[05/12] mm, riscv, arm64: Use common set_pte() function

Message ID	20240508191931.46060-6-alexghiti@rivosinc.com (mailing list archive)
State	New, archived
Headers	show Received: from mail-wm1-f54.google.com (mail-wm1-f54.google.com [209.85.128.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E5292130AC0 for <kvm@vger.kernel.org>; Wed, 8 May 2024 19:24:42 +0000 (UTC) From: Alexandre Ghiti <alexghiti@rivosinc.com> To: Ryan Roberts <ryan.roberts@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Alexander Potapenko <glider@google.com>, Marco Elver <elver@google.com>, Dmitry Vyukov <dvyukov@google.com>, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Ard Biesheuvel <ardb@kernel.org>, Anup Patel <anup@brainfault.org>, Atish Patra <atishp@atishpatra.org>, Andrey Ryabinin <ryabinin.a.a@gmail.com>, Andrey Konovalov <andreyknvl@gmail.com>, Vincenzo Frascino <vincenzo.frascino@arm.com>, Andrew Morton <akpm@linux-foundation.org>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-riscv@lists.infradead.org, linux-efi@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-mm@kvack.org Cc: Alexandre Ghiti <alexghiti@rivosinc.com> Subject: [PATCH 05/12] mm, riscv, arm64: Use common set_pte() function Date: Wed, 8 May 2024 21:19:24 +0200 Message-Id: <20240508191931.46060-6-alexghiti@rivosinc.com> In-Reply-To: <20240508191931.46060-1-alexghiti@rivosinc.com> References: <20240508191931.46060-1-alexghiti@rivosinc.com> Precedence: bulk MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	Make riscv use THP contpte support for arm64 \| expand [00/12] Make riscv use THP contpte support for arm64 [01/12] mm, arm64: Rename ARM64_CONTPTE to THP_CONTPTE [02/12] mm, riscv, arm64: Use common ptep_get() function [03/12] mm, riscv, arm64: Use common set_ptes() function [04/12] mm, riscv, arm64: Use common ptep_get_lockless() function [05/12] mm, riscv, arm64: Use common set_pte() function [06/12] mm, riscv, arm64: Use common pte_clear() function [07/12] mm, riscv, arm64: Use common ptep_get_and_clear() function [08/12] mm, riscv, arm64: Use common ptep_test_and_clear_young() function [09/12] mm, riscv, arm64: Use common ptep_clear_flush_young() function [10/12] mm, riscv, arm64: Use common ptep_set_access_flags() function [11/12] mm, riscv, arm64: Use common ptep_set_wrprotect()/wrprotect_ptes() functions [12/12] mm, riscv, arm64: Use common get_and_clear_full_ptes()/clear_full_ptes() functions

diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 8a0603257436..bb6210fb72c8 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -1432,20 +1432,8 @@ extern pte_t ptep_get(pte_t *ptep); extern pte_t ptep_get_lockless(pte_t *ptep); #define ptep_get_lockless ptep_get_lockless -static inline void set_pte(pte_t *ptep, pte_t pte) -{ - /* - * We don't have the mm or vaddr so cannot unfold contig entries (since - * it requires tlb maintenance). set_pte() is not used in core code, so - * this should never even be called. Regardless do our best to service - * any call and emit a warning if there is any attempt to set a pte on - * top of an existing contig range. - */ - pte_t orig_pte = __ptep_get(ptep); - - WARN_ON_ONCE(pte_valid_cont(orig_pte)); - __set_pte(ptep, pte_mknoncont(pte)); -} +extern void set_pte(pte_t *ptep, pte_t pte); +#define set_pte set_pte extern void set_ptes(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte, unsigned int nr); diff --git a/arch/riscv/include/asm/kfence.h b/arch/riscv/include/asm/kfence.h index f303fef8591c..36e9f638abf6 100644 --- a/arch/riscv/include/asm/kfence.h +++ b/arch/riscv/include/asm/kfence.h @@ -18,9 +18,9 @@ static inline bool kfence_protect_page(unsigned long addr, bool protect) pte_t *pte = virt_to_kpte(addr); if (protect) - set_pte(pte, __pte(pte_val(__ptep_get(pte)) & ~_PAGE_PRESENT)); + __set_pte(pte, __pte(pte_val(__ptep_get(pte)) & ~_PAGE_PRESENT)); else - set_pte(pte, __pte(pte_val(__ptep_get(pte)) | _PAGE_PRESENT)); + __set_pte(pte, __pte(pte_val(__ptep_get(pte)) | _PAGE_PRESENT)); flush_tlb_kernel_range(addr, addr + PAGE_SIZE); diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 62cad1b974f1..4f8f673787e7 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -539,7 +539,7 @@ static inline int pte_same(pte_t pte_a, pte_t pte_b) * a page table are directly modified. Thus, the following hook is * made available. */ -static inline void set_pte(pte_t *ptep, pte_t pteval) +static inline void __set_pte(pte_t *ptep, pte_t pteval) { WRITE_ONCE(*ptep, pteval); } @@ -551,7 +551,7 @@ static inline void __set_pte_at(struct mm_struct *mm, pte_t *ptep, pte_t pteval) if (pte_present(pteval) && pte_exec(pteval)) flush_icache_pte(mm, pteval); - set_pte(ptep, pteval); + __set_pte(ptep, pteval); } #define PFN_PTE_SHIFT _PAGE_PFN_SHIFT @@ -790,11 +790,14 @@ extern pte_t ptep_get_lockless(pte_t *ptep); extern void set_ptes(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pteval, unsigned int nr); #define set_ptes set_ptes +extern void set_pte(pte_t *ptep, pte_t pte); +#define set_pte set_pte #else /* CONFIG_THP_CONTPTE */ #define ptep_get __ptep_get #define set_ptes __set_ptes +#define set_pte __set_pte #endif /* CONFIG_THP_CONTPTE */ diff --git a/arch/riscv/kernel/efi.c b/arch/riscv/kernel/efi.c index 3d2a635c69ac..673eca7705ba 100644 --- a/arch/riscv/kernel/efi.c +++ b/arch/riscv/kernel/efi.c @@ -72,7 +72,7 @@ static int __init set_permissions(pte_t *ptep, unsigned long addr, void *data) val = pte_val(pte) & ~_PAGE_EXEC; pte = __pte(val); } - set_pte(ptep, pte); + __set_pte(ptep, pte); return 0; } diff --git a/arch/riscv/kernel/hibernate.c b/arch/riscv/kernel/hibernate.c index 671b686c0158..97ed3df7a308 100644 --- a/arch/riscv/kernel/hibernate.c +++ b/arch/riscv/kernel/hibernate.c @@ -186,7 +186,7 @@ static int temp_pgtable_map_pte(pmd_t *dst_pmdp, pmd_t *src_pmdp, unsigned long pte_t pte = READ_ONCE(*src_ptep); if (pte_present(pte)) - set_pte(dst_ptep, __pte(pte_val(pte) | pgprot_val(prot))); + __set_pte(dst_ptep, __pte(pte_val(pte) | pgprot_val(prot))); } while (dst_ptep++, src_ptep++, start += PAGE_SIZE, start < end); return 0; diff --git a/arch/riscv/kvm/mmu.c b/arch/riscv/kvm/mmu.c index 70c6cb3864d6..1ee6139d495f 100644 --- a/arch/riscv/kvm/mmu.c +++ b/arch/riscv/kvm/mmu.c @@ -155,7 +155,7 @@ static int gstage_set_pte(struct kvm *kvm, u32 level, next_ptep = kvm_mmu_memory_cache_alloc(pcache); if (!next_ptep) return -ENOMEM; - set_pte(ptep, pfn_pte(PFN_DOWN(__pa(next_ptep)), + __set_pte(ptep, pfn_pte(PFN_DOWN(__pa(next_ptep)), __pgprot(_PAGE_TABLE))); } else { if (gstage_pte_leaf(ptep)) @@ -167,7 +167,7 @@ static int gstage_set_pte(struct kvm *kvm, u32 level, ptep = &next_ptep[gstage_pte_index(addr, current_level)]; } - set_pte(ptep, *new_pte); + __set_pte(ptep, *new_pte); if (gstage_pte_leaf(ptep)) gstage_remote_tlb_flush(kvm, current_level, addr); @@ -251,7 +251,7 @@ static void gstage_op_pte(struct kvm *kvm, gpa_t addr, return; if (op == GSTAGE_OP_CLEAR) - set_pte(ptep, __pte(0)); + __set_pte(ptep, __pte(0)); for (i = 0; i < PTRS_PER_PTE; i++) gstage_op_pte(kvm, addr + i * next_page_size, &next_ptep[i], next_ptep_level, op); @@ -259,9 +259,9 @@ static void gstage_op_pte(struct kvm *kvm, gpa_t addr, put_page(virt_to_page(next_ptep)); } else { if (op == GSTAGE_OP_CLEAR) - set_pte(ptep, __pte(0)); + __set_pte(ptep, __pte(0)); else if (op == GSTAGE_OP_WP) - set_pte(ptep, __pte(pte_val(__ptep_get(ptep)) & ~_PAGE_WRITE)); + __set_pte(ptep, __pte(pte_val(__ptep_get(ptep)) & ~_PAGE_WRITE)); gstage_remote_tlb_flush(kvm, ptep_level, addr); } } diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index