From patchwork Wed Oct 23 09:28:56 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Rapoport X-Patchwork-Id: 11206121 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 933E614E5 for ; Wed, 23 Oct 2019 09:30:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 680A1222BD for ; Wed, 23 Oct 2019 09:30:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571823021; bh=E0BDuoRZQeTjF4nz9E/q7biOG/ySIjksDw4YyyLV0BQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=pXKfc0FOfiEEykwYTN1/a60yyE4kH2SHqy5dCbP1VNo2nd1kNohWhCo8XpRqVHuB7 tPpVEl53Tr0hcZCQvQT0mezXEK6TlXqOWzMEZtsA7oEYf/C/u1T12MUTap3ueCpS46 RhJjLtxOmDTOkmPTR48uWouagrD8uzn33vLVkOHo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404017AbfJWJaU (ORCPT ); Wed, 23 Oct 2019 05:30:20 -0400 Received: from mail.kernel.org ([198.145.29.99]:40186 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403882AbfJWJaU (ORCPT ); Wed, 23 Oct 2019 05:30:20 -0400 Received: from aquarius.haifa.ibm.com (nesher1.haifa.il.ibm.com [195.110.40.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0918D222C4; Wed, 23 Oct 2019 09:30:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571823018; bh=E0BDuoRZQeTjF4nz9E/q7biOG/ySIjksDw4YyyLV0BQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bizNFJWhIpXFwg8AkisQsNtUGZfNxGa7zIUmFsyUuJiUvmogmpPctzAxQOqVou9XQ TdpW5C0MhpCVpS7D2M5ld+cZfC1HugWD4NKLWjFkYUMisgTs9DZ1cBbKis4j5x8KI4 e6gNdjKld8Nvwe7D2hEb8u4P9VVrlCjCskViTtH0= From: Mike Rapoport To: linux-mm@kvack.org Cc: Andrew Morton , Anton Ivanov , Arnd Bergmann , "David S. Miller" , Geert Uytterhoeven , Greentime Hu , Greg Ungerer , Helge Deller , "James E.J. Bottomley" , Jeff Dike , "Kirill A. Shutemov" , Linus Torvalds , Mark Salter , Matt Turner , Michal Simek , Richard Weinberger , Russell King , Sam Creasey , Vincent Chen , Vineet Gupta , Mike Rapoport , linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-c6x-dev@linux-c6x.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-parisc@vger.kernel.org, linux-um@lists.infradead.org, sparclinux@vger.kernel.org, Mike Rapoport Subject: [PATCH 07/12] nds32: use pgtable-nopmd instead of 4level-fixup Date: Wed, 23 Oct 2019 12:28:56 +0300 Message-Id: <1571822941-29776-8-git-send-email-rppt@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1571822941-29776-1-git-send-email-rppt@kernel.org> References: <1571822941-29776-1-git-send-email-rppt@kernel.org> Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org From: Mike Rapoport nds32 has only two-level page tables and can use pgtable-nopmd and folding of the upper layers. Replace usage of include/asm-generic/4level-fixup.h and explicit definition of __PAGETABLE_PMD_FOLDED in nds32 with include/asm-generic/pgtable-nopmd.h and adjust page table manipulation macros and functions accordingly. Signed-off-by: Mike Rapoport --- arch/nds32/include/asm/page.h | 3 --- arch/nds32/include/asm/pgalloc.h | 3 --- arch/nds32/include/asm/pgtable.h | 12 +----------- arch/nds32/include/asm/tlb.h | 1 - arch/nds32/kernel/pm.c | 4 +++- arch/nds32/mm/fault.c | 16 +++++++++++++--- arch/nds32/mm/init.c | 11 ++++++++--- arch/nds32/mm/mm-nds32.c | 6 +++++- arch/nds32/mm/proc.c | 26 +++++++++++++++++--------- 9 files changed, 47 insertions(+), 35 deletions(-) diff --git a/arch/nds32/include/asm/page.h b/arch/nds32/include/asm/page.h index 8feb1fa..86b3201 100644 --- a/arch/nds32/include/asm/page.h +++ b/arch/nds32/include/asm/page.h @@ -41,17 +41,14 @@ void clear_page(void *page); void copy_page(void *to, void *from); typedef unsigned long pte_t; -typedef unsigned long pmd_t; typedef unsigned long pgd_t; typedef unsigned long pgprot_t; #define pte_val(x) (x) -#define pmd_val(x) (x) #define pgd_val(x) (x) #define pgprot_val(x) (x) #define __pte(x) (x) -#define __pmd(x) (x) #define __pgd(x) (x) #define __pgprot(x) (x) diff --git a/arch/nds32/include/asm/pgalloc.h b/arch/nds32/include/asm/pgalloc.h index 37125e6..85c1173 100644 --- a/arch/nds32/include/asm/pgalloc.h +++ b/arch/nds32/include/asm/pgalloc.h @@ -15,9 +15,6 @@ /* * Since we have only two-level page tables, these are trivial */ -#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); }) -#define pmd_free(mm, pmd) do { } while (0) -#define pgd_populate(mm, pmd, pte) BUG() #define pmd_pgtable(pmd) pmd_page(pmd) extern pgd_t *pgd_alloc(struct mm_struct *mm); diff --git a/arch/nds32/include/asm/pgtable.h b/arch/nds32/include/asm/pgtable.h index 0588ec9..a80b9c6 100644 --- a/arch/nds32/include/asm/pgtable.h +++ b/arch/nds32/include/asm/pgtable.h @@ -4,8 +4,7 @@ #ifndef _ASMNDS32_PGTABLE_H #define _ASMNDS32_PGTABLE_H -#define __PAGETABLE_PMD_FOLDED 1 -#include +#include #include #include @@ -19,26 +18,20 @@ #ifdef CONFIG_ANDES_PAGE_SIZE_4KB #define PGDIR_SHIFT 22 #define PTRS_PER_PGD 1024 -#define PMD_SHIFT 22 -#define PTRS_PER_PMD 1 #define PTRS_PER_PTE 1024 #endif #ifdef CONFIG_ANDES_PAGE_SIZE_8KB #define PGDIR_SHIFT 24 #define PTRS_PER_PGD 256 -#define PMD_SHIFT 24 -#define PTRS_PER_PMD 1 #define PTRS_PER_PTE 2048 #endif #ifndef __ASSEMBLY__ extern void __pte_error(const char *file, int line, unsigned long val); -extern void __pmd_error(const char *file, int line, unsigned long val); extern void __pgd_error(const char *file, int line, unsigned long val); #define pte_ERROR(pte) __pte_error(__FILE__, __LINE__, pte_val(pte)) -#define pmd_ERROR(pmd) __pmd_error(__FILE__, __LINE__, pmd_val(pmd)) #define pgd_ERROR(pgd) __pgd_error(__FILE__, __LINE__, pgd_val(pgd)) #endif /* !