From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AB8JxZqCbT8woBiqeOWTCgXP5ZjbBvvazAp8mFAlLa3DVXNOZjtsdRzt7nppIhu/h+uCdLFUeDtt ARC-Seal: i=1; a=rsa-sha256; t=1525844155; cv=none; d=google.com; s=arc-20160816; b=ZlCDFwbWVTKxh/MPM7dOnt6Pzk4CTV6xHMFdJhGT9O8gh+0gI66pSXr70+NW70m0tb B0MmWJut5T0kIEIIHl+lcdYDd8C9/W7CgathJb2MBRJM5sQU4O7pWykndnZwZWLwRGn8 +nNmSdWZVIX4cfJ91ArThqMGspWFVDgvi09LeiYIZmHYPJZXcGXSX0huSS5TJlZP1u3M OLBEQRav86pdCRbSDirfaPwWHNzPxEY8hNyPFWfi+Zkw2H+GgeYbp1PAIPsD0NLs/1oW j5KhxCZNMRbPwlpj/Gs+aipT2n2S3EMUWuOwyaSSj/fDFxYOHwyeGDycZWQk5DjSuYvz G8fA== 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=ctx9vxRtqXZmOLSZki0jC2MZd1Ys+UhCf7tl744eOv4T2RP/i7seIA5sNixri2t/K8 NHUjG7x3uR3D0hMeSSYS296eA+ZWjR/A+olb/0NuVniu4Z5xX3L+x4SZcpXDJ1V31eig ZtMClGZLe4VvcfWyE4gYOCE0P7TyPKzW+3Tx+lvceUUyrjTmj6UnLhTj77muy1jL8V9E QtzyPI383G6PNegzi4uODnKw+9BkrY+N6NT5uImbAJiTLpUEdb1y3dJv1sT3LZF8MQ2c WwBLpvQz0qUuKpCJTXkab6kL+BEWzweNCRHmOyGmtyFYVia+jtivJOZP18nDzX4iYAIn i1cg== 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 v4 1/7] powerpc: Add TIDR CPU feature for POWER9 Date: Wed, 9 May 2018 15:35:00 +1000 X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180509053506.9754-1-alastair@au1.ibm.com> References: <20180509004212.4506-1-alastair@au1.ibm.com> <20180509053506.9754-1-alastair@au1.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18050905-0044-0000-0000-000005509EA6 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18050905-0045-0000-0000-00002891E432 Message-Id: <20180509053506.9754-2-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=2018-05-09_01:,, 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-1805090056 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1599945146111119412?= X-GMAIL-MSGID: =?utf-8?q?1599963561827267396?= 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