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From: Vineet Gupta <vgupta@kernel.org>
To: linux-snps-arc@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	Anshuman Khandual <anshuman.khandual@arm.com>,
	Mike Rapoport <rppt@kernel.org>, Vineet Gupta <vgupta@kernel.org>
Subject: [PATCH v2 07/19] ARC: mm: pmd_populate* to use the canonical set_pmd (and drop pmd_set)
Date: Thu, 12 Aug 2021 16:37:41 -0700	[thread overview]
Message-ID: <20210812233753.104217-8-vgupta@kernel.org> (raw)
In-Reply-To: <20210812233753.104217-1-vgupta@kernel.org>

Signed-off-by: Vineet Gupta <vgupta@kernel.org>
---
 arch/arc/include/asm/pgalloc.h | 14 ++++++++++----
 arch/arc/include/asm/pgtable.h |  6 ------
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/arch/arc/include/asm/pgalloc.h b/arch/arc/include/asm/pgalloc.h
index a32ca3104ced..408bc4b0842d 100644
--- a/arch/arc/include/asm/pgalloc.h
+++ b/arch/arc/include/asm/pgalloc.h
@@ -35,13 +35,19 @@
 static inline void
 pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
 {
-	pmd_set(pmd, pte);
+	/*
+	 * The cast to long below is OK in 32-bit PAE40 regime with long long pte
+	 * Despite "wider" pte, the pte table needs to be in non-PAE low memory
+	 * as all higher levels can only hold long pointers.
+	 *
+	 * The cast itself is needed given simplistic definition of set_pmd()
+	 */
+	set_pmd(pmd, __pmd((unsigned long)pte));
 }
 
-static inline void
-pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t ptep)
+static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte)
 {
-	pmd_set(pmd, (pte_t *) ptep);
+	set_pmd(pmd, __pmd((unsigned long)pte));
 }
 
 static inline int __get_order_pgd(void)
diff --git a/arch/arc/include/asm/pgtable.h b/arch/arc/include/asm/pgtable.h
index b054c14f8bf6..f762bacb2358 100644
--- a/arch/arc/include/asm/pgtable.h
+++ b/arch/arc/include/asm/pgtable.h
@@ -222,12 +222,6 @@ extern char empty_zero_page[PAGE_SIZE];
 /* find the logical addr (phy for ARC) of the Page Tbl ref by PMD entry */
 #define pmd_page_vaddr(pmd)	(pmd_val(pmd) & PAGE_MASK)
 
-/* In a 2 level sys, setup the PGD entry with PTE value */
-static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
-{
-	pmd_val(*pmdp) = (unsigned long)ptep;
-}
-
 #define pte_none(x)			(!pte_val(x))
 #define pte_present(x)			(pte_val(x) & _PAGE_PRESENT)
 #define pte_clear(mm, addr, ptep)	set_pte_at(mm, addr, ptep, __pte(0))
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Vineet Gupta <vgupta@kernel.org>
To: linux-snps-arc@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	Anshuman Khandual <anshuman.khandual@arm.com>,
	Mike Rapoport <rppt@kernel.org>, Vineet Gupta <vgupta@kernel.org>
Subject: [PATCH v2 07/19] ARC: mm: pmd_populate* to use the canonical set_pmd (and drop pmd_set)
Date: Thu, 12 Aug 2021 16:37:41 -0700	[thread overview]
Message-ID: <20210812233753.104217-8-vgupta@kernel.org> (raw)
In-Reply-To: <20210812233753.104217-1-vgupta@kernel.org>