__ASSEMBLY__ */ @@ -366,9 +359,6 @@ static inline pmd_t __mk_pmd(pte_t * ptep, unsigned long prot) /* to find an entry in a kernel page-table-directory */ #define pgd_offset_k(addr) pgd_offset(&init_mm, addr) -/* Find an entry in the second-level page table.. */ -#define pmd_offset(dir, addr) ((pmd_t *)(dir)) - static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) { const unsigned long mask = 0xfff; diff --git a/arch/nds32/include/asm/tlb.h b/arch/nds32/include/asm/tlb.h index a8aff1c..6726038 100644 --- a/arch/nds32/include/asm/tlb.h +++ b/arch/nds32/include/asm/tlb.h @@ -7,6 +7,5 @@ #include #define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, pte) -#define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tln)->mm, pmd) #endif diff --git a/arch/nds32/kernel/pm.c b/arch/nds32/kernel/pm.c index ffa8040..e25700e 100644 --- a/arch/nds32/kernel/pm.c +++ b/arch/nds32/kernel/pm.c @@ -14,6 +14,7 @@ unsigned int *phy_addr_sp_tmp; static void nds32_suspend2ram(void) { pgd_t *pgdv; + p4d_t *p4dv; pud_t *pudv; pmd_t *pmdv; pte_t *ptev; @@ -21,7 +22,8 @@ static void nds32_suspend2ram(void) pgdv = (pgd_t *)__va((__nds32__mfsr(NDS32_SR_L1_PPTB) & L1_PPTB_mskBASE)) + pgd_index((unsigned int)cpu_resume); - pudv = pud_offset(pgdv, (unsigned int)cpu_resume); + p4dv = p4d_offset(pgdv, (unsigned int)cpu_resume); + pudv = pud_offset(p4dv, (unsigned int)cpu_resume); pmdv = pmd_offset(pudv, (unsigned int)cpu_resume); ptev = pte_offset_map(pmdv, (unsigned int)cpu_resume); diff --git a/arch/nds32/mm/fault.c b/arch/nds32/mm/fault.c index 064ae5d..906dfb2 100644 --- a/arch/nds32/mm/fault.c +++ b/arch/nds32/mm/fault.c @@ -31,6 +31,8 @@ void show_pte(struct mm_struct *mm, unsigned long addr) pr_alert("[%08lx] *pgd=%08lx", addr, pgd_val(*pgd)); do { + p4d_t *p4d; + pud_t *pud; pmd_t *pmd; if (pgd_none(*pgd)) @@ -41,7 +43,9 @@ void show_pte(struct mm_struct *mm, unsigned long addr) break; } - pmd = pmd_offset(pgd, addr); + p4d = p4d_offset(pgd, addr); + pud = pud_offset(p4d, addr); + pmd = pmd_offset(pud, addr); #if PTRS_PER_PMD != 1 pr_alert(", *pmd=%08lx", pmd_val(*pmd)); #endif @@ -359,6 +363,7 @@ void do_page_fault(unsigned long entry, unsigned long addr, unsigned int index = pgd_index(addr); pgd_t *pgd, *pgd_k; + p4d_t *p4d, *p4d_k; pud_t *pud, *pud_k; pmd_t *pmd, *pmd_k; pte_t *pte_k; @@ -369,8 +374,13 @@ void do_page_fault(unsigned long entry, unsigned long addr, if (!pgd_present(*pgd_k)) goto no_context; - pud = pud_offset(pgd, addr); - pud_k = pud_offset(pgd_k, addr); + p4d = p4d_offset(pgd, addr); + p4d_k = p4d_offset(pgd_k, addr); + if (!p4d_present(*p4d_k)) + goto no_context; + + pud = pud_offset(p4d, addr); + pud_k = pud_offset(p4d_k, addr); if (!pud_present(*pud_k)) goto no_context; diff --git a/arch/nds32/mm/init.c b/arch/nds32/mm/init.c index 55703b0..0be3833f 100644 --- a/arch/nds32/mm/init.c +++ b/arch/nds32/mm/init.c @@ -54,6 +54,7 @@ static void __init map_ram(void) { unsigned long v, p, e; pgd_t *pge; + p4d_t *p4e; pud_t *pue; pmd_t *pme; pte_t *pte; @@ -69,7 +70,8 @@ static void __init map_ram(void) while (p < e) { int j; - pue = pud_offset(pge, v); + p4e = p4d_offset(pge, v); + pue = pud_offset(p4e, v); pme = pmd_offset(pue, v); if ((u32) pue != (u32) pge || (u32) pme != (u32) pge) { @@ -100,6 +102,7 @@ static void __init fixedrange_init(void) { unsigned long vaddr; pgd_t *pgd; + p4d_t *p4d; pud_t *pud; pmd_t *pmd; #ifdef CONFIG_HIGHMEM @@ -111,7 +114,8 @@ static void __init fixedrange_init(void) */ vaddr = __fix_to_virt(__end_of_fixed_addresses - 1); pgd = swapper_pg_dir + pgd_index(vaddr); - pud = pud_offset(pgd, vaddr); + p4d = p4d_offset(pgd, vaddr); + pud = pud_offset(p4d, vaddr); pmd = pmd_offset(pud, vaddr); fixmap_pmd_p = memblock_alloc(PAGE_SIZE, PAGE_SIZE); if (!fixmap_pmd_p) @@ -126,7 +130,8 @@ static void __init fixedrange_init(void) vaddr = PKMAP_BASE; pgd = swapper_pg_dir + pgd_index(vaddr); - pud = pud_offset(pgd, vaddr); + p4d = p4d_offset(pgd, vaddr); + pud = pud_offset(p4d, vaddr); pmd = pmd_offset(pud, vaddr); pte = memblock_alloc(PAGE_SIZE, PAGE_SIZE); if (!pte) diff --git a/arch/nds32/mm/mm-nds32.c b/arch/nds32/mm/mm-nds32.c index 3b43798..8503bee 100644 --- a/arch/nds32/mm/mm-nds32.c +++ b/arch/nds32/mm/mm-nds32.c @@ -74,6 +74,8 @@ void setup_mm_for_reboot(char mode) { unsigned long pmdval; pgd_t *pgd; + p4d_t *p4d; + pud_t *pud; pmd_t *pmd; int i; @@ -84,7 +86,9 @@ void setup_mm_for_reboot(char mode) for (i = 0; i < USER_PTRS_PER_PGD; i++) { pmdval = (i << PGDIR_SHIFT); - pmd = pmd_offset(pgd + i, i << PGDIR_SHIFT); + p4d = p4d_offset(pgd, i << PGDIR_SHIFT); + pud = pud_offset(p4d, i << PGDIR_SHIFT); + pmd = pmd_offset(pud + i, i << PGDIR_SHIFT); set_pmd(pmd, __pmd(pmdval)); } } diff --git a/arch/nds32/mm/proc.c b/arch/nds32/mm/proc.c index ba80992..837ae77 100644 --- a/arch/nds32/mm/proc.c +++ b/arch/nds32/mm/proc.c @@ -16,10 +16,14 @@ extern struct cache_info L1_cache_info[2]; int va_kernel_present(unsigned long addr) { + p4d_t *p4d; + pud_t *pud; pmd_t *pmd; pte_t *ptep, pte; - pmd = pmd_offset(pgd_offset_k(addr), addr); + p4d = p4d_offset(pgd_offset_k(addr), addr); + pud = pud_offset(p4d, addr); + pmd = pmd_offset(pud, addr); if (!pmd_none(*pmd)) { ptep = pte_offset_map(pmd, addr); pte = *ptep; @@ -32,20 +36,24 @@ int va_kernel_present(unsigned long addr) pte_t va_present(struct mm_struct * mm, unsigned long addr) { pgd_t *pgd; + p4d_t *p4d; pud_t *pud; pmd_t *pmd; pte_t *ptep, pte; pgd = pgd_offset(mm, addr); if (!pgd_none(*pgd)) { - pud = pud_offset(pgd, addr); - if (!pud_none(*pud)) { - pmd = pmd_offset(pud, addr); - if (!pmd_none(*pmd)) { - ptep = pte_offset_map(pmd, addr); - pte = *ptep; - if (pte_present(pte)) - return pte; + p4d = p4d_offset(pgd, addr); + if (!p4d_none(*p4d)) { + pud = pud_offset(p4d, addr); + if (!pud_none(*pud)) { + pmd = pmd_offset(pud, addr); + if (!pmd_none(*pmd)) { + ptep = pte_offset_map(pmd, addr); + pte = *ptep; + if (pte_present(pte)) + return pte; + } } } }