From patchwork Thu Nov 15 04:49:47 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ian Munsie X-Patchwork-Id: 199130 X-Patchwork-Delegate: benh@kernel.crashing.org 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 E45C22C054C for ; Thu, 15 Nov 2012 15:52:14 +1100 (EST) Received: from e23smtp05.au.ibm.com (e23smtp05.au.ibm.com [202.81.31.147]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e23smtp05.au.ibm.com", Issuer "GeoTrust SSL CA" (not verified)) by ozlabs.org (Postfix) with ESMTPS id A8A602C008D for ; Thu, 15 Nov 2012 15:50:06 +1100 (EST) Received: from /spool/local by e23smtp05.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 15 Nov 2012 14:47:53 +1000 Received: from d23relay03.au.ibm.com (202.81.31.245) by e23smtp05.au.ibm.com (202.81.31.211) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Thu, 15 Nov 2012 14:47:51 +1000 Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay03.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id qAF4o0Y255509172 for ; Thu, 15 Nov 2012 15:50:00 +1100 Received: from d23av01.au.ibm.com (loopback [127.0.0.1]) by d23av01.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id qAF4nxXn009817 for ; Thu, 15 Nov 2012 15:49:59 +1100 Received: from ozlabs.au.ibm.com (ozlabs.au.ibm.com [9.190.163.12]) by d23av01.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id qAF4nx7h009811; Thu, 15 Nov 2012 15:49:59 +1100 Received: from delenn.ozlabs.ibm.com (haven.au.ibm.com [9.190.164.82]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 3ED63A0248; Thu, 15 Nov 2012 15:49:59 +1100 (EST) From: "Ian Munsie" To: Benjamin Herrenschmidt Subject: [PATCH 4/7] powerpc: Select either privileged or hypervisor doorbell when sending Date: Thu, 15 Nov 2012 15:49:47 +1100 Message-Id: <1352954990-2858-5-git-send-email-imunsie@au1.ibm.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1352954990-2858-1-git-send-email-imunsie@au1.ibm.com> References: <1352954990-2858-1-git-send-email-imunsie@au1.ibm.com> x-cbid: 12111504-1396-0000-0000-000002263288 Cc: Michael Neuling , linuxppc-dev , Ian Munsie 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" From: Ian Munsie On book3s we have two msgsnd instructions with differing privilege levels. This patch selects the appropriate instruction to use whenever we send a doorbell interrupt. Signed-off-by: Ian Munsie Tested-by: Michael Neuling --- arch/powerpc/include/asm/dbell.h | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/dbell.h b/arch/powerpc/include/asm/dbell.h index 3b33856..5fa6b20 100644 --- a/arch/powerpc/include/asm/dbell.h +++ b/arch/powerpc/include/asm/dbell.h @@ -37,12 +37,25 @@ enum ppc_dbell { #define SPRN_DOORBELL_CPUTAG SPRN_TIR #define PPC_DBELL_TAG_MASK 0x7f +static inline void _ppc_msgsnd(u32 msg) +{ + if (cpu_has_feature(CPU_FTR_HVMODE)) + __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); + else + __asm__ __volatile__ (PPC_MSGSNDP(%0) : : "r" (msg)); +} + #else /* CONFIG_PPC_BOOK3S */ #define PPC_DBELL_MSGTYPE PPC_DBELL #define SPRN_DOORBELL_CPUTAG SPRN_PIR #define PPC_DBELL_TAG_MASK 0x3fff +static inline void _ppc_msgsnd(u32 msg) +{ + __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); +} + #endif /* CONFIG_PPC_BOOK3S */ extern void doorbell_cause_ipi(int cpu, unsigned long data); @@ -54,7 +67,7 @@ static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag) u32 msg = PPC_DBELL_TYPE(type) | (flags & PPC_DBELL_MSG_BRDCAST) | (tag & 0x07ffffff); - __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); + _ppc_msgsnd(msg); } #endif /* _ASM_POWERPC_DBELL_H */