @@ CONFIG_TUNE_ZEC12=y # CONFIG_COMPAT is not set CONFIG_NR_CPUS=2 CONFIG_HZ_100=y -# CONFIG_ARCH_RANDOM is not set # CONFIG_RELOCATABLE is not set # CONFIG_CHSC_SCH is not set # CONFIG_SCM_BUS is not set diff --git a/arch/s390/crypto/Makefile b/arch/s390/crypto/Makefile index c63abfeb6d17..1b1cc478fa94 100644 --- a/arch/s390/crypto/Makefile +++ b/arch/s390/crypto/Makefile @@ -15,7 +15,7 @@ obj-$(CONFIG_CRYPTO_CHACHA_S390) += chacha_s390.o obj-$(CONFIG_S390_PRNG) += prng.o obj-$(CONFIG_CRYPTO_GHASH_S390) += ghash_s390.o obj-$(CONFIG_CRYPTO_CRC32_S390) += crc32-vx_s390.o -obj-$(CONFIG_ARCH_RANDOM) += arch_random.o +obj-y += arch_random.o crc32-vx_s390-y := crc32-vx.o crc32le-vx.o crc32be-vx.o chacha_s390-y := chacha-glue.o chacha-s390.o diff --git a/arch/s390/include/asm/archrandom.h b/arch/s390/include/asm/archrandom.h index 5dc712fde3c7..a74a70ee2ee5 100644 --- a/arch/s390/include/asm/archrandom.h +++ b/arch/s390/include/asm/archrandom.h @@ -11,8 +11,6 @@ #ifndef _ASM_S390_ARCHRANDOM_H #define _ASM_S390_ARCHRANDOM_H -#ifdef CONFIG_ARCH_RANDOM - #include #include @@ -28,11 +26,13 @@ static inline bool __must_check arch_get_random_long(unsigned long *v) return s390_arch_get_random_long(v); return false; } +#define arch_get_random_long arch_get_random_long static inline bool __must_check arch_get_random_int(unsigned int *v) { return false; } +#define arch_get_random_int arch_get_random_int static inline bool __must_check arch_get_random_seed_long(unsigned long *v) { @@ -41,6 +41,7 @@ static inline bool __must_check arch_get_random_seed_long(unsigned long *v) } return false; } +#define arch_get_random_seed_long arch_get_random_seed_long static inline bool __must_check arch_get_random_seed_int(unsigned int *v) { @@ -49,6 +50,6 @@ static inline bool __must_check arch_get_random_seed_int(unsigned int *v) } return false; } +#define arch_get_random_seed_int arch_get_random_seed_int -#endif /* CONFIG_ARCH_RANDOM */ #endif /* _ASM_S390_ARCHRANDOM_H */ diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index be0b95e51df6..59b82135c814 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1833,15 +1833,6 @@ config ARCH_USES_PG_UNCACHED def_bool y depends on X86_PAT -config ARCH_RANDOM - def_bool y - prompt "x86 architectural random number generator" if EXPERT - help - Enable the x86 architectural RDRAND instruction - (Intel Bull Mountain technology) to generate random numbers. - If supported, this is a high bandwidth, cryptographically - secure hardware random number generator. - config X86_UMIP def_bool y prompt "User Mode Instruction Prevention" if EXPERT diff --git a/arch/x86/include/asm/archrandom.h b/arch/x86/include/asm/archrandom.h index ebc248e49549..fa7fd8d73ce7 100644 --- a/arch/x86/include/asm/archrandom.h +++ b/arch/x86/include/asm/archrandom.h @@ -65,37 +65,33 @@ static inline bool __must_check rdseed_int(unsigned int *v) /* * These are the generic interfaces; they must not be declared if the - * stubs in are to be invoked, - * i.e. CONFIG_ARCH_RANDOM is not defined. + * stubs in are to be invoked. */ -#ifdef CONFIG_ARCH_RANDOM static inline bool __must_check arch_get_random_long(unsigned long *v) { return static_cpu_has(X86_FEATURE_RDRAND) ? rdrand_long(v) : false; } +#define arch_get_random_long arch_get_random_long static inline bool __must_check arch_get_random_int(unsigned int *v) { return static_cpu_has(X86_FEATURE_RDRAND) ? rdrand_int(v) : false; } +#define arch_get_random_int arch_get_random_int static inline bool __must_check arch_get_random_seed_long(unsigned long *v) { return static_cpu_has(X86_FEATURE_RDSEED) ? rdseed_long(v) : false; } +#define