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Tue, 27 Oct 2020 11:30:14 +0000 (UTC) Received: from aquarius.haifa.ibm.com (nesher1.haifa.il.ibm.com [195.110.40.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 98A5922265; Tue, 27 Oct 2020 11:30:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603798212; bh=961zp8YP3Ph/5e1cBGv3GfPpdUC5CFeOssQ/7iZPL6c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=t+LMUjw9gvdRwfg60hai+Dx7XrGks1N/SAxFmRmvRv4Cf0w5VJIiUrfQd4UOgc3TZ no57/TMTg+pUB5xAbGBf9AxLjF88mu0UIFOV1fJ0EEknHpithAt3B4XUdzJsemQzxj NPemjoEI236GUI0LwuZJ2NIKKXMZd3fPz0hCsUxk= From: Mike Rapoport To: Andrew Morton Cc: Alexey Dobriyan , Catalin Marinas , Geert Uytterhoeven , Greg Ungerer , John Paul Adrian Glaubitz , Jonathan Corbet , Matt Turner , Meelis Roos , Michael Schmitz , Mike Rapoport , Mike Rapoport , Russell King , Tony Luck , Vineet Gupta , Will Deacon , linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mm@kvack.org, linux-snps-arc@lists.infradead.org Subject: [PATCH 01/13] alpha: switch from DISCONTIGMEM to SPARSEMEM Date: Tue, 27 Oct 2020 13:29:43 +0200 Message-Id: <20201027112955.14157-2-rppt@kernel.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201027112955.14157-1-rppt@kernel.org> References: <20201027112955.14157-1-rppt@kernel.org> MIME-Version: 1.0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Mike Rapoport Enable SPARSEMEM support on alpha and deprecate DISCONTIGMEM. The required changes are mostly around moving duplicated definitions of page access and address conversion macros to a common place and making sure they are available for all memory models. The DISCONTINGMEM support is marked as BROKEN an will be removed in a couple of releases. Signed-off-by: Mike Rapoport --- arch/alpha/Kconfig | 8 ++++++++ arch/alpha/include/asm/mmzone.h | 14 ++------------ arch/alpha/include/asm/page.h | 7 ++++--- arch/alpha/include/asm/pgtable.h | 12 +++++------- arch/alpha/include/asm/sparsemem.h | 18 ++++++++++++++++++ arch/alpha/kernel/setup.c | 1 + 6 files changed, 38 insertions(+), 22 deletions(-) create mode 100644 arch/alpha/include/asm/sparsemem.h diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index d6e9fc7a7b19..aedf5c296f13 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -40,6 +40,7 @@ config ALPHA select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67 select MMU_GATHER_NO_RANGE select SET_FS + select SPARSEMEM_EXTREME if SPARSEMEM help The Alpha is a 64-bit general-purpose processor designed and marketed by the Digital Equipment Corporation of blessed memory, @@ -551,12 +552,19 @@ config NR_CPUS config ARCH_DISCONTIGMEM_ENABLE bool "Discontiguous Memory Support" + depends on BROKEN help Say Y to support efficient handling of discontiguous physical memory, for architectures which are either NUMA (Non-Uniform Memory Access) or have huge holes in the physical address space for other reasons. See for more. +config ARCH_SPARSEMEM_ENABLE + bool "Sparse Memory Support" + help + Say Y to support efficient handling of discontiguous physical memory, + for systems that have huge holes in the physical address space. + config NUMA bool "NUMA Support (EXPERIMENTAL)" depends on DISCONTIGMEM && BROKEN diff --git a/arch/alpha/include/asm/mmzone.h b/arch/alpha/include/asm/mmzone.h index 9b521c857436..86644604d977 100644 --- a/arch/alpha/include/asm/mmzone.h +++ b/arch/alpha/include/asm/mmzone.h @@ -6,6 +6,8 @@ #ifndef _ASM_MMZONE_H_ #define _ASM_MMZONE_H_ +#ifdef CONFIG_DISCONTIGMEM + #include /* @@ -45,8 +47,6 @@ PLAT_NODE_DATA_LOCALNR(unsigned long p, int n) } #endif -#ifdef CONFIG_DISCONTIGMEM - /* * Following are macros that each numa implementation must define. */ @@ -68,11 +68,6 @@ PLAT_NODE_DATA_LOCALNR(unsigned long