From nobody Sat Feb 7 11:41:19 2026 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 4480DC3DA7D for ; Tue, 3 Jan 2023 14:12:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237840AbjACOMy (ORCPT ); Tue, 3 Jan 2023 09:12:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58924 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237837AbjACOMl (ORCPT ); Tue, 3 Jan 2023 09:12:41 -0500 Received: from mail-pj1-x102e.google.com (mail-pj1-x102e.google.com [IPv6:2607:f8b0:4864:20::102e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C312911A13 for ; Tue, 3 Jan 2023 06:12:39 -0800 (PST) Received: by mail-pj1-x102e.google.com with SMTP id o21so2861744pjw.0 for ; Tue, 03 Jan 2023 06:12:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=F7ob+2vX2/dVNm5GFakcAOJyyRuKnpkny5ZMoNumsbg=; b=SC2efmYBg1+mzWG7pzPU4iMr+PFRDzvoSWpPlMH6YKZt+hR0iPxqcmZWSNcJZCwK+V wGRjiEBBWXFHOjS8klcs14FF4xiO7xLK0pCoqBYolvIG1iykE4ltt2whCD6AO6Aso8Kn MzrWZDqM22mMPuAXNi7yVnIy/CsR5G1o0diamtaLsY1wKt4FJ+iavxU0hkGBvYYRtGxP +LGdmSucXk4gNVRAfh678TYbLDK0rOVPEpKdlx1zTtJ/AqLzEk8LgJ9q+0h9Lg16rfzH aHkp/bUkC7wYGRYNge/xd9Kd/a/t0IGbIYnEGcKqq8VqYT6t2dXt6RNKDrkctboafOl8 TwTw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=F7ob+2vX2/dVNm5GFakcAOJyyRuKnpkny5ZMoNumsbg=; b=n9VRzfAKkPbE3ZphuKazUwR8bwQGNjkQ6atj5xAzlUAZV0lTL0wJSSF9XM/Sj0dpUJ hRKmyXTHhnoObq3JLG5AP60YEAHVfQv/WFXsUToR4MdD+Y5/yhtwYaHkQpmVY5et27gj DhO5FDpltI/DRmSWYLgPgTJvNCXX6VcE7oBLTozndnH1gEB7Bhm3fkCx67XwU9vhdnnp jLUmtsCFk0dNu93XRpYRNm4l6Gj5fn91ItRWtkXLUxTr3zIxbeCPo7xZbpudAxHx5iqb msDs2lXGB/yF3OtOffxRSEOrjxA0ZHlHwby1MbvPSU6htwdtBGibnt0b4kNLiB3dklB1 S71w== X-Gm-Message-State: AFqh2kqkumUBHDfRQTzzevG2KZ/0O7xyDjZMOjvLYK+4tFkTybxoYswm s9efsuyLtpTm7ka4cv6mtVswmA== X-Google-Smtp-Source: AMrXdXsdaNFT9PfPhIcXX2+sh5QFHWfKnommCCIjPlGRE8sR3Zqyk6aDdAW9OIFDQIqGWaWuBKBr1g== X-Received: by 2002:a17:903:2411:b0:192:d9dd:167d with SMTP id e17-20020a170903241100b00192d9dd167dmr3077913plo.43.1672755159141; Tue, 03 Jan 2023 06:12:39 -0800 (PST) Received: from anup-ubuntu-vm.localdomain ([171.76.85.241]) by smtp.gmail.com with ESMTPSA id x16-20020a1709027c1000b00192b0a07891sm8598286pll.101.2023.01.03.06.12.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Jan 2023 06:12:38 -0800 (PST) From: Anup Patel To: Palmer Dabbelt , Paul Walmsley , Thomas Gleixner , Marc Zyngier , Daniel Lezcano Cc: Hector Martin , Sven Peter , Alyssa Rosenzweig , Atish Patra , Alistair Francis , Anup Patel , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, asahi@lists.linux.dev, Anup Patel , Bin Meng , Atish Patra Subject: [PATCH v16 1/9] RISC-V: Clear SIP bit only when using SBI IPI operations Date: Tue, 3 Jan 2023 19:42:13 +0530 Message-Id: <20230103141221.772261-2-apatel@ventanamicro.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230103141221.772261-1-apatel@ventanamicro.com> References: <20230103141221.772261-1-apatel@ventanamicro.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The software interrupt pending (i.e. [M|S]SIP) bit is writeable for S-mode but read-only for M-mode so we clear this bit only when using SBI IPI operations. Signed-off-by: Anup Patel Reviewed-by: Bin Meng Reviewed-by: Atish Patra --- arch/riscv/kernel/sbi.c | 8 +++++++- arch/riscv/kernel/smp.c | 2 -- 2 files changed, 7 insertions(+), 3 deletions(-) diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c index 5c87db8fdff2..ac99a70ead6a 100644 --- a/arch/riscv/kernel/sbi.c +++ b/arch/riscv/kernel/sbi.c @@ -646,8 +646,14 @@ static void sbi_send_cpumask_ipi(const struct cpumask = *target) sbi_send_ipi(target); } =20 +static void sbi_ipi_clear(void) +{ + csr_clear(CSR_IP, IE_SIE); +} + static const struct riscv_ipi_ops sbi_ipi_ops =3D { - .ipi_inject =3D sbi_send_cpumask_ipi + .ipi_inject =3D sbi_send_cpumask_ipi, + .ipi_clear =3D sbi_ipi_clear }; =20 void __init sbi_init(void) diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c index 8c3b59f1f9b8..8a12768c09ee 100644 --- a/arch/riscv/kernel/smp.c +++ b/arch/riscv/kernel/smp.c @@ -112,8 +112,6 @@ void riscv_clear_ipi(void) { if (ipi_ops && ipi_ops->ipi_clear) ipi_ops->ipi_clear(); - - csr_clear(CSR_IP, IE_SIE); } EXPORT_SYMBOL_GPL(riscv_clear_ipi); =20 --=20 2.34.1