From: Paul Walmsley <paul.walmsley@sifive.com>
To: Steven Price <steven.price@arm.com>, alex@ghiti.fr
Cc: linux-mm@kvack.org, "Mark Rutland" <Mark.Rutland@arm.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
linux-riscv@lists.infradead.org, "Will Deacon" <will@kernel.org>,
"Liang, Kan" <kan.liang@linux.intel.com>,
x86@kernel.org, "Ingo Molnar" <mingo@redhat.com>,
"Palmer Dabbelt" <palmer@sifive.com>,
"Albert Ou" <aou@eecs.berkeley.edu>,
"Arnd Bergmann" <arnd@arndb.de>,
"Jérôme Glisse" <jglisse@redhat.com>,
"Borislav Petkov" <bp@alien8.de>,
"Andy Lutomirski" <luto@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
linux-arm-kernel@lists.infradead.org,
"Ard Biesheuvel" <ard.biesheuvel@linaro.org>,
linux-kernel@vger.kernel.org, "James Morse" <james.morse@arm.com>,
"Andrew Morton" <akpm@linux-foundation.org>
Subject: Re: [PATCH v11 07/22] riscv: mm: Add p?d_leaf() definitions
Date: Tue, 8 Oct 2019 14:33:48 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.2.21.9999.1910081431310.11044@viisi.sifive.com> (raw)
In-Reply-To: <20191007153822.16518-8-steven.price@arm.com>
On Mon, 7 Oct 2019, Steven Price wrote:
> walk_page_range() is going to be allowed to walk page tables other than
> those of user space. For this it needs to know when it has reached a
> 'leaf' entry in the page tables. This information is provided by the
> p?d_leaf() functions/macros.
>
> For riscv a page is a leaf page when it has a read, write or execute bit
> set on it.
>
> CC: Palmer Dabbelt <palmer@sifive.com>
> CC: Albert Ou <aou@eecs.berkeley.edu>
> CC: linux-riscv@lists.infradead.org
> Signed-off-by: Steven Price <steven.price@arm.com>
Acked-by: Paul Walmsley <paul.walmsley@sifive.com> # for arch/riscv
Alex has a good point, but probably the right thing to do is to replace
the contents of the arch/riscv/mm/hugetlbpage.c p{u,m}d_huge() functions
with calls to Steven's new static inline functions.
- Paul
next prev parent reply other threads:[~2019-10-08 21:33 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-07 15:38 [PATCH v11 00/22] Generic page walk and ptdump Steven Price
2019-10-07 15:38 ` [PATCH v11 01/22] mm: Add generic p?d_leaf() macros Steven Price
2019-10-07 15:38 ` [PATCH v11 02/22] arc: mm: Add p?d_leaf() definitions Steven Price
2019-10-08 20:19 ` Vineet Gupta
2019-10-07 15:38 ` [PATCH v11 03/22] arm: " Steven Price
2019-10-07 15:38 ` [PATCH v11 04/22] arm64: " Steven Price
2019-10-07 15:38 ` [PATCH v11 05/22] mips: " Steven Price
2019-10-07 15:38 ` [PATCH v11 06/22] powerpc: " Steven Price
2019-10-07 15:38 ` [PATCH v11 07/22] riscv: " Steven Price
2019-10-08 11:31 ` Alex Ghiti
2019-10-08 21:33 ` Paul Walmsley [this message]
2019-10-09 10:55 ` Steven Price
2019-10-07 15:38 ` [PATCH v11 08/22] s390: " Steven Price
2019-10-07 15:38 ` [PATCH v11 09/22] sparc: " Steven Price
2019-10-07 15:38 ` [PATCH v11 10/22] x86: " Steven Price
2019-10-07 15:38 ` [PATCH v11 11/22] mm: pagewalk: Add p4d_entry() and pgd_entry() Steven Price
2019-10-07 15:38 ` [PATCH v11 12/22] mm: pagewalk: Allow walking without vma Steven Price
2019-10-07 15:38 ` [PATCH v11 13/22] mm: pagewalk: Add test_p?d callbacks Steven Price
2019-10-07 15:38 ` [PATCH v11 14/22] mm: pagewalk: Add 'depth' parameter to pte_hole Steven Price
2019-10-07 16:10 ` Jason Gunthorpe
2019-10-07 16:20 ` Steven Price
2019-10-07 18:11 ` Jason Gunthorpe
2019-10-09 11:00 ` Steven Price
2019-10-07 15:38 ` [PATCH v11 15/22] x86: mm: Point to struct seq_file from struct pg_state Steven Price
2019-10-07 15:38 ` [PATCH v11 16/22] x86: mm+efi: Convert ptdump_walk_pgd_level() to take a mm_struct Steven Price
2019-10-07 15:38 ` [PATCH v11 17/22] x86: mm: Convert ptdump_walk_pgd_level_debugfs() to take an mm_struct Steven Price
2019-10-07 15:38 ` [PATCH v11 18/22] x86: mm: Convert ptdump_walk_pgd_level_core() " Steven Price
2019-10-07 15:38 ` [PATCH v11 19/22] mm: Add generic ptdump Steven Price
2019-10-07 15:38 ` [PATCH v11 20/22] x86: mm: Convert dump_pagetables to use walk_page_range Steven Price
2019-10-07 15:38 ` [PATCH v11 21/22] arm64: mm: Convert mm/dump.c to use walk_page_range() Steven Price
2019-10-07 15:38 ` [PATCH v11 22/22] arm64: mm: Display non-present entries in ptdump Steven Price
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