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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 8B1D5C43461 for ; Sat, 17 Apr 2021 17:22:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7297C6109F for ; Sat, 17 Apr 2021 17:22:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236752AbhDQRWe (ORCPT ); Sat, 17 Apr 2021 13:22:34 -0400 Received: from relay11.mail.gandi.net ([217.70.178.231]:40829 "EHLO relay11.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236595AbhDQRWc (ORCPT ); Sat, 17 Apr 2021 13:22:32 -0400 Received: from debian.home (lfbn-lyo-1-457-219.w2-7.abo.wanadoo.fr [2.7.49.219]) (Authenticated sender: alex@ghiti.fr) by relay11.mail.gandi.net (Postfix) with ESMTPSA id 0A91C100004; Sat, 17 Apr 2021 17:22:00 +0000 (UTC) From: Alexandre Ghiti To: Jonathan Corbet , Paul Walmsley , Palmer Dabbelt , Albert Ou , Arnd Bergmann , Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , linux-doc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-mm@kvack.org Cc: Alexandre Ghiti Subject: [PATCH] riscv: Fix 32b kernel caused by 64b kernel mapping moving outside linear mapping Date: Sat, 17 Apr 2021 13:21:59 -0400 Message-Id: <20210417172159.32085-1-alex@ghiti.fr> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Fix multiple leftovers when moving the kernel mapping outside the linear mapping for 64b kernel that left the 32b kernel unusable. Fixes: 4b67f48da707 ("riscv: Move kernel mapping outside of linear mapping") Signed-off-by: Alexandre Ghiti --- arch/riscv/include/asm/page.h | 9 +++++++++ arch/riscv/include/asm/pgtable.h | 16 ++++++++++++---- arch/riscv/mm/init.c | 25 ++++++++++++++++++++++++- 3 files changed, 45 insertions(+), 5 deletions(-) diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h index 22cfb2be60dc..f64b61296c0c 100644 --- a/arch/riscv/include/asm/page.h +++ b/arch/riscv/include/asm/page.h @@ -90,15 +90,20 @@ typedef struct page *pgtable_t; #ifdef CONFIG_MMU extern unsigned long va_pa_offset; +#ifdef CONFIG_64BIT extern unsigned long va_kernel_pa_offset; +#endif extern unsigned long pfn_base; #define ARCH_PFN_OFFSET (pfn_base) #else #define va_pa_offset 0 +#ifdef CONFIG_64BIT #define va_kernel_pa_offset 0 +#endif #define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) #endif /* CONFIG_MMU */ +#ifdef CONFIG_64BIT extern unsigned long kernel_virt_addr; #define linear_mapping_pa_to_va(x) ((void *)((unsigned long)(x) + va_pa_offset)) @@ -112,6 +117,10 @@ extern unsigned long kernel_virt_addr; (_x < kernel_virt_addr) ? \ linear_mapping_va_to_pa(_x) : kernel_mapping_va_to_pa(_x); \ }) +#else +#define __pa_to_va_nodebug(x) ((void *)((unsigned long) (x) + va_pa_offset)) +#define __va_to_pa_nodebug(x) ((unsigned long)(x) - va_pa_offset) +#endif #ifdef CONFIG_DEBUG_VIRTUAL extern phys_addr_t __virt_to_phys(unsigned long x); diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 80e63a93e903..5afda75cc2c3 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -16,19 +16,27 @@ #else #define ADDRESS_SPACE_END (UL(-1)) -/* - * Leave 2GB for kernel and BPF at the end of the address space - */ + +#ifdef CONFIG_64BIT +/* Leave 2GB for kernel and BPF at the end of the address space */ #define KERNEL_LINK_ADDR (ADDRESS_SPACE_END - SZ_2G + 1) +#else +#define KERNEL_LINK_ADDR PAGE_OFFSET +#endif #define VMALLOC_SIZE (KERN_VIRT_SIZE >> 1) #define VMALLOC_END (PAGE_OFFSET - 1) #define VMALLOC_START (PAGE_OFFSET - VMALLOC_SIZE) -/* KASLR should leave at least 128MB for BPF after the kernel */ #define BPF_JIT_REGION_SIZE (SZ_128M) +#ifdef CONFIG_64BIT +/* KASLR should leave at least 128MB for BPF after the kernel */ #define BPF_JIT_REGION_START PFN_ALIGN((unsigned long)&_end) #define BPF_JIT_REGION_END (BPF_JIT_REGION_START + BPF_JIT_REGION_SIZE) +#else +#define BPF_JIT_REGION_START (PAGE_OFFSET - BPF_JIT_REGION_SIZE) +#define BPF_JIT_REGION_END (VMALLOC_END) +#endif /* Modules always live before the kernel */ #ifdef CONFIG_64BIT diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index 093f3a96ecfc..dc9b988e0778 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -91,8 +91,10 @@ static void print_vm_layout(void) (unsigned long)VMALLOC_END); print_mlm("lowmem", (unsigned long)PAGE_OFFSET, (unsigned long)high_memory); +#ifdef CONFIG_64BIT print_mlm("kernel", (unsigned long)KERNEL_LINK_ADDR, (unsigned long)ADDRESS_SPACE_END); +#endif } #else static void print_vm_layout(void) { } @@ -165,9 +167,11 @@ static struct pt_alloc_ops pt_ops; /* Offset between linear mapping virtual address and kernel load address */ unsigned long va_pa_offset; EXPORT_SYMBOL(va_pa_offset); +#ifdef CONFIG_64BIT /* Offset between kernel mapping virtual address and kernel load address */ unsigned long va_kernel_pa_offset; EXPORT_SYMBOL(va_kernel_pa_offset); +#endif unsigned long pfn_base; EXPORT_SYMBOL(pfn_base); @@ -410,7 +414,9 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa) load_sz = (uintptr_t)(&_end) - load_pa; va_pa_offset = PAGE_OFFSET - load_pa; +#ifdef CONFIG_64BIT va_kernel_pa_offset = kernel_virt_addr - load_pa; +#endif pfn_base = PFN_DOWN(load_pa); @@ -469,12 +475,16 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa) pa + PMD_SIZE, PMD_SIZE, PAGE_KERNEL); dtb_early_va = (void *)DTB_EARLY_BASE_VA + (dtb_pa & (PMD_SIZE - 1)); #else /* CONFIG_BUILTIN_DTB */ +#ifdef CONFIG_64BIT /* * __va can't be used since it would return a linear mapping address * whereas dtb_early_va will be used before setup_vm_final installs * the linear mapping. */ dtb_early_va = kernel_mapping_pa_to_va(dtb_pa); +#else + dtb_early_va = __va(dtb_pa); +#endif /* CONFIG_64BIT */ #endif /* CONFIG_BUILTIN_DTB */ #else #ifndef CONFIG_BUILTIN_DTB @@ -486,7 +496,11 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa) pa + PGDIR_SIZE, PGDIR_SIZE, PAGE_KERNEL); dtb_early_va = (void *)DTB_EARLY_BASE_VA + (dtb_pa & (PGDIR_SIZE - 1)); #else /* CONFIG_BUILTIN_DTB */ +#ifdef CONFIG_64BIT dtb_early_va = kernel_mapping_pa_to_va(dtb_pa); +#else + dtb_early_va = __va(dtb_pa); +#endif /* CONFIG_64BIT */ #endif /* CONFIG_BUILTIN_DTB */ #endif dtb_early_pa = dtb_pa; @@ -571,12 +585,21 @@ static void __init setup_vm_final(void) for (pa = start; pa < end; pa += map_size) { va = (uintptr_t)__va(pa); create_pgd_mapping(swapper_pg_dir, va, pa, - map_size, PAGE_KERNEL); + map_size, +#ifdef CONFIG_64BIT + PAGE_KERNEL +#else + PAGE_KERNEL_EXEC +#endif + ); + } } +#ifdef CONFIG_64BIT /* Map the kernel */ create_kernel_page_table(swapper_pg_dir, PMD_SIZE); +#endif /* Clear fixmap PTE and PMD mappings */ clear_fixmap(FIX_PTE); -- 2.20.1 