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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EBC60CA0EED for ; Thu, 28 Aug 2025 19:01:08 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id ADF938E0031; Thu, 28 Aug 2025 15:01:03 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A1A638E0024; Thu, 28 Aug 2025 15:01:03 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 90A418E0031; Thu, 28 Aug 2025 15:01:03 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 7291D8E0024 for ; Thu, 28 Aug 2025 15:01:03 -0400 (EDT) Received: from smtpin17.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 39DEC5896B for ; Thu, 28 Aug 2025 19:01:03 +0000 (UTC) X-FDA: 83827083606.17.8D736DC Received: from mail-pg1-f170.google.com (mail-pg1-f170.google.com [209.85.215.170]) by imf24.hostedemail.com (Postfix) with ESMTP id 3660318000F for ; Thu, 28 Aug 2025 19:01:00 +0000 (UTC) Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=gmail.com header.s=20230601 header.b=Ir9aOMB1; spf=pass (imf24.hostedemail.com: domain of levymitchell0@gmail.com designates 209.85.215.170 as permitted sender) smtp.mailfrom=levymitchell0@gmail.com; dmarc=pass (policy=none) header.from=gmail.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1756407661; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=Bvt8V2L0ZNh+boeq/LSZQ3FvXwvuba2eMR3cn35JyVE=; b=2Eiha+bDbTYcn64yfsvDpBPLhJPpSuxjL0rJLRmESypNCmlOI0jKUurpi0V+rGfERIhYJs 9z0zOHaD3WsM5Bh32dxHlATMRr19xpLEQ2TriCnEuvEAH8YMdGkHkFOpC0DogeuJ4uUCmL tIluRyWKs91Egyw1cxEQ1uDvURICYKU= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1756407661; a=rsa-sha256; cv=none; b=TJQTYpOQPXPUhztfRgCufAWUTvMJ5X+YlczDGejhS0enl+8jvvN1IlXDkxzhwB9rE0ORJj 3uz/qGf2be5Pq9dTf/n1q8WWEBoeZr758I4DHTfp0+glYXgKjHSlnVyqjJ/qFpptCc3Rlt FXg4vfZ3OD0Sp1CzERFJ9eZnm5o2Y+k= ARC-Authentication-Results: i=1; imf24.hostedemail.com; dkim=pass header.d=gmail.com header.s=20230601 header.b=Ir9aOMB1; spf=pass (imf24.hostedemail.com: domain of levymitchell0@gmail.com designates 209.85.215.170 as permitted sender) smtp.mailfrom=levymitchell0@gmail.com; dmarc=pass (policy=none) header.from=gmail.com Received: by mail-pg1-f170.google.com with SMTP id 41be03b00d2f7-b49d98691faso1014285a12.1 for ; Thu, 28 Aug 2025 12:01:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1756407660; x=1757012460; darn=kvack.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=Bvt8V2L0ZNh+boeq/LSZQ3FvXwvuba2eMR3cn35JyVE=; b=Ir9aOMB15xjCcdzTc1r4Ryze0LhkvbCcfB1LHPInds26Kk0+HDVEJFBmpI90/T5+Lo WnQ0g/49CERS6u8rZI3LTNEttiV8G/6RUgif+EMysRLxfjjo4GTjB5DyQt7IcBt5Vnsd 5JF21b213ZhL2EmmZLZYrL/t8wHmukkuFYmsyiITMRKLr9AuKjX+eVOU2wnsFAq1blVO sAKrdGc2fxALkVKhQtfdd2gtQC884k0e/n6ihxLly5y9AyfyZCv7gAwjPF+9zroBAZA2 /bqppO463aZOTWl4lryt0eORzPDPpfVLvk2of07dUMNoH8BN0u7cdD7R3+V9gWmXoWPQ qqnw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756407660; x=1757012460; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Bvt8V2L0ZNh+boeq/LSZQ3FvXwvuba2eMR3cn35JyVE=; b=LnWRtqmotAmVRcTGwVJ8dqWP7P3/iA6QNXWsWONzB4V/n05xUxVmeUcSx/JNX7qczb 8JtnxT942OSigM1eS2jjVyXhZwCX4ox/0k4rM/A1wJ+YigIkRBIPPque9l8ZlUn0sil6 gaXLsFI4Og/KYMncJE85pYBZUCxoTkEkJzxN0Ahh+omqf4CxekzrIDcZhXOH3h0tAhlj nw3HqQnRAyi8Rf1nPcLLfLU7BHO48mzaHx+Wup4hL/SqZGrsnlqGYs6Ibnox9Cz+xGMP ff9CJaMxvtW6dd4xBmUDmXSYyoB9KIX2SZjZo/LclBgRZrjMaJxHpfkq5MiEtDcTU1H1 k/lg== X-Forwarded-Encrypted: i=1; AJvYcCXi9Px1UsYejxTN9DDQBd0BR+mxt0kaJR9uI3JAZJy8W8i6oQU9qh94f0Is9odA1Xa34F20S2FXkA==@kvack.org X-Gm-Message-State: AOJu0YwT6Jf/pJ3+WPZqMM2Hq+EtnGZHKPzKwU67sY0bTYqyYyZGpoOi ryB2o5+nj/EcnbY9XyuyGWHPSmXGm0Id/JWPJgFSNs38GjPPiKpBNRAq9+/6Ay9q X-Gm-Gg: ASbGncvVGKEoTeTUAgnGbbPcSLMW+uir2SXvFYbIOmsQuQGOIZGzxUhJ2Q7iUk+uxhX Ql2RBexJYrEUG0B0roa0glGBMcgBo7UV2/Wud27X0p+7ZbjUoLIguzDPy4FkD94T0MI38UBS3hk KEvAJuog3j8/PLxYeAHzKejmzJzEce+wXbPfgmdgQM7q7/RPn3+5/G7M5s4qDQB753AkRkjX+9M /kF+svjNokPvUgEuwDnpPx6mbyBS42KaFVpAhK95jvIJzTnxBcMGRm6D3d4e/7tiYUCzSYvJt/c Iym3/CLmYsd1ryCkPjB/1c3vLTGp2msgbKEEfzxUBx9x9MStzDJ+5lJVeCPkulfEfXmkjdN6xhh yo8M3RzsR4WhV93ntU+7QfdHHq9LHjrvM3M/YIY+py/e6hQ== X-Google-Smtp-Source: AGHT+IGQ0nXDwQcd/znOgAHZEvb/bzRjgwuKUmEsfOnNkUUtXy/qInCtHGgW4wGogHPA6Xq9dBOiiw== X-Received: by 2002:a17:90b:2810:b0:325:4c48:af54 with SMTP id 98e67ed59e1d1-3254c48af7fmr24907043a91.11.1756407659077; Thu, 28 Aug 2025 12:00:59 -0700 (PDT) Received: from mitchelllevy.localdomain ([174.127.224.194]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-327da8e5ad5sm405729a91.18.2025.08.28.12.00.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Aug 2025 12:00:58 -0700 (PDT) From: Mitchell Levy Date: Thu, 28 Aug 2025 12:00:11 -0700 Subject: [PATCH v3 4/7] rust: cpumask: Add getters for globally defined cpumasks MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250828-rust-percpu-v3-4-4dd92e1e7904@gmail.com> References: <20250828-rust-percpu-v3-0-4dd92e1e7904@gmail.com> In-Reply-To: <20250828-rust-percpu-v3-0-4dd92e1e7904@gmail.com> To: Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Andreas Hindborg , Alice Ryhl , Trevor Gross , Andrew Morton , Dennis Zhou , Tejun Heo , Christoph Lameter , Danilo Krummrich , Benno Lossin , Yury Norov , Viresh Kumar Cc: Tyler Hicks , linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-mm@kvack.org, Mitchell Levy X-Mailer: b4 0.14.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1756407651; l=3131; i=levymitchell0@gmail.com; s=20240719; h=from:subject:message-id; bh=7jLeexJ2MkarSDLXB95v3y9TJT2OgU8sLC2vrrP6MLQ=; b=zdA4F+LZY4slMG5Ve/I8Wi53or1iBeA2t76HP1S/w0KxfOdIOk6rZ4Cn8dc+CTq5sE+G9IGfS wDLwFlpvR9NCANhbfUBEg7Q4L7XNwOUKLYnJTuUUrEqPZkM8zn1ec0T X-Developer-Key: i=levymitchell0@gmail.com; a=ed25519; pk=n6kBmUnb+UNmjVkTnDwrLwTJAEKUfs2e8E+MFPZI93E= X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 3660318000F X-Stat-Signature: 4dh1quatomp915ocor3rypkq4dzun8en X-Rspam-User: X-HE-Tag: 