Signed-off-by: Vineet Gupta <vgupta@kernel.org>
---
 arch/arc/include/asm/pgalloc.h | 14 ++++++++++----
 arch/arc/include/asm/pgtable.h |  6 ------
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/arch/arc/include/asm/pgalloc.h b/arch/arc/include/asm/pgalloc.h
index a32ca3104ced..408bc4b0842d 100644
--- a/arch/arc/include/asm/pgalloc.h
+++ b/arch/arc/include/asm/pgalloc.h
@@ -35,13 +35,19 @@
 static inline void
 pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
 {
-	pmd_set(pmd, pte);
+	/*
+	 * The cast to long below is OK in 32-bit PAE40 regime with long long pte
+	 * Despite "wider" pte, the pte table needs to be in non-PAE low memory
+	 * as all higher levels can only hold long pointers.
+	 *
+	 * The cast itself is needed given simplistic definition of set_pmd()
+	 */
+	set_pmd(pmd, __pmd((unsigned long)pte));
 }
 
-static inline void
-pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t ptep)
+static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte)
 {
-	pmd_set(pmd, (pte_t *) ptep);
+	set_pmd(pmd, __pmd((unsigned long)pte));
 }
 
 static inline int __get_order_pgd(void)
diff --git a/arch/arc/include/asm/pgtable.h b/arch/arc/include/asm/pgtable.h
index b054c14f8bf6..f762bacb2358 100644
--- a/arch/arc/include/asm/pgtable.h
+++ b/arch/arc/include/asm/pgtable.h
@@ -222,12 +222,6 @@ extern char empty_zero_page[PAGE_SIZE];
 /* find the logical addr (phy for ARC) of the Page Tbl ref by PMD entry */
 #define pmd_page_vaddr(pmd)	(pmd_val(pmd) & PAGE_MASK)
 
-/* In a 2 level sys, setup the PGD entry with PTE value */
-static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
-{
-	pmd_val(*pmdp) = (unsigned long)ptep;
-}
-
 #define pte_none(x)			(!pte_val(x))
 #define pte_present(x)			(pte_val(x) & _PAGE_PRESENT)
 #define pte_clear(mm, addr, ptep)	set_pte_at(mm, addr, ptep, __pte(0))
-- 
2.25.1


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  parent reply	other threads:[~2021-08-12 23:38 UTC|newest]

