From patchwork Tue Jan 7 20:59:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 11321761 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5ACBA139A for ; Tue, 7 Jan 2020 21:00:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 40EE6214D8 for ; Tue, 7 Jan 2020 21:00:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728302AbgAGVAR (ORCPT ); Tue, 7 Jan 2020 16:00:17 -0500 Received: from ale.deltatee.com ([207.54.116.67]:51274 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728280AbgAGVAP (ORCPT ); Tue, 7 Jan 2020 16:00:15 -0500 Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1iovxO-0007vq-Dz; Tue, 07 Jan 2020 14:00:07 -0700 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.92) (envelope-from ) id 1iovxI-0001z4-Ek; Tue, 07 Jan 2020 14:00:00 -0700 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, Dan Williams , Michal Hocko , David Hildenbrand , Andrew Morton Cc: Christoph Hellwig , Catalin Marinas , Will Deacon , Benjamin Herrenschmidt , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Eric Badger , Logan Gunthorpe Date: Tue, 7 Jan 2020 13:59:52 -0700 Message-Id: <20200107205959.7575-2-logang@deltatee.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200107205959.7575-1-logang@deltatee.com> References: <20200107205959.7575-1-logang@deltatee.com> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, dan.j.williams@intel.com, akpm@linux-foundation.org, hch@lst.de, catalin.marinas@arm.com, benh@kernel.crashing.org, tglx@linutronix.de, david@redhat.com, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, mhocko@kernel.org, will@kernel.org, luto@kernel.org, peterz@infradead.org, ebadger@gigaio.com, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on ale.deltatee.com X-Spam-Level: X-Spam-Status: No, score=-8.7 required=5.0 tests=ALL_TRUSTED,BAYES_00, GREYLIST_ISWHITE,MYRULES_NO_TEXT autolearn=ham autolearn_force=no version=3.4.2 Subject: [PATCH v2 1/8] mm/memory_hotplug: Drop the flags field from struct mhp_restrictions X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org This variable is not used anywhere and should therefore be removed from the structure. Signed-off-by: Logan Gunthorpe Reviewed-by: David Hildenbrand --- include/linux/memory_hotplug.h | 2 -- 1 file changed, 2 deletions(-) diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index ba0dca6aac6e..e47a29761088 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -55,11 +55,9 @@ enum { /* * Restrictions for the memory hotplug: - * flags: MHP_ flags * altmap: alternative allocator for memmap array */ struct mhp_restrictions { - unsigned long flags; struct vmem_altmap *altmap; }; From patchwork Tue Jan 7 20:59:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 11321863 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A2A83109A for ; Tue, 7 Jan 2020 21:24:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 77D4C2081E for ; Tue, 7 Jan 2020 21:24:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728317AbgAGVAS (ORCPT ); Tue, 7 Jan 2020 16:00:18 -0500 Received: from ale.deltatee.com ([207.54.116.67]:51292 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728294AbgAGVAR (ORCPT ); Tue, 7 Jan 2020 16:00:17 -0500 Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1iovxO-0007vr-Dy; Tue, 07 Jan 2020 14:00:11 -0700 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.92) (envelope-from ) id 1iovxI-0001z7-I2; Tue, 07 Jan 2020 14:00:00 -0700 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, Dan Williams , Michal Hocko , David Hildenbrand , Andrew Morton Cc: Christoph Hellwig , Catalin Marinas , Will Deacon , Benjamin Herrenschmidt , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Eric Badger , Logan Gunthorpe Date: Tue, 7 Jan 2020 13:59:53 -0700 Message-Id: <20200107205959.7575-3-logang@deltatee.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200107205959.7575-1-logang@deltatee.com> References: <20200107205959.7575-1-logang@deltatee.com> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, dan.j.williams@intel.com, akpm@linux-foundation.org, hch@lst.de, catalin.marinas@arm.com, benh@kernel.crashing.org, tglx@linutronix.de, david@redhat.com, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, mhocko@kernel.org, will@kernel.org, luto@kernel.org, peterz@infradead.org, ebadger@gigaio.com, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on ale.deltatee.com X-Spam-Level: X-Spam-Status: No, score=-8.5 required=5.0 tests=ALL_TRUSTED,BAYES_00, GREYLIST_ISWHITE,MYRULES_FREE,MYRULES_NO_TEXT autolearn=ham autolearn_force=no version=3.4.2 Subject: [PATCH v2 2/8] mm/memory_hotplug: Rename mhp_restrictions to mhp_modifiers X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org The mhp_restrictions struct really doesn't specify anything resembling a restriction anymore so rename it to be mhp_modifiers. Signed-off-by: Logan Gunthorpe --- arch/arm64/mm/mmu.c | 4 ++-- arch/ia64/mm/init.c | 4 ++-- arch/powerpc/mm/mem.c | 4 ++-- arch/s390/mm/init.c | 6 +++--- arch/sh/mm/init.c | 4 ++-- arch/x86/mm/init_32.c | 4 ++-- arch/x86/mm/init_64.c | 8 ++++---- include/linux/memory_hotplug.h | 12 ++++++------ mm/memory_hotplug.c | 8 ++++---- mm/memremap.c | 8 ++++---- 10 files changed, 31 insertions(+), 31 deletions(-) diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 40797cbfba2d..3320406579c3 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -1050,7 +1050,7 @@ int p4d_free_pud_page(p4d_t *p4d, unsigned long addr) #ifdef CONFIG_MEMORY_HOTPLUG int arch_add_memory(int nid, u64 start, u64 size, - struct mhp_restrictions *restrictions) + struct mhp_modifiers *modifiers) { int flags = 0; @@ -1063,7 +1063,7 @@ int arch_add_memory(int nid, u64 start, u64 size, memblock_clear_nomap(start, size); return __add_pages(nid, start >> PAGE_SHIFT, size >> PAGE_SHIFT, - restrictions); + modifiers); } void arch_remove_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap) diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c index b01d68a2d5d9..daf438e08b96 100644 --- a/arch/ia64/mm/init.c +++ b/arch/ia64/mm/init.c @@ -670,13 +670,13 @@ mem_init (void) #ifdef CONFIG_MEMORY_HOTPLUG int arch_add_memory(int nid, u64 start, u64 size, - struct mhp_restrictions *restrictions) + struct mhp_modifiers *modifiers) { unsigned long start_pfn = start >> PAGE_SHIFT; unsigned long nr_pages = size >> PAGE_SHIFT; int ret; - ret = __add_pages(nid, start_pfn, nr_pages, restrictions); + ret = __add_pages(nid, start_pfn, nr_pages, modifiers); if (ret) printk("%s: Problem encountered in __add_pages() as ret=%d\n", __func__, ret); diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index f5535eae637f..9dd9c3c1be7f 