From: Steven Price <steven.price@arm.com>
To: linux-mm@kvack.org
Cc: "Steven Price" <steven.price@arm.com>,
"Andy Lutomirski" <luto@kernel.org>,
"Ard Biesheuvel" <ard.biesheuvel@linaro.org>,
"Arnd Bergmann" <arnd@arndb.de>, "Borislav Petkov" <bp@alien8.de>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
"Ingo Molnar" <mingo@redhat.com>,
"James Morse" <james.morse@arm.com>,
"Jérôme Glisse" <jglisse@redhat.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Will Deacon" <will.deacon@arm.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
"Mark Rutland" <Mark.Rutland@arm.com>,
"Liang, Kan" <kan.liang@linux.intel.com>,
"Tony Luck" <tony.luck@intel.com>,
"Fenghua Yu" <fenghua.yu@intel.com>,
linux-ia64@vger.kernel.org
Subject: [PATCH v3 08/34] ia64: mm: Add p?d_large() definitions
Date: Wed, 27 Feb 2019 17:05:42 +0000 [thread overview]
Message-ID: <20190227170608.27963-9-steven.price@arm.com> (raw)
In-Reply-To: <20190227170608.27963-1-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 is provided by the
p?d_large() functions/macros.
For ia64 leaf entries are always at the lowest level, so implement
stubs returning 0.
CC: Tony Luck <tony.luck@intel.com>
CC: Fenghua Yu <fenghua.yu@intel.com>
CC: linux-ia64@vger.kernel.org
Signed-off-by: Steven Price <steven.price@arm.com>
---
arch/ia64/include/asm/pgtable.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/ia64/include/asm/pgtable.h b/arch/ia64/include/asm/pgtable.h
index b1e7468eb65a..84dda295391b 100644
--- a/arch/ia64/include/asm/pgtable.h
+++ b/arch/ia64/include/asm/pgtable.h
@@ -271,6 +271,7 @@ extern unsigned long VMALLOC_END;
#define pmd_none(pmd) (!pmd_val(pmd))
#define pmd_bad(pmd) (!ia64_phys_addr_valid(pmd_val(pmd)))
#define pmd_present(pmd) (pmd_val(pmd) != 0UL)
+#define pmd_large(pmd) (0)
#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0UL)
#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val(pmd) & _PFN_MASK))
#define pmd_page(pmd) virt_to_page((pmd_val(pmd) + PAGE_OFFSET))
@@ -278,6 +279,7 @@ extern unsigned long VMALLOC_END;
#define pud_none(pud) (!pud_val(pud))
#define pud_bad(pud) (!ia64_phys_addr_valid(pud_val(pud)))
#define pud_present(pud) (pud_val(pud) != 0UL)
+#define pud_large(pud) (0)
#define pud_clear(pudp) (pud_val(*(pudp)) = 0UL)
#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & _PFN_MASK))
#define pud_page(pud) virt_to_page((pud_val(pud) + PAGE_OFFSET))
@@ -286,6 +288,7 @@ extern unsigned long VMALLOC_END;
#define pgd_none(pgd) (!pgd_val(pgd))
#define pgd_bad(pgd) (!ia64_phys_addr_valid(pgd_val(pgd)))
#define pgd_present(pgd) (pgd_val(pgd) != 0UL)
+#define pgd_large(pgd) (0)
#define pgd_clear(pgdp) (pgd_val(*(pgdp)) = 0UL)
#define pgd_page_vaddr(pgd) ((unsigned long) __va(pgd_val(pgd) & _PFN_MASK))
#define pgd_page(pgd) virt_to_page((pgd_val(pgd) + PAGE_OFFSET))
--
2.20.1
next parent reply other threads:[~2019-02-27 17:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190227170608.27963-1-steven.price@arm.com>
2019-02-27 17:05 ` Steven Price [this message]
2019-03-01 21:57 ` [PATCH v3 08/34] ia64: mm: Add p?d_large() definitions Kirill A. Shutemov
2019-03-04 13:16 ` Steven Price
2019-03-04 19:06 ` Luck, Tony
2019-03-06 13:45 ` Steven Price
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