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=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 4D029C433B4 for ; Sat, 17 Apr 2021 17:22:46 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 33F53610CB for ; 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Received: from relay11.mail.gandi.net ([217.70.178.231]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lXoe2-00A7am-CJ for linux-riscv@lists.infradead.org; Sat, 17 Apr 2021 17:22:15 +0000 Received: from debian.home (lfbn-lyo-1-457-219.w2-7.abo.wanadoo.fr [2.7.49.219]) (Authenticated sender: alex@ghiti.fr) by relay11.mail.gandi.net (Postfix) with ESMTPSA id 0A91C100004; Sat, 17 Apr 2021 17:22:00 +0000 (UTC) From: Alexandre Ghiti To: Jonathan Corbet , Paul Walmsley , Palmer Dabbelt , Albert Ou , Arnd Bergmann , Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , linux-doc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-mm@kvack.org Cc: Alexandre Ghiti Subject: [PATCH] riscv: Fix 32b kernel caused by 64b kernel mapping moving outside linear mapping Date: Sat, 17 Apr 2021 13:21:59 -0400 Message-Id: <20210417172159.32085-1-alex@ghiti.fr> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210417_102210_696953_7B8C0A08 X-CRM114-Status: GOOD ( 15.27 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Fix multiple leftovers when moving the kernel mapping outside the linear mapping for 64b kernel that left the 32b kernel unusable. Fixes: 4b67f48da707 ("riscv: Move kernel mapping outside of linear mapping") Signed-off-by: Alexandre Ghiti --- arch/riscv/include/asm/page.h | 9 +++++++++ arch/riscv/include/asm/pgtable.h | 16 ++++++++++++---- arch/riscv/mm/init.c | 25 ++++++++++++++++++++++++- 3 files changed, 45 insertions(+), 5 deletions(-) diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h index 22cfb2be60dc..f64b61296c0c 100644 --- a/arch/riscv/include/asm/page.h +++ b/arch/riscv/include/asm/page.h @@ -90,15 +90,20 @@ typedef struct page *pgtable_t; #ifdef CONFIG_MMU extern unsigned long va_pa_offset; +#ifdef CONFIG_64BIT extern unsigned long va_kernel_pa_offset; +#endif extern unsigned long pfn_base; #define ARCH_PFN_OFFSET (pfn_base) #else #define va_pa_offset 0 +#ifdef CONFIG_64BIT #define va_kernel_pa_offset 0 +#endif #define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) #endif /* CONFIG_MMU */ +#ifdef CONFIG_64BIT extern unsigned long kernel_virt_addr; #define linear_mapping_pa_to_va(x) ((void *)((unsigned long)(x) + va_pa_offset)) @@ -112,6 +117,10 @@ extern unsigned long kernel_virt_addr; (_x < kernel_virt_addr) ? \ linear_mapping_va_to_pa(_x) : kernel_mapping_va_to_pa(_x); \ }) +#else +#define __pa_to_va_nodebug(x) ((void *)((unsigned long) (x) + va_pa_offset)) +#define __va_to_pa_nodebug(x) ((unsigned long)(x) - va_pa_offset) +#endif #ifdef CONFIG_DEBUG_VIRTUAL extern phys_addr_t __virt_to_phys(unsigned long x); diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 80e63a93e903..5afda75cc2c3 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -16,19 +16,27 @@ #else #define ADDRESS_SPACE_END (UL(-1)) -/* - * Leave 2GB for kernel and BPF at the end of the address space - */ + +#ifdef CONFIG_64BIT +/* Leave 2GB for kernel and BPF at the end of the address space */ #define KERNEL_LINK_ADDR (ADDRESS_SPACE_END - SZ_2G + 1) +#else +#define KERNEL_LINK_ADDR PAGE_OFFSET +#endif #define