From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AB8JxZqd9TmZVPTir5uaNjJ7y+jGHdMrgGmjvKU3rrq4IvuBVI0ZClyivNEk2ejim0dT7Apf2YHa ARC-Seal: i=1; a=rsa-sha256; t=1525826593; cv=none; d=google.com; s=arc-20160816; b=nOBoFPTWhVIiyJpvAlG8IyU9xCRhXZAHF7gzi9CVl2FN1RIzxsH9pQo/ofp9KDhQYJ +bM9T/Ta9M9BSttQLU2GLejYJ7DFE3vdiqKKxMvPjSC95J5LlZdsdFLAEhkpEtSzXVcZ qafJsZtLbj0OhgVipW/1itsI0hY6J1JLOjZRuPAIJ8f9VXdqjXqBdinrUHOTLc92kBKA 8xAcWon1khUwrU+OVqOUsQZlF9mYgW9PN5UxG420QUJtiGp2gy55vReyolPhZ9ocqIc4 gEAvEWPxxb97iNQX13uSZ7NtDSFPQbhZrTEFF5Lu7O12TuTBZYECNirN+BYX7idNI0n+ mYrw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:content-transfer-encoding:message-id:references :in-reply-to:date:subject:cc:to:from:arc-authentication-results; bh=Kj2GMDwC03rO5VLAOeX1gCOS/AWy1bU6GhUAM5GKC5Y=; b=FarUoDlbjeuULK/oHizTbDvstNk6NPsjD5uQH8ckevZBwgM4KIEwF5F+yIA+D6C9GK MMfzrOXVb+MMmosPC1TpU02jnAU3LjnLcnC6DaP/GUIZN4UxOAHVvuDPJK9AtyomA4oT /19vcjmlZWWg7woXPf5gPvmEdYaK7gQ5mAlrUEXvUVGfFMgnsRYSsrA09MsbyGGD3H7R ksNCasQG84uixdKD8pqogi2XYjR9g4XG+cMYHTxYePhsT5DiT4xi/ZzdLIzO0iKfvFGy xUVOZK+20uDf63CoA8spVD7bwZKp5v84lqegoim0vuRX5ts8yFHPjT55MZjaTr1Kuq+D USoA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of alastair@au1.ibm.com designates 148.163.156.1 as permitted sender) smtp.mailfrom=alastair@au1.ibm.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=ibm.com Authentication-Results: mx.google.com; spf=pass (google.com: domain of alastair@au1.ibm.com designates 148.163.156.1 as permitted sender) smtp.mailfrom=alastair@au1.ibm.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=ibm.com From: "Alastair D'Silva" To: linuxppc-dev@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, mikey@neuling.org, vaibhav@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com, malat@debian.org, felix@linux.vnet.ibm.com, pombredanne@nexb.com, sukadev@linux.vnet.ibm.com, npiggin@gmail.com, gregkh@linuxfoundation.org, arnd@arndb.de, andrew.donnellan@au1.ibm.com, fbarrat@linux.vnet.ibm.com, corbet@lwn.net, "Alastair D'Silva" Subject: [PATCH v3 1/7] powerpc: Add TIDR CPU feature for POWER9 Date: Wed, 9 May 2018 10:42:06 +1000 X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180509004212.4506-1-alastair@au1.ibm.com> References: <20180417020950.21446-1-alastair@au1.ibm.com> <20180509004212.4506-1-alastair@au1.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18050900-0044-0000-0000-000005508D35 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18050900-0045-0000-0000-00002891D181 Message-Id: <20180509004212.4506-2-alastair@au1.ibm.com> Content-Type: text/plain Content-Transfer-Encoding: 8bit MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-05-08_08:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1805090005 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1599945146111119412?= X-GMAIL-MSGID: =?utf-8?q?1599945146111119412?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Alastair D'Silva This patch adds a CPU feature bit to show whether the CPU has the TIDR register available, enabling as_notify/wait in userspace. Signed-off-by: Alastair D'Silva --- arch/powerpc/include/asm/cputable.h | 3 ++- arch/powerpc/kernel/dt_cpu_ftrs.c | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h index 4e332f3531c5..54c4cbbe57b4 100644 --- a/arch/powerpc/include/asm/cputable.h +++ b/arch/powerpc/include/asm/cputable.h @@ -215,6 +215,7 @@ static inline void cpu_feature_keys_init(void) { } #define CPU_FTR_P9_TM_HV_ASSIST LONG_ASM_CONST(0x0000100000000000) #define CPU_FTR_P9_TM_XER_SO_BUG LONG_ASM_CONST(0x0000200000000000) #define CPU_FTR_P9_TLBIE_BUG LONG_ASM_CONST(0x0000400000000000) +#define CPU_FTR_P9_TIDR LONG_ASM_CONST(0x0000800000000000) #ifndef __ASSEMBLY__ @@ -462,7 +463,7 @@ static inline void cpu_feature_keys_init(void) { } CPU_FTR_CFAR | CPU_FTR_HVMODE | CPU_FTR_VMX_COPY | \ CPU_FTR_DBELL | CPU_FTR_HAS_PPR | CPU_FTR_ARCH_207S | \ CPU_FTR_TM_COMP | CPU_FTR_ARCH_300 | CPU_FTR_PKEY | \ - CPU_FTR_P9_TLBIE_BUG) + CPU_FTR_P9_TLBIE_BUG | CPU_FTR_P9_TIDR) #define CPU_FTRS_POWER9_DD1 ((CPU_FTRS_POWER9 | CPU_FTR_POWER9_DD1) & \ (~CPU_FTR_SAO)) #define CPU_FTRS_POWER9_DD2_0 CPU_FTRS_POWER9 diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c index 11a3a4fed3fb..10f8b7f55637 100644 --- a/arch/powerpc/kernel/dt_cpu_ftrs.c +++ b/arch/powerpc/kernel/dt_cpu_ftrs.c @@ -722,6 +722,7 @@ static __init void cpufeatures_cpu_quirks(void) if ((version & 0xffff0000) == 0x004e0000) { cur_cpu_spec->cpu_features &= ~(CPU_FTR_DAWR); cur_cpu_spec->cpu_features |= CPU_FTR_P9_TLBIE_BUG; + cur_cpu_spec->cpu_features |= CPU_FTR_P9_TIDR; } } -- 2.14.3