From: Kefeng Wang <wangkefeng.wang@huawei.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>
Cc: <linux-mm@kvack.org>, Kefeng Wang <wangkefeng.wang@huawei.com>
Subject: [PATCH 4/4] arm64: Add HAVE_IOREMAP_PROT support
Date: Wed, 27 Apr 2022 20:14:13 +0800 [thread overview]
Message-ID: <20220427121413.168468-5-wangkefeng.wang@huawei.com> (raw)
In-Reply-To: <20220427121413.168468-1-wangkefeng.wang@huawei.com>
With ioremap_prot() defination from generic ioremap, also move
pte_pgprot() from hugetlbpage.c into pgtable.h, then arm64 could
have HAVE_IOREMAP_PROT, which will enable generic_access_phys()
code.
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
.../features/vm/ioremap_prot/arch-support.txt | 2 +-
arch/arm64/Kconfig | 1 +
arch/arm64/include/asm/pgtable.h | 10 ++++++++++
arch/arm64/mm/hugetlbpage.c | 10 ----------
4 files changed, 12 insertions(+), 11 deletions(-)
diff --git a/Documentation/features/vm/ioremap_prot/arch-support.txt b/Documentation/features/vm/ioremap_prot/arch-support.txt
index a6dcbe5f47b6..b39ad5d61216 100644
--- a/Documentation/features/vm/ioremap_prot/arch-support.txt
+++ b/Documentation/features/vm/ioremap_prot/arch-support.txt
@@ -9,7 +9,7 @@
| alpha: | TODO |
| arc: | ok |
| arm: | TODO |
- | arm64: | TODO |
+ | arm64: | ok |
| csky: | TODO |
| h8300: | TODO |
| hexagon: | TODO |
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 838c45f1517b..0357708c4d32 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -188,6 +188,7 @@ config ARM64
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_GCC_PLUGINS
select HAVE_HW_BREAKPOINT if PERF_EVENTS
+ select HAVE_IOREMAP_PROT
select HAVE_IRQ_TIME_ACCOUNTING
select HAVE_KVM
select HAVE_NMI
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 94e147e5456c..4d8ae0b7f814 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -402,6 +402,16 @@ static inline pgprot_t mk_pmd_sect_prot(pgprot_t prot)
return __pgprot((pgprot_val(prot) & ~PMD_TABLE_BIT) | PMD_TYPE_SECT);
}
+/*
+ * Select all bits except the pfn
+ */
+static inline pgprot_t pte_pgprot(pte_t pte)
+{
+ unsigned long pfn = pte_pfn(pte);
+
+ return __pgprot(pte_val(pfn_pte(pfn, __pgprot(0))) ^ pte_val(pte));
+}
+
#ifdef CONFIG_NUMA_BALANCING
/*
* See the comment in include/linux/pgtable.h
diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c
index cbace1c9e137..38d03406f6aa 100644
--- a/arch/arm64/mm/hugetlbpage.c
+++ b/arch/arm64/mm/hugetlbpage.c
@@ -100,16 +100,6 @@ int pud_huge(pud_t pud)
#endif
}
-/*
- * Select all bits except the pfn
- */
-static inline pgprot_t pte_pgprot(pte_t pte)
-{
- unsigned long pfn = pte_pfn(pte);
-
- return __pgprot(pte_val(pfn_pte(pfn, __pgprot(0))) ^ pte_val(pte));
-}
-
static int find_num_contig(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, size_t *pgsize)
{
--
2.26.2
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next prev parent reply other threads:[~2022-04-27 12:04 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-27 12:14 [PATCH 0/4] arm64: Cleanup ioremap() and support ioremap_prot() Kefeng Wang
2022-04-27 12:14 ` [PATCH 1/4] mm: ioremap: Setup phys_addr of struct vm_struct Kefeng Wang
2022-04-27 17:10 ` Andrew Morton
2022-04-28 1:40 ` Kefeng Wang
2022-04-28 15:41 ` Christoph Hellwig
2022-04-27 12:14 ` [PATCH 2/4] mm: ioremap: Add arch_ioremap/iounmap_check() Kefeng Wang
2022-04-27 17:04 ` Andrew Morton
2022-04-28 6:16 ` Kefeng Wang
2022-04-28 15:46 ` Christoph Hellwig
2022-04-27 18:20 ` Arnd Bergmann
2022-04-27 18:25 ` Andrew Morton
2022-04-27 20:46 ` Arnd Bergmann
2022-04-28 6:20 ` Kefeng Wang
2022-04-28 6:47 ` Arnd Bergmann
2022-04-27 12:14 ` [PATCH 3/4] arm64: mm: Convert to GENERIC_IOREMAP Kefeng Wang
2022-04-27 17:11 ` Andrew Morton
2022-04-27 12:14 ` Kefeng Wang [this message]
2022-04-28 10:46 ` [PATCH 0/4] arm64: Cleanup ioremap() and support ioremap_prot() Will Deacon
2022-04-28 11:48 ` Kefeng Wang
2022-04-28 15:48 ` Christoph Hellwig
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