From: Peter Xu <peterx@redhat.com>
To: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Cc: Brian Geffon <bgeffon@google.com>,
Pavel Emelyanov <xemul@virtuozzo.com>,
Mike Kravetz <mike.kravetz@oracle.com>,
David Hildenbrand <david@redhat.com>,
peterx@redhat.com, Martin Cracauer <cracauer@cons.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Mel Gorman <mgorman@suse.de>,
Bobby Powers <bobbypowers@gmail.com>,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
"Kirill A . Shutemov" <kirill@shutemov.name>,
Maya Gokhale <gokhale2@llnl.gov>,
Johannes Weiner <hannes@cmpxchg.org>,
Marty McFadden <mcfadden8@llnl.gov>,
Denis Plotnikov <dplotnikov@virtuozzo.com>,
Hugh Dickins <hughd@google.com>,
"Dr . David Alan Gilbert" <dgilbert@redhat.com>,
Jerome Glisse <jglisse@redhat.com>
Subject: [PATCH v6 09/19] userfaultfd: wp: add pmd_swp_*uffd_wp() helpers
Date: Thu, 20 Feb 2020 11:31:02 -0500 [thread overview]
Message-ID: <20200220163112.11409-10-peterx@redhat.com> (raw)
In-Reply-To: <20200220163112.11409-1-peterx@redhat.com>
Adding these missing helpers for uffd-wp operations with pmd
swap/migration entries.
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
arch/x86/include/asm/pgtable.h | 15 +++++++++++++++
include/asm-generic/pgtable_uffd.h | 15 +++++++++++++++
2 files changed, 30 insertions(+)
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 74f16d7e5b47..75a04ac97ef2 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -1427,6 +1427,21 @@ static inline pte_t pte_swp_clear_uffd_wp(pte_t pte)
{
return pte_clear_flags(pte, _PAGE_SWP_UFFD_WP);
}
+
+static inline pmd_t pmd_swp_mkuffd_wp(pmd_t pmd)
+{
+ return pmd_set_flags(pmd, _PAGE_SWP_UFFD_WP);
+}
+
+static inline int pmd_swp_uffd_wp(pmd_t pmd)
+{
+ return pmd_flags(pmd) & _PAGE_SWP_UFFD_WP;
+}
+
+static inline pmd_t pmd_swp_clear_uffd_wp(pmd_t pmd)
+{
+ return pmd_clear_flags(pmd, _PAGE_SWP_UFFD_WP);
+}
#endif /* CONFIG_HAVE_ARCH_USERFAULTFD_WP */
#define PKRU_AD_BIT 0x1
diff --git a/include/asm-generic/pgtable_uffd.h b/include/asm-generic/pgtable_uffd.h
index 643d1bf559c2..828966d4c281 100644
--- a/include/asm-generic/pgtable_uffd.h
+++ b/include/asm-generic/pgtable_uffd.h
@@ -46,6 +46,21 @@ static __always_inline pte_t pte_swp_clear_uffd_wp(pte_t pte)
{
return pte;
}
+
+static inline pmd_t pmd_swp_mkuffd_wp(pmd_t pmd)
+{
+ return pmd;
+}
+
+static inline int pmd_swp_uffd_wp(pmd_t pmd)
+{
+ return 0;
+}
+
+static inline pmd_t pmd_swp_clear_uffd_wp(pmd_t pmd)
+{
+ return pmd;
+}
#endif /* CONFIG_HAVE_ARCH_USERFAULTFD_WP */
#endif /* _ASM_GENERIC_PGTABLE_UFFD_H */
--
2.24.1
next prev parent reply other threads:[~2020-02-20 16:31 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-20 16:30 [PATCH v6 00/19] userfaultfd: write protection support Peter Xu
2020-02-20 16:30 ` [PATCH v6 01/19] userfaultfd: wp: add helper for writeprotect check Peter Xu
2020-02-20 16:30 ` [PATCH v6 02/19] userfaultfd: wp: hook userfault handler to write protection fault Peter Xu
2020-02-20 16:30 ` [PATCH v6 03/19] userfaultfd: wp: add WP pagetable tracking to x86 Peter Xu
2020-02-20 16:30 ` [PATCH v6 04/19] userfaultfd: wp: userfaultfd_pte/huge_pmd_wp() helpers Peter Xu
2020-02-20 16:30 ` [PATCH v6 05/19] userfaultfd: wp: add UFFDIO_COPY_MODE_WP Peter Xu
2020-02-20 16:30 ` [PATCH v6 06/19] mm: merge parameters for change_protection() Peter Xu
2020-02-20 16:31 ` [PATCH v6 07/19] userfaultfd: wp: apply _PAGE_UFFD_WP bit Peter Xu
2020-02-20 16:31 ` [PATCH v6 08/19] userfaultfd: wp: drop _PAGE_UFFD_WP properly when fork Peter Xu
2020-02-20 16:31 ` Peter Xu [this message]
2020-02-20 16:31 ` [PATCH v6 10/19] userfaultfd: wp: support swap and page migration Peter Xu
2020-02-20 16:31 ` [PATCH v6 11/19] khugepaged: skip collapse if uffd-wp detected Peter Xu
2020-02-20 16:31 ` [PATCH v6 12/19] userfaultfd: wp: support write protection for userfault vma range Peter Xu
2020-02-20 16:31 ` [PATCH v6 13/19] userfaultfd: wp: add the writeprotect API to userfaultfd ioctl Peter Xu
2020-02-20 16:31 ` [PATCH v6 14/19] userfaultfd: wp: enabled write protection in userfaultfd API Peter Xu
2020-02-20 16:31 ` [PATCH v6 15/19] userfaultfd: wp: don't wake up when doing write protect Peter Xu
2020-02-20 16:31 ` [PATCH v6 16/19] userfaultfd: wp: UFFDIO_REGISTER_MODE_WP documentation update Peter Xu
2020-02-20 16:31 ` [PATCH v6 17/19] userfaultfd: wp: declare _UFFDIO_WRITEPROTECT conditionally Peter Xu
2020-02-20 16:31 ` [PATCH v6 18/19] userfaultfd: selftests: refactor statistics Peter Xu
2020-02-20 16:31 ` [PATCH v6 19/19] userfaultfd: selftests: add write-protect test Peter Xu
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