1756407660-508492 X-HE-Meta: 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 ENmcW/cd 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Add getters for the global cpumasks documented in `include/linux/cpumask.h`, specifically: - cpu_possible_mask - cpu_online_mask - cpu_enabled_mask - cpu_present_mask - cpu_active_mask Signed-off-by: Mitchell Levy --- rust/kernel/cpumask.rs | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/rust/kernel/cpumask.rs b/rust/kernel/cpumask.rs index b7401848f59e..ca9aa6875b4a 100644 --- a/rust/kernel/cpumask.rs +++ b/rust/kernel/cpumask.rs @@ -77,6 +77,52 @@ pub unsafe fn as_ref<'a>(ptr: *const bindings::cpumask) -> &'a Self { unsafe { &*ptr.cast() } } + /// Get a CPU mask representing possible CPUs; has bit `cpu` set iff cpu is populatable + #[inline] + pub fn possible() -> &'static Self { + // SAFETY: `__cpu_possible_mask` is a valid global provided by the kernel that lives + // forever. + unsafe { Cpumask::as_ref(&raw const bindings::__cpu_possible_mask) } + } + + /// Get a CPU mask representing online CPUs; has bit `cpu` set iff cpu available to the + /// scheduler + #[inline] + pub fn online() -> &'static Self { + // SAFETY: `__cpu_online_mask` is a valid global provided by the kernel that lives forever. + // Since we wrap the returned pointer in an `Opaque`, it's ok that `__cpu_online_mask` + // may change its value. + unsafe { Cpumask::as_ref(&raw const bindings::__cpu_online_mask) } + } + + /// Get a CPU mask representing enabled CPUs; has bit `cpu` set iff cpu can be brought online + #[inline] + pub fn enabled() -> &'static Self { + // SAFETY: `__cpu_enabled_mask` is a valid global provided by the kernel that lives forever. + // Since we wrap the returned pointer in an `Opaque`, it's ok that `__cpu_enabled_mask` + // may change its value. + unsafe { Cpumask::as_ref(&raw const bindings::__cpu_enabled_mask) } + } + + /// Get a CPU mask representing present CPUs; has bit `cpu` set iff cpu is populated + #[inline] + pub fn present() -> &'static Self { + // SAFETY: `__cpu_present_mask` is a valid global provided by the kernel that lives + // forever. Since we wrap the returned pointer in an `Opaque`, it's ok that + // `__cpu_present_mask` may change its value. + unsafe { Cpumask::as_ref(&raw const bindings::__cpu_present_mask) } + } + + /// Get a CPU mask representing active CPUs; has bit `cpu` set iff cpu is available to + /// migration. + #[inline] + pub fn active() -> &'static Self { + // SAFETY: `__cpu_active_mask` is a valid global provided by the kernel that lives forever. + // Since we wrap the returned pointer in an `Opaque`, it's ok that `__cpu_active_mask` + // may change its value. + unsafe { Cpumask::as_ref(&raw const bindings::__cpu_active_mask) } + } + /// Obtain the raw `struct cpumask` pointer. pub fn as_raw(&self) -> *mut bindings::cpumask { let this: *const Self = self; -- 2.34.1