From patchwork Thu Sep 1 22:27:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heiko Stuebner X-Patchwork-Id: 12963410 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 9DCDDECAAD2 for ; Thu, 1 Sep 2022 22:39:09 +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:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=27EPwngQ1y534XxMXOAhoJISKrQmEgUmo8scj9D6qWE=; b=XNPoovwZeH0+UT z9Jv7X4ISf464mi5zLRjkpd0+Tki0rOlhUTtuuhaKmf1g28C9di6KAmZljOt3zZJOVzKOVAbNeGKK LZGAAfmSLp397PdVJ99ZSSErWOBqaiAE+uc0b0iOfQe58ypcWn/zdURQ1myebh5M6lKNIEnROxiGt R+Vj+VqPTBPcJ3eeQpdwEqPb7nmbv8+eOrawLoGebsy05buPG4kEhuq4YNfkBts115yUl5hdwNK80 HQlKbB7ySMiFqJcegjDkfcnc8GXms41W7vPz3gbldms+TF7l9EKrD03d5uFd3ymH6uv4Oe29RfSLy Td5PK7EZ7Bv83UQwomfQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oTspu-00FRmO-GD; Thu, 01 Sep 2022 22:38:58 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oTsfh-00FLJy-G2 for linux-riscv@lists.infradead.org; Thu, 01 Sep 2022 22:28:26 +0000 Received: from ip5b412258.dynamic.kabel-deutschland.de ([91.65.34.88] helo=phil.lan) by gloria.sntech.de with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1oTsfV-0007wk-PN; Fri, 02 Sep 2022 00:28:13 +0200 From: Heiko Stuebner To: paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu Cc: conor.dooley@microchip.com, guoren@kernel.org, apatel@ventanamicro.com, atishp@rivosinc.com, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Heiko Stuebner Subject: [PATCH 1/4] riscv: cleanup svpbmt cpufeature probing Date: Fri, 2 Sep 2022 00:27:41 +0200 Message-Id: <20220901222744.2210215-1-heiko@sntech.de> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220901_152825_577743_87C6EEC5 X-CRM114-Status: GOOD ( 10.61 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org This can also do without the ifdef and use IS_ENABLED instead and for better readability, getting rid of that switch also seems waranted. Signed-off-by: Heiko Stuebner Reviewed-by: Guo Ren Reviewed-by: Conor Dooley Reviewed-by: Andrew Jones Reviewed-by: Andrew Jones --- arch/riscv/kernel/cpufeature.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index 553d755483ed..764ea220161f 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -253,16 +253,13 @@ void __init riscv_fill_hwcap(void) #ifdef CONFIG_RISCV_ALTERNATIVE static bool __init_or_module cpufeature_probe_svpbmt(unsigned int stage) { -#ifdef CONFIG_RISCV_ISA_SVPBMT - switch (stage) { - case RISCV_ALTERNATIVES_EARLY_BOOT: + if (!IS_ENABLED(CONFIG_RISCV_ISA_SVPBMT)) return false; - default: - return riscv_isa_extension_available(NULL, SVPBMT); - } -#endif - return false; + if (stage == RISCV_ALTERNATIVES_EARLY_BOOT) + return false; + + return riscv_isa_extension_available(NULL, SVPBMT); } static bool __init_or_module cpufeature_probe_zicbom(unsigned int stage) From patchwork Thu Sep 1 22:27:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heiko Stuebner X-Patchwork-Id: 12963411 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 354D9ECAAD2 for ; Thu, 1 Sep 2022 22:39:17 +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:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=GS4xtAd4gL1JQ6Jmj2sZjqnTrf/jOPPaZ1S6iU1adHQ=; b=XiY0w2vzIrP//q 0fOS+QhXGToFH6jb+vOC9X8KOgjQ0g57pSkFDDA0YCu/+5cNXCR4svhiNCULrU/wvrbtpaPJEyuu2 JmHcD2547ufmpHtn31xpJjRM9L45pxLj1XQ4tlI5RlFKBseupu0LzOgCHjMe97HnXHd27fl4Ld1t/ 8I+fjhYaJ6uFUwDQm9HZGGnLz0KAWf11Gi/vgj5Sln4CsJnH68icbvA/GRWF8+qGzK9qywTJ2Ly0X zgwWTezhZ29dzzR59aJU1a6CSbNZ7s42LW7qR5VvZZE26Pmctc6LQq0fSCn5kyi5gE4ugCURirWgU hGzBJg82gg3KHMpv4W2A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oTspy-00FRp8-Gs; Thu, 01 Sep 2022 22:39:02 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oTsfh-00FLJE-G1 for linux-riscv@lists.infradead.org; Thu, 01 Sep 2022 22:28:28 +0000 Received: from ip5b412258.dynamic.kabel-deutschland.de ([91.65.34.88] helo=phil.lan) by gloria.sntech.de with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1oTsfW-0007wk-5B; Fri, 02 Sep 2022 00:28:14 +0200 From: Heiko Stuebner To: paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu Cc: conor.dooley@microchip.com, guoren@kernel.org, apatel@ventanamicro.com, atishp@rivosinc.com, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Heiko Stuebner Subject: [PATCH 2/4] riscv: drop some idefs from CMO initialization Date: Fri, 2 Sep 2022 00:27:42 +0200 Message-Id: <20220901222744.2210215-2-heiko@sntech.de> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220901222744.2210215-1-heiko@sntech.de> References: <20220901222744.2210215-1-heiko@sntech.