From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Matthew Wilcox (Oracle)" Subject: [PATCH 12/7] hexagon: Implement the new page table range API Date: Wed, 15 Feb 2023 00:04:45 +0000 Message-ID: <20230215000446.1655635-4-willy@infradead.org> References: <20230211033948.891959-1-willy@infradead.org> <20230215000446.1655635-1-willy@infradead.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=h2PRVkAtu8fd3a0bg//rUxs9QnW0skvYBe9Qcbzdifk=; b=DIExkwAi2tqpjSpQji7j9ZuyaX Ii2DX9beCKO5Ej7eEZrmu/UZfKbavuYWZDTHRdYta5L8QefNsL1a+IYkNgojROgRIdWGhermVt0uB VD/9aBb/kv6A2s8MKzfyTFd2TSqs1riYuIuKa/J1bZ2U+XQt5ajncQi65QWMsyFeR14P6w2rxxre+ VW9TGSzzeW0ve+xm4HaB6VpDKlHXXsYjZLwJM7AHQHDs7gOpk8eFe+I94/TuSt7UWuF2vNjvUM+JF TSjby/ePER0UuBe8DcS8eVg7BVR2nMNeq5nFiywKuRvDevMKgU+IttbK33DI4zBgijNgZY5kayMAK HdrwpRKA==; In-Reply-To: <20230215000446.1655635-1-willy@infradead.org> List-ID: Content-Type: text/plain; charset="us-ascii" To: linux-mm@kvack.org, Brian Cain , linux-hexagon@vger.kernel.org, linux-arch@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" Add set_ptes() and update_mmu_cache_range(). Signed-off-by: Matthew Wilcox (Oracle) --- arch/hexagon/include/asm/cacheflush.h | 7 +++++-- arch/hexagon/include/asm/pgtable.h | 16 ++++++++++++++-- 2 files changed, 19 insertions(+), 4 deletions(-) diff --git a/arch/hexagon/include/asm/cacheflush.h b/arch/hexagon/include/asm/cacheflush.h index 6eff0730e6ef..63ca314ede89 100644 --- a/arch/hexagon/include/asm/cacheflush.h +++ b/arch/hexagon/include/asm/cacheflush.h @@ -58,12 +58,15 @@ extern void flush_cache_all_hexagon(void); * clean the cache when the PTE is set. * */ -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) { /* generic_ptrace_pokedata doesn't wind up here, does it? */ } +#define update_mmu_cache(vma, addr, ptep) \ + update_mmu_cache_range(vma, addr, ptep, 1) + void copy_to_user_page(struct vm_area_struct *vma, struct page *page, unsigned long vaddr, void *dst, void *src, int len); #define copy_to_user_page copy_to_user_page diff --git a/arch/hexagon/include/asm/pgtable.h b/arch/hexagon/include/asm/pgtable.h index 59393613d086..f58f1d920769 100644 --- a/arch/hexagon/include/asm/pgtable.h +++ b/arch/hexagon/include/asm/pgtable.h @@ -346,12 +346,24 @@ static inline int pte_exec(pte_t pte) #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval)) /* - * set_pte_at - update page table and do whatever magic may be + * set_ptes - update page table and do whatever magic may be * necessary to make the underlying hardware/firmware take note. * * VM may require a virtual instruction to alert the MMU. */ -#define set_pte_at(mm, addr, ptep, pte) set_pte(ptep, pte) +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) += PAGE_SIZE; + } +} + +#define set_pte_at(mm, addr, ptep, pte) set_ptes(mm, addr, ptep, pte, 1) static inline unsigned long pmd_page_vaddr(pmd_t pmd) { -- 2.39.1