From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753379AbcFBMjU (ORCPT ); Thu, 2 Jun 2016 08:39:20 -0400 Received: from e19.ny.us.ibm.com ([129.33.205.209]:41425 "EHLO e19.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752017AbcFBMjS (ORCPT ); Thu, 2 Jun 2016 08:39:18 -0400 X-IBM-Helo: d01dlp01.pok.ibm.com X-IBM-MailFrom: shreyas@linux.vnet.ibm.com X-IBM-RcptTo: mpe@ellerman.id.au;linuxppc-dev@lists.ozlabs.org;mikey@neuling.org;paulus@ozlabs.org;linux-kernel@vger.kernel.org From: "Shreyas B. Prabhu" To: mpe@ellerman.id.au Cc: paulus@ozlabs.org, mikey@neuling.org, ego@linux.vnet.ibm.com, maddy@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, "Shreyas B. Prabhu" Subject: [PATCH v5 06/11] powerpc/powernv: abstraction for saving SPRs before entering deep idle states Date: Thu, 2 Jun 2016 07:38:56 -0500 Message-Id: <1464871141-11568-7-git-send-email-shreyas@linux.vnet.ibm.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1464871141-11568-1-git-send-email-shreyas@linux.vnet.ibm.com> References: <1464871141-11568-1-git-send-email-shreyas@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16060212-0057-0000-0000-0000047DF580 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Create a function for saving SPRs before entering deep idle states. This function can be reused for POWER9 deep idle states. Reviewed-by: Gautham R. Shenoy Signed-off-by: Shreyas B. Prabhu --- - No changes from v3 Changes in v3: ============= - Newly added in v3 arch/powerpc/kernel/idle_power_common.S | 54 +++++++++++++++++++-------------- 1 file changed, 32 insertions(+), 22 deletions(-) diff --git a/arch/powerpc/kernel/idle_power_common.S b/arch/powerpc/kernel/idle_power_common.S index a8397e3..2f909a1 100644 --- a/arch/powerpc/kernel/idle_power_common.S +++ b/arch/powerpc/kernel/idle_power_common.S @@ -53,6 +53,36 @@ .text /* + * Used by threads before entering deep idle states. Saves SPRs + * in interrupt stack frame + */ +save_sprs_to_stack: + /* + * Note all register i.e per-core, per-subcore or per-thread is saved + * here since any thread in the core might wake up first + */ + mfspr r3,SPRN_SDR1 + std r3,_SDR1(r1) + mfspr r3,SPRN_RPR + std r3,_RPR(r1) + mfspr r3,SPRN_SPURR + std r3,_SPURR(r1) + mfspr r3,SPRN_PURR + std r3,_PURR(r1) + mfspr r3,SPRN_TSCR + std r3,_TSCR(r1) + mfspr r3,SPRN_DSCR + std r3,_DSCR(r1) + mfspr r3,SPRN_AMOR + std r3,_AMOR(r1) + mfspr r3,SPRN_WORT + std r3,_WORT(r1) + mfspr r3,SPRN_WORC + std r3,_WORC(r1) + + blr + +/* * Used by threads when the lock bit of core_idle_state is set. * Threads will spin in HMT_LOW until the lock bit is cleared. * r14 - pointer to core_idle_state @@ -209,28 +239,8 @@ fastsleep_workaround_at_entry: b common_enter enter_winkle: - /* - * Note all register i.e per-core, per-subcore or per-thread is saved - * here since any thread in the core might wake up first - */ - mfspr r3,SPRN_SDR1 - std r3,_SDR1(r1) - mfspr r3,SPRN_RPR - std r3,_RPR(r1) - mfspr r3,SPRN_SPURR - std r3,_SPURR(r1) - mfspr r3,SPRN_PURR - std r3,_PURR(r1) - mfspr r3,SPRN_TSCR - std r3,_TSCR(r1) - mfspr r3,SPRN_DSCR - std r3,_DSCR(r1) - mfspr r3,SPRN_AMOR - std r3,_AMOR(r1) - mfspr r3,SPRN_WORT - std r3,_WORT(r1) - mfspr r3,SPRN_WORC - std r3,_WORC(r1) + bl save_sprs_to_stack + IDLE_STATE_ENTER_SEQ(PPC_WINKLE) _GLOBAL(power7_idle) -- 2.1.4