fe8e159394d8..bb5c6578204c 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -325,7 +325,7 @@ void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot) ptep = &fixmap_pte[pte_index(addr)]; if (pgprot_val(prot)) - set_pte(ptep, pfn_pte(phys >> PAGE_SHIFT, prot)); + __set_pte(ptep, pfn_pte(phys >> PAGE_SHIFT, prot)); else pte_clear(&init_mm, addr, ptep); local_flush_tlb_page(addr); diff --git a/arch/riscv/mm/kasan_init.c b/arch/riscv/mm/kasan_init.c index 381d61f42ab8..b5061cb3ce4d 100644 --- a/arch/riscv/mm/kasan_init.c +++ b/arch/riscv/mm/kasan_init.c @@ -41,7 +41,7 @@ static void __init kasan_populate_pte(pmd_t *pmd, unsigned long vaddr, unsigned do { if (pte_none(__ptep_get(ptep))) { phys_addr = memblock_phys_alloc(PAGE_SIZE, PAGE_SIZE); - set_pte(ptep, pfn_pte(PFN_DOWN(phys_addr), PAGE_KERNEL)); + __set_pte(ptep, pfn_pte(PFN_DOWN(phys_addr), PAGE_KERNEL)); memset(__va(phys_addr), KASAN_SHADOW_INIT, PAGE_SIZE); } } while (ptep++, vaddr += PAGE_SIZE, vaddr != end); @@ -327,8 +327,8 @@ asmlinkage void __init kasan_early_init(void) KASAN_SHADOW_END - (1UL << (64 - KASAN_SHADOW_SCALE_SHIFT))); for (i = 0; i < PTRS_PER_PTE; ++i) - set_pte(kasan_early_shadow_pte + i, - pfn_pte(virt_to_pfn(kasan_early_shadow_page), PAGE_KERNEL)); + __set_pte(kasan_early_shadow_pte + i, + pfn_pte(virt_to_pfn(kasan_early_shadow_page), PAGE_KERNEL)); for (i = 0; i < PTRS_PER_PMD; ++i) set_pmd(kasan_early_shadow_pmd + i, @@ -523,10 +523,10 @@ void __init kasan_init(void) kasan_mem_to_shadow((const void *)MODULES_VADDR + SZ_2G)); for (i = 0; i < PTRS_PER_PTE; i++) - set_pte(&kasan_early_shadow_pte[i], - mk_pte(virt_to_page(kasan_early_shadow_page), - __pgprot(_PAGE_PRESENT | _PAGE_READ | - _PAGE_ACCESSED))); + __set_pte(&kasan_early_shadow_pte[i], + mk_pte(virt_to_page(kasan_early_shadow_page), + __pgprot(_PAGE_PRESENT | _PAGE_READ | + _PAGE_ACCESSED))); memset(kasan_early_shadow_page, KASAN_SHADOW_INIT, PAGE_SIZE); init_task.kasan_depth = 0; diff --git a/arch/riscv/mm/pageattr.c b/arch/riscv/mm/pageattr.c index 98c9dc4b983c..d623e4fc11fc 100644 --- a/arch/riscv/mm/pageattr.c +++ b/arch/riscv/mm/pageattr.c @@ -71,7 +71,7 @@ static int pageattr_pte_entry(pte_t *pte, unsigned long addr, pte_t val = __ptep_get(pte); val = __pte(set_pageattr_masks(pte_val(val), walk)); - set_pte(pte, val); + __set_pte(pte, val); return 0; } @@ -121,7 +121,7 @@ static int __split_linear_mapping_pmd(pud_t *pudp, ptep_new = (pte_t *)page_address(pte_page); for (i = 0; i < PTRS_PER_PTE; ++i, ++ptep_new) - set_pte(ptep_new, pfn_pte(pfn + i, prot)); + __set_pte(ptep_new, pfn_pte(pfn + i, prot)); smp_wmb(); diff --git a/mm/contpte.c b/mm/contpte.c index 060e0bc1a2a3..543ae5b5a863 100644 --- a/mm/contpte.c +++ b/mm/contpte.c @@ -17,6 +17,7 @@ * - __pte_clear() * - __ptep_set_access_flags() * - __ptep_set_wrprotect() + * - __set_pte() * - pte_cont() * - arch_contpte_get_num_contig() * - pte_valid_cont() @@ -43,6 +44,7 @@ * - ptep_get() * - set_ptes() * - ptep_get_lockless() + * - set_pte() */ pte_t huge_ptep_get(pte_t *ptep) @@ -658,4 +660,20 @@ __always_inline pte_t ptep_get_lockless(pte_t *ptep) return contpte_ptep_get_lockless(ptep); } + +void set_pte(pte_t *ptep, pte_t pte) +{ + /* + * We don't have the mm or vaddr so cannot unfold contig entries (since + * it requires tlb maintenance). set_pte() is not used in core code, so + * this should never even be called. Regardless do our best to service + * any call and emit a warning if there is any attempt to set a pte on + * top of an existing contig range. + */ + pte_t orig_pte = __ptep_get(ptep); + + WARN_ON_ONCE(pte_valid_cont(orig_pte)); + __set_pte(ptep, pte_mknoncont(pte)); +} + #endif /* CONFIG_THP_CONTPTE */

[05/12] mm, riscv, arm64: Use common set_pte() function

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