From: Baolin Wang <baolin.wang@linux.alibaba.com> To: catalin.marinas@arm.com, will@kernel.org, mike.kravetz@oracle.com, akpm@linux-foundation.org Cc: songmuchun@bytedance.com, willy@infradead.org, anshuman.khandual@arm.com, christophe.leroy@csgroup.eu, baolin.wang@linux.alibaba.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 1/2] arm64/hugetlb: Use ptep_get() to get the pte value of a huge page Date: Tue, 10 May 2022 19:12:52 +0800 [thread overview] Message-ID: <6aabddaf4cae5ae2205c3a7df9b9e15dbd61b641.1652180088.git.baolin.wang@linux.alibaba.com> (raw) In-Reply-To: <cover.1652180088.git.baolin.wang@linux.alibaba.com> In-Reply-To: <cover.1652180088.git.baolin.wang@linux.alibaba.com> The original huge_ptep_get() on ARM64 is just a wrapper of ptep_get(), which will not take into account any contig-PTEs dirty and access bits. Meanwhile we will implement a new ARM64-specific huge_ptep_get() interface in following patch, which will take into account any contig-PTEs dirty and access bits and only be allowed to pass the head pte of a contig-PTE/PMD size page. Thus change to use ptep_get() to get the pte value of a huge page as a preparation. Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> --- arch/arm64/mm/hugetlbpage.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c index ca8e65c..be5e2f3 100644 --- a/arch/arm64/mm/hugetlbpage.c +++ b/arch/arm64/mm/hugetlbpage.c @@ -172,7 +172,7 @@ static pte_t get_clear_flush(struct mm_struct *mm, unsigned long pgsize, unsigned long ncontig) { - pte_t orig_pte = huge_ptep_get(ptep); + pte_t orig_pte = ptep_get(ptep); bool valid = pte_valid(orig_pte); unsigned long i, saddr = addr; @@ -385,7 +385,7 @@ pte_t huge_ptep_get_and_clear(struct mm_struct *mm, { int ncontig; size_t pgsize; - pte_t orig_pte = huge_ptep_get(ptep); + pte_t orig_pte = ptep_get(ptep); if (!pte_cont(orig_pte)) return ptep_get_and_clear(mm, addr, ptep); @@ -408,11 +408,11 @@ static int __cont_access_flags_changed(pte_t *ptep, pte_t pte, int ncontig) { int i; - if (pte_write(pte) != pte_write(huge_ptep_get(ptep))) + if (pte_write(pte) != pte_write(ptep_get(ptep))) return 1; for (i = 0; i < ncontig; i++) { - pte_t orig_pte = huge_ptep_get(ptep + i); + pte_t orig_pte = ptep_get(ptep + i); if (pte_dirty(pte) != pte_dirty(orig_pte)) return 1; -- 1.8.3.1
WARNING: multiple messages have this Message-ID (diff)
From: Baolin Wang <baolin.wang@linux.alibaba.com> To: catalin.marinas@arm.com, will@kernel.org, mike.kravetz@oracle.com, akpm@linux-foundation.org Cc: songmuchun@bytedance.com, willy@infradead.org, anshuman.khandual@arm.com, christophe.leroy@csgroup.eu, baolin.wang@linux.alibaba.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 1/2] arm64/hugetlb: Use ptep_get() to get the pte value of a huge page Date: Tue, 10 May 2022 19:12:52 +0800 [thread overview] Message-ID: <6aabddaf4cae5ae2205c3a7df9b9e15dbd61b641.1652180088.git.baolin.wang@linux.alibaba.com> (raw) In-Reply-To: <cover.1652180088.git.baolin.wang@linux.alibaba.com> In-Reply-To: <cover.1652180088.git.baolin.wang@linux.alibaba.com> The original huge_ptep_get() on ARM64 is just a wrapper of ptep_get(), which will not take into account any contig-PTEs dirty and access bits. Meanwhile we will implement a new ARM64-specific huge_ptep_get() interface in following patch, which will take into account any contig-PTEs dirty and access bits and only be allowed to pass the head pte of a contig-PTE/PMD size page. Thus change to use ptep_get() to get the pte value of a huge page as a preparation. Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> --- arch/arm64/mm/hugetlbpage.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c index ca8e65c..be5e2f3 100644 --- a/arch/arm64/mm/hugetlbpage.c +++ b/arch/arm64/mm/hugetlbpage.c @@ -172,7 +172,7 @@ static pte_t get_clear_flush(struct mm_struct *mm, unsigned long pgsize, unsigned long ncontig) { - pte_t orig_pte = huge_ptep_get(ptep); + pte_t orig_pte = ptep_get(ptep); bool valid = pte_valid(orig_pte); unsigned long i, saddr = addr; @@ -385,7 +385,7 @@ pte_t huge_ptep_get_and_clear(struct mm_struct *mm, { int ncontig; size_t pgsize; - pte_t orig_pte = huge_ptep_get(ptep); + pte_t orig_pte = ptep_get(ptep); if (!pte_cont(orig_pte)) return ptep_get_and_clear(mm, addr, ptep); @@ -408,11 +408,11 @@ static int __cont_access_flags_changed(pte_t *ptep, pte_t pte, int ncontig) { int i; - if (pte_write(pte) != pte_write(huge_ptep_get(ptep))) + if (pte_write(pte) != pte_write(ptep_get(ptep))) return 1; for (i = 0; i < ncontig; i++) { - pte_t orig_pte = huge_ptep_get(ptep + i); + pte_t orig_pte = ptep_get(ptep + i); if (pte_dirty(pte) != pte_dirty(orig_pte)) return 1; -- 1.8.3.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-05-10 11:13 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-05-10 11:12 [PATCH 0/2] Implement arm64 specific huge_ptep_get() Baolin Wang 2022-05-10 11:12 ` Baolin Wang 2022-05-10 11:12 ` Baolin Wang [this message] 2022-05-10 11:12 ` [PATCH 1/2] arm64/hugetlb: Use ptep_get() to get the pte value of a huge page Baolin Wang 2022-05-10 15:55 ` Muchun Song 2022-05-10 15:55 ` Muchun Song 2022-05-11 1:24 ` Baolin Wang 2022-05-11 1:24 ` Baolin Wang 2022-05-10 11:12 ` [PATCH 2/2] arm64/hugetlb: Implement arm64 specific huge_ptep_get() Baolin Wang 2022-05-10 11:12 ` Baolin Wang 2022-05-10 15:59 ` Muchun Song 2022-05-10 15:59 ` Muchun Song
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