From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A7F45C433EF for ; Sat, 11 Jun 2022 15:10:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238156AbiFKPKr (ORCPT ); Sat, 11 Jun 2022 11:10:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43438 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237777AbiFKPKg (ORCPT ); Sat, 11 Jun 2022 11:10:36 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A59AC29355; Sat, 11 Jun 2022 08:10:34 -0700 (PDT) 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 57A85B801BE; Sat, 11 Jun 2022 15:10:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 81D18C3411B; Sat, 11 Jun 2022 15:10:31 +0000 (UTC) Authentication-Results: smtp.kernel.org; dkim=pass (1024-bit key) header.d=zx2c4.com header.i=@zx2c4.com header.b="cGYm9RxK" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zx2c4.com; s=20210105; t=1654960230; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=0LQjJTWz/52luVdReTEzZ+cYNsAEl10033oh+mJalHY=; b=cGYm9RxK/ieb0qRTsBiP6zy/JKkBcHPgu5Cx9SDNte4aAkcrGUDVCAnxZoUpD4TkMmcaNa KpvBn+ezV4HJWNcRH/ghV8nX9stepJVq+/C9HFnVVbYNMPWFwzsEtITiS7uAS7Q0tkXAjZ sY5+ZEQNFeVoYAHUly7UUxwZegz75pE= Received: by mail.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id bfdd7694 (TLSv1.3:AEAD-AES256-GCM-SHA384:256:NO); Sat, 11 Jun 2022 15:10:30 +0000 (UTC) From: "Jason A. Donenfeld" To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Michael Ellerman Cc: "Jason A. Donenfeld" , stable@vger.kernel.org, Christophe Leroy Subject: [PATCH v3 3/3] powerpc/pseries: wire up rng during setup_arch Date: Sat, 11 Jun 2022 17:10:15 +0200 Message-Id: <20220611151015.548325-4-Jason@zx2c4.com> In-Reply-To: <20220611151015.548325-1-Jason@zx2c4.com> References: <20220611151015.548325-1-Jason@zx2c4.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The platform's RNG must be available before random_init() in order to be useful for initial seeding, which in turn means that it needs to be called from setup_arch(), rather than from an init call. Fortunately, each platform already has a setup_arch function pointer, which means it's easy to wire this up. This commit also removes some noisy log messages that don't add much. Cc: stable@vger.kernel.org Cc: Michael Ellerman Cc: Christophe Leroy Fixes: a489043f4626 ("powerpc/pseries: Implement arch_get_random_long() based on H_RANDOM") Signed-off-by: Jason A. Donenfeld --- arch/powerpc/platforms/pseries/pseries.h | 2 ++ arch/powerpc/platforms/pseries/rng.c | 11 +++-------- arch/powerpc/platforms/pseries/setup.c | 1 + 3 files changed, 6 insertions(+), 8 deletions(-) diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h index f5c916c839c9..1d75b7742ef0 100644 --- a/arch/powerpc/platforms/pseries/pseries.h +++ b/arch/powerpc/platforms/pseries/pseries.h @@ -122,4 +122,6 @@ void pseries_lpar_read_hblkrm_characteristics(void); static inline void pseries_lpar_read_hblkrm_characteristics(void) { } #endif +void pseries_rng_init(void); + #endif /* _PSERIES_PSERIES_H */ diff --git a/arch/powerpc/platforms/pseries/rng.c b/arch/powerpc/platforms/pseries/rng.c index 6268545947b8..6ddfdeaace9e 100644 --- a/arch/powerpc/platforms/pseries/rng.c +++ b/arch/powerpc/platforms/pseries/rng.c @@ -10,6 +10,7 @@ #include #include #include +#include "pseries.h" static int pseries_get_random_long(unsigned long *v) @@ -24,19 +25,13 @@ static int pseries_get_random_long(unsigned long *v) return 0; } -static __init int rng_init(void) +void __init pseries_rng_init(void) { struct device_node *dn; dn = of_find_compatible_node(NULL, NULL, "ibm,random"); if (!dn) - return -ENODEV; - - pr_info("Registering arch random hook.\n"); - + return; ppc_md.get_random_seed = pseries_get_random_long; - of_node_put(dn); - return 0; } -machine_subsys_initcall(pseries, rng_init); diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index afb074269b42..ee4f1db49515 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -839,6 +839,7 @@ static void __init pSeries_setup_arch(void) } ppc_md.pcibios_root_bridge_prepare = pseries_root_bridge_prepare; + pseries_rng_init(); } static void pseries_panic(char *str) -- 2.35.1