From nobody Mon Feb 9 15:32:37 2026 Received: from mail-pf1-f176.google.com (mail-pf1-f176.google.com [209.85.210.176]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1B928228CB8 for ; Fri, 23 May 2025 10:21:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.176 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747995698; cv=none; b=c/mhnV1cG5ulKl6k8qEcvbZYtvNcBZPHYdQ2jLDr3gVBbcL+cI9dBwveR/x18kiBZsfyczgbWG2DwjI5GN0nVZF6CYHT1YAVjoGScq61fzoua6yUmPqDHOB19K3VIbkOUJ6Q9l0/GZ7m2mVLirU5SpYXSgoPWtbiazdndkK3ipo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747995698; c=relaxed/simple; bh=c4f/odBe1fiDkTMfaR/fNuZlpsRWRZtD8/pJ3r41/Zs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=oolJv7YwreWMrfO0OPuIBM79CJT8UNB9Q42AxyTR2JJJHaIILFyLRJlRxmlyMd0Jxc8/wwaCpLRHkCxftkFcmydWMShJlMyJTKLeAI6SGOC9slePF/cuMJSDQ4PwvAT7ZxDZTIHXVk7mLbBXfEbjqzIyLxiDcJDruAzvhOqfrAI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rivosinc.com; spf=pass smtp.mailfrom=rivosinc.com; dkim=pass (2048-bit key) header.d=rivosinc-com.20230601.gappssmtp.com header.i=@rivosinc-com.20230601.gappssmtp.com header.b=VmV+f/gc; arc=none smtp.client-ip=209.85.210.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rivosinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rivosinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=rivosinc-com.20230601.gappssmtp.com header.i=@rivosinc-com.20230601.gappssmtp.com header.b="VmV+f/gc" Received: by mail-pf1-f176.google.com with SMTP id d2e1a72fcca58-7398d65476eso576784b3a.1 for ; Fri, 23 May 2025 03:21:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20230601.gappssmtp.com; s=20230601; t=1747995696; x=1748600496; darn=vger.kernel.org; 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=zKzeirrOKR4aa1/jaJ0+BQzqdgTSTiQsfjIovf/XYis=; b=VmV+f/gcr0gd6z9RdhhhLb+amoi8ErezXx+8V7P1etvRj1S24KpgaBSTn4aPElA65r CRy4yV/V+YrcjjT99heI6nFezomvWODF6kF0jOSZRAQbJ/YoUjkuRwOjVBtpBjQLwyiD QisaXaYj9MiZD0kZrqh+xbiLgu0suqamvM+VkpPJniIvcuvoTmfP0/tmOcvStDqW4QVu 0sHkhehX5MHJ5tB0EK7gqVigdwRjJKTLYm8FaB0DE5pxU32nUhM+H3I/jbd7Q+I81cFX 93Awhe8GafzBLg+jllYE7PkHu6KD4loc89qBEtSTr7zkms8H7iGa0zwEtJD5yIf5+v26 8Uzg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1747995696; x=1748600496; 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=zKzeirrOKR4aa1/jaJ0+BQzqdgTSTiQsfjIovf/XYis=; b=QB86bg6yPQJH4pZ7Uk/9zJrkjO+Z9cORqKHJ5QaegGZuhjZHqB5s6DXjvlI9ix0TTI sqQ9tDPR6PNZFdmcOO6mxVnW0U9GI9DhiHRv/CGTP3fEL8Xg8wHvTDD7XGjV4TGTsWbE a5IAyfcVnGbsqboxAN4c+wwJdAnElkaoxXJLIi8k5rH7inwTeWBqrmcGwDBAXAW4zAzP Wm6XszukIWQ1KzBlewi2/WDl3L+g2nMdH1Rf0Wz+8C8Cbim8vO05clhbv1cRQvJTEP0g /sEEMYhMu4ULEHhqqQmSLTQyN3OeOh5PjTKwAyGiXCpvzW8XosCdGAxvF12nIi5s977X c/bg== X-Forwarded-Encrypted: i=1; AJvYcCUoodSB9m1XSwXveshThvnRtTPLEB1JrmuJvvQMfNAMp0duW3GzYL0w4czqH+/WbvzjcU3zjhQ74FEOTLQ=@vger.kernel.org X-Gm-Message-State: AOJu0YxaZh1Uu1/QhuEw+eOvBf9e3oSHMLTX6rSoU116a22sG/nA2xd9 wQ7PiPIUimDwRAbw3yJZvfxfN2oNjbdd/9TZrnjr3tmaFvqnoB7Ot46kdEvjCOtbRIc= X-Gm-Gg: ASbGncsmUz18LR/sjjDCKKW/7GqM/WA6m9l4zn48lcjA3moELJ9oiY3244ZuKFr7v9t c/qYZt5rMykzxFegbLehNPE1IRXSr+37g6BfYkVCCmSnfxk0QReZBEt5+8QCUpxcJeIrE5M75yO