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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 561ADC4BA37 for ; Thu, 27 Feb 2020 02:34:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3314D208E4 for ; Thu, 27 Feb 2020 02:34:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728271AbgB0CeT (ORCPT ); Wed, 26 Feb 2020 21:34:19 -0500 Received: from foss.arm.com ([217.140.110.172]:44794 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728164AbgB0CeS (ORCPT ); Wed, 26 Feb 2020 21:34:18 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id A9D9F1FB; Wed, 26 Feb 2020 18:34:15 -0800 (PST) Received: from [10.163.1.119] (unknown [10.163.1.119]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6D8323F819; Wed, 26 Feb 2020 18:34:06 -0800 (PST) From: Anshuman Khandual Subject: Re: [PATCH V14] mm/debug: Add tests validating architecture page table helpers To: Christophe Leroy , Qian Cai , linux-mm@kvack.org Cc: Andrew Morton , Mike Rapoport , Vineet Gupta , Catalin Marinas , Will Deacon , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , "Kirill A . Shutemov" , Paul Walmsley , Palmer Dabbelt , linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-riscv@lists.infradead.org, x86@kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, James Morse References: <1581909460-19148-1-git-send-email-anshuman.khandual@arm.com> <1582726182.7365.123.camel@lca.pw> <1582726340.7365.124.camel@lca.pw> Message-ID: <52db1e9b-83b3-c41f-ef03-0f43e2159a83@arm.com> Date: Thu, 27 Feb 2020 08:04:05 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 02/26/2020 08:14 PM, Christophe Leroy wrote: > > > Le 26/02/2020 à 15:12, Qian Cai a écrit : >> On Wed, 2020-02-26 at 09:09 -0500, Qian Cai wrote: >>> On Mon, 2020-02-17 at 08:47 +0530, Anshuman Khandual wrote: >>> >>> How useful is this that straightly crash the powerpc? >> >> And then generate warnings on arm64, >> >> [  146.634626][    T1] debug_vm_pgtable: debug_vm_pgtable: Validating >> architecture page table helpers >> [  146.643995][    T1] ------------[ cut here ]------------ >> [  146.649350][    T1] virt_to_phys used for non-linear address: >> (____ptrval____) (start_kernel+0x0/0x580) > > Must be something wrong with the following in debug_vm_pgtable() > >     paddr = __pa(&start_kernel); > > Is there any explaination why start_kernel() is not in linear memory on ARM64 ? Cc: + James Morse This warning gets exposed with DEBUG_VIRTUAL due to __pa() on a kernel symbol i.e 'start_kernel' which might be outside the linear map. This happens due to kernel mapping position randomization with KASLR. Adding James here in case he might like to add more. __pa_symbol() should have been used instead, for accessing the physical address here. On arm64 __pa() does check for linear address with __is_lm_address() and switch accordingly if it is a kernel text symbol. Nevertheless, its much better to use __pa_symbol() here rather than __pa(). Rather than respining the patch once more, will just send a fix replacing this helper __pa() with __pa_symbol() for Andrew to pick up as this