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220901_152825_663181_FD62E26B X-CRM114-Status: GOOD ( 12.49 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Wrapping things in #ifdefs makes the code harder to read while we also have IS_ENABLED() macros to do this in regular code and the extension detection is not _that_ runtime critical. So define a stub for riscv_noncoherent_supported() in the non-CONFIG_RISCV_DMA_NONCOHERENT case and move the code to us IS_ENABLED. Suggested-by: Conor Dooley Signed-off-by: Heiko Stuebner Reviewed-by: Guo Ren Reviewed-by: Conor Dooley Reviewed-by: Andrew Jones --- arch/riscv/errata/thead/errata.c | 7 +++---- arch/riscv/include/asm/cacheflush.h | 2 ++ arch/riscv/kernel/cpufeature.c | 22 +++++++++------------- 3 files changed, 14 insertions(+), 17 deletions(-) diff --git a/arch/riscv/errata/thead/errata.c b/arch/riscv/errata/thead/errata.c index 202c83f677b2..bffa711aaf64 100644 --- a/arch/riscv/errata/thead/errata.c +++ b/arch/riscv/errata/thead/errata.c @@ -30,7 +30,9 @@ static bool errata_probe_pbmt(unsigned int stage, static bool errata_probe_cmo(unsigned int stage, unsigned long arch_id, unsigned long impid) { -#ifdef CONFIG_ERRATA_THEAD_CMO + if (!IS_ENABLED(CONFIG_ERRATA_THEAD_CMO)) + return false; + if (arch_id != 0 || impid != 0) return false; @@ -39,9 +41,6 @@ static bool errata_probe_cmo(unsigned int stage, riscv_noncoherent_supported(); return true; -#else - return false; -#endif } static u32 thead_errata_probe(unsigned int stage, diff --git a/arch/riscv/include/asm/cacheflush.h b/arch/riscv/include/asm/cacheflush.h index a60acaecfeda..4363d0beb38a 100644 --- a/arch/riscv/include/asm/cacheflush.h +++ b/arch/riscv/include/asm/cacheflush.h @@ -50,6 +50,8 @@ static inline void riscv_init_cbom_blocksize(void) { } #ifdef CONFIG_RISCV_DMA_NONCOHERENT void riscv_noncoherent_supported(void); +#else +static inline void riscv_noncoherent_supported(void) {} #endif /* diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index 764ea220161f..729f7a218093 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -264,21 +264,17 @@ static bool __init_or_module cpufeature_probe_svpbmt(unsigned int stage) static bool __init_or_module cpufeature_probe_zicbom(unsigned int stage) { -#ifdef CONFIG_RISCV_ISA_ZICBOM - switch (stage) { - case RISCV_ALTERNATIVES_EARLY_BOOT: + if (!IS_ENABLED(CONFIG_RISCV_ISA_ZICBOM)) + return false; + + if (stage == RISCV_ALTERNATIVES_EARLY_BOOT) + return false; + + if (!riscv_isa_extension_available(NULL, ZICBOM)) return false; - default: - if (riscv_isa_extension_available(NULL, ZICBOM)) { - riscv_noncoherent_supported(); - return true; - } else { - return false; - } - } -#endif - return false; + riscv_noncoherent_supported(); + return true; } /* From patchwork Thu Sep 1 22:27:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heiko Stuebner X-Patchwork-Id: 12963408 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 7E46EECAAD3 for ; Thu, 1 Sep 2022 22:39:03 +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:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=fu9omxeuiJDP/6BDE3YSnSAVxOGjSvXlwEos8LR7z2w=; b=PD95gunwCcVVOd pxKLpsWjKUXioLbFQpWZmS3ui9pxSqPf3toJy06K/gkm1yVo/wDw1A1L+QbGAQNlH5T1O4997IIjB p25QzjkPzM6lqD7jsjs4dnB38Ar1mvz/0YcUEFgHglZinAQFHf00xDjGCP/4M+HIhy9nIgl1JhcK0 AWU/cf8dnhHQcUTEqBGFGAWtEXCGkhPiWkdfjQ4SVtXMgaFhIja/KQ8g9RHS38DCIAVV/g0n/vcFl YbOekGPCTs9X/fZeCzaL/wzXDD96oRr1fhjzdv0P6H5CtgJ4u7WNeBlNpTgdCEBScbPB8H3JESeGk iLhZgQI/1ixm42qJl4XA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oTspj-00FRdt-QZ; Thu, 01 Sep 2022 22:38:47 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oTsfh-00FLJR-G3 for linux-riscv@lists.infradead.org; Thu, 01 Sep 2022 22:28:28 +0000 Received: from ip5b412258.dynamic.kabel-deutschland.de ([91.65.34.88] helo=phil.lan) by gloria.sntech.de with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1oTsfW-0007wk-Gz; Fri, 02 Sep 2022 00:28:14 +0200 From: Heiko Stuebner To: paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu Cc: conor.dooley@microchip.com, guoren@kernel.org, apatel@ventanamicro.com, atishp@rivosinc.com, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Heiko Stuebner Subject: [PATCH 3/4] riscv: use BIT macros in t-head errata init Date: Fri, 2 Sep 2022 00:27:43 +0200 Message-Id: <20220901222744.2210215-3-heiko@sntech.de> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220901222744.2210215-1-heiko@sntech.de> References: <20220901222744.2210215-1-heiko@sntech.