From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AB8JxZoqSPcIMyghan+Wm93eF94oCn21vrDbYv4YOC/2M5oE2uCRN97/RToN/xY4iY7d2JbAP4KD ARC-Seal: i=1; a=rsa-sha256; t=1525713604; cv=none; d=google.com; s=arc-20160816; b=F5/ScflC58+nLE5yYzHZ6OOMwqYSr1MltA7XMgigR907+Q1WINolVMkFalQFzfhoOB PJhK9M4Y78X86OgZWAV0vQrOFjnKyfL4fS990HgOcCRmm/CnFLCvl8kMn4y+uZ1yw7TG ku9Nnma69EoF3Hk78LoF8kBEiZLg9dOIo7e+sX3Ykop2skb8L4nupfLR24Ji3azsz0xH cGROgb9g02UBuRZjI6iST8Nlxt4uXxjcQq7xhnNChImMSNUwQd2gWalypbgpN1UXu2Ip fHx4cszZKGwmNQULvhZ3TOhyIkeXIZ8vbR1qKmFWnRCETguPKN9Bv79NjUGe37ILR1J7 nJvA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=message-id:content-transfer-encoding:content-language:in-reply-to :mime-version:user-agent:date:from:references:cc:to:subject :arc-authentication-results; bh=c7D2eg2IGbfK8dR/9w5updnMQhkx5dpMxghed3+XGf8=; b=NI+HtEswdUF8scGIMXuAI1JQzPynUObzns/oWfiz+PTlX/pix3uVHYUhwmBcHqh1he wLwc98quvotzDc0hlxvD9TB4RMkmI0z86Ykt4hSoEyLEQjcYo+BqCPUb7pS2SqBxANJr 4gLLA7umff1xXQw35huHKPGeQ8Ps0VjGf/UfcLAZRHgvOJHd7G1LReEDRLyGBuVkkBPE eEdVv8gw4Q0fjEVtEqmAV6ifIy16tePyphT4MeuzTXKEz/WCiH125VysnHKIS/tO+Nzh fPjS4xf2jK2TfqdZZoUOfMELs5ZmBEh/cta26OsTENFmOqRVVoQH0lVV969yKLvGNdj7 jpUw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of fbarrat@linux.ibm.com designates 148.163.156.1 as permitted sender) smtp.mailfrom=fbarrat@linux.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 fbarrat@linux.ibm.com designates 148.163.156.1 as permitted sender) smtp.mailfrom=fbarrat@linux.ibm.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=ibm.com Subject: Re: [PATCH v2 2/7] powerpc: Use TIDR CPU feature to control TIDR allocation To: "Alastair D'Silva" , 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" References: <20180417020950.21446-1-alastair@au1.ibm.com> <20180418010810.30937-1-alastair@au1.ibm.com> <20180418010810.30937-3-alastair@au1.ibm.com> From: Frederic Barrat Date: Mon, 7 May 2018 19:19:53 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <20180418010810.30937-3-alastair@au1.ibm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: fr Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 18050717-0020-0000-0000-0000041A0B20 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18050717-0021-0000-0000-000042AF3FB8 Message-Id: <772d6e5d-54c2-0512-b8e6-21d12d8c44cc@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-05-07_08:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 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-1805070174 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1597957550458920157?= X-GMAIL-MSGID: =?utf-8?q?1599826668072549214?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: Le 18/04/2018 à 03:08, Alastair D'Silva a écrit : > From: Alastair D'Silva > > Switch the use of TIDR on it's CPU feature, rather than assuming it > is available based on architecture. > > Signed-off-by: Alastair D'Silva > --- Reviewed-by: Frederic Barrat > arch/powerpc/kernel/process.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c > index 1237f13fed51..3b00da47699b 100644 > --- a/arch/powerpc/kernel/process.c > +++ b/arch/powerpc/kernel/process.c > @@ -1154,7 +1154,7 @@ static inline void restore_sprs(struct thread_struct *old_thread, > mtspr(SPRN_TAR, new_thread->tar); > } > > - if (cpu_has_feature(CPU_FTR_ARCH_300) && > + if (cpu_has_feature(CPU_FTR_P9_TIDR) && > old_thread->tidr != new_thread->tidr) > mtspr(SPRN_TIDR, new_thread->tidr); > #endif > @@ -1570,7 +1570,7 @@ void clear_thread_tidr(struct task_struct *t) > if (!t->thread.tidr) > return; > > - if (!cpu_has_feature(CPU_FTR_ARCH_300)) { > + if (!cpu_has_feature(CPU_FTR_P9_TIDR)) { > WARN_ON_ONCE(1); > return; > } > @@ -1593,7 +1593,7 @@ int set_thread_tidr(struct task_struct *t) > { > int rc; > > - if (!cpu_has_feature(CPU_FTR_ARCH_300)) > + if (!cpu_has_feature(CPU_FTR_P9_TIDR)) > return -EINVAL; > > if (t != current) >