From patchwork Wed Nov 27 16:15:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Patryk Wlazlyn X-Patchwork-Id: 13887187 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6F5AB20101D; Wed, 27 Nov 2024 16:15:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.9 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732724159; cv=none; b=toU7QJisp5ww04uM5UH459YKm0lQJF9mEGFKmhW5iVI2/tkv44nRuOGGskQCga8xOWUupf1cFq3+8w2z3Oq7ecTnJBiW/OblTbDDUwb9Ln8vuNpRkyMJ2juhFdTDIz2fC+V+PLtw9DLje2nL7WHtDNLkgZ0Pc3Rds3XzUJMKSRA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732724159; c=relaxed/simple; bh=IZig5JtFcVJFRtGodHb1nn1SdFNHH+WZ6d68k4Fox6I=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FeJGLLX8fq2AG2j/SPxC9S3w3WjcTGQ043HWsPSjRbaWTsxj7iiIVROqW6OKNw22aqkk+PwarIMjQ8QmMssrdbtqv4HcJGpWBejy8KN2IZ01j5hW/mdpDxam9sFg6f1vJzUa4Ho8MVtg2M5i+IwU7TZxB0cSoDZ90F4gAoPEN9I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=kt3vq59K; arc=none smtp.client-ip=192.198.163.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="kt3vq59K" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1732724157; x=1764260157; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=IZig5JtFcVJFRtGodHb1nn1SdFNHH+WZ6d68k4Fox6I=; b=kt3vq59K3/htemCf3F6cHaSS8DMuqD8IpLF8ZW+91QOTSmfodUen+9Q1 Idx6wp4LrRgbbi7XoYJVQWjrhiOIwSpePgQo+/YX0CnzYJzrQJrmwN97Q wmaZPU2o+aq99lQV5Msx4WgpNknNvUR9Y6OtcyYp8CjG6FOHYmoyuhz9D VDDCopZJgmNbs4PQQwB44lZZf6x1U70dmCK/SD1zmS8zo+zj56G2u12Pf R4eWDmZh6SOCXSI7WJsOxzTLzhgjzHAoXnmaten752et3PIgFdhGe3FNk 2ndSh9ccRsYS0TTx6DzNX9CYa0slr/8z0KP+EpKhvRhckEZFk4XQjIoCM Q==; X-CSE-ConnectionGUID: dSwsIgv6SRKgEehUNX4d5A== X-CSE-MsgGUID: 5fXuWngkQO6MXO/A/pEsYQ== X-IronPort-AV: E=McAfee;i="6700,10204,11269"; a="43597607" X-IronPort-AV: E=Sophos;i="6.12,189,1728975600"; d="scan'208";a="43597607" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Nov 2024 08:15:57 -0800 X-CSE-ConnectionGUID: WK6Tvta8S7Ox6lohOTRQ7Q== X-CSE-MsgGUID: TJ2XPXdCTf6GBiC9ZWt3bw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="97042461" Received: from mlehtone-mobl.ger.corp.intel.com (HELO localhost.localdomain) ([10.245.244.148]) by ORVIESA003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Nov 2024 08:15:54 -0800 From: Patryk Wlazlyn To: x86@kernel.org Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, rafael.j.wysocki@intel.com, peterz@infradead.org, dave.hansen@linux.intel.com, gautham.shenoy@amd.com, tglx@linutronix.de, len.brown@intel.com, artem.bityutskiy@linux.intel.com, patryk.wlazlyn@linux.intel.com Subject: [PATCH v6 3/4] intel_idle: Provide the default enter_dead() handler Date: Wed, 27 Nov 2024 17:15:17 +0100 Message-ID: <20241127161518.432616-4-patryk.wlazlyn@linux.intel.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241127161518.432616-1-patryk.wlazlyn@linux.intel.com> References: <20241127161518.432616-1-patryk.wlazlyn@linux.intel.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Recent Intel platforms require idle driver to provide information about the MWAIT hint used to enter the deepest idle state in the play_dead code. Provide the default enter_dead() handler for all of the platforms and allow overwriting with a custom handler for each platform if needed. Signed-off-by: Patryk Wlazlyn --- drivers/idle/intel_idle.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index ac4d8faa3886..291efa733356 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -56,6 +56,7 @@ #include #include #include +#include #define INTEL_IDLE_VERSION "0.5.1" @@ -227,6 +228,16 @@ static __cpuidle int intel_idle_s2idle(struct cpuidle_device *dev, return 0; } +static __cpuidle void intel_idle_enter_dead(struct cpuidle_device *dev, + int index) +{ + struct cpuidle_driver *drv = cpuidle_get_cpu_driver(dev); + struct cpuidle_state *state = &drv->states[index]; + unsigned long eax = flg2MWAIT(state->flags); + + mwait_play_dead_with_hint(eax); +} + /* * States are indexed by the cstate number, * which is also the index into the MWAIT hint array. @@ -1798,6 +1809,7 @@ static void __init intel_idle_init_cstates_acpi(struct cpuidle_driver *drv) state->flags |= CPUIDLE_FLAG_TIMER_STOP; state->enter = intel_idle; + state->enter_dead = intel_idle_enter_dead; state->enter_s2idle = intel_idle_s2idle; } } @@ -2143,10 +2155,12 @@ static void __init intel_idle_init_cstates_icpu(struct cpuidle_driver *drv) if (intel_idle_max_cstate_reached(cstate)) break; - if (!cpuidle_state_table[cstate].enter && - !cpuidle_state_table[cstate].enter_s2idle) + if (!cpuidle_state_table[cstate].enter) break; + if (!cpuidle_state_table[cstate].enter_dead) + cpuidle_state_table[cstate].enter_dead = intel_idle_enter_dead; + /* If marked as unusable, skip this state. */ if (cpuidle_state_table[cstate].flags & CPUIDLE_FLAG_UNUSABLE) { pr_debug("state %s is disabled\n",