From patchwork Tue Jun 21 09:31:14 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Gonzalez X-Patchwork-Id: 9190065 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 145656075E for ; Tue, 21 Jun 2016 09:36:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0352C27FAC for ; Tue, 21 Jun 2016 09:36:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EB1CC280B0; Tue, 21 Jun 2016 09:36:02 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D4DE727FAC for ; Tue, 21 Jun 2016 09:36:01 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bFI4v-0001Rk-Mc; Tue, 21 Jun 2016 09:34:41 +0000 Received: from a.mx.sdesigns.eu ([78.31.43.6]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bFI4X-0001HA-6F for linux-arm-kernel@lists.infradead.org; Tue, 21 Jun 2016 09:34:18 +0000 Received: from [172.27.0.114] (summerrain.france.sdesigns.com [172.27.0.114]) by hibou.france.sdesigns.com (Postfix) with ESMTP id CCB531C11C2; Tue, 21 Jun 2016 11:33:49 +0200 (CEST) Subject: [PATCH v2 1/2] ARM: tango: add HOTPLUG_CPU support To: arm-soc References: <576908D6.8090000@sigmadesigns.com> From: Marc Gonzalez Message-ID: <57690962.8050701@sigmadesigns.com> Date: Tue, 21 Jun 2016 11:31:14 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:43.0) Gecko/20100101 Firefox/43.0 SeaMonkey/2.40 MIME-Version: 1.0 In-Reply-To: <576908D6.8090000@sigmadesigns.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160621_023417_499359_37178738 X-CRM114-Status: UNSURE ( 9.39 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sebastian Frias , Linux ARM , Mason Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP cpu_die() and cpu_kill() are implemented in firmware. Signed-off-by: Marc Gonzalez --- arch/arm/mach-tango/platsmp.c | 17 +++++++++++++++++ arch/arm/mach-tango/smc.h | 4 +++- 2 files changed, 20 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-tango/platsmp.c b/arch/arm/mach-tango/platsmp.c index a21f55e000d2..ff495f6b6f40 100644 --- a/arch/arm/mach-tango/platsmp.c +++ b/arch/arm/mach-tango/platsmp.c @@ -9,8 +9,25 @@ static int tango_boot_secondary(unsigned int cpu, struct task_struct *idle) return 0; } +#ifdef CONFIG_HOTPLUG_CPU +static int tango_cpu_kill(unsigned int cpu) +{ + return tango_aux_core_kill(cpu); +} + +static void tango_cpu_die(unsigned int cpu) +{ + tango_aux_core_die(cpu); +} +#else +#define tango_cpu_kill NULL +#define tango_cpu_die NULL +#endif + static const struct smp_operations tango_smp_ops __initconst = { .smp_boot_secondary = tango_boot_secondary, + .cpu_kill = tango_cpu_kill, + .cpu_die = tango_cpu_die, }; CPU_METHOD_OF_DECLARE(tango4_smp, "sigma,tango4-smp", &tango_smp_ops); diff --git a/arch/arm/mach-tango/smc.h b/arch/arm/mach-tango/smc.h index 7a4af35cc390..3d31f984f44c 100644 --- a/arch/arm/mach-tango/smc.h +++ b/arch/arm/mach-tango/smc.h @@ -2,4 +2,6 @@ extern int tango_smc(unsigned int val, unsigned int service); #define tango_set_l2_control(val) tango_smc(val, 0x102) #define tango_start_aux_core(val) tango_smc(val, 0x104) -#define tango_set_aux_boot_addr(val) tango_smc((unsigned int)val, 0x105) +#define tango_set_aux_boot_addr(val) tango_smc(val, 0x105) +#define tango_aux_core_die(val) tango_smc(val, 0x121) +#define tango_aux_core_kill(val) tango_smc(val, 0x122)