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Peter Anvin" Subject: [PATCH v3 26/34] x86: Implement the new page table range API Date: Tue, 28 Feb 2023 21:37:29 +0000 Message-Id: <20230228213738.272178-27-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-Queue-Id: 072B5100009 X-Stat-Signature: 7n7wepe9ady33dtk4hkoonhhbiro9auz X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1677620283-243747 X-HE-Meta: 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 9Ih+bfc+ fL07sN+1tSleF1iYlhFzdPm0jqHUL8zcMfsCjTjbsNrfHcV3NKT71lHusrB1BLn9ob23LPPgVfBUIR/Xip9gU7l7MM/QzO1pxFg4AUMm1qW5TxbrssupldJrF44cKohgsPCgStK1aGgH6GxqcuvDg/y/jrrUQVYXFCT5+ZpzuCGxadStr6LMVcvnx830cPCqxjPTw4/yKNlIo3hsh0lzOinPeRQoz/AVsvilhXucpZqYG93xjRYNdwFDbqm3mX9ASX3k9cmUuTtWh8kyH/+bo3qnWaj7SfNgToQv2dJwJMA74/gS5cDiPgVvS5Bi7ZYAcql9d0kXsw5zqIrfMC+SkNBFY/S2AN63jpp6Rq3uUYzveA9Q= 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: Convert set_pte_at() into set_ptes() and add a noop update_mmu_cache_range(). Signed-off-by: Matthew Wilcox (Oracle) Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: x86@kernel.org Cc: "H. Peter Anvin" --- arch/x86/include/asm/pgtable.h | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 84be3e07b112..f424371ea143 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -1019,13 +1019,22 @@ static inline pud_t native_local_pudp_get_and_clear(pud_t *pudp) return res; } -static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, - pte_t *ptep, pte_t pte) +static inline void set_ptes(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pte, unsigned int nr) { - page_table_check_ptes_set(mm, addr, ptep, pte, 1); - set_pte(ptep, pte); + page_table_check_ptes_set(mm, addr, ptep, pte, nr); + + for (;;) { + set_pte(ptep, pte); + if (--nr == 0) + break; + ptep++; + pte = __pte(pte_val(pte) + PAGE_SIZE); + } } +#define set_pte_at(mm, addr, ptep, pte) set_ptes(mm, addr, ptep, pte, 1) + static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp, pmd_t pmd) { @@ -1291,6 +1300,10 @@ static inline void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) { } +static inline void update_mmu_cache_range(struct vm_area_struct *vma, + unsigned long addr, pte_t *ptep, unsigned int nr) +{ +} static inline void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr, pmd_t *pmd) { -- 2.39.1