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220901_152825_582442_E82F42D7 X-CRM114-Status: GOOD ( 11.24 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Using the appropriate BIT macro makes the code better readable. Suggested-by: Conor Dooley Signed-off-by: Heiko Stuebner Reviewed-by: Guo Ren Reviewed-by: Conor Dooley Reviewed-by: Andrew Jones --- arch/riscv/errata/thead/errata.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/riscv/errata/thead/errata.c b/arch/riscv/errata/thead/errata.c index bffa711aaf64..a6f4bd8ccf3f 100644 --- a/arch/riscv/errata/thead/errata.c +++ b/arch/riscv/errata/thead/errata.c @@ -49,10 +49,10 @@ static u32 thead_errata_probe(unsigned int stage, u32 cpu_req_errata = 0; if (errata_probe_pbmt(stage, archid, impid)) - cpu_req_errata |= (1U << ERRATA_THEAD_PBMT); + cpu_req_errata |= BIT(ERRATA_THEAD_PBMT); if (errata_probe_cmo(stage, archid, impid)) - cpu_req_errata |= (1U << ERRATA_THEAD_CMO); + cpu_req_errata |= BIT(ERRATA_THEAD_CMO); return cpu_req_errata; } From patchwork Thu Sep 1 22:27:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heiko Stuebner X-Patchwork-Id: 12963409 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 C8418ECAAD3 for ; Thu, 1 Sep 2022 22:39:07 +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:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=rsI/UqwZ6ehpQsUSvQpocJb1/a3HR9LuIfAm29rb4/I=; b=hogLNwH2xlULfr Es9ut4em92OLxczYPFH/CO+w8jHPwdyFNKcWASkFw0fohOB+FfUUDzmvjE8anNou4KuvEhOQ8eUZZ 7BQhysRfloU6nBjPbExQ6YkQG98wk+vvtRyIiXtcggjgBXSHHl0CGgkeMQL0oWsZPmmJvMimVH76Z exR30D4aImtEtrCByz0dnLcAZBnBpe0OyT2b2sWa+q2iGZqczNaG/l/ktnwAnmwt2sWyfyImyUCQ/ YUIaPFeQyw2Fxin1scJY+PKIdINWcEMfI7pZRtsxnZKhULLJ07v5/EdVTxgV2/r5E0Vd4o+x4lUOj 8prRRSBYxDhCZEMAX+3g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oTspr-00FRjX-1a; Thu, 01 Sep 2022 22:38:55 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oTsfh-00FLKA-Fz for linux-riscv@lists.infradead.org; Thu, 01 Sep 2022 22:28:26 +0000 Received: from ip5b412258.dynamic.kabel-deutschland.de ([91.65.34.88] helo=phil.lan) by gloria.sntech.de with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1oTsfW-0007wk-Sn; Fri, 02 Sep 2022 00:28:14 +0200 From: Heiko Stuebner To: paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu Cc: conor.dooley@microchip.com, guoren@kernel.org, apatel@ventanamicro.com, atishp@rivosinc.com, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Heiko Stuebner Subject: [PATCH 4/4] riscv: check for kernel config option in t-head memory types errata Date: Fri, 2 Sep 2022 00:27:44 +0200 Message-Id: <20220901222744.2210215-4-heiko@sntech.de> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220901222744.2210215-1-heiko@sntech.de> References: <20220901222744.2210215-1-heiko@sntech.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220901_152825_569802_4DEFB1CE X-CRM114-Status: GOOD ( 10.95 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org The t-head variant of page-based memory types should also check first for the enabled kernel config option. Signed-off-by: Heiko Stuebner Reviewed-by: Conor Dooley Reviewed-by: Andrew Jones --- arch/riscv/errata/thead/errata.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/riscv/errata/thead/errata.c b/arch/riscv/errata/thead/errata.c index a6f4bd8ccf3f..902e12452821 100644 --- a/arch/riscv/errata/thead/errata.c +++ b/arch/riscv/errata/thead/errata.c @@ -17,6 +17,9 @@ static bool errata_probe_pbmt(unsigned int stage, unsigned long arch_id, unsigned long impid) { + if (!IS_ENABLED(CONFIG_ERRATA_THEAD_PBMT)) + return false; + if (arch_id != 0 || impid != 0) return false;