p, int n) /* XXX: FIXME -- nyc */ #define kern_addr_valid(kaddr) (0) -#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) - -#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> 32)) -#define pte_pfn(pte) (pte_val(pte) >> 32) - #define mk_pte(page, pgprot) \ ({ \ pte_t pte; \ @@ -95,16 +90,11 @@ PLAT_NODE_DATA_LOCALNR(unsigned long p, int n) __xx; \ }) -#define page_to_pa(page) \ - (page_to_pfn(page) << PAGE_SHIFT) - #define pfn_to_nid(pfn) pa_to_nid(((u64)(pfn) << PAGE_SHIFT)) #define pfn_valid(pfn) \ (((pfn) - node_start_pfn(pfn_to_nid(pfn))) < \ node_spanned_pages(pfn_to_nid(pfn))) \ -#define virt_addr_valid(kaddr) pfn_valid((__pa(kaddr) >> PAGE_SHIFT)) - #endif /* CONFIG_DISCONTIGMEM */ #endif /* _ASM_MMZONE_H_ */ diff --git a/arch/alpha/include/asm/page.h b/arch/alpha/include/asm/page.h index e241bd88880f..268f99b4602b 100644 --- a/arch/alpha/include/asm/page.h +++ b/arch/alpha/include/asm/page.h @@ -83,12 +83,13 @@ typedef struct page *pgtable_t; #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET) #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) -#ifndef CONFIG_DISCONTIGMEM + #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) +#define virt_addr_valid(kaddr) pfn_valid((__pa(kaddr) >> PAGE_SHIFT)) +#ifdef CONFIG_FLATMEM #define pfn_valid(pfn) ((pfn) < max_mapnr) -#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) -#endif /* CONFIG_DISCONTIGMEM */ +#endif /* CONFIG_FLATMEM */ #include #include diff --git a/arch/alpha/include/asm/pgtable.h b/arch/alpha/include/asm/pgtable.h index 660b14ce1317..8d856c62e22a 100644 --- a/arch/alpha/include/asm/pgtable.h +++ b/arch/alpha/include/asm/pgtable.h @@ -203,10 +203,10 @@ extern unsigned long __zero_page(void); * Conversion functions: convert a page and protection to a page entry, * and a page entry and page directory to the page they refer to. */ -#ifndef CONFIG_DISCONTIGMEM -#define page_to_pa(page) (((page) - mem_map) << PAGE_SHIFT) - +#define page_to_pa(page) (page_to_pfn(page) << PAGE_SHIFT) #define pte_pfn(pte) (pte_val(pte) >> 32) + +#ifndef CONFIG_DISCONTIGMEM #define pte_page(pte) pfn_to_page(pte_pfn(pte)) #define mk_pte(page, pgprot) \ ({ \ @@ -236,10 +236,8 @@ pmd_page_vaddr(pmd_t pmd) return ((pmd_val(pmd) & _PFN_MASK) >> (32-PAGE_SHIFT)) + PAGE_OFFSET; } -#ifndef CONFIG_DISCONTIGMEM -#define pmd_page(pmd) (mem_map + ((pmd_val(pmd) & _PFN_MASK) >> 32)) -#define pud_page(pud) (mem_map + ((pud_val(pud) & _PFN_MASK) >> 32)) -#endif +#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> 32)) +#define pud_page(pud) (pfn_to_page(pud_val(pud) >> 32)) extern inline unsigned long pud_page_vaddr(pud_t pgd) { return PAGE_OFFSET + ((pud_val(pgd) & _PFN_MASK) >> (32-PAGE_SHIFT)); } diff --git a/arch/alpha/include/asm/sparsemem.h b/arch/alpha/include/asm/sparsemem.h new file mode 100644 index 000000000000..a0820fd2d4b1 --- /dev/null +++ b/arch/alpha/include/asm/sparsemem.h @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_ALPHA_SPARSEMEM_H +#define _ASM_ALPHA_SPARSEMEM_H + +#ifdef CONFIG_SPARSEMEM + +#define SECTION_SIZE_BITS 27 + +/* + * According to "Alpha Architecture Reference Manual" physical + * addresses are at most 48 bits. + * https://download.majix.org/dec/alpha_arch_ref.pdf + */ +#define MAX_PHYSMEM_BITS 48 + +#endif /* CONFIG_SPARSEMEM */ + +#endif /* _ASM_ALPHA_SPARSEMEM_H */ diff --git a/arch/alpha/kernel/setup.c b/arch/alpha/kernel/setup.c index 916e42d74a86..03dda3beb3bd 100644 --- a/arch/alpha/kernel/setup.c +++ b/arch/alpha/kernel/setup.c @@ -648,6 +648,7 @@ setup_arch(char **cmdline_p) /* Find our memory. */ setup_memory(kernel_end); memblock_set_bottom_up(true); + sparse_init(); /* First guess at cpu cache sizes. Do this before init_arch. */ determine_cpu_caches(cpu->type);