From nobody Mon Feb 9 23:15:52 2026 Received: from mail-wm1-f50.google.com (mail-wm1-f50.google.com [209.85.128.50]) (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 457D128D840 for ; Thu, 15 May 2025 08:23:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.50 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747297434; cv=none; b=qh1nzGjzZldbwNlhnyHmpGOIeEC8JKO2/xBmjlKcdMC2MT6sulHOmXj1EhLrAoXkcHrqHetnRrkqCBaGRelqOCmEcbPFxvemxcDtzySI6FDxXNN/rQkdfOXcKs+Eou6GrLYGuVOk5imbLVRHx+R8rSv8KqyD9t4y2oF/1x5+P7c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747297434; 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=Z0KrQtQ0EnTXVUyX7inEnMkxzfkLH/60daiff2OY6KpjgmZN8t8Oo3NSy3mwgq2KaJx6o+XJCFAsfKEltFUUW5xY3XDu7E54jEK23gw2fWQ0ni6UGuducUNX6YOeN0n6YYQfT4SeLbjn3nu24UmTyku9GTIuoYIBgMbyA2RqgP0= 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=nK0y0Cee; arc=none smtp.client-ip=209.85.128.50 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="nK0y0Cee" Received: by mail-wm1-f50.google.com with SMTP id 5b1f17b1804b1-442ed8a275fso7112195e9.2 for ; Thu, 15 May 2025 01:23:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20230601.gappssmtp.com; s=20230601; t=1747297430; x=1747902230; 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=nK0y0Cee/rnnhvO27+PYyKapRS97jXMC80m8bOAj9nIkHz1Y1tG93OV4LlJS1MTeV+ kw7IrJ8Xp9zF8Ry6RQYtiHYSzmHaYvP1Y08TqSHBQumOEgln2np97XDDr+YHxN0+ocKq hlxkvcOVpp6qg2+NcxI5NDVfV41i+zPal65QfGVlTPgdnATYn6djGZDv0sCbxdtzIMBo yaf49SnPAVPns1LmI6ec/LSjDaikw3kMn6ijGAwMukhIEf6p8w0LRkcp/zmg5a3cNUn7 ZT7VJNqMqWHHYDTguU5d0TIXLZZFbWFALQ+VTPeDOXe1x+J1u0ExJ4SwPkf8241zl/g6 RJIQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1747297431; x=1747902231; 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=TB+PWIiUeZL1ENsLoRPD0rfO486BQ7vBjcSnHxtLcUxQ46TgwTsHn42KDlr5MAqRAl vgtrDn5/nYJoemvQJog+ZECPv0J95gxao8IdTruJwQMPYSWW1O7xiKmzRS1xJ81nCjdI 29dVTccmkMOe9VuVyUGkr6nLQkSZqKvVTf/4xSOVROQlQpmvaOlTPiKT33FFSrFnSuTW PLI/n5CX9kVaPY2/pzds0B3FWz9j0EaZS07lmUR1bNw/X2QHo8KAh968cGcLE64dX9ae tnGgm8E8ycczf1kpZp80N7QGaQgsUDgzWWbHIyuTZBt8s2p2uI1Y7sWY5I7sWybUXpmT H3cw== X-Forwarded-Encrypted: i=1; AJvYcCW6Uy2xZQ64KVgXBOKtaRHa43EaxD+VxRUrbajQ4ahDMyqHInOg0rfIbwrvGah33RgSeKFgwTSMjQ7K3Yg=@vger.kernel.org X-Gm-Message-State: AOJu0Yw774wFrJ0/4NcZvexH69uy+itTNAtRHxKk4dlzBCmrUVF6VL0m jZ6YK3i/Izuca77DkMXOVkYEAytgXZGNawUi7hQQk4LWXfLrWx2642C/g0Suk+g= X-Gm-Gg: ASbGncuezyXgFH/ty5SWKyQ5g6K4U+U+4vC5fQfiH9Tbq6qu1xf7XpmLLaxdiPKj96+ I4tOAptf61A3/gTF5ockoG+5WdKYW7fY+fgxGq4e/PZPe7OE3X1xySgYwQbBI9CqndQwbr32JYu mk969pl2hgkmMSivIQhXxlk8+92OZ07EVvV+aU23Wnr0Po+VelwWT7T4CKhkBMl+n08r1Pk+pzn euVFfOyWlwYqEveMWbYY16LX1+mS9VKrTWEVzcYgK7SLtbMiDmrizQ+4oCiGgvPftQEGmIrAwxF n6mbLVYA8o7p5saw2O/hA9o4iWfWy7KGTE9oOo8LBOyVaETXrSk= X-Google-Smtp-Source: AGHT+IHo18Wz0xfwowIAkjj7FGe8ulZGDuitOfmnOSRcK7rM7RV/Qat3DxuhXQ8uvVsICI2vUu48rQ== X-Received: by 2002:a05:600c:8411:b0:442:faa3:fadb with SMTP id 5b1f17b1804b1-442faa3fbb1mr9904825e9.2.1747297430595; Thu, 15 May 2025 01:23:50 -0700 (PDT) Received: from carbon-x1.. ([91.197.138.148]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-442f395166fsm59310785e9.18.2025.05.15.01.23.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 15 May 2025 01:23:49 -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 , Atish Patra Subject: [PATCH v7 05/14] riscv: sbi: add SBI FWFT extension calls Date: Thu, 15 May 2025 10:22:06 +0200 Message-ID: <20250515082217.433227-6-cleger@rivosinc.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250515082217.433227-1-cleger@rivosinc.com> References: <20250515082217.433227-1-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