patch is already part of linux-next (next-20200226). But can definitely respin if that will be preferred. Thanks Qian for catching this. > > Christophe > From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anshuman Khandual Subject: Re: [PATCH V14] mm/debug: Add tests validating architecture page table helpers Date: Thu, 27 Feb 2020 08:04:05 +0530 Message-ID: <52db1e9b-83b3-c41f-ef03-0f43e2159a83@arm.com> References: <1581909460-19148-1-git-send-email-anshuman.khandual@arm.com> <1582726182.7365.123.camel@lca.pw> <1582726340.7365.124.camel@lca.pw> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Return-path: Received: from foss.arm.com ([217.140.110.172]:44794 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728164AbgB0CeS (ORCPT ); Wed, 26 Feb 2020 21:34:18 -0500 In-Reply-To: Content-Language: en-US Sender: linux-arch-owner@vger.kernel.org List-ID: To: Christophe Leroy , Qian Cai , linux-mm@kvack.org Cc: Andrew Morton , Mike Rapoport , Vineet Gupta , Catalin Marinas , Will Deacon , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , "Kirill A . Shutemov" , Paul Walmsley , Palmer Dabbelt , linux-snps-arc@lists.infradead.org, linux-arm-kern On 02/26/2020 08:14 PM, Christophe Leroy wrote: > > > Le 26/02/2020 à 15:12, Qian Cai a écrit : >> On Wed, 2020-02-26 at 09:09 -0500, Qian Cai wrote: >>> On Mon, 2020-02-17 at 08:47 +0530, Anshuman Khandual wrote: >>> >>> How useful is this that straightly crash the powerpc? >> >> And then generate warnings on arm64, >> >> [  146.634626][    T1] debug_vm_pgtable: debug_vm_pgtable: Validating >> architecture page table helpers >> [  146.643995][    T1] ------------[ cut here ]------------ >> [  146.649350][    T1] virt_to_phys used for non-linear address: >> (____ptrval____) (start_kernel+0x0/0x580) > > Must be something wrong with the following in debug_vm_pgtable() > >     paddr = __pa(&start_kernel); > > Is there any explaination why start_kernel() is not in linear memory on ARM64 ? Cc: + James Morse This warning gets exposed with DEBUG_VIRTUAL due to __pa() on a kernel symbol i.e 'start_kernel' which might be outside the linear map. This happens due to kernel mapping position randomization with KASLR. Adding James here in case he might like to add more. __pa_symbol() should have been used instead, for accessing the physical address here. On arm64 __pa() does check for linear address with __is_lm_address() and switch accordingly if it is a kernel text symbol. Nevertheless, its much better to use __pa_symbol() here rather than __pa(). Rather than respining the patch once more, will just send a fix replacing this helper __pa() with __pa_symbol() for Andrew to pick up as this patch is already part of linux-next (next-20200226). But can definitely respin if that will be preferred. Thanks Qian for catching this. > > Christophe > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Anshuman Khandual Subject: Re: [PATCH V14] mm/debug: Add tests validating architecture page table helpers References: <1581909460-19148-1-git-send-email-anshuman.khandual@arm.com> <1582726182.7365.123.camel@lca.pw> <1582726340.7365.124.camel@lca.pw> Message-ID: <52db1e9b-83b3-c41f-ef03-0f43e2159a83@arm.com> Date: Thu, 27 Feb 2020 08:04:05 +0530 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+rppt=linux.ibm.com@lists.infradead.org To: Christophe Leroy , Qian Cai , linux-mm@kvack.org Cc: Catalin Marinas , Heiko Carstens , Paul Mackerras , "H. Peter Anvin" , linux-riscv@lists.infradead.org, Will Deacon , linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, Michael Ellerman , x86@kernel.org, Mike Rapoport , Christian Borntraeger , Ingo Molnar , Benjamin Herrenschmidt , James Morse , linux-snps-arc@lists.infradead.org, Vasily Gorbik , Borislav Petkov , Paul Walmsley , "Kirill A . Shutemov" , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Vineet Gupta , linux-kernel@vger.kernel.org, Palmer Dabbelt , Andrew Morton , linuxppc-dev@lists.ozlabs.org List-ID: Message-ID: <20200227023405.syp--RKaM34QGhMTJh4v81OKNwtBZaLgZOeis3cy258@z> On 02/26/2020 08:14 PM, Christophe Leroy wrote: > > > Le 26/02/2020 à 15:12, Qian Cai a écrit : >> On Wed, 2020-02-26 at 09:09 -0500, Qian Cai wrote: >>> On Mon, 2020-02-17 at 08:47 +0530, Anshuman Khandual wrote: >>> >>> How useful is this that straightly crash the powerpc? >> >> And then generate warnings on arm64, >> >> [  146.634626][    T1] debug_vm_pgtable: debug_vm_pgtable: Validating >> architecture page table helpers >> [  146.643995][    T1] ------------[ cut here ]------------ >> [  146.649350][    T1] virt_to_phys used for non-linear address: >> (____ptrval____) (start_kernel+0x0/0x580) > > Must be something wrong with the following in debug_vm_pgtable() > >     paddr = __pa(&start_kernel); > > Is there any explaination why start_kernel() is not in linear memory on ARM64 ? Cc: + James Morse This warning gets exposed with DEBUG_VIRTUAL due to __pa() on a kernel symbol i.e 'start_kernel' which might be outside the linear map. This happens due to kernel mapping position randomization with KASLR. Adding James here in case he might like to add more. __pa_symbol() should have been used instead, for accessing the physical address here. On arm64 __pa() does check for linear address with __is_lm_address() and switch accordingly if it is a kernel text symbol. Nevertheless, its much better to use __pa_symbol() here rather than __pa(). Rather than respining the patch once more, will just send a fix replacing this helper __pa() with __pa_symbol() for Andrew to pick up as this patch is already part of linux-next (next-20200226). But can definitely respin if that will be preferred. Thanks Qian for catching this. > > Christophe > 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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 8E59BC4BA37 for ; Thu, 27 Feb 2020 02:36:19 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DDE7B208E4 for ; Thu, 27 Feb 2020 02:36:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DDE7B208E4 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 48ScHM4grXzDqsR for ; Thu, 27 Feb 2020 13:36:15 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=arm.com (client-ip=217.140.110.172; helo=foss.arm.com; envelope-from=anshuman.khandual@arm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=arm.com Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lists.ozlabs.org (Postfix) with ESMTP id 48ScF94tfTzDqWg for ; Thu, 27 Feb 2020 13:34:19 +1100 (AEDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id A9D9F1FB; Wed, 26 Feb 2020 18:34:15 -0800 (PST) Received: from [10.163.1.119] (unknown [10.163.1.119]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6D8323F819; Wed, 26 Feb 2020 18:34:06 -0800 (PST) From: Anshuman Khandual Subject: Re: [PATCH V14] mm/debug: Add tests validating architecture page table helpers To: Christophe Leroy , Qian Cai , linux-mm@kvack.org References: <1581909460-19148-1-git-send-email-anshuman.khandual@arm.com> <1582726182.7365.123.camel@lca.pw> <1582726340.7365.124.camel@lca.pw> Message-ID: <52db1e9b-83b3-c41f-ef03-0f43e2159a83@arm.com> Date: Thu, 27 Feb 2020 08:04:05 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Catalin Marinas , Heiko Carstens , Paul Mackerras , "H. Peter Anvin" , linux-riscv@lists.infradead.org, Will Deacon , linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, x86@kernel.org, Mike Rapoport , Christian Borntraeger , Ingo Molnar , James Morse , linux-snps-arc@lists.infradead.org, Vasily Gorbik , Borislav Petkov , Paul Walmsley , "Kirill A . Shutemov" , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Vineet Gupta , linux-kernel@vger.kernel.org, Palmer Dabbelt , Andrew Morton , linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 02/26/2020 08:14 PM, Christophe Leroy wrote: > > > Le 26/02/2020 à 15:12, Qian Cai a écrit : >> On Wed, 2020-02-26 at 09:09 -0500, Qian Cai wrote: >>> On Mon, 2020-02-17 at 08:47 +0530, Anshuman Khandual wrote: >>> >>> How useful is this that straightly crash the powerpc? >> >> And then generate warnings on arm64, >> >> [  146.634626][    T1] debug_vm_pgtable: debug_vm_pgtable: Validating >> architecture page table helpers >> [  146.643995][    T1] ------------[ cut here ]------------ >> [  146.649350][    T1] virt_to_phys used for non-linear address: >> (____ptrval____) (start_kernel+0x0/0x580) > > Must be something wrong with the following in debug_vm_pgtable() > >     paddr = __pa(&start_kernel); > > Is there any explaination why start_kernel() is not in linear memory on ARM64 ? Cc: + James Morse This warning gets exposed with DEBUG_VIRTUAL due to __pa() on a kernel symbol i.e 'start_kernel' which might be outside the linear map. This happens due to kernel mapping position randomization with KASLR. Adding James here in case he might like to add more. __pa_symbol() should have been used instead, for accessing the physical address here. On arm64 __pa() does check for linear address with __is_lm_address() and switch accordingly if it is a kernel text symbol. Nevertheless, its much better to use __pa_symbol() here rather than __pa(). Rather than respining the patch once more, will just send a fix replacing this helper __pa() with __pa_symbol() for Andrew to pick up as this patch is already part of linux-next (next-20200226). But can definitely respin if that will be preferred. Thanks Qian for catching this. > > Christophe > 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=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 952F8C4BA24 for ; Thu, 27 Feb 2020 02:34:41 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 67636208E4 for ; Thu, 27 Feb 2020 02:34:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="bYAdDvKo" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 67636208E4 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date: Message-ID:References:To:Subject:From:Reply-To:Content-ID:Content-Description :Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=GfLrxswDlSrv3cVG1Yk6GrTanc/TcD17joEKlY7ieWE=; b=bYAdDvKoIEFCul ilxbbflyRvX3ZiGdVmE4uhXnXA5abqNU6BeU6vO4UrM7gzLskEA7bjfPXFIlss3TRg5NSa6Wl5vbi c0MFBIEbPqv9WzquPzZ1AkOPB02M/16AqiGyffb9rUukcgEHYbxZKpxGKjEDGlNbfvabKVqHRwfgb wwAEAEK4k4Tx9MEtsA2ljGA+smfhii3R0x456/yw7TBEMmWy8EsGY8bV8MCYb5Wb2Y7GC/ewcypgk mvUVFukJNUH87JrNdkqWrdguOvMjYz8BJqlInqCrAk9bdNjCyK1Vxjw0/LU3p7Hah9QzRfqeZpMPn 1Zjme1Fg3xdkjiBKqN+A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j790Y-0005Qm-Fu; Thu, 27 Feb 2020 02:34:38 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j790E-0005C4-Lb; Thu, 27 Feb 2020 02:34:20 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id A9D9F1FB; Wed, 26 Feb 2020 18:34:15 -0800 (PST) Received: from [10.163.1.119] (unknown [10.163.1.119]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6D8323F819; Wed, 26 Feb 2020 18:34:06 -0800 (PST) From: Anshuman Khandual Subject: Re: [PATCH V14] mm/debug: Add tests validating architecture page table helpers To: Christophe Leroy , Qian Cai , linux-mm@kvack.org References: <1581909460-19148-1-git-send-email-anshuman.khandual@arm.com> <1582726182.7365.123.camel@lca.pw> <1582726340.7365.124.camel@lca.pw> Message-ID: <52db1e9b-83b3-c41f-ef03-0f43e2159a83@arm.com> Date: Thu, 27 Feb 2020 08:04:05 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200226_183418_750168_0EB2F9C1 X-CRM114-Status: GOOD ( 14.19 ) X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Catalin Marinas , Heiko Carstens , Paul Mackerras , "H. Peter Anvin" , linux-riscv@lists.infradead.org, Will Deacon , linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, Michael Ellerman , x86@kernel.org, Mike Rapoport , Christian Borntraeger , Ingo Molnar , Benjamin Herrenschmidt , James Morse , linux-snps-arc@lists.infradead.org, Vasily Gorbik , Borislav Petkov , Paul Walmsley , "Kirill A . Shutemov" , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Vineet Gupta , linux-kernel@vger.kernel.org, Palmer Dabbelt , Andrew Morton , linuxppc-dev@lists.ozlabs.