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Peter Anvin" Subject: [PATCH v2 25/30] x86: Implement the new page table range API Date: Mon, 27 Feb 2023 17:57:36 +0000 Message-Id: <20230227175741.71216-26-willy@infradead.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20230227175741.71216-1-willy@infradead.org> References: <20230227175741.71216-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam03 X-Stat-Signature: zbxenbmjq1u4r79rfh69mc6inrhnjbto X-Rspamd-Queue-Id: 8603116001F X-HE-Tag: 1677520693-253880 X-HE-Meta: U2FsdGVkX1+QdR0HYJ2J8rzPuW9WMb1F5pdgRhOR5WGGwJCsDkId61TNKea5BC60u6mbPLGKlP50RkDCzMeuJIhuhrqf+wjLGGVr5FUl9yF9NiS+/MVKQB3VHGXOK4SyHK5aQOeQMd0/gjhRdP3hvGBF5yPH/LIDW7+VrUv3XYNjMSO2r8atToPEnIjL60EUPgjNbHIPA/MV998tdZkvb15O3NOpufnJUBeNyJK/io4FRfMv5k7iBmc0fXdV1yLfYoK4Dg4bmcEMPXsbJzpu8OwOCW86UgCmgRJs3xjG3qfHOqHHUIZNaegR3LALEvkC/XkMs3BTjxS/BzRHWD24X9TFpbuman1GzycjkqaYR3Noja5/ZN8yolWhLmeWsaTywb4X+Q0zLE+Berb22iVWRdVYofYKVgl4Qu3lXwBQckr3G4JC1wmL0XKuZnkZYr/J7f2WfbNsyxJxN/CX9mg11CLh7r3K2kLZhS6XN8tWDujaFb/5+yy/lU+b7gADu8pquYZnhmWs+wk0UJ+sKJvkDsbj8JQFa3zxIalm/SalEM/jk9cN8r9p/qKJTWmKOycLRQPLhM+EmLIisqiw5o/pxffx+PXP4AgV2WKRaQFBPvzz9hqTxJ0B+X45SG2ODIYZJkTdOpgpN5XVZSc1YO2SVJz2UQoWT9+qDU/Ig0t9uJyOuEpcq07c96rARczHUGcRChBTCkBFFw/4ohrRrhg8c4WpU1VVMiVnJeqVAbOvACXsoMKwY3NiUBwVs64mxHUPAsECLbcM1Wy5fyfeGIJKuRzqtJSxc1CxWoM41Kd+D3JRjQFgLsPomCmP16eTS710wmaIhglX29GrBaBpkqcqQDM6Z3njk3218S1P31g6Ym/ezwE3x9GDnALD9LxrP5TNDIWoCGHng4XTAIxGtqX99i36SRMbWpW6L4NnAdfP4+12qd2D9fYZAl2KImWjv/StXJ/naysP38BHqWWqQhm FsPf2tkC 5ttZAc63XxMolY1KbhBx/thki+57iwakgNxi5K2w3M5rWf6j8uu8Tvl6pztw8uisupnia/PmpfEVDqHqjiKKOZiyIVPHSnTtihviKrUix6t3PNUvo9LGTbvPM4xOKD99vVD4ZZCthxrdfliQWSQsze5sOiuIPnyFWrjn1DvaUdGJz4YdIEClVY6iIR4GAu463SB/rmF/dH7iHBGm7kkBoApyis/CL849GjhUMQzvq/EQ0GZNXE+JL7OYn5fm7mpCXxWVc5BHyyciXQmgpCVknBndTiySPsawyMqnyO6NpvYc9aoprDi02gas74i86jcS27cy8+GvANcY30bFa5Kx3qriNLNxuFjOss99YLIutUNe7FF0= 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