Thread overview: 72+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-12 23:37 [PATCH v2 00/19] ARC mm updates: support 3/4 levels and asm-generic/pgalloc Vineet Gupta
2021-08-12 23:37 ` Vineet Gupta
2021-08-12 23:37 ` [PATCH v2 01/19] ARC: mm: use SCRATCH_DATA0 register for caching pgdir in ARCv2 only Vineet Gupta
2021-08-12 23:37   ` Vineet Gupta
2021-08-15  9:27   ` Mike Rapoport
2021-08-15  9:27     ` Mike Rapoport
2021-08-16 19:45     ` Vineet Gupta
2021-08-16 19:45       ` Vineet Gupta
2021-08-12 23:37 ` [PATCH v2 02/19] ARC: mm: remove tlb paranoid code Vineet Gupta
2021-08-12 23:37   ` Vineet Gupta
2021-08-12 23:37 ` [PATCH v2 03/19] ARC: mm: move mmu/cache externs out to setup.h Vineet Gupta
2021-08-12 23:37   ` Vineet Gupta
2021-08-15  9:27   ` Mike Rapoport
2021-08-15  9:27     ` Mike Rapoport
2021-08-16 19:47     ` Vineet Gupta
2021-08-16 19:47       ` Vineet Gupta
2021-08-12 23:37 ` [PATCH v2 04/19] ARC: mm: Fixes to allow STRICT_MM_TYPECHECKS Vineet Gupta
2021-08-12 23:37   ` Vineet Gupta
2021-08-12 23:37 ` [PATCH v2 05/19] ARC: mm: Enable STRICT_MM_TYPECHECKS Vineet Gupta
2021-08-12 23:37   ` Vineet Gupta
2021-08-12 23:37 ` [PATCH v2 06/19] ARC: ioremap: use more commonly used PAGE_KERNEL based uncached flag Vineet Gupta
2021-08-12 23:37   ` Vineet Gupta
2021-08-12 23:37 ` Vineet Gupta [this message]
2021-08-12 23:37   ` [PATCH v2 07/19] ARC: mm: pmd_populate* to use the canonical set_pmd (and drop pmd_set) Vineet Gupta
2021-08-12 23:37 ` [PATCH v2 08/19] ARC: mm: switch pgtable_t back to struct page * Vineet Gupta
2021-08-12 23:37   ` Vineet Gupta
2021-08-13 10:45   ` kernel test robot
2021-08-13 10:45     ` kernel test robot
2021-08-13 10:45     ` kernel test robot
2021-08-13 14:25     ` Vineet Gupta
2021-08-13 14:25       ` Vineet Gupta
2021-08-13 14:25       ` Vineet Gupta
2021-08-12 23:37 ` [PATCH v2 09/19] ARC: mm: switch to asm-generic/pgalloc.h Vineet Gupta
2021-08-12 23:37   ` Vineet Gupta
2021-08-12 23:37 ` [PATCH v2 10/19] ARC: mm: non-functional code cleanup ahead of 3 levels Vineet Gupta
2021-08-12 23:37   ` Vineet Gupta
2021-08-12 23:37 ` [PATCH v2 11/19] ARC: mm: move MMU specific bits out of ASID allocator Vineet Gupta
2021-08-12 23:37   ` Vineet Gupta
2021-08-12 23:37 ` [PATCH v2 12/19] ARC: mm: move MMU specific bits out of entry code Vineet Gupta
2021-08-12 23:37   ` Vineet Gupta
2021-08-12 23:37 ` [PATCH v2 13/19] ARC: mm: disintegrate mmu.h (arcv2 bits out) Vineet Gupta
2021-08-12 23:37   ` Vineet Gupta
2021-08-13  4:01   ` kernel test robot
2021-08-13  4:01     ` kernel test robot
2021-08-13  4:01     ` kernel test robot
2021-08-13 14:48     ` Vineet Gupta
2021-08-13 14:48       ` Vineet Gupta
2021-08-13 14:48       ` Vineet Gupta
2021-08-12 23:37 ` [PATCH v2 14/19] ARC: mm: disintegrate pgtable.h into levels and flags Vineet Gupta
2021-08-12 23:37   ` Vineet Gupta
2021-08-12 23:37 ` [PATCH v2 15/19] ARC: mm: hack to allow 2 level build with 4 level code Vineet Gupta
2021-08-12 23:37   ` Vineet Gupta
2021-08-12 23:37 ` [PATCH v2 16/19] ARC: mm: support 3 levels of page tables Vineet Gupta
2021-08-12 23:37   ` Vineet Gupta
2021-08-15  9:27   ` Mike Rapoport
2021-08-15  9:27     ` Mike Rapoport
2021-08-16 19:53     ` Vineet Gupta
2021-08-16 19:53       ` Vineet Gupta
2021-08-17  5:03       ` Mike Rapoport
2021-08-17  5:03         ` Mike Rapoport
2021-08-12 23:37 ` [PATCH v2 17/19] ARC: mm: support 4 " Vineet Gupta
2021-08-12 23:37   ` Vineet Gupta
2021-08-12 23:37 ` [PATCH v2 18/19] ARC: mm: vmalloc sync from kernel to user table to update PMD Vineet Gupta
2021-08-12 23:37   ` Vineet Gupta
2021-08-12 23:37 ` [PATCH v2 19/19] ARC: mm: introduce _PAGE_TABLE to explicitly link pgd,pud,pmd entries Vineet Gupta
2021-08-12 23:37   ` [PATCH v2 19/19] ARC: mm: introduce _PAGE_TABLE to explicitly link pgd, pud, pmd entries Vineet Gupta
2021-08-15  9:26 ` [PATCH v2 00/19] ARC mm updates: support 3/4 levels and asm-generic/pgalloc Mike Rapoport
2021-08-15  9:26   ` Mike Rapoport
2021-08-16 19:58   ` Vineet Gupta
2021-08-16 19:58     ` Vineet Gupta
2021-08-17  5:04     ` Mike Rapoport
2021-08-17  5:04       ` Mike Rapoport

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