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org T24gMDIvMjYvMjAyMCAwODoxNCBQTSwgQ2hyaXN0b3BoZSBMZXJveSB3cm90ZToKPiAKPiAKPiBM ZSAyNi8wMi8yMDIwIMOgIDE1OjEyLCBRaWFuIENhaSBhIMOpY3JpdMKgOgo+PiBPbiBXZWQsIDIw MjAtMDItMjYgYXQgMDk6MDkgLTA1MDAsIFFpYW4gQ2FpIHdyb3RlOgo+Pj4gT24gTW9uLCAyMDIw LTAyLTE3IGF0IDA4OjQ3ICswNTMwLCBBbnNodW1hbiBLaGFuZHVhbCB3cm90ZToKPj4+Cj4+PiBI b3cgdXNlZnVsIGlzIHRoaXMgdGhhdCBzdHJhaWdodGx5IGNyYXNoIHRoZSBwb3dlcnBjPwo+Pgo+ PiBBbmQgdGhlbiBnZW5lcmF0ZSB3YXJuaW5ncyBvbiBhcm02NCwKPj4KPj4gW8KgwqAxNDYuNjM0 NjI2XVvCoMKgwqDCoFQxXSBkZWJ1Z192bV9wZ3RhYmxlOiBkZWJ1Z192bV9wZ3RhYmxlOiBWYWxp ZGF0aW5nCj4+IGFyY2hpdGVjdHVyZSBwYWdlIHRhYmxlIGhlbHBlcnMKPj4gW8KgwqAxNDYuNjQz OTk1XVvCoMKgwqDCoFQxXSAtLS0tLS0tLS0tLS1bIGN1dCBoZXJlIF0tLS0tLS0tLS0tLS0KPj4g W8KgwqAxNDYuNjQ5MzUwXVvCoMKgwqDCoFQxXSB2aXJ0X3RvX3BoeXMgdXNlZCBmb3Igbm9uLWxp bmVhciBhZGRyZXNzOgo+PiAoX19fX3B0cnZhbF9fX18pIChzdGFydF9rZXJuZWwrMHgwLzB4NTgw KQo+IAo+IE11c3QgYmUgc29tZXRoaW5nIHdyb25nIHdpdGggdGhlIGZvbGxvd2luZyBpbiBkZWJ1 Z192bV9wZ3RhYmxlKCkKPiAKPiDCoMKgwqDCoHBhZGRyID0gX19wYSgmc3RhcnRfa2VybmVsKTsK PiAKPiBJcyB0aGVyZSBhbnkgZXhwbGFpbmF0aW9uIHdoeSBzdGFydF9rZXJuZWwoKSBpcyBub3Qg aW4gbGluZWFyIG1lbW9yeSBvbiBBUk02NCA/CgoKQ2M6ICsgSmFtZXMgTW9yc2UgPGphbWVzLm1v cnNlQGFybS5jb20+CgpUaGlzIHdhcm5pbmcgZ2V0cyBleHBvc2VkIHdpdGggREVCVUdfVklSVFVB TCBkdWUgdG8gX19wYSgpIG9uIGEga2VybmVsIHN5bWJvbAppLmUgJ3N0YXJ0X2tlcm5lbCcgd2hp Y2ggbWlnaHQgYmUgb3V0c2lkZSB0aGUgbGluZWFyIG1hcC4gVGhpcyBoYXBwZW5zIGR1ZSB0bwpr ZXJuZWwgbWFwcGluZyBwb3NpdGlvbiByYW5kb21pemF0aW9uIHdpdGggS0FTTFIuIEFkZGluZyBK YW1lcyBoZXJlIGluIGNhc2UgaGUKbWlnaHQgbGlrZSB0byBhZGQgbW9yZS4KCl9fcGFfc3ltYm9s KCkgc2hvdWxkIGhhdmUgYmVlbiB1c2VkIGluc3RlYWQsIGZvciBhY2Nlc3NpbmcgdGhlIHBoeXNp Y2FsIGFkZHJlc3MKaGVyZS4gT24gYXJtNjQgX19wYSgpIGRvZXMgY2hlY2sgZm9yIGxpbmVhciBh ZGRyZXNzIHdpdGggX19pc19sbV9hZGRyZXNzKCkgYW5kCnN3aXRjaCBhY2NvcmRpbmdseSBpZiBp dCBpcyBhIGtlcm5lbCB0ZXh0IHN5bWJvbC4gTmV2ZXJ0aGVsZXNzLCBpdHMgbXVjaCBiZXR0ZXIK dG8gdXNlIF9fcGFfc3ltYm9sKCkgaGVyZSByYXRoZXIgdGhhbiBfX3BhKCkuCgpSYXRoZXIgdGhh biByZXNwaW5pbmcgdGhlIHBhdGNoIG9uY2UgbW9yZSwgd2lsbCBqdXN0IHNlbmQgYSBmaXggcmVw bGFjaW5nIHRoaXMKaGVscGVyIF9fcGEoKSB3aXRoIF9fcGFfc3ltYm9sKCkgZm9yIEFuZHJldyB0 byBwaWNrIHVwIGFzIHRoaXMgcGF0Y2ggaXMgYWxyZWFkeQpwYXJ0IG9mIGxpbnV4LW5leHQgKG5l eHQtMjAyMDAyMjYpLiBCdXQgY2FuIGRlZmluaXRlbHkgcmVzcGluIGlmIHRoYXQgd2lsbCBiZQpw cmVmZXJyZWQuCgpUaGFua3MgUWlhbiBmb3IgY2F0Y2hpbmcgdGhpcy4KCj4gCj4gQ2hyaXN0b3Bo ZQo+IAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGlu dXgtc25wcy1hcmMgbWFpbGluZyBsaXN0CmxpbnV4LXNucHMtYXJjQGxpc3RzLmluZnJhZGVhZC5v cmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1zbnBz LWFyYwo= 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=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 A1264C4BA37 for ; 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Wed, 26 Feb 2020 18:34:06 -0800 (PST) From: Anshuman Khandual Subject: Re: [PATCH V14] mm/debug: Add tests validating architecture page table helpers To: Christophe Leroy , Qian Cai , linux-mm@kvack.org References: <1581909460-19148-1-git-send-email-anshuman.khandual@arm.com> <1582726182.7365.123.camel@lca.pw> <1582726340.7365.124.camel@lca.pw> Message-ID: <52db1e9b-83b3-c41f-ef03-0f43e2159a83@arm.com> Date: Thu, 27 Feb 2020 08:04:05 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200226_183418_750168_0EB2F9C1 X-CRM114-Status: GOOD ( 14.19 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Catalin Marinas , Heiko Carstens , Paul Mackerras , "H. Peter Anvin" , linux-riscv@lists.infradead.org, Will Deacon , linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, Michael Ellerman , x86@kernel.org, Mike Rapoport , Christian Borntraeger , Ingo Molnar , Benjamin Herrenschmidt , James Morse , linux-snps-arc@lists.infradead.org, Vasily Gorbik , Borislav Petkov , Paul Walmsley , "Kirill A . Shutemov" , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Vineet Gupta , linux-kernel@vger.kernel.org, Palmer Dabbelt , Andrew Morton , linuxppc-dev@lists.ozlabs.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gMDIvMjYvMjAyMCAwODoxNCBQTSwgQ2hyaXN0b3BoZSBMZXJveSB3cm90ZToKPiAKPiAKPiBM ZSAyNi8wMi8yMDIwIMOgIDE1OjEyLCBRaWFuIENhaSBhIMOpY3JpdMKgOgo+PiBPbiBXZWQsIDIw MjAtMDItMjYgYXQgMDk6MDkgLTA1MDAsIFFpYW4gQ2FpIHdyb3RlOgo+Pj4gT24gTW9uLCAyMDIw LTAyLTE3IGF0IDA4OjQ3ICswNTMwLCBBbnNodW1hbiBLaGFuZHVhbCB3cm90ZToKPj4+Cj4+PiBI b3cgdXNlZnVsIGlzIHRoaXMgdGhhdCBzdHJhaWdodGx5IGNyYXNoIHRoZSBwb3dlcnBjPwo+Pgo+ PiBBbmQgdGhlbiBnZW5lcmF0ZSB3YXJuaW5ncyBvbiBhcm02NCwKPj4KPj4gW8KgwqAxNDYuNjM0 NjI2XVvCoMKgwqDCoFQxXSBkZWJ1Z192bV9wZ3RhYmxlOiBkZWJ1Z192bV9wZ3RhYmxlOiBWYWxp ZGF0aW5nCj4+IGFyY2hpdGVjdHVyZSBwYWdlIHRhYmxlIGhlbHBlcnMKPj4gW8KgwqAxNDYuNjQz OTk1XVvCoMKgwqDCoFQxXSAtLS0tLS0tLS0tLS1bIGN1dCBoZXJlIF0tLS0tLS0tLS0tLS0KPj4g W8KgwqAxNDYuNjQ5MzUwXVvCoMKgwqDCoFQxXSB2aXJ0X3RvX3BoeXMgdXNlZCBmb3Igbm9uLWxp bmVhciBhZGRyZXNzOgo+PiAoX19fX3B0cnZhbF9fX18pIChzdGFydF9rZXJuZWwrMHgwLzB4NTgw KQo+IAo+IE11c3QgYmUgc29tZXRoaW5nIHdyb25nIHdpdGggdGhlIGZvbGxvd2luZyBpbiBkZWJ1 Z192bV9wZ3RhYmxlKCkKPiAKPiDCoMKgwqDCoHBhZGRyID0gX19wYSgmc3RhcnRfa2VybmVsKTsK PiAKPiBJcyB0aGVyZSBhbnkgZXhwbGFpbmF0aW9uIHdoeSBzdGFydF9rZXJuZWwoKSBpcyBub3Qg aW4gbGluZWFyIG1lbW9yeSBvbiBBUk02NCA/CgoKQ2M6ICsgSmFtZXMgTW9yc2UgPGphbWVzLm1v cnNlQGFybS5jb20+CgpUaGlzIHdhcm5pbmcgZ2V0cyBleHBvc2VkIHdpdGggREVCVUdfVklSVFVB TCBkdWUgdG8gX19wYSgpIG9uIGEga2VybmVsIHN5bWJvbAppLmUgJ3N0YXJ0X2tlcm5lbCcgd2hp Y2ggbWlnaHQgYmUgb3V0c2lkZSB0aGUgbGluZWFyIG1hcC4gVGhpcyBoYXBwZW5zIGR1ZSB0bwpr ZXJuZWwgbWFwcGluZyBwb3NpdGlvbiByYW5kb21pemF0aW9uIHdpdGggS0FTTFIuIEFkZGluZyBK YW1lcyBoZXJlIGluIGNhc2UgaGUKbWlnaHQgbGlrZSB0byBhZGQgbW9yZS4KCl9fcGFfc3ltYm9s KCkgc2hvdWxkIGhhdmUgYmVlbiB1c2VkIGluc3RlYWQsIGZvciBhY2Nlc3NpbmcgdGhlIHBoeXNp Y2FsIGFkZHJlc3MKaGVyZS4gT24gYXJtNjQgX19wYSgpIGRvZXMgY2hlY2sgZm9yIGxpbmVhciBh ZGRyZXNzIHdpdGggX19pc19sbV9hZGRyZXNzKCkgYW5kCnN3aXRjaCBhY2NvcmRpbmdseSBpZiBp dCBpcyBhIGtlcm5lbCB0ZXh0IHN5bWJvbC4gTmV2ZXJ0aGVsZXNzLCBpdHMgbXVjaCBiZXR0ZXIK dG8gdXNlIF9fcGFfc3ltYm9sKCkgaGVyZSByYXRoZXIgdGhhbiBfX3BhKCkuCgpSYXRoZXIgdGhh biByZXNwaW5pbmcgdGhlIHBhdGNoIG9uY2UgbW9yZSwgd2lsbCBqdXN0IHNlbmQgYSBmaXggcmVw bGFjaW5nIHRoaXMKaGVscGVyIF9fcGEoKSB3aXRoIF9fcGFfc3ltYm9sKCkgZm9yIEFuZHJldyB0 byBwaWNrIHVwIGFzIHRoaXMgcGF0Y2ggaXMgYWxyZWFkeQpwYXJ0IG9mIGxpbnV4LW5leHQgKG5l eHQtMjAyMDAyMjYpLiBCdXQgY2FuIGRlZmluaXRlbHkgcmVzcGluIGlmIHRoYXQgd2lsbCBiZQpw cmVmZXJyZWQuCgpUaGFua3MgUWlhbiBmb3IgY2F0Y2hpbmcgdGhpcy4KCj4gCj4gQ2hyaXN0b3Bo ZQo+IAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGlu dXgtYXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRl YWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgt YXJtLWtlcm5lbAo=