Message ID | 20200319035609.158654-3-aneesh.kumar@linux.ibm.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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Thu, 19 Mar 2020 03:56:31 +0000 (UTC) Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 02J3XwF4074125; Wed, 18 Mar 2020 23:56:28 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0b-001b2d01.pphosted.com with ESMTP id 2yu7fsjtmk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 18 Mar 2020 23:56:28 -0400 Received: from m0098414.ppops.net (m0098414.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 02J3Y8Vj074895; Wed, 18 Mar 2020 23:56:27 -0400 Received: from ppma02dal.us.ibm.com (a.bd.3ea9.ip4.static.sl-reverse.com [169.62.189.10]) by mx0b-001b2d01.pphosted.com with ESMTP id 2yu7fsjtme-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 18 Mar 2020 23:56:27 -0400 Received: from pps.filterd (ppma02dal.us.ibm.com [127.0.0.1]) by ppma02dal.us.ibm.com (8.16.0.27/8.16.0.27) with SMTP id 02J3rPhG029121; Thu, 19 Mar 2020 03:56:27 GMT Received: from b01cxnp22034.gho.pok.ibm.com (b01cxnp22034.gho.pok.ibm.com [9.57.198.24]) by ppma02dal.us.ibm.com with ESMTP id 2yrpw6y0d4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 19 Mar 2020 03:56:27 +0000 Received: from b01ledav004.gho.pok.ibm.com (b01ledav004.gho.pok.ibm.com [9.57.199.109]) by b01cxnp22034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 02J3uQvA40174004 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 19 Mar 2020 03:56:26 GMT Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2243A112064; Thu, 19 Mar 2020 03:56:26 +0000 (GMT) Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 23565112063; Thu, 19 Mar 2020 03:56:22 +0000 (GMT) Received: from skywalker.ibmuc.com (unknown [9.199.34.213]) by b01ledav004.gho.pok.ibm.com (Postfix) with ESMTP; Thu, 19 Mar 2020 03:56:21 +0000 (GMT) From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com> To: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au, linux-mm@kvack.org, linux-kernel@vger.kernel.org, kvm-ppc@vger.kernel.org Cc: npiggin@gmail.com, paulus@ozlabs.org, leonardo@linux.ibm.com, kirill@shutemov.name, "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>, Ram Pai <linuxram@linux.ibm.com>, Sandipan Das <sandipan@linux.ibm.com> Subject: [PATCH v2 02/22] powerpc/pkeys: Check vma before returning key fault error to the user Date: Thu, 19 Mar 2020 09:25:49 +0530 Message-Id: <20200319035609.158654-3-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200319035609.158654-1-aneesh.kumar@linux.ibm.com> References: <20200319035609.158654-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.645 definitions=2020-03-18_10:2020-03-18,2020-03-18 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxscore=0 mlxlogscore=999 suspectscore=2 bulkscore=0 phishscore=0 malwarescore=0 lowpriorityscore=0 adultscore=0 spamscore=0 priorityscore=1501 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003190013 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: <linux-mm.kvack.org> |
Series |
Avoid IPI while updating page table entries.
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expand
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diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c index ab99ffa7d946..2515430ae515 100644 --- a/arch/powerpc/mm/fault.c +++ b/arch/powerpc/mm/fault.c @@ -319,14 +319,6 @@ static bool bad_stack_expansion(struct pt_regs *regs, unsigned long address, static bool access_pkey_error(bool is_write, bool is_exec, bool is_pkey, struct vm_area_struct *vma) { - /* - * Read or write was blocked by protection keys. This is - * always an unconditional error and can never result in - * a follow-up action to resolve the fault, like a COW. - */ - if (is_pkey) - return true; - /* * Make sure to check the VMA so that we do not perform * faults just to hit a pkey fault as soon as we fill in a