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -127,7 +127,7 @@ static void flush_dcache_range_chunked(unsigned long start, unsigned long stop, } int __ref arch_add_memory(int nid, u64 start, u64 size, - struct mhp_restrictions *restrictions) + struct mhp_modifiers *modifiers) { unsigned long start_pfn = start >> PAGE_SHIFT; unsigned long nr_pages = size >> PAGE_SHIFT; @@ -143,7 +143,7 @@ int __ref arch_add_memory(int nid, u64 start, u64 size, return -EFAULT; } - return __add_pages(nid, start_pfn, nr_pages, restrictions); + return __add_pages(nid, start_pfn, nr_pages, modifiers); } void __ref arch_remove_memory(int nid, u64 start, u64 size, diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index ac44bd76db4b..a0c88c1c9ad0 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -268,20 +268,20 @@ device_initcall(s390_cma_mem_init); #endif /* CONFIG_CMA */ int arch_add_memory(int nid, u64 start, u64 size, - struct mhp_restrictions *restrictions) + struct mhp_modifiers *modifiers) { unsigned long start_pfn = PFN_DOWN(start); unsigned long size_pages = PFN_DOWN(size); int rc; - if (WARN_ON_ONCE(restrictions->altmap)) + if (WARN_ON_ONCE(modifiers->altmap)) return -EINVAL; rc = vmem_add_mapping(start, size); if (rc) return rc; - rc = __add_pages(nid, start_pfn, size_pages, restrictions); + rc = __add_pages(nid, start_pfn, size_pages, modifiers); if (rc) vmem_remove_mapping(start, size); return rc; diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index d1b1ff2be17a..7e64f42fb570 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -406,14 +406,14 @@ void __init mem_init(void) #ifdef CONFIG_MEMORY_HOTPLUG int arch_add_memory(int nid, u64 start, u64 size, - struct mhp_restrictions *restrictions) + struct mhp_modifiers *modifiers) { unsigned long start_pfn = PFN_DOWN(start); unsigned long nr_pages = size >> PAGE_SHIFT; int ret; /* We only have ZONE_NORMAL, so this is easy.. */ - ret = __add_pages(nid, start_pfn, nr_pages, restrictions); + ret = __add_pages(nid, start_pfn, nr_pages, modifiers); if (unlikely(ret)) printk("%s: Failed, __add_pages() == %d\n", __func__, ret); diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index 0a74407ef92e..e6fce2d547f0 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -852,12 +852,12 @@ void __init mem_init(void) #ifdef CONFIG_MEMORY_HOTPLUG int arch_add_memory(int nid, u64 start, u64 size, - struct mhp_restrictions *restrictions) + struct mhp_modifiers *modifiers) { unsigned long start_pfn = start >> PAGE_SHIFT; unsigned long nr_pages = size >> PAGE_SHIFT; - return __add_pages(nid, start_pfn, nr_pages, restrictions); + return __add_pages(nid, start_pfn, nr_pages, modifiers); } void arch_remove_memory(int nid, u64 start, u64 size, diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index bcfede46fe02..516133f555e9 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -844,11 +844,11 @@ static void update_end_of_memory_vars(u64 start, u64 size) } int add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages, - struct mhp_restrictions *restrictions) + struct mhp_modifiers *modifiers) { int ret; - ret = __add_pages(nid, start_pfn, nr_pages, restrictions); + ret = __add_pages(nid, start_pfn, nr_pages, modifiers); WARN_ON_ONCE(ret); /* update max_pfn, max_low_pfn and high_memory */ @@ -859,14 +859,14 @@ int add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages, } int arch_add_memory(int nid, u64 start, u64 size, - struct mhp_restrictions *restrictions) + struct mhp_modifiers *modifiers) { unsigned long start_pfn = start >> PAGE_SHIFT; unsigned long nr_pages = size >> PAGE_SHIFT; init_memory_mapping(start, start + size); - return add_pages(nid, start_pfn, nr_pages, restrictions); + return add_pages(nid, start_pfn, nr_pages, modifiers); } #define PAGE_INUSE 0xFD diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index e47a29761088..2152efae2f4b 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -57,7 +57,7 @@ enum { * Restrictions for the memory hotplug: * altmap: alternative allocator for memmap array */ -struct mhp_restrictions { +struct mhp_modifiers { struct vmem_altmap *altmap; }; @@ -107,7 +107,7 @@ extern int restore_online_page_callback(online_page_callback_t callback); extern int try_online_node(int nid); extern int arch_add_memory(int nid, u64 start, u64 size, - struct mhp_restrictions *restrictions); + struct mhp_modifiers *modifiers); extern u64 max_mem_size; extern bool memhp_auto_online; @@ -125,17 +125,17 @@ extern void __remove_pages(unsigned long start_pfn, unsigned long nr_pages, /* reasonably generic interface to expand the physical pages */ extern int __add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages, - struct mhp_restrictions *restrictions); + struct mhp_modifiers *modifiers); #ifndef CONFIG_ARCH_HAS_ADD_PAGES static inline int add_pages(int nid, unsigned long start_pfn, - unsigned long nr_pages, struct mhp_restrictions *restrictions) + unsigned long nr_pages, struct mhp_modifiers *modifiers) { - return __add_pages(nid, start_pfn, nr_pages, restrictions); + return __add_pages(nid, start_pfn, nr_pages, modifiers); } #else /* ARCH_HAS_ADD_PAGES */ int add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages, - struct mhp_restrictions *restrictions); + struct mhp_modifiers *modifiers); #endif /* ARCH_HAS_ADD_PAGES */ #ifdef CONFIG_NUMA diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index a91a072f2b2c..1bb3f92e087d 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -299,11 +299,11 @@ static int check_hotplug_memory_addressable(unsigned long pfn, * add the new pages. */ int __ref __add_pages(int nid, unsigned long pfn, unsigned long nr_pages, - struct mhp_restrictions *restrictions) + struct mhp_modifiers *modifiers) { int err; unsigned long nr, start_sec, end_sec; - struct vmem_altmap *altmap = restrictions->altmap; + struct vmem_altmap *altmap = modifiers->altmap; err = check_hotplug_memory_addressable(pfn, nr_pages); if (err) @@ -1027,7 +1027,7 @@ static int online_memory_block(struct memory_block *mem, void *arg) */ int __ref add_memory_resource(int nid, struct resource *res) { - struct mhp_restrictions restrictions = {}; + struct mhp_modifiers modifiers = {}; u64 start, size; bool new_node = false; int ret; @@ -1055,7 +1055,7 @@ int __ref add_memory_resource(int nid, struct resource *res) new_node = ret; /* call arch's memory hotadd */ - ret = arch_add_memory(nid, start, size, &restrictions); + ret = arch_add_memory(nid, start, size, &modifiers); if (ret < 0) goto error; diff --git a/mm/memremap.c b/mm/memremap.c index c51c6bd2fe34..e30be8ba706b 100644 --- a/mm/memremap.c +++ b/mm/memremap.c @@ -158,7 +158,7 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid) { struct resource *res = &pgmap->res; struct dev_pagemap *conflict_pgmap; - struct mhp_restrictions restrictions = { + struct mhp_modifiers modifiers = { /* * We do not want any optional features only our own memmap */ @@ -272,7 +272,7 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid) */ if (pgmap->type == MEMORY_DEVICE_PRIVATE) { error = add_pages(nid, PHYS_PFN(res->start), - PHYS_PFN(resource_size(res)), &restrictions); + PHYS_PFN(resource_size(res)), &modifiers); } else { error = kasan_add_zero_shadow(__va(res->start), resource_size(res)); if (error) { @@ -281,7 +281,7 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid) } error = arch_add_memory(nid, res->start, resource_size(res), - &restrictions); + &modifiers); } if (!error) { @@ -289,7 +289,7 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid) zone = &NODE_DATA(nid)->node_zones[ZONE_DEVICE]; move_pfn_range_to_zone(zone, PHYS_PFN(res->start), - PHYS_PFN(resource_size(res)), restrictions.altmap); + PHYS_PFN(resource_size(res)), modifiers.altmap); } mem_hotplug_done(); From patchwork Tue Jan 7 20:59:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 11321859 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DDF47138C for ; Tue, 7 Jan 2020 21:24:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B22332080A for ; Tue, 7 Jan 2020 21:24:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728324AbgAGVAT (ORCPT ); Tue, 7 Jan 2020 16:00:19 -0500 Received: from ale.deltatee.com ([207.54.116.67]:51322 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728312AbgAGVAS (ORCPT ); Tue, 7 Jan 2020 16:00:18 -0500 Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1iovxO-0007vs-Jx; Tue, 07 Jan 2020 14:00:12 -0700 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.92) (envelope-from ) id 1iovxI-0001zA-LU; Tue, 07 Jan 2020 14:00:00 -0700 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, Dan Williams , Michal Hocko , David Hildenbrand , Andrew Morton Cc: Christoph Hellwig , Catalin Marinas , Will Deacon , Benjamin Herrenschmidt , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Eric Badger , Logan Gunthorpe , "H. Peter Anvin" , x86@kernel.org Date: Tue, 7 Jan 2020 13:59:54 -0700 Message-Id: <20200107205959.7575-4-logang@deltatee.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200107205959.7575-1-logang@deltatee.com> References: <20200107205959.7575-1-logang@deltatee.com> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, dan.j.williams@intel.com, akpm@linux-foundation.org, hch@lst.de, catalin.marinas@arm.com, benh@kernel.crashing.org, tglx@linutronix.de, david@redhat.com, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, peterz@infradead.org, ebadger@gigaio.com, logang@deltatee.com, hpa@zytor.com, mhocko@kernel.org, will@kernel.org, luto@kernel.org, x86@kernel.org X-SA-Exim-Mail-From: gunthorp@deltatee.com X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on ale.deltatee.com X-Spam-Level: X-Spam-Status: No, score=-8.7 required=5.0 tests=ALL_TRUSTED,BAYES_00, GREYLIST_ISWHITE,MYRULES_NO_TEXT autolearn=ham autolearn_force=no version=3.4.2 Subject: [PATCH v2 3/8] x86/mm: Thread pgprot_t through init_memory_mapping() X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org In prepartion to support a pgprot_t argument for arch_add_memory(). It's required to move the prototype of init_memory_mapping() seeing the original location came before the definition of pgprot_t. Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: "H. Peter Anvin" Cc: x86@kernel.org Cc: Dave Hansen Cc: Andy Lutomirski Cc: Peter Zijlstra Signed-off-by: Logan Gunthorpe --- arch/x86/include/asm/page_types.h | 3 --- arch/x86/include/asm/pgtable.h | 3 +++ arch/x86/kernel/amd_gart_64.c | 3 ++- arch/x86/mm/init.c | 9 +++++---- arch/x86/mm/init_32.c | 3 ++- arch/x86/mm/init_64.c | 32 +++++++++++++++++-------------- arch/x86/mm/mm_internal.h | 3 ++- arch/x86/platform/efi/efi_64.c | 3 ++- 8 files changed, 34 insertions(+), 25 deletions(-) diff --git a/arch/x86/include/asm/page_types.h b/arch/x86/include/asm/page_types.h index c85e15010f48..bf7aa2e290ef 100644 --- a/arch/x86/include/asm/page_types.h +++ b/arch/x86/include/asm/page_types.h @@ -73,9 +73,6 @@ static inline phys_addr_t get_max_mapped(void) bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn); -extern unsigned long init_memory_mapping(unsigned long start, - unsigned long end); - extern void initmem_init(void); #endif /* !__ASSEMBLY__ */ diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index ad97dc155195..844635e02da5 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -1041,6 +1041,9 @@ static inline void __meminit init_trampoline_default(void) void __init poking_init(void); +unsigned long init_memory_mapping(unsigned long start, + unsigned long end, pgprot_t prot); + # ifdef CONFIG_RANDOMIZE_MEMORY void __meminit init_trampoline(void); # else diff --git a/arch/x86/kernel/amd_gart_64.c b/arch/x86/kernel/amd_gart_64.c index 4e5f50236048..16133819415c 100644 --- a/arch/x86/kernel/amd_gart_64.c +++ b/arch/x86/kernel/amd_gart_64.c @@ -744,7 +744,8 @@ int __init gart_iommu_init(void) start_pfn = PFN_DOWN(aper_base); if (!pfn_range_is_mapped(start_pfn, end_pfn)) - init_memory_mapping(start_pfn<> PAGE_SHIFT, ret >> PAGE_SHIFT); @@ -521,7 +522,7 @@ static unsigned long __init init_range_memory_mapping( */ can_use_brk_pgt = max(start, (u64)pgt_buf_end<= min(end, (u64)pgt_buf_top<> PAGE_SHIFT, - PAGE_KERNEL_LARGE), + prot), init); spin_unlock(&init_mm.page_table_lock); paddr_last = paddr_next; @@ -669,7 +672,7 @@ phys_pud_init(pud_t *pud_page, unsigned long paddr, unsigned long paddr_end, static unsigned long __meminit phys_p4d_init(p4d_t *p4d_page, unsigned long paddr, unsigned long paddr_end, - unsigned long page_size_mask, bool init) + unsigned long page_size_mask, pgprot_t prot, bool init) { unsigned long vaddr, vaddr_end, vaddr_next, paddr_next, paddr_last; @@ -679,7 +682,7 @@ phys_p4d_init(p4d_t *p4d_page, unsigned long paddr, unsigned long paddr_end, if (!pgtable_l5_enabled()) return phys_pud_init((pud_t *) p4d_page, paddr, paddr_end, - page_size_mask, init); + page_size_mask, prot, init); for (; vaddr < vaddr_end; vaddr = vaddr_next) { p4d_t *p4d = p4d_page + p4d_index(vaddr); @@ -702,13 +705,13 @@ phys_p4d_init(p4d_t *p4d_page, unsigned long paddr, unsigned long paddr_end, if (!p4d_none(*p4d)) { pud = pud_offset(p4d, 0); paddr_last = phys_pud_init(pud, paddr, __pa(vaddr_end), - page_size_mask, init); + page_size_mask, prot, init); continue; } pud = alloc_low_page(); paddr_last = phys_pud_init(pud, paddr, __pa(vaddr_end), - page_size_mask, init); + page_size_mask, prot, init); spin_lock(&init_mm.page_table_lock); p4d_populate_init(&init_mm, p4d, pud, init); @@ -722,7 +725,7 @@ static unsigned long __meminit __kernel_physical_mapping_init(unsigned long paddr_start, unsigned long paddr_end, unsigned long page_size_mask, - bool init) + pgprot_t prot, bool init) { bool pgd_changed = false; unsigned long vaddr, vaddr_start, vaddr_end, vaddr_next, paddr_last; @@ -743,13 +746,13 @@ __kernel_physical_mapping_init(unsigned long paddr_start, paddr_last = phys_p4d_init(p4d, __pa(vaddr), __pa(vaddr_end), page_size_mask, - init); + prot, init); continue; } p4d = alloc_low_page(); paddr_last = phys_p4d_init(p4d, __pa(vaddr), __pa(vaddr_end), - page_size_mask, init); + page_size_mask, prot, init); spin_lock(&init_mm.page_table_lock); if (pgtable_l5_enabled()) @@ -778,10 +781,10 @@ __kernel_physical_mapping_init(unsigned long paddr_start, unsigned long __meminit kernel_physical_mapping_init(unsigned long paddr_start, unsigned long paddr_end, - unsigned long page_size_mask) + unsigned long page_size_mask, pgprot_t prot) { return __kernel_physical_mapping_init(paddr_start, paddr_end, - page_size_mask, true); + page_size_mask, prot, true); } /* @@ -796,7 +799,8 @@ kernel_physical_mapping_change(unsigned long paddr_start, unsigned long page_size_mask) { return __kernel_physical_mapping_init(paddr_start, paddr_end, - page_size_mask, false); + page_size_mask, PAGE_KERNEL, + false); } #ifndef CONFIG_NUMA @@ -864,7 +868,7 @@ int arch_add_memory(int nid, u64 start, u64 size, unsigned long start_pfn = start >> PAGE_SHIFT; unsigned long nr_pages = size >> PAGE_SHIFT; - init_memory_mapping(start, start + size); + init_memory_mapping(start, start + size, PAGE_KERNEL); return add_pages(nid, start_pfn, nr_pages, modifiers); } diff --git a/arch/x86/mm/mm_internal.h b/arch/x86/mm/mm_internal.h index eeae142062ed..3f37b5c80bb3 100644 --- a/arch/x86/mm/mm_internal.h +++ b/arch/x86/mm/mm_internal.h @@ -12,7 +12,8 @@ void early_ioremap_page_table_range_init(void); unsigned long kernel_physical_mapping_init(unsigned long start, unsigned long end, - unsigned long page_size_mask); + unsigned long page_size_mask, + pgprot_t prot); unsigned long kernel_physical_mapping_change(unsigned long start, unsigned long end, unsigned long page_size_mask); diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c index 08ce8177c3af..3d0acfdb58c3 100644 --- a/arch/x86/platform/efi/efi_64.c +++ b/arch/x86/platform/efi/efi_64.c @@ -499,7 +499,8 @@ void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size, if (type == EFI_MEMORY_MAPPED_IO) return ioremap(phys_addr, size); - last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size); + last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size, + PAGE_KERNEL); if ((last_map_pfn << PAGE_SHIFT) < phys_addr + size) { unsigned long top = last_map_pfn << PAGE_SHIFT; efi_ioremap(top, size - (top - phys_addr), type, attribute); From patchwork Tue Jan 7 20:59:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 11321867 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0BAB4138C for ; Tue, 7 Jan 2020 21:24:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E878C2081E for ; Tue, 7 Jan 2020 21:24:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728521AbgAGVYp (ORCPT ); Tue, 7 Jan 2020 16:24:45 -0500 Received: from ale.deltatee.com ([207.54.116.67]:51298 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728298AbgAGVAS (ORCPT ); Tue, 7 Jan 2020 16:00:18 -0500 Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1iovxO-0007vt-Jx; Tue, 07 Jan 2020 14:00:12 -0700 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.92) (envelope-from ) id 1iovxI-0001zD-Oz; Tue, 07 Jan 2020 14:00:00 -0700 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, Dan Williams , Michal Hocko , David Hildenbrand , Andrew Morton Cc: Christoph Hellwig , Catalin Marinas , Will Deacon , Benjamin Herrenschmidt , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Eric Badger , Logan Gunthorpe , "H. Peter Anvin" , x86@kernel.org Date: Tue, 7 Jan 2020 13:59:55 -0700 Message-Id: <20200107205959.7575-5-logang@deltatee.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200107205959.7575-1-logang@deltatee.com> References: <20200107205959.7575-1-logang@deltatee.com> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, dan.j.williams@intel.com, akpm@linux-foundation.org, hch@lst.de, catalin.marinas@arm.com, benh@kernel.crashing.org, tglx@linutronix.de, david@redhat.com, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, peterz@infradead.org, ebadger@gigaio.com, logang@deltatee.com, hpa@zytor.com, mhocko@kernel.org, will@kernel.org, luto@kernel.org, x86@kernel.org X-SA-Exim-Mail-From: gunthorp@deltatee.com X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on ale.deltatee.com X-Spam-Level: X-Spam-Status: No, score=-6.7 required=5.0 tests=ALL_TRUSTED,BAYES_00, MYRULES_NO_TEXT autolearn=no autolearn_force=no version=3.4.2 Subject: [PATCH v2 4/8] x86/mm: Introduce _set_memory_prot() X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org For use in the 32bit arch_add_memory() to set the pgprot type of the memory to add. Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: "H. Peter Anvin" Cc: x86@kernel.org Cc: Dave Hansen Cc: Andy Lutomirski Cc: Peter Zijlstra Signed-off-by: Logan Gunthorpe --- arch/x86/include/asm/set_memory.h | 1 + arch/x86/mm/pageattr.c | 7 +++++++ 2 files changed, 8 insertions(+) diff --git a/arch/x86/include/asm/set_memory.h b/arch/x86/include/asm/set_memory.h index 2ee8e469dcf5..d728c2f3ad96 100644 --- a/arch/x86/include/asm/set_memory.h +++ b/arch/x86/include/asm/set_memory.h @@ -34,6 +34,7 @@ * The caller is required to take care of these. */ +int _set_memory_prot(unsigned long addr, int numpages, pgprot_t prot); int _set_memory_uc(unsigned long addr, int numpages); int _set_memory_wc(unsigned long addr, int numpages); int _set_memory_wt(unsigned long addr, int numpages); diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index 1b99ad05b117..2f1934d7b8d9 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -1781,6 +1781,13 @@ static inline int cpa_clear_pages_array(struct page **pages, int numpages, CPA_PAGES_ARRAY, pages); } +int _set_memory_prot(unsigned long addr, int numpages, pgprot_t prot) +{ + return change_page_attr_set_clr(&addr, numpages, prot, + __pgprot(~pgprot_val(prot)), 0, 0, + NULL); +} + int _set_memory_uc(unsigned long addr, int numpages) { /* From patchwork Tue Jan 7 20:59:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 