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Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1pX7fI-0018pA-LT; Tue, 28 Feb 2023 21:37:40 +0000 From: "Matthew Wilcox (Oracle)" To: linux-mm@kvack.org, linux-arch@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org, Huacai Chen , WANG Xuerui , loongarch@lists.linux.dev Subject: [PATCH v3 12/34] loongarch: Implement the new page table range API Date: Tue, 28 Feb 2023 21:37:15 +0000 Message-Id: <20230228213738.272178-13-willy@infradead.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20230228213738.272178-1-willy@infradead.org> References: <20230228213738.272178-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 7A9ECA000E X-Stat-Signature: wptofu9ar3eqsnuy8e53qhm4roe3sgqn X-Rspam-User: X-HE-Tag: 1677620263-652599 X-HE-Meta: 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 f/ye8Nm/ UAkTrIkIVlhF4Onxps0zOjd/PEtC9Ba9hUKVW4QWQsrXrEJGzqxwsjbHF4NRSzShXcqurMxgXfKiH41wv/73+kF8cdEvQEKzUhAOBhvxSqs0wPYrw8pzIhVDHKPCEXxLnlaH9M/IkOD7PPzzuuKxV6DWjrjgt9UqjzC1Qx0jvJxuW3zHcFF8Cx/KOl98PKYC9i47BOQeZyA/COB5q4MiS8RZNjadSVSVDlcPBUON6txq3BA8yuCSLe+R98dV0KxSxeqkj 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: Add set_ptes() and update_mmu_cache_range(). It would probably be more efficient to implement __update_tlb() by flushing the entire folio instead of calling it __update_tlb() N times, but I'll leave that for someone who understands the architecture better. Signed-off-by: Matthew Wilcox (Oracle) Cc: Huacai Chen Cc: WANG Xuerui Cc: loongarch@lists.linux.dev --- arch/loongarch/include/asm/cacheflush.h | 2 ++ arch/loongarch/include/asm/pgtable.h | 30 +++++++++++++++++++------ 2 files changed, 25 insertions(+), 7 deletions(-) diff --git a/arch/loongarch/include/asm/cacheflush.h b/arch/loongarch/include/asm/cacheflush.h index 0681788eb474..7907eb42bfbd 100644 --- a/arch/loongarch/include/asm/cacheflush.h +++ b/arch/loongarch/include/asm/cacheflush.h @@ -47,8 +47,10 @@ void local_flush_icache_range(unsigned long start, unsigned long end); #define flush_cache_vmap(start, end) do { } while (0) #define flush_cache_vunmap(start, end) do { } while (0) #define flush_icache_page(vma, page) do { } while (0) +#define flush_icache_pages(vma, page) do { } while (0) #define flush_icache_user_page(vma, page, addr, len) do { } while (0) #define flush_dcache_page(page) do { } while (0) +#define flush_dcache_folio(folio) do { } while (0) #define flush_dcache_mmap_lock(mapping) do { } while (0) #define flush_dcache_mmap_unlock(mapping) do { } while (0) diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/asm/pgtable.h index d28fb9dbec59..9154d317ffb4 100644 --- a/arch/loongarch/include/asm/pgtable.h +++ b/arch/loongarch/include/asm/pgtable.h @@ -334,12 +334,20 @@ static inline void set_pte(pte_t *ptep, pte_t pteval) } } -static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, - pte_t *ptep, pte_t pteval) -{ - set_pte(ptep, pteval); +static inline void set_ptes(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pte, unsigned int nr) +{ + for (;;) { + set_pte(ptep, pte); + if (--nr == 0) + break; + ptep++; + pte_val(pte) += 1 << _PFN_SHIFT; + } } +#define set_pte_at(mm, addr, ptep, pte) set_ptes(mm, addr, ptep, pte, 1) + static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { /* Preserve global status for the pair */ @@ -445,11 +453,19 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) extern void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t *ptep); -static inline void update_mmu_cache(struct vm_area_struct *vma, - unsigned long address, pte_t *ptep) +static inline void update_mmu_cache_range(struct vm_area_struct *vma, + unsigned long address, pte_t *ptep, unsigned int nr) { - __update_tlb(vma, address, ptep); + for (;;) { + __update_tlb(vma, address, ptep); + if (--nr == 0) + break; + address += PAGE_SIZE; + ptep++; + } } +#define update_mmu_cache(vma, addr, ptep) \ + update_mmu_cache_range(vma, addr, ptep, 1) #define __HAVE_ARCH_UPDATE_MMU_TLB #define update_mmu_tlb update_mmu_cache -- 2.39.1