From patchwork Fri Jun 28 08:15:18 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Ellerman X-Patchwork-Id: 255303 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 E89AA2C0C7E for ; Fri, 28 Jun 2013 18:20:37 +1000 (EST) Received: by ozlabs.org (Postfix) id 81CA42C0387; Fri, 28 Jun 2013 18:15:25 +1000 (EST) Delivered-To: linuxppc-dev@ozlabs.org Received: by ozlabs.org (Postfix, from userid 1034) id 738532C0382; Fri, 28 Jun 2013 18:15:25 +1000 (EST) From: Michael Ellerman To: Subject: [PATCH 9/9] powerpc/pseries: Inform the hypervisor we are using EBB regs Date: Fri, 28 Jun 2013 18:15:18 +1000 Message-Id: <1372407319-718-9-git-send-email-michael@ellerman.id.au> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1372407319-718-1-git-send-email-michael@ellerman.id.au> References: <1372407319-718-1-git-send-email-michael@ellerman.id.au> Cc: sukadev@linux.vnet.ibm.com, Paul Mackerras , khandual@linux.vnet.ibm.com 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: , MIME-Version: 1.0 Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" On LPAR systems we need to inform the hypervisor that we are using the EBB registers. We do this by setting a bit in the Virtual Processor Area (VPA) - formerly known as the lppaca. For now we do this always, ie. we do not dynamically enable/disable. Signed-off-by: Michael Ellerman --- arch/powerpc/include/asm/lppaca.h | 3 ++- arch/powerpc/platforms/pseries/lpar.c | 3 +++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/lppaca.h b/arch/powerpc/include/asm/lppaca.h index b1e7f2a..9b12f88 100644 --- a/arch/powerpc/include/asm/lppaca.h +++ b/arch/powerpc/include/asm/lppaca.h @@ -66,7 +66,8 @@ struct lppaca { u8 reserved6[48]; u8 cede_latency_hint; - u8 reserved7[7]; + u8 ebb_regs_in_use; + u8 reserved7[6]; u8 dtl_enable_mask; /* Dispatch Trace Log mask */ u8 donate_dedicated_cpu; /* Donate dedicated CPU cycles */ u8 fpregs_in_use; diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c index fd0f2f2..02d6e21 100644 --- a/arch/powerpc/platforms/pseries/lpar.c +++ b/arch/powerpc/platforms/pseries/lpar.c @@ -71,6 +71,9 @@ void vpa_init(int cpu) if (cpu_has_feature(CPU_FTR_ALTIVEC)) lppaca_of(cpu).vmxregs_in_use = 1; + if (cpu_has_feature(CPU_FTR_ARCH_207S)) + lppaca_of(cpu).ebb_regs_in_use = 1; + addr = __pa(&lppaca_of(cpu)); ret = register_vpa(hwcpu, addr);