psfDEk6j9aQ+EHA4qJatCEsMYkQlhTB5PMQ0tQi1Oe13EgZHAcIqFWtI13Brei78uy2vQVbKFEc AA0qmT4V1LNmMTXYK/Tp8zbj/cuBNTOg7AnEgoXZ/BIXB+iF2MDWCOuLVjAF0+P+eCkPwsePJaL que7m1tIZC9KK9iCt59CVOpD9dLT+sXXvtLVYz1BzbBPo9TM5ifT X-Google-Smtp-Source: AGHT+IFz+/NIX8RZ4CpGdqDvwRIYbmRrE9EGaVbHiy5c0a/czfZB0pteCG9ARelWxW3OVz8OgvVZvw== X-Received: by 2002:a05:6a00:39a2:b0:736:b400:b58f with SMTP id d2e1a72fcca58-745eccdec15mr4787201b3a.0.1747995696348; Fri, 23 May 2025 03:21:36 -0700 (PDT) Received: from carbon-x1.. ([2a01:e0a:e17:9700:16d2:7456:6634:9626]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-742a9829ce8sm12466688b3a.118.2025.05.23.03.21.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 May 2025 03:21:35 -0700 (PDT) From: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= To: Paul Walmsley , Palmer Dabbelt , Anup Patel , Atish Patra , Shuah Khan , Jonathan Corbet , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-kselftest@vger.kernel.org Cc: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= , Samuel Holland , Andrew Jones , Deepak Gupta , Charlie Jenkins , Atish Patra Subject: [PATCH v8 05/14] riscv: sbi: add SBI FWFT extension calls Date: Fri, 23 May 2025 12:19:22 +0200 Message-ID: <20250523101932.1594077-6-cleger@rivosinc.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250523101932.1594077-1-cleger@rivosinc.com> References: <20250523101932.1594077-1-cleger@rivosinc.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Add FWFT extension calls. This will be ratified in SBI V3.0 hence, it is provided as a separate commit that can be left out if needed. Signed-off-by: Cl=C3=A9ment L=C3=A9ger Reviewed-by: Andrew Jones Reviewed-by: Atish Patra --- arch/riscv/kernel/sbi.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c index 818efafdc8e9..53836a9235e3 100644 --- a/arch/riscv/kernel/sbi.c +++ b/arch/riscv/kernel/sbi.c @@ -299,6 +299,8 @@ static int __sbi_rfence_v02(int fid, const struct cpuma= sk *cpu_mask, return 0; } =20 +static bool sbi_fwft_supported; + struct fwft_set_req { u32 feature; unsigned long value; @@ -326,7 +328,15 @@ static void cpu_sbi_fwft_set(void *arg) */ int sbi_fwft_set(u32 feature, unsigned long value, unsigned long flags) { - return -EOPNOTSUPP; + struct sbiret ret; + + if (!sbi_fwft_supported) + return -EOPNOTSUPP; + + ret =3D sbi_ecall(SBI_EXT_FWFT, SBI_EXT_FWFT_SET, + feature, value, flags, 0, 0, 0); + + return sbi_err_map_linux_errno(ret.error); } =20 /** @@ -348,6 +358,9 @@ int sbi_fwft_set_cpumask(const cpumask_t *mask, u32 fea= ture, .error =3D ATOMIC_INIT(0), }; =20 + if (!sbi_fwft_supported) + return -EOPNOTSUPP; + if (feature & SBI_FWFT_GLOBAL_FEATURE_BIT) return -EINVAL; =20 @@ -679,6 +692,11 @@ void __init sbi_init(void) pr_info("SBI DBCN extension detected\n"); sbi_debug_console_available =3D true; } + if (sbi_spec_version >=3D sbi_mk_version(3, 0) && + sbi_probe_extension(SBI_EXT_FWFT)) { + pr_info("SBI FWFT extension detected\n"); + sbi_fwft_supported =3D true; + } } else { __sbi_set_timer =3D __sbi_set_timer_v01; __sbi_send_ipi =3D __sbi_send_ipi_v01; --=20 2.49.0