11321881 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7924F109A for ; Tue, 7 Jan 2020 21:25:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 57C92206F0 for ; Tue, 7 Jan 2020 21:25:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728523AbgAGVYy (ORCPT ); Tue, 7 Jan 2020 16:24:54 -0500 Received: from ale.deltatee.com ([207.54.116.67]:51290 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728293AbgAGVAR (ORCPT ); Tue, 7 Jan 2020 16:00:17 -0500 Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1iovxQ-0007vu-Dd; Tue, 07 Jan 2020 14:00:11 -0700 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.92) (envelope-from ) id 1iovxI-0001zG-Sv; Tue, 07 Jan 2020 14:00:00 -0700 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, Dan Williams , Michal Hocko , David Hildenbrand , Andrew Morton Cc: Christoph Hellwig , Catalin Marinas , Will Deacon , Benjamin Herrenschmidt , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Eric Badger , Logan Gunthorpe , Paul Mackerras , Michael Ellerman Date: Tue, 7 Jan 2020 13:59:56 -0700 Message-Id: <20200107205959.7575-6-logang@deltatee.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200107205959.7575-1-logang@deltatee.com> References: <20200107205959.7575-1-logang@deltatee.com> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, dan.j.williams@intel.com, akpm@linux-foundation.org, hch@lst.de, catalin.marinas@arm.com, benh@kernel.crashing.org, tglx@linutronix.de, david@redhat.com, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, mhocko@kernel.org, will@kernel.org, luto@kernel.org, peterz@infradead.org, ebadger@gigaio.com, logang@deltatee.com, paulus@samba.org, mpe@ellerman.id.au X-SA-Exim-Mail-From: gunthorp@deltatee.com X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on ale.deltatee.com X-Spam-Level: X-Spam-Status: No, score=-8.7 required=5.0 tests=ALL_TRUSTED,BAYES_00, GREYLIST_ISWHITE,MYRULES_NO_TEXT autolearn=ham autolearn_force=no version=3.4.2 Subject: [PATCH v2 5/8] powerpc/mm: Thread pgprot_t through create_section_mapping() X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org In prepartion to support a pgprot_t argument for arch_add_memory(). Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Michael Ellerman Signed-off-by: Logan Gunthorpe --- arch/powerpc/include/asm/book3s/64/hash.h | 3 ++- arch/powerpc/include/asm/book3s/64/radix.h | 3 ++- arch/powerpc/include/asm/sparsemem.h | 3 ++- arch/powerpc/mm/book3s64/hash_utils.c | 5 +++-- arch/powerpc/mm/book3s64/pgtable.c | 7 ++++--- arch/powerpc/mm/book3s64/radix_pgtable.c | 18 +++++++++++------- arch/powerpc/mm/mem.c | 5 +++-- 7 files changed, 27 insertions(+), 17 deletions(-) diff --git a/arch/powerpc/include/asm/book3s/64/hash.h b/arch/powerpc/include/asm/book3s/64/hash.h index 2781ebf6add4..6fc4520092c7 100644 --- a/arch/powerpc/include/asm/book3s/64/hash.h +++ b/arch/powerpc/include/asm/book3s/64/hash.h @@ -251,7 +251,8 @@ extern int __meminit hash__vmemmap_create_mapping(unsigned long start, extern void hash__vmemmap_remove_mapping(unsigned long start, unsigned long page_size); -int hash__create_section_mapping(unsigned long start, unsigned long end, int nid); +int hash__create_section_mapping(unsigned long start, unsigned long end, + int nid, pgprot_t prot); int hash__remove_section_mapping(unsigned long start, unsigned long end); #endif /* !__ASSEMBLY__ */ diff --git a/arch/powerpc/include/asm/book3s/64/radix.h b/arch/powerpc/include/asm/book3s/64/radix.h index d97db3ad9aae..46799f3c3d1d 100644 --- a/arch/powerpc/include/asm/book3s/64/radix.h +++ b/arch/powerpc/include/asm/book3s/64/radix.h @@ -289,7 +289,8 @@ static inline unsigned long radix__get_tree_size(void) } #ifdef CONFIG_MEMORY_HOTPLUG -int radix__create_section_mapping(unsigned long start, unsigned long end, int nid); +int radix__create_section_mapping(unsigned long start, unsigned long end, + int nid, pgprot_t prot); int radix__remove_section_mapping(unsigned long start, unsigned long end); #endif /* CONFIG_MEMORY_HOTPLUG */ #endif /* __ASSEMBLY__ */ diff --git a/arch/powerpc/include/asm/sparsemem.h b/arch/powerpc/include/asm/sparsemem.h index 3192d454a733..c89b32443cff 100644 --- a/arch/powerpc/include/asm/sparsemem.h +++ b/arch/powerpc/include/asm/sparsemem.h @@ -13,7 +13,8 @@ #endif /* CONFIG_SPARSEMEM */ #ifdef CONFIG_MEMORY_HOTPLUG -extern int create_section_mapping(unsigned long start, unsigned long end, int nid); +extern int create_section_mapping(unsigned long start, unsigned long end, + int nid, pgprot_t prot); extern int remove_section_mapping(unsigned long start, unsigned long end); #ifdef CONFIG_PPC_BOOK3S_64 diff --git a/arch/powerpc/mm/book3s64/hash_utils.c b/arch/powerpc/mm/book3s64/hash_utils.c index b30435c7d804..276e353d5264 100644 --- a/arch/powerpc/mm/book3s64/hash_utils.c +++ b/arch/powerpc/mm/book3s64/hash_utils.c @@ -800,7 +800,8 @@ int resize_hpt_for_hotplug(unsigned long new_mem_size) return 0; } -int hash__create_section_mapping(unsigned long start, unsigned long end, int nid) +int hash__create_section_mapping(unsigned long start, unsigned long end, + int nid, pgprot_t prot) { int rc; @@ -810,7 +811,7 @@ int hash__create_section_mapping(unsigned long start, unsigned long end, int nid } rc = htab_bolt_mapping(start, end, __pa(start), - pgprot_val(PAGE_KERNEL), mmu_linear_psize, + pgprot_val(prot), mmu_linear_psize, mmu_kernel_ssize); if (rc < 0) { diff --git a/arch/powerpc/mm/book3s64/pgtable.c b/arch/powerpc/mm/book3s64/pgtable.c index 75483b40fcb1..b60c18d2e5c9 100644 --- a/arch/powerpc/mm/book3s64/pgtable.c +++ b/arch/powerpc/mm/book3s64/pgtable.c @@ -171,12 +171,13 @@ void mmu_cleanup_all(void) } #ifdef CONFIG_MEMORY_HOTPLUG -int __meminit create_section_mapping(unsigned long start, unsigned long end, int nid) +int __meminit create_section_mapping(unsigned long start, unsigned long end, + int nid, pgprot_t prot) { if (radix_enabled()) - return radix__create_section_mapping(start, end, nid); + return radix__create_section_mapping(start, end, nid, prot); - return hash__create_section_mapping(start, end, nid); + return hash__create_section_mapping(start, end, nid, prot); } int __meminit remove_section_mapping(unsigned long start, unsigned long end) diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c index 974109bb85db..2a21fb4a22b2 100644 --- a/arch/powerpc/mm/book3s64/radix_pgtable.c +++ b/arch/powerpc/mm/book3s64/radix_pgtable.c @@ -253,7 +253,7 @@ static unsigned long next_boundary(unsigned long addr, unsigned long end) static int __meminit create_physical_mapping(unsigned long start, unsigned long end, - int nid) + int nid, pgprot_t _prot) { unsigned long