Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752670AbcDUNua (ORCPT ); Thu, 21 Apr 2016 09:50:30 -0400 Received: from e33.co.us.ibm.com ([32.97.110.151]:59496 "EHLO e33.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750991AbcDUNu1 (ORCPT ); Thu, 21 Apr 2016 09:50:27 -0400 X-IBM-Helo: d03dlp02.boulder.ibm.com X-IBM-MailFrom: shreyas@linux.vnet.ibm.com X-IBM-RcptTo: linux-kernel@vger.kernel.org;linux-pm@vger.kernel.org From: "Shreyas B. Prabhu" To: mpe@ellerman.id.au Cc: linuxppc-dev@lists.ozlabs.org, paulus@ozlabs.org, linux-kernel@vger.kernel.org, mikey@neuling.org, "Shreyas B. Prabhu" , "Rafael J. Wysocki" , Daniel Lezcano , linux-pm@vger.kernel.org Subject: [PATCH 0/9] powerpc/powernv/cpuidle: Add support for POWER ISA v3 idle states Date: Thu, 21 Apr 2016 19:19:50 +0530 Message-Id: <1461246599-6098-1-git-send-email-shreyas@linux.vnet.ibm.com> X-Mailer: git-send-email 2.4.11 X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16042113-0009-0000-0000-0000218A6DE9 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3579 Lines: 82 POWER ISA v3 defines a new idle processor core mechanism. In summary, a) new instruction named stop is added. This instruction replaces instructions like nap, sleep, rvwinkle. b) new per thread SPR named PSSCR is added which controls the behavior of stop instruction. PSSCR has following key fields Bits 0:3 - Power-Saving Level Status. This field indicates the lowest power-saving state the thread entered since stop instruction was last executed. Bit 42 - Enable State Loss 0 - No state is lost irrespective of other fields 1 - Allows state loss Bits 44:47 - Power-Saving Level Limit This limits the power-saving level that can be entered into. Bits 60:63 - Requested Level Used to specify which power-saving level must be entered on executing stop instruction Stop idle states and their properties like name, latency, target residency, psscr value are exposed via device tree. This patch series adds support for this new mechanism. Patches 1-6 are cleanups and code movement. Patch 7 adds platform specific support for stop and psscr handling. Patch 8 adds cpuidle driver support. Patch 9 makes offlined cpu use stop state. Cc: Rafael J. Wysocki Cc: Daniel Lezcano Cc: linux-pm@vger.kernel.org Cc: Michael Ellerman Cc: Paul Mackerras Cc: Michael Neuling Cc: linuxppc-dev@lists.ozlabs.org Shreyas B. Prabhu (9): powerpc/powernv: Move CHECK_HMI_INTERRUPT to exception-64s header powerpc/kvm: make hypervisor state restore a function powerpc/powernv: Move idle code usable by multiple hardware to common location powerpc/powernv: Make power7_powersave_common more generic powerpc/powernv: Move idle related macros to cpuidle.h powerpc/powernv: set power_save func after the idle states are initialized powerpc/powernv: Add platform support for stop instruction cpuidle/powernv: Add support for POWER ISA v3 idle states powerpc/powernv: Use deepest stop state when cpu is offlined arch/powerpc/include/asm/cpuidle.h | 29 ++++ arch/powerpc/include/asm/cputable.h | 4 +- arch/powerpc/include/asm/exception-64s.h | 18 +++ arch/powerpc/include/asm/kvm_book3s_asm.h | 2 +- arch/powerpc/include/asm/machdep.h | 1 + arch/powerpc/include/asm/opal-api.h | 11 +- arch/powerpc/include/asm/paca.h | 4 + arch/powerpc/include/asm/ppc-opcode.h | 4 + arch/powerpc/include/asm/processor.h | 1 + arch/powerpc/include/asm/reg.h | 11 ++ arch/powerpc/kernel/Makefile | 2 + arch/powerpc/kernel/asm-offsets.c | 4 + arch/powerpc/kernel/exceptions-64s.S | 29 +--- arch/powerpc/kernel/idle_power7.S | 212 +++------------------------- arch/powerpc/kernel/idle_power_common.S | 185 +++++++++++++++++++++++++ arch/powerpc/kernel/idle_power_stop.S | 221 ++++++++++++++++++++++++++++++ arch/powerpc/platforms/Kconfig | 4 + arch/powerpc/platforms/powernv/Kconfig | 1 + arch/powerpc/platforms/powernv/idle.c | 94 +++++++++++-- arch/powerpc/platforms/powernv/powernv.h | 1 + arch/powerpc/platforms/powernv/setup.c | 2 +- arch/powerpc/platforms/powernv/smp.c | 4 +- drivers/cpuidle/cpuidle-powernv.c | 57 +++++++- 23 files changed, 662 insertions(+), 239 deletions(-) create mode 100644 arch/powerpc/kernel/idle_power_common.S create mode 100644 arch/powerpc/kernel/idle_power_stop.S -- 2.1.4