From patchwork Tue Jan 22 23:54:43 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stuart Yoder X-Patchwork-Id: 214694 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from ozlabs.org (localhost [IPv6:::1]) by ozlabs.org (Postfix) with ESMTP id 0A4772C00A1 for ; Wed, 23 Jan 2013 10:55:20 +1100 (EST) Received: by ozlabs.org (Postfix) id C459C2C0080; Wed, 23 Jan 2013 10:54:53 +1100 (EST) Delivered-To: linuxppc-dev@ozlabs.org Received: from tx2outboundpool.messaging.microsoft.com (tx2ehsobe003.messaging.microsoft.com [65.55.88.13]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (Client CN "mail.global.frontbridge.com", Issuer "Microsoft Secure Server Authority" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 5D1B52C007B for ; Wed, 23 Jan 2013 10:54:53 +1100 (EST) Received: from mail201-tx2-R.bigfish.com (10.9.14.238) by TX2EHSOBE009.bigfish.com (10.9.40.29) with Microsoft SMTP Server id 14.1.225.23; Tue, 22 Jan 2013 23:54:50 +0000 Received: from mail201-tx2 (localhost [127.0.0.1]) by mail201-tx2-R.bigfish.com (Postfix) with ESMTP id 50171A4011F; Tue, 22 Jan 2013 23:54:50 +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 mail201-tx2 (localhost.localdomain [127.0.0.1]) by mail201-tx2 (MessageSwitch) id 1358898888396787_1319; Tue, 22 Jan 2013 23:54:48 +0000 (UTC) Received: from TX2EHSMHS042.bigfish.com (unknown [10.9.14.236]) by mail201-tx2.bigfish.com (Postfix) with ESMTP id 5D6F840004D; Tue, 22 Jan 2013 23:54:48 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by TX2EHSMHS042.bigfish.com (10.9.99.142) with Microsoft SMTP Server (TLS) id 14.1.225.23; Tue, 22 Jan 2013 23:54:48 +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; Tue, 22 Jan 2013 23:54:47 +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 r0MNshrP007593; Tue, 22 Jan 2013 16:54:43 -0700 From: Stuart Yoder To: , Subject: [PATCH][v2] KVM: PPC: add paravirt idle loop for 64-bit book E Date: Tue, 22 Jan 2013 17:54:43 -0600 Message-ID: <1358898883-16218-1-git-send-email-stuart.yoder@freescale.com> X-Mailer: git-send-email 1.7.9.7 MIME-Version: 1.0 X-OriginatorOrg: freescale.com Cc: linuxppc-dev@ozlabs.org, kvm-ppc@vger.kernel.org, kvm@vger.kernel.org, Stuart Yoder X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Stuart Yoder Signed-off-by: Stuart Yoder --- -v2 -macro'ized loop in idle_book3e.S to avoid code duplication, paravirt loop is now in idle_book3e.S arch/powerpc/kernel/epapr_hcalls.S | 2 ++ arch/powerpc/kernel/idle_book3e.S | 30 ++++++++++++++++++++++++++++-- 2 files changed, 30 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..e1c9acd 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 +69,31 @@ _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 + +.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 */