arch_get_random_seed_long arch_get_random_seed_long static inline bool __must_check arch_get_random_seed_int(unsigned int *v) { return static_cpu_has(X86_FEATURE_RDSEED) ? rdseed_int(v) : false; } +#define arch_get_random_seed_int arch_get_random_seed_int extern void x86_init_rdrand(struct cpuinfo_x86 *c); -#else /* !CONFIG_ARCH_RANDOM */ - -static inline void x86_init_rdrand(struct cpuinfo_x86 *c) { } - -#endif /* !CONFIG_ARCH_RANDOM */ - #endif /* ASM_X86_ARCHRANDOM_H */ diff --git a/arch/x86/kernel/cpu/rdrand.c b/arch/x86/kernel/cpu/rdrand.c index c4be62058dd9..8f216669ecb8 100644 --- a/arch/x86/kernel/cpu/rdrand.c +++ b/arch/x86/kernel/cpu/rdrand.c @@ -26,7 +26,6 @@ __setup("nordrand", x86_rdrand_setup); */ #define SANITY_CHECK_LOOPS 8 -#ifdef CONFIG_ARCH_RANDOM void x86_init_rdrand(struct cpuinfo_x86 *c) { unsigned int changed = 0; @@ -63,4 +62,3 @@ void x86_init_rdrand(struct cpuinfo_x86 *c) "RDRAND gives funky smelling output, might consider not using it by booting with \"nordrand\""); } -#endif diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig index 0b6c03643ddc..30192e123e5f 100644 --- a/drivers/char/Kconfig +++ b/drivers/char/Kconfig @@ -431,7 +431,6 @@ config ADI config RANDOM_TRUST_CPU bool "Initialize RNG using CPU RNG instructions" default y - depends on ARCH_RANDOM help Initialize the RNG using random numbers supplied by the CPU's RNG instructions (e.g. RDRAND), if supported and available. These diff --git a/drivers/char/hw_random/s390-trng.c b/drivers/char/hw_random/s390-trng.c index 2beaa35c0d74..488808dc17a2 100644 --- a/drivers/char/hw_random/s390-trng.c +++ b/drivers/char/hw_random/s390-trng.c @@ -108,7 +108,6 @@ static ssize_t trng_counter_show(struct device *dev, { u64 dev_counter = atomic64_read(&trng_dev_counter); u64 hwrng_counter = atomic64_read(&trng_hwrng_counter); -#if IS_ENABLED(CONFIG_ARCH_RANDOM) u64 arch_counter = atomic64_read(&s390_arch_random_counter); return sysfs_emit(buf, @@ -118,14 +117,6 @@ static ssize_t trng_counter_show(struct device *dev, "total: %llu\n", dev_counter, hwrng_counter, arch_counter, dev_counter + hwrng_counter + arch_counter); -#else - return sysfs_emit(buf, - "trng: %llu\n" - "hwrng: %llu\n" - "total: %llu\n", - dev_counter, hwrng_counter, - dev_counter + hwrng_counter); -#endif } static DEVICE_ATTR(byte_counter, 0444, trng_counter_show, NULL); diff --git a/include/linux/random.h b/include/linux/random.h index 20e389a14e5c..085a707e0070 100644 --- a/include/linux/random.h +++ b/include/linux/random.h @@ -106,12 +106,18 @@ declare_get_random_var_wait(long, unsigned long) */ #include -#ifdef CONFIG_ARCH_RANDOM -# include -#else +#include + +#ifndef arch_get_random_long static inline bool __must_check arch_get_random_long(unsigned long *v) { return false; } +#endif +#ifndef arch_get_random_int static inline bool __must_check arch_get_random_int(unsigned int *v) { return false; } +#endif +#ifndef arch_get_random_seed_long static inline bool __must_check arch_get_random_seed_long(unsigned long *v) { return false; } +#endif +#ifndef arch_get_random_seed_int static inline bool __must_check arch_get_random_seed_int(unsigned int *v) { return false; } #endif diff --git a/tools/testing/selftests/wireguard/qemu/kernel.config b/tools/testing/selftests/wireguard/qemu/kernel.config index bad88f4b0a03..e1858ce7003f 100644 --- a/tools/testing/selftests/wireguard/qemu/kernel.config +++ b/tools/testing/selftests/wireguard/qemu/kernel.config @@ -58,7 +58,6 @@ CONFIG_NO_HZ_IDLE=y CONFIG_NO_HZ_FULL=n CONFIG_HZ_PERIODIC=n CONFIG_HIGH_RES_TIMERS=y -CONFIG_ARCH_RANDOM=y CONFIG_FILE_LOCKING=y CONFIG_POSIX_TIMERS=y CONFIG_DEVTMPFS=y