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Fri, 15 Dec 2023 14:16:54 +0800 Message-ID: Date: Fri, 15 Dec 2023 14:16:54 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/3] mm: HVO: introduce helper function to update and flush pgtable Content-Language: en-US To: Nanyong Sun , , , , , , CC: , , , References: <20231214073912.1938330-1-sunnanyong@huawei.com> <20231214073912.1938330-2-sunnanyong@huawei.com> From: Kefeng Wang In-Reply-To: <20231214073912.1938330-2-sunnanyong@huawei.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [10.174.177.243] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To dggpemm100001.china.huawei.com (7.185.36.93) X-Rspamd-Queue-Id: 26D261A000A X-Rspam-User: X-Rspamd-Server: rspam11 X-Stat-Signature: z6oubnxmytmr8a7q7oiwx9n633ioatyf X-HE-Tag: 1702621019-803334 X-HE-Meta: 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 XDg3CS6o 6ywUI3QPzWyMyC7UKyC/tad4r+Ao+nBp5My9LbUdrHKXvi6Wb+Ke11t3zJy2GMs910UF3WrkvfQEvPgbuNp2XubK8Bst70XJylxaKSJMYzj4elzmx2UNC5LyCKu1KnWqW5RH7d50kZ8zaV2TMUUe+nEQZNGq0hYr8XzNwasm29de6UcnI073OpRc1r/4t98PJG40D 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: List-Subscribe: List-Unsubscribe: On 2023/12/14 15:39, Nanyong Sun wrote: > Add pmd/pte update and tlb flush helper function to update page > table. This refactoring patch is designed to facilitate each > architecture to implement its own special logic in preparation > for the arm64 architecture to follow the necessary break-before-make > sequence when updating page tables. > > Signed-off-by: Nanyong Sun > --- > mm/hugetlb_vmemmap.c | 55 ++++++++++++++++++++++++++++++++++---------- > 1 file changed, 43 insertions(+), 12 deletions(-) > > diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c > index 87818ee7f01d..49e8b351def3 100644 > --- a/mm/hugetlb_vmemmap.c > +++ b/mm/hugetlb_vmemmap.c > @@ -45,6 +45,37 @@ struct vmemmap_remap_walk { > unsigned long flags; > }; > > +#ifndef vmemmap_update_pmd > +static inline void vmemmap_update_pmd(unsigned long start, > + pmd_t *pmd, pte_t *pgtable) pgtable -> ptep > +{ > + pmd_populate_kernel(&init_mm, pmd, pgtable); > +} > +#endif > + > +#ifndef vmemmap_update_pte > +static inline void vmemmap_update_pte(unsigned long addr, > + pte_t *pte, pte_t entry) pte -> ptep entry -> pte > +{ > + set_pte_at(&init_mm, addr, pte, entry); > +} > +#endif