vaddr, addr, mapping_size = 0; bool prev_exec, exec = false; @@ -289,7 +289,7 @@ static int __meminit create_physical_mapping(unsigned long start, prot = PAGE_KERNEL_X; exec = true; } else { - prot = PAGE_KERNEL; + prot = _prot; exec = false; } @@ -333,7 +333,7 @@ static void __init radix_init_pgtable(void) WARN_ON(create_physical_mapping(reg->base, reg->base + reg->size, - -1)); + -1, PAGE_KERNEL)); } /* Find out how many PID bits are supported */ @@ -708,8 +708,10 @@ static int __meminit stop_machine_change_mapping(void *data) spin_unlock(&init_mm.page_table_lock); pte_clear(&init_mm, params->aligned_start, params->pte); - create_physical_mapping(__pa(params->aligned_start), __pa(params->start), -1); - create_physical_mapping(__pa(params->end), __pa(params->aligned_end), -1); + create_physical_mapping(__pa(params->aligned_start), + __pa(params->start), -1, PAGE_KERNEL); + create_physical_mapping(__pa(params->end), __pa(params->aligned_end), + -1, PAGE_KERNEL); spin_lock(&init_mm.page_table_lock); return 0; } @@ -866,14 +868,16 @@ static void __meminit remove_pagetable(unsigned long start, unsigned long end) radix__flush_tlb_kernel_range(start, end); } -int __meminit radix__create_section_mapping(unsigned long start, unsigned long end, int nid) +int __meminit radix__create_section_mapping(unsigned long start, + unsigned long end, int nid, + pgprot_t prot) { if (end >= RADIX_VMALLOC_START) { pr_warn("Outside the supported range\n"); return -1; } - return create_physical_mapping(__pa(start), __pa(end), nid); + return create_physical_mapping(__pa(start), __pa(end), nid, prot); } int __meminit radix__remove_section_mapping(unsigned long start, unsigned long end) diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 9dd9c3c1be7f..631ee684721f 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -95,7 +95,8 @@ int memory_add_physaddr_to_nid(u64 start) } #endif -int __weak create_section_mapping(unsigned long start, unsigned long end, int nid) +int __weak create_section_mapping(unsigned long start, unsigned long end, + int nid, pgprot_t prot) { return -ENODEV; } @@ -136,7 +137,7 @@ int __ref arch_add_memory(int nid, u64 start, u64 size, resize_hpt_for_hotplug(memblock_phys_mem_size()); start = (unsigned long)__va(start); - rc = create_section_mapping(start, start + size, nid); + rc = create_section_mapping(start, start + size, nid, PAGE_KERNEL); if (rc) { pr_warn("Unable to create mapping for hot added memory 0x%llx..0x%llx: %d\n", start, start + size, rc); From patchwork Tue Jan 7 20:59:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 11321883 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 000FA138C for ; Tue, 7 Jan 2020 21:25:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DCBFD206F0 for ; Tue, 7 Jan 2020 21:25:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728297AbgAGVAQ (ORCPT ); Tue, 7 Jan 2020 16:00:16 -0500 Received: from ale.deltatee.com ([207.54.116.67]:51276 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728281AbgAGVAP (ORCPT ); Tue, 7 Jan 2020 16:00:15 -0500 Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1iovxO-0007vv-QG; Tue, 07 Jan 2020 14:00:09 -0700 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.92) (envelope-from ) id 1iovxJ-0001zJ-1Y; Tue, 07 Jan 2020 14:00:01 -0700 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, Dan Williams , Michal Hocko , David Hildenbrand , Andrew Morton Cc: Christoph Hellwig , Catalin Marinas , Will Deacon , Benjamin Herrenschmidt , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Eric Badger , Logan Gunthorpe , Heiko Carstens , Vasily Gorbik , Christian Borntraeger Date: Tue, 7 Jan 2020 13:59:57 -0700 Message-Id: <20200107205959.7575-7-logang@deltatee.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200107205959.7575-1-logang@deltatee.com> References: <20200107205959.7575-1-logang@deltatee.com> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, dan.j.williams@intel.com, akpm@linux-foundation.org, hch@lst.de, catalin.marinas@arm.com, benh@kernel.crashing.org, tglx@linutronix.de, david@redhat.com, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, mhocko@kernel.org, will@kernel.org, luto@kernel.org, peterz@infradead.org, ebadger@gigaio.com, logang@deltatee.com, gor@linux.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com X-SA-Exim-Mail-From: gunthorp@deltatee.com X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on ale.deltatee.com X-Spam-Level: X-Spam-Status: No, score=-8.5 required=5.0 tests=ALL_TRUSTED,BAYES_00, GREYLIST_ISWHITE,MYRULES_FREE,MYRULES_NO_TEXT autolearn=ham autolearn_force=no version=3.4.2 Subject: [PATCH v2 6/8] s390/mm: Thread pgprot_t through vmem_add_mapping() X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org In prepartion to support a pgprot_t argument for arch_add_memory(). Cc: Heiko Carstens Cc: Vasily Gorbik Cc: Christian Borntraeger Signed-off-by: Logan Gunthorpe --- arch/s390/include/asm/pgtable.h | 3 ++- arch/s390/mm/extmem.c | 3 ++- arch/s390/mm/init.c | 2 +- arch/s390/mm/vmem.c | 10 +++++----- 4 files changed, 10 insertions(+), 8 deletions(-) diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 7b03037a8475..e667a1a96879 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -1640,7 +1640,8 @@ static inline swp_entry_t __swp_entry(unsigned long type, unsigned long offset) #define kern_addr_valid(addr) (1) -extern int vmem_add_mapping(unsigned long start, unsigned long size); +extern int vmem_add_mapping(unsigned long start, unsigned long size, + pgprot_t prot); extern int vmem_remove_mapping(unsigned long start, unsigned long size); extern int s390_enable_sie(void); extern int s390_enable_skey(void); diff --git a/arch/s390/mm/extmem.c b/arch/s390/mm/extmem.c index fd0dae9d10f4..6cf7029a7b35 100644 --- a/arch/s390/mm/extmem.c +++ b/arch/s390/mm/extmem.c @@ -313,7 +313,8 @@ __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long goto out_free; } - rc = vmem_add_mapping(seg->start_addr, seg->end - seg->start_addr + 1); + rc = vmem_add_mapping(seg->start_addr, seg->end - seg->start_addr + 1, + PAGE_KERNEL); if (rc) goto out_free; diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index a0c88c1c9ad0..ef19522ddad2 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -277,7 +277,7 @@ int arch_add_memory(int nid, u64 start, u64 size, if (WARN_ON_ONCE(modifiers->altmap)) return -EINVAL; - rc = vmem_add_mapping(start, size); + rc = vmem_add_mapping(start, size, PAGE_KERNEL); if (rc) return rc; diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index b403fa14847d..8a5e95f184a2 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -66,7 +66,7 @@ pte_t __ref *vmem_pte_alloc(void) /* * Add a physical memory range to the 1:1 mapping. */ -static int vmem_add_mem(unsigned long start, unsigned long size) +static int vmem_add_mem(unsigned long start, unsigned long size, pgprot_t prot) { unsigned long pgt_prot, sgt_prot, r3_prot; unsigned long pages4k, pages1m, pages2g; @@ -79,7 +79,7 @@ static int vmem_add_mem(unsigned long start, unsigned long size) pte_t *pt_dir; int ret = -ENOMEM; - pgt_prot = pgprot_val(PAGE_KERNEL); + pgt_prot = pgprot_val(prot); sgt_prot = pgprot_val(SEGMENT_KERNEL); r3_prot = pgprot_val(REGION3_KERNEL); if (!MACHINE_HAS_NX) { @@ -362,7 +362,7 @@ int vmem_remove_mapping(unsigned long start, unsigned long size) return ret; } -int vmem_add_mapping(unsigned long start, unsigned long size) +int vmem_add_mapping(unsigned long start, unsigned long size, pgprot_t prot) { struct memory_segment *seg; int ret; @@ -379,7 +379,7 @@ int vmem_add_mapping(unsigned long start, unsigned long size) if (ret) goto out_free; - ret = vmem_add_mem(start, size); + ret = vmem_add_mem(start, size, prot); if (ret) goto out_remove; goto out; @@ -403,7 +403,7 @@ void __init vmem_map_init(void) struct memblock_region *reg; for_each_memblock(memory, reg) - vmem_add_mem(reg->base, reg->size); + vmem_add_mem(reg->base, reg->size, PAGE_KERNEL); __set_memory((unsigned long)_stext, (unsigned long)(_etext - _stext) >> PAGE_SHIFT, SET_MEMORY_RO | SET_MEMORY_X); From patchwork Tue Jan 7 20:59:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 11321877 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B43D8109A for ; Tue, 7 Jan 2020 21:25:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 927DF206F0 for ; Tue, 7 Jan 2020 21:25:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728901AbgAGVYz (ORCPT ); Tue, 7 Jan 2020 16:24:55 -0500 Received: from ale.deltatee.com ([207.54.116.67]:51286 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727591AbgAGVAR (ORCPT ); Tue, 7 Jan 2020 16:00:17 -0500 Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1iovxP-0007vw-0F; Tue, 07 Jan 2020 14:00:10 -0700 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.92) (envelope-from ) id 1iovxJ-0001zM-5J; Tue, 07 Jan 2020 14:00:01 -0700 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, Dan Williams , Michal Hocko , David Hildenbrand , Andrew Morton Cc: Christoph Hellwig , Catalin Marinas , Will Deacon , Benjamin Herrenschmidt , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Eric Badger , Logan Gunthorpe , Michal Hocko Date: Tue, 7 Jan 2020 13:59:58 -0700 Message-Id: <20200107205959.7575-8-logang@deltatee.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200107205959.7575-1-logang@deltatee.com> References: <20200107205959.7575-1-logang@deltatee.com> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, dan.j.williams@intel.com, akpm@linux-foundation.org, hch@lst.de, catalin.marinas@arm.com, benh@kernel.crashing.org, tglx@linutronix.de, david@redhat.com, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, mhocko@kernel.org, will@kernel.org, luto@kernel.org, peterz@infradead.org, ebadger@gigaio.com, logang@deltatee.com, mhocko@suse.com X-SA-Exim-Mail-From: gunthorp@deltatee.com X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on ale.deltatee.com X-Spam-Level: X-Spam-Status: No, score=-8.7 required=5.0 tests=ALL_TRUSTED,BAYES_00, GREYLIST_ISWHITE,MYRULES_NO_TEXT autolearn=ham autolearn_force=no version=3.4.2 Subject: [PATCH v2 7/8] mm/memory_hotplug: Add pgprot_t to mhp_modifiers X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org devm_memremap_pages() is currently used by the PCI P2PDMA code to create struct page mappings for IO memory. At present, these mappings are created with PAGE_KERNEL which implies setting the PAT bits to be WB. However, on x86, an mtrr register will typically override this and force the cache type to be UC-. In the case firmware doesn't set this register it is effectively WB and will typically result in a machine check exception when it's accessed. Other arches are not currently likely to function correctly seeing they don't have any MTRR registers to fall back on. To solve this, add an argument to arch_add_memory() to explicitly set the pgprot value to a specific value. Of the arches that support MEMORY_HOTPLUG: x86_64, s390 and arm64 is a simple change to pass the pgprot_t down to their respective functions which set up the page tables. For x86_32, set the page tables explicitly using _set_memory_prot() (seeing they are already mapped). For sh, reject anything but PAGE_KERNEL settings -- this should be fine, for now, seeing sh doesn't support ZONE_DEVICE anyway. Cc: Dan Williams Cc: David Hildenbrand Cc: Michal Hocko Signed-off-by: Logan Gunthorpe Acked-by: David Hildenbrand Acked-by: Michal Hocko --- arch/arm64/mm/mmu.c | 3 ++- arch/ia64/mm/init.c | 4 ++++ arch/powerpc/mm/mem.c | 3 ++- arch/s390/mm/init.c | 2 +- arch/sh/mm/init.c | 3 +++ arch/x86/mm/init_32.c | 5 +++++ arch/x86/mm/init_64.c | 2 +- include/linux/memory_hotplug.h | 2 ++ mm/memory_hotplug.c | 2 +- mm/memremap.c | 6 +++--- 10 files changed, 24 insertions(+), 8 deletions(-) diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 3320406579c3..9b214b0d268f 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -1058,7 +1058,8 @@ int arch_add_memory(int nid, u64 start, u64 size, flags = NO_BLOCK_MAPPINGS | NO_CONT_MAPPINGS; __create_pgd_mapping(swapper_pg_dir, start, __phys_to_virt(start), - size, PAGE_KERNEL, __pgd_pgtable_alloc, flags); + size, modifiers->pgprot, __pgd_pgtable_alloc, + flags); memblock_clear_nomap(start, size); diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c index daf438e08b96..5fd6ae4929c9 100644 --- a/arch/ia64/mm/init.c +++ b/arch/ia64/mm/init.c @@ -677,6 +677,10 @@ int arch_add_memory(int nid, u64 start, u64 size, int ret; ret = __add_pages(nid, start_pfn, nr_pages, modifiers); + if (modifiers->pgprot != PAGE_KERNEL) + return -EINVAL; + + ret = __add_pages(nid, start_pfn, nr_pages, restrictions); if (ret) printk("%s: Problem encountered in __add_pages() as ret=%d\n", __func__, ret); diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 631ee684721f..fddeaee53198 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -137,7 +137,8 @@ int __ref arch_add_memory(int nid, u64 start, u64 size, resize_hpt_for_hotplug(memblock_phys_mem_size()); start = (unsigned long)__va(start); - rc = create_section_mapping(start, start + size, nid, PAGE_KERNEL); + rc = create_section_mapping(start, start + size, nid, + modifiers->pgprot); if (rc) { pr_warn("Unable to create mapping for hot added memory 0x%llx..0x%llx: %d\n", start, start + size, rc); diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index ef19522ddad2..c65fb33f6a89 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -277,7 +277,7 @@ int arch_add_memory(int nid, u64 start, u64 size, if (WARN_ON_ONCE(modifiers->altmap)) return -EINVAL; - rc = vmem_add_mapping(start, size, PAGE_KERNEL); + rc = vmem_add_mapping(start, size, modifiers->pgprot); if (rc) return rc; diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index 7e64f42fb570..7071dc5bd2e4 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -412,6 +412,9 @@ int arch_add_memory(int nid, u64 start, u64 size, unsigned long nr_pages = size >> PAGE_SHIFT; int ret; + if (modifiers->pgprot != PAGE_KERNEL) + return -EINVAL; + /* We only have ZONE_NORMAL, so this is easy.. */ ret = __add_pages(nid, start_pfn, nr_pages, modifiers); if (unlikely(ret)) diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index 630d8a36fcd7..737da0dbc0d5 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -857,6 +857,11 @@ int arch_add_memory(int nid, u64 start, u64 size, { unsigned long start_pfn = start >> PAGE_SHIFT; unsigned long nr_pages = size >> PAGE_SHIFT; + int ret; + + ret = _set_memory_prot(start, nr_pages, modifiers->pgprot); + if (ret) + return ret; return __add_pages(nid, start_pfn, nr_pages, modifiers); } diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 17ea0bfc0b83..cc9eb45ad120 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -868,7 +868,7 @@ int arch_add_memory(int nid, u64 start, u64 size, unsigned long start_pfn = start >> PAGE_SHIFT; unsigned long nr_pages = size >> PAGE_SHIFT; - init_memory_mapping(start, start + size, PAGE_KERNEL); + init_memory_mapping(start, start + size, modifiers->pgprot); return add_pages(nid, start_pfn, nr_pages, modifiers); } diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index 2152efae2f4b..00dfb2016737 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -56,9 +56,11 @@ enum { /* * Restrictions for the memory hotplug: * altmap: alternative allocator for memmap array + * pgprot: page protection flags to apply to newly added page tables */ struct mhp_modifiers { struct vmem_altmap *altmap; + pgprot_t pgprot; }; /* diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 1bb3f92e087d..0888f821af06 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -1027,7 +1027,7 @@ static int online_memory_block(struct memory_block *mem, void *arg) */ int __ref add_memory_resource(int nid, struct resource *res) { - struct mhp_modifiers modifiers = {}; + struct mhp_modifiers modifiers = {.pgprot = PAGE_KERNEL}; u64 start, size; bool new_node = false; int ret; diff --git a/mm/memremap.c b/mm/memremap.c index e30be8ba706b..45ab4ef0643d 100644 --- a/mm/memremap.c +++ b/mm/memremap.c @@ -163,8 +163,8 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid) * We do not want any optional features only our own memmap */ .altmap = pgmap_altmap(pgmap), + .pgprot = PAGE_KERNEL, }; - pgprot_t pgprot = PAGE_KERNEL; int error, is_ram; bool need_devmap_managed = true; @@ -252,8 +252,8 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid) if (nid < 0) nid = numa_mem_id(); - error = track_pfn_remap(NULL, &pgprot, PHYS_PFN(res->start), 0, - resource_size(res)); + error = track_pfn_remap(NULL, &modifiers.pgprot, PHYS_PFN(res->start), + 0, resource_size(res)); if (error) goto err_pfn_remap; From patchwork Tue Jan 7 20:59:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 11321887 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7861A13A0 for ; Tue, 7 Jan 2020 21:25:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5D583206F0 for ; Tue, 7 Jan 2020 21:25:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727826AbgAGVZE (ORCPT ); Tue, 7 Jan 2020 16:25:04 -0500 Received: from ale.deltatee.com ([207.54.116.67]:51280 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727257AbgAGVAQ (ORCPT ); Tue, 7 Jan 2020 16:00:16 -0500 Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1iovxO-0007vy-Fh; Tue, 07 Jan 2020 14:00:09 -0700 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.92) (envelope-from ) id 1iovxJ-0001zP-94; Tue, 07 Jan 2020 14:00:01 -0700 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, Dan Williams , Michal Hocko , David Hildenbrand , Andrew Morton Cc: Christoph Hellwig , Catalin Marinas , Will Deacon , Benjamin Herrenschmidt , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Eric Badger , Logan Gunthorpe , Jason Gunthorpe Date: Tue, 7 Jan 2020 13:59:59 -0700 Message-Id: <20200107205959.7575-9-logang@deltatee.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200107205959.7575-1-logang@deltatee.com> References: <20200107205959.7575-1-logang@deltatee.com> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, dan.j.williams@intel.com, akpm@linux-foundation.org, hch@lst.de, catalin.marinas@arm.com, benh@kernel.crashing.org, tglx@linutronix.de, david@redhat.com, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, mhocko@kernel.org, will@kernel.org, luto@kernel.org, peterz@infradead.org, ebadger@gigaio.com, logang@deltatee.com, jgg@ziepe.ca X-SA-Exim-Mail-From: gunthorp@deltatee.com X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on ale.deltatee.com X-Spam-Level: X-Spam-Status: No, score=-8.7 required=5.0 tests=ALL_TRUSTED,BAYES_00, GREYLIST_ISWHITE,MYRULES_NO_TEXT autolearn=ham autolearn_force=no version=3.4.2 Subject: [PATCH v2 8/8] mm/memremap: Set caching mode for PCI P2PDMA memory to WC X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org PCI BAR IO memory should never be mapped as WB, however prior to this the PAT bits were set WB and it was typically overridden by MTRR registers set by the firmware. Set PCI P2PDMA memory to be WC (writecombining) as the only current user (the NVMe CMB) was originally mapped WC before the P2PDMA code replaced the mapping with devm_memremap_pages(). Future use-cases may need to generalize this by adding flags to select the caching type, as some P2PDMA cases will not want WC. However, those use-cases are not upstream yet and this can be changed when they arrive. Cc: Dan Williams Cc: Christoph Hellwig Cc: Jason Gunthorpe Signed-off-by: Logan Gunthorpe --- mm/memremap.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/memremap.c b/mm/memremap.c index 45ab4ef0643d..d36ff688b768 100644 --- a/mm/memremap.c +++ b/mm/memremap.c @@ -187,7 +187,10 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid) } break; case MEMORY_DEVICE_DEVDAX: + need_devmap_managed = false; + break; case MEMORY_DEVICE_PCI_P2PDMA: + modifiers.pgprot = pgprot_writecombine(modifiers.pgprot); need_devmap_managed = false; break; default: