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 Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 395C3C43334 for ; Sun, 5 Jun 2022 09:51:54 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4LGBjN6Ttbz3bxr for ; Sun, 5 Jun 2022 19:51:52 +1000 (AEST) 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=) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lists.ozlabs.org (Postfix) with ESMTP id 4LGBhw3brxz2yMf for ; Sun, 5 Jun 2022 19:51:27 +1000 (AEST) 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 4AEC0D6E; Sun, 5 Jun 2022 02:50:56 -0700 (PDT) Received: from [10.163.37.253] (unknown [10.163.37.253]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 3BD7E3F73D; Sun, 5 Jun 2022 02:50:47 -0700 (PDT) Message-ID: <03fb0343-25ec-0356-211f-edbea7541429@arm.com> Date: Sun, 5 Jun 2022 15:20:47 +0530 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: Re: [PATCH 4/6] csky/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Content-Language: en-US To: Guo Ren References: <20220603101411.488970-1-anshuman.khandual@arm.com> <20220603101411.488970-5-anshuman.khandual@arm.com> From: Anshuman Khandual In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit 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 , Linux Kernel Mailing List , Linux-MM , Paul Mackerras , sparclinux , Will Deacon , Jonas Bonn , linux-s390 , the arch/x86 maintainers , linux-csky@vger.kernel.org, Ingo Molnar , Geert Uytterhoeven , Vasily Gorbik , Heiko Carstens , Openrisc , Thomas Gleixner , Linux ARM , Thomas Bogendoerfer , "open list:BROADCOM NVRAM DRIVER" , Dinh Nguyen , Andrew Morton , linuxppc-dev , "David S. Miller" Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 6/4/22 17:43, Guo Ren wrote: > Acked-by: Guo Ren I will resend this series with suggested changes. > > On Fri, Jun 3, 2022 at 6:15 PM Anshuman Khandual > wrote: >> >> This defines and exports a platform specific custom vm_get_page_prot() via >> subscribing ARCH_HAS_VM_GET_PAGE_PROT. Subsequently all __SXXX and __PXXX >> macros can be dropped which are no longer needed. >> >> Cc: Geert Uytterhoeven >> Cc: linux-csky@vger.kernel.org >> Cc: linux-kernel@vger.kernel.org >> Acked-by: Guo Ren >> Signed-off-by: Anshuman Khandual >> --- >> arch/csky/Kconfig | 1 + >> arch/csky/include/asm/pgtable.h | 18 ------------------ >> arch/csky/mm/init.c | 32 ++++++++++++++++++++++++++++++++ >> 3 files changed, 33 insertions(+), 18 deletions(-) >> >> diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig >> index 21d72b078eef..588b8a9c68ed 100644 >> --- a/arch/csky/Kconfig >> +++ b/arch/csky/Kconfig >> @@ -6,6 +6,7 @@ config CSKY >> select ARCH_HAS_GCOV_PROFILE_ALL >> select ARCH_HAS_SYNC_DMA_FOR_CPU >> select ARCH_HAS_SYNC_DMA_FOR_DEVICE >> + select ARCH_HAS_VM_GET_PAGE_PROT >> select ARCH_USE_BUILTIN_BSWAP >> select ARCH_USE_QUEUED_RWLOCKS >> select ARCH_WANT_FRAME_POINTERS if !CPU_CK610 && $(cc-option,-mbacktrace) >> diff --git a/arch/csky/include/asm/pgtable.h b/arch/csky/include/asm/pgtable.h >> index bbe245117777..229a5f4ad7fc 100644 >> --- a/arch/csky/include/asm/pgtable.h >> +++ b/arch/csky/include/asm/pgtable.h >> @@ -77,24 +77,6 @@ >> #define MAX_SWAPFILES_CHECK() \ >> BUILD_BUG_ON(MAX_SWAPFILES_SHIFT != 5) >> >> -#define __P000 PAGE_NONE >> -#define __P001 PAGE_READ >> -#define __P010 PAGE_READ >> -#define __P011 PAGE_READ >> -#define __P100 PAGE_READ >> -#define __P101 PAGE_READ >> -#define __P110 PAGE_READ >> -#define __P111 PAGE_READ >> - >> -#define __S000 PAGE_NONE >> -#define __S001 PAGE_READ >> -#define __S010 PAGE_WRITE >> -#define __S011 PAGE_WRITE >> -#define __S100 PAGE_READ >> -#define __S101 PAGE_READ >> -#define __S110 PAGE_WRITE >> -#define __S111 PAGE_WRITE >> - >> extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; >> #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) >> >> diff --git a/arch/csky/mm/init.c b/arch/csky/mm/init.c >> index bf2004aa811a..f9babbed17d4 100644 >> --- a/arch/csky/mm/init.c >> +++ b/arch/csky/mm/init.c >> @@ -197,3 +197,35 @@ void __init fixaddr_init(void) >> vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK; >> fixrange_init(vaddr, vaddr + PMD_SIZE, swapper_pg_dir); >> } >> + >> +pgprot_t vm_get_page_prot(unsigned long vm_flags) >> +{ >> + switch (vm_flags & (VM_READ | VM_WRITE | VM_EXEC | VM_SHARED)) { >> + case VM_NONE: >> + return PAGE_NONE; >> + case VM_READ: >> + case VM_WRITE: >> + case VM_WRITE | VM_READ: >> + case VM_EXEC: >> + case VM_EXEC | VM_READ: >> + case VM_EXEC | VM_WRITE: >> + case VM_EXEC | VM_WRITE | VM_READ: >> + return PAGE_READ; >> + case VM_SHARED: >> + return PAGE_NONE; >> + case VM_SHARED | VM_READ: >> + return PAGE_READ; >> + case VM_SHARED | VM_WRITE: >> + case VM_SHARED | VM_WRITE | VM_READ: >> + return PAGE_WRITE; >> + case VM_SHARED | VM_EXEC: >> + case VM_SHARED | VM_EXEC | VM_READ: >> + return PAGE_READ; >> + case VM_SHARED | VM_EXEC | VM_WRITE: >> + case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ: >> + return PAGE_WRITE; >> + default: >> + BUILD_BUG(); >> + } >> +} >> +EXPORT_SYMBOL(vm_get_page_prot); >> -- >> 2.25.1 >> > >