From: Steven Price <steven.price@arm.com>
To: linux-mm@kvack.org
Cc: "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>, "Will Deacon" <will@kernel.org>,
"Liang, Kan" <kan.liang@linux.intel.com>,
x86@kernel.org, "Steven Price" <steven.price@arm.com>,
"Ingo Molnar" <mingo@redhat.com>,
linux-snps-arc@lists.infradead.org,
"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>,
"Vineet Gupta" <vgupta@synopsys.com>,
linux-kernel@vger.kernel.org, "James Morse" <james.morse@arm.com>,
"Andrew Morton" <akpm@linux-foundation.org>
Subject: [PATCH v14 02/22] arc: mm: Add p?d_leaf() definitions
Date: Mon, 28 Oct 2019 13:58:50 +0000 [thread overview]
Message-ID: <20191028135910.33253-3-steven.price@arm.com> (raw)
In-Reply-To: <20191028135910.33253-1-steven.price@arm.com>
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 will be provided by the
p?d_leaf() functions/macros.
For arc, we only have two levels, so only pmd_leaf() is needed.
CC: Vineet Gupta <vgupta@synopsys.com>
CC: linux-snps-arc@lists.infradead.org
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Steven Price <steven.price@arm.com>
---
arch/arc/include/asm/pgtable.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arc/include/asm/pgtable.h b/arch/arc/include/asm/pgtable.h
index 7addd0301c51..b4a0cf27ac1c 100644
--- a/arch/arc/include/asm/pgtable.h
+++ b/arch/arc/include/asm/pgtable.h
@@ -274,6 +274,7 @@ static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
#define pmd_none(x) (!pmd_val(x))
#define pmd_bad(x) ((pmd_val(x) & ~PAGE_MASK))
#define pmd_present(x) (pmd_val(x))
+#define pmd_leaf(x) (pmd_val(x) & _PAGE_HW_SZ)
#define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0)
#define pte_page(pte) pfn_to_page(pte_pfn(pte))
--
2.20.1
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parent reply other threads:[~2019-10-28 14:00 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20191028135910.33253-1-steven.price@arm.com>]
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