VMALLOC_SIZE (KERN_VIRT_SIZE >> 1) #define VMALLOC_END (PAGE_OFFSET - 1) #define VMALLOC_START (PAGE_OFFSET - VMALLOC_SIZE) -/* KASLR should leave at least 128MB for BPF after the kernel */ #define BPF_JIT_REGION_SIZE (SZ_128M) +#ifdef CONFIG_64BIT +/* KASLR should leave at least 128MB for BPF after the kernel */ #define BPF_JIT_REGION_START PFN_ALIGN((unsigned long)&_end) #define BPF_JIT_REGION_END (BPF_JIT_REGION_START + BPF_JIT_REGION_SIZE) +#else +#define BPF_JIT_REGION_START (PAGE_OFFSET - BPF_JIT_REGION_SIZE) +#define BPF_JIT_REGION_END (VMALLOC_END) +#endif /* Modules always live before the kernel */ #ifdef CONFIG_64BIT diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index 093f3a96ecfc..dc9b988e0778 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -91,8 +91,10 @@ static void print_vm_layout(void) (unsigned long)VMALLOC_END); print_mlm("lowmem", (unsigned long)PAGE_OFFSET, (unsigned long)high_memory); +#ifdef CONFIG_64BIT print_mlm("kernel", (unsigned long)KERNEL_LINK_ADDR, (unsigned long)ADDRESS_SPACE_END); +#endif } #else static void print_vm_layout(void) { } @@ -165,9 +167,11 @@ static struct pt_alloc_ops pt_ops; /* Offset between linear mapping virtual address and kernel load address */ unsigned long va_pa_offset; EXPORT_SYMBOL(va_pa_offset); +#ifdef CONFIG_64BIT /* Offset between kernel mapping virtual address and kernel load address */ unsigned long va_kernel_pa_offset; EXPORT_SYMBOL(va_kernel_pa_offset); +#endif unsigned long pfn_base; EXPORT_SYMBOL(pfn_base); @@ -410,7 +414,9 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa) load_sz = (uintptr_t)(&_end) - load_pa; va_pa_offset = PAGE_OFFSET - load_pa; +#ifdef CONFIG_64BIT va_kernel_pa_offset = kernel_virt_addr - load_pa; +#endif pfn_base = PFN_DOWN(load_pa); @@ -469,12 +475,16 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa) pa + PMD_SIZE, PMD_SIZE, PAGE_KERNEL); dtb_early_va = (void *)DTB_EARLY_BASE_VA + (dtb_pa & (PMD_SIZE - 1)); #else /* CONFIG_BUILTIN_DTB */ +#ifdef CONFIG_64BIT /* * __va can't be used since it would return a linear mapping address * whereas dtb_early_va will be used before setup_vm_final installs * the linear mapping. */ dtb_early_va = kernel_mapping_pa_to_va(dtb_pa); +#else + dtb_early_va = __va(dtb_pa); +#endif /* CONFIG_64BIT */ #endif /* CONFIG_BUILTIN_DTB */ #else #ifndef CONFIG_BUILTIN_DTB @@ -486,7 +496,11 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa) pa + PGDIR_SIZE, PGDIR_SIZE, PAGE_KERNEL); dtb_early_va = (void *)DTB_EARLY_BASE_VA + (dtb_pa & (PGDIR_SIZE - 1)); #else /* CONFIG_BUILTIN_DTB */ +#ifdef CONFIG_64BIT dtb_early_va = kernel_mapping_pa_to_va(dtb_pa); +#else + dtb_early_va = __va(dtb_pa); +#endif /* CONFIG_64BIT */ #endif /* CONFIG_BUILTIN_DTB */ #endif dtb_early_pa = dtb_pa; @@ -571,12 +585,21 @@ static void __init setup_vm_final(void) for (pa = start; pa < end; pa += map_size) { va = (uintptr_t)__va(pa); create_pgd_mapping(swapper_pg_dir, va, pa, - map_size, PAGE_KERNEL); + map_size, +#ifdef CONFIG_64BIT + PAGE_KERNEL +#else + PAGE_KERNEL_EXEC +#endif + ); + } } +#ifdef CONFIG_64BIT /* Map the kernel */ create_kernel_page_table(swapper_pg_dir, PMD_SIZE); +#endif /* Clear fixmap PTE and PMD mappings */ clear_fixmap(FIX_PTE); -- 2.20.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv