From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_2 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E9C35C2D0CD for ; Tue, 17 Dec 2019 05:51:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C135621775 for ; Tue, 17 Dec 2019 05:51:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727604AbfLQFv2 (ORCPT ); Tue, 17 Dec 2019 00:51:28 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:29460 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727953AbfLQFv1 (ORCPT ); Tue, 17 Dec 2019 00:51:27 -0500 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id xBH5l4Q5003684; Tue, 17 Dec 2019 00:51:10 -0500 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 2wwe3p6bjw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 17 Dec 2019 00:51:10 -0500 Received: from m0098396.ppops.net (m0098396.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id xBH5mPt1006822; Tue, 17 Dec 2019 00:51:10 -0500 Received: from ppma03wdc.us.ibm.com (ba.79.3fa9.ip4.static.sl-reverse.com [169.63.121.186]) by mx0a-001b2d01.pphosted.com with ESMTP id 2wwe3p6bjh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 17 Dec 2019 00:51:10 -0500 Received: from pps.filterd (ppma03wdc.us.ibm.com [127.0.0.1]) by ppma03wdc.us.ibm.com (8.16.0.27/8.16.0.27) with SMTP id xBH5nstw007646; Tue, 17 Dec 2019 05:51:08 GMT Received: from b01cxnp22036.gho.pok.ibm.com (b01cxnp22036.gho.pok.ibm.com [9.57.198.26]) by ppma03wdc.us.ibm.com with ESMTP id 2wvqc69mgk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 17 Dec 2019 05:51:08 +0000 Received: from b01ledav003.gho.pok.ibm.com (b01ledav003.gho.pok.ibm.com [9.57.199.108]) by b01cxnp22036.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id xBH5p8rU34865530 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 17 Dec 2019 05:51:08 GMT Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 799B6B2066; Tue, 17 Dec 2019 05:51:08 +0000 (GMT) Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BF59AB2065; Tue, 17 Dec 2019 05:51:07 +0000 (GMT) Received: from [9.70.82.143] (unknown [9.70.82.143]) by b01ledav003.gho.pok.ibm.com (Postfix) with ESMTP; Tue, 17 Dec 2019 05:51:07 +0000 (GMT) Subject: [PATCH V3 02/13] powerpc/vas: Define nx_fault_stamp in coprocessor_request_block From: Haren Myneni To: mpe@ellerman.id.au Cc: hch@infradead.org, devicetree@vger.kernel.org, mikey@neuling.org, herbert@gondor.apana.org.au, npiggin@gmail.com, linuxppc-dev@lists.ozlabs.org, sukadev@linux.vnet.ibm.com In-Reply-To: <1576561080.16318.6531.camel@hbabu-laptop> References: <1576561080.16318.6531.camel@hbabu-laptop> Content-Type: text/plain; charset="UTF-8" Date: Mon, 16 Dec 2019 21:49:15 -0800 Message-ID: <1576561755.16318.6533.camel@hbabu-laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2019-12-17_01:2019-12-16,2019-12-16 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 priorityscore=1501 mlxscore=0 mlxlogscore=770 impostorscore=0 phishscore=0 adultscore=0 bulkscore=0 clxscore=1015 suspectscore=1 spamscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-1912170052 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Kernel sets fault address and status in CRB for NX page fault on user space address after processing page fault. User space gets the signal and handles the fault mentioned in CRB by bringing the page in to memory and send NX request again. Signed-off-by: Sukadev Bhattiprolu Signed-off-by: Haren Myneni --- arch/powerpc/include/asm/icswx.h | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/icswx.h b/arch/powerpc/include/asm/icswx.h index 9872f85..b233d1e 100644 --- a/arch/powerpc/include/asm/icswx.h +++ b/arch/powerpc/include/asm/icswx.h @@ -108,6 +108,17 @@ struct data_descriptor_entry { __be64 address; } __packed __aligned(DDE_ALIGN); +/* 4.3.2 NX-stamped Fault CRB */ + +#define NX_STAMP_ALIGN (0x10) + +struct nx_fault_stamp { + __be64 fault_storage_addr; + __be16 reserved; + __u8 flags; + __u8 fault_status; + __be32 pswid; +} __packed __aligned(NX_STAMP_ALIGN); /* Chapter 6.5.2 Coprocessor-Request Block (CRB) */ @@ -135,7 +146,12 @@ struct coprocessor_request_block { struct coprocessor_completion_block ccb; - u8 reserved[48]; + union { + struct nx_fault_stamp nx; + u8 reserved[16]; + } stamp; + + u8 reserved[32]; struct coprocessor_status_block csb; } __packed __aligned(CRB_ALIGN); -- 1.8.3.1