From patchwork Thu Jan 24 22:11:06 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stuart Yoder X-Patchwork-Id: 215501 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id DA98A2C0085 for ; Fri, 25 Jan 2013 09:12:23 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755439Ab3AXWMW (ORCPT ); Thu, 24 Jan 2013 17:12:22 -0500 Received: from va3ehsobe006.messaging.microsoft.com ([216.32.180.16]:8093 "EHLO va3outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754597Ab3AXWMW (ORCPT ); Thu, 24 Jan 2013 17:12:22 -0500 Received: from mail92-va3-R.bigfish.com (10.7.14.253) by VA3EHSOBE004.bigfish.com (10.7.40.24) with Microsoft SMTP Server id 14.1.225.23; Thu, 24 Jan 2013 22:12:20 +0000 Received: from mail92-va3 (localhost [127.0.0.1]) by mail92-va3-R.bigfish.com (Postfix) with ESMTP id E9080C012A; Thu, 24 Jan 2013 22:12:20 +0000 (UTC) X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPV:NLI; H:mail.freescale.net; RD:none; EFVD:NLI X-SpamScore: 0 X-BigFish: VS0(zzzz1ee6h1de0h1202h1e76h1d1ah1d2ahzz8275bhz2dh2a8h668h839hd24he5bhf0ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1155h) Received: from mail92-va3 (localhost.localdomain [127.0.0.1]) by mail92-va3 (MessageSwitch) id 135906548625628_20294; Thu, 24 Jan 2013 22:11:26 +0000 (UTC) Received: from VA3EHSMHS019.bigfish.com (unknown [10.7.14.242]) by mail92-va3.bigfish.com (Postfix) with ESMTP id 1260610006C; Thu, 24 Jan 2013 22:11:11 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by VA3EHSMHS019.bigfish.com (10.7.99.29) with Microsoft SMTP Server (TLS) id 14.1.225.23; Thu, 24 Jan 2013 22:11:10 +0000 Received: from az84smr01.freescale.net (10.64.34.197) by 039-SN1MMR1-004.039d.mgd.msft.net (10.84.1.14) with Microsoft SMTP Server (TLS) id 14.2.318.3; Thu, 24 Jan 2013 22:11:10 +0000 Received: from right.am.freescale.net (right.am.freescale.net [10.82.176.228]) by az84smr01.freescale.net (8.14.3/8.14.0) with ESMTP id r0OMB6PR010844; Thu, 24 Jan 2013 15:11:09 -0700 From: Stuart Yoder To: CC: , , , , Stuart Yoder Subject: [PATCH][v3] KVM: PPC: add paravirt idle loop for 64-bit book E Date: Thu, 24 Jan 2013 16:11:06 -0600 Message-ID: <1359065466-27355-1-git-send-email-stuart.yoder@freescale.com> X-Mailer: git-send-email 1.7.9.7 MIME-Version: 1.0 X-OriginatorOrg: freescale.com Sender: kvm-ppc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org From: Stuart Yoder Signed-off-by: Stuart Yoder --- -v3 -whitespace cleanup, deleted stray comma, added comment arch/powerpc/kernel/epapr_hcalls.S | 2 ++ arch/powerpc/kernel/idle_book3e.S | 32 ++++++++++++++++++++++++++++++-- 2 files changed, 32 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kernel/epapr_hcalls.S b/arch/powerpc/kernel/epapr_hcalls.S index 62c0dc2..9f1ebf7 100644 --- a/arch/powerpc/kernel/epapr_hcalls.S +++ b/arch/powerpc/kernel/epapr_hcalls.S @@ -17,6 +17,7 @@ #include #include +#ifndef CONFIG_PPC64 /* epapr_ev_idle() was derived from e500_idle() */ _GLOBAL(epapr_ev_idle) CURRENT_THREAD_INFO(r3, r1) @@ -42,6 +43,7 @@ epapr_ev_idle_start: * _TLF_NAPPING. */ b idle_loop +#endif /* Hypercall entry point. Will be patched with device tree instructions. */ .global epapr_hypercall_start diff --git a/arch/powerpc/kernel/idle_book3e.S b/arch/powerpc/kernel/idle_book3e.S index 4c7cb400..bfb73cc 100644 --- a/arch/powerpc/kernel/idle_book3e.S +++ b/arch/powerpc/kernel/idle_book3e.S @@ -16,11 +16,13 @@ #include #include #include +#include /* 64-bit version only for now */ #ifdef CONFIG_PPC64 -_GLOBAL(book3e_idle) +.macro BOOK3E_IDLE name loop +_GLOBAL(\name) /* Save LR for later */ mflr r0 std r0,16(r1) @@ -67,7 +69,33 @@ _GLOBAL(book3e_idle) /* We can now re-enable hard interrupts and go to sleep */ wrteei 1 -1: PPC_WAIT(0) + \loop + +.endm + +.macro BOOK3E_IDLE_LOOP +1: + PPC_WAIT(0) b 1b +.endm + +/* epapr_ev_idle_start below is patched with the proper hcall + opcodes during kernel initialization */ +.macro EPAPR_EV_IDLE_LOOP +idle_loop: + LOAD_REG_IMMEDIATE(r11, EV_HCALL_TOKEN(EV_IDLE)) + +.global epapr_ev_idle_start +epapr_ev_idle_start: + li r3, -1 + nop + nop + nop + b idle_loop +.endm + +BOOK3E_IDLE epapr_ev_idle EPAPR_EV_IDLE_LOOP + +BOOK3E_IDLE book3e_idle BOOK3E_IDLE_LOOP #endif /* CONFIG_PPC64 */