From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-mm@kvack.org, akpm@linux-foundation.org
Cc: linux-arch@vger.kernel.org,
Anshuman Khandual <anshuman.khandual@arm.com>,
catalin.marinas@arm.com, linux-kernel@vger.kernel.org,
Christoph Hellwig <hch@infradead.org>,
Khalid Aziz <khalid.aziz@oracle.com>,
sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
"David S. Miller" <davem@davemloft.net>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH V7 4/7] sparc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT
Date: Thu, 14 Apr 2022 11:51:22 +0530 [thread overview]
Message-ID: <20220414062125.609297-5-anshuman.khandual@arm.com> (raw)
In-Reply-To: <20220414062125.609297-1-anshuman.khandual@arm.com>
This defines and exports a platform specific custom vm_get_page_prot() via
subscribing ARCH_HAS_VM_GET_PAGE_PROT. It localizes arch_vm_get_page_prot()
as sparc_vm_get_page_prot() and moves near vm_get_page_prot().
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Khalid Aziz <khalid.aziz@oracle.com>
Cc: sparclinux@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Acked-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Khalid Aziz <khalid.aziz@oracle.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
arch/sparc/Kconfig | 1 +
arch/sparc/include/asm/mman.h | 6 ------
arch/sparc/mm/init_64.c | 12 ++++++++++++
3 files changed, 13 insertions(+), 6 deletions(-)
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 9200bc04701c..85b573643af6 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -84,6 +84,7 @@ config SPARC64
select PERF_USE_VMALLOC
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select HAVE_C_RECORDMCOUNT
+ select ARCH_HAS_VM_GET_PAGE_PROT
select HAVE_ARCH_AUDITSYSCALL
select ARCH_SUPPORTS_ATOMIC_RMW
select ARCH_SUPPORTS_DEBUG_PAGEALLOC
diff --git a/arch/sparc/include/asm/mman.h b/arch/sparc/include/asm/mman.h
index 274217e7ed70..af9c10c83dc5 100644
--- a/arch/sparc/include/asm/mman.h
+++ b/arch/sparc/include/asm/mman.h
@@ -46,12 +46,6 @@ static inline unsigned long sparc_calc_vm_prot_bits(unsigned long prot)
}
}
-#define arch_vm_get_page_prot(vm_flags) sparc_vm_get_page_prot(vm_flags)
-static inline pgprot_t sparc_vm_get_page_prot(unsigned long vm_flags)
-{
- return (vm_flags & VM_SPARC_ADI) ? __pgprot(_PAGE_MCD_4V) : __pgprot(0);
-}
-
#define arch_validate_prot(prot, addr) sparc_validate_prot(prot, addr)
static inline int sparc_validate_prot(unsigned long prot, unsigned long addr)
{
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index 8b1911591581..f6174df2d5af 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -3184,3 +3184,15 @@ void copy_highpage(struct page *to, struct page *from)
}
}
EXPORT_SYMBOL(copy_highpage);
+
+pgprot_t vm_get_page_prot(unsigned long vm_flags)
+{
+ unsigned long prot = pgprot_val(protection_map[vm_flags &
+ (VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)]);
+
+ if (vm_flags & VM_SPARC_ADI)
+ prot |= _PAGE_MCD_4V;
+
+ return __pgprot(prot);
+}
+EXPORT_SYMBOL(vm_get_page_prot);
--
2.25.1
next prev parent reply other threads:[~2022-04-14 6:23 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-14 6:21 [PATCH V7 0/7] mm/mmap: Drop arch_vm_get_page_prot() and arch_filter_pgprot() Anshuman Khandual
2022-04-14 6:21 ` [PATCH V7 1/7] mm/mmap: Add new config ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-04-14 6:21 ` [PATCH V7 2/7] powerpc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-04-14 6:21 ` [PATCH V7 3/7] arm64/mm: " Anshuman Khandual
2022-04-14 6:21 ` Anshuman Khandual [this message]
2022-04-14 6:23 ` [PATCH V7 4/7] sparc/mm: " Christophe Leroy
2022-04-14 6:21 ` [PATCH V7 5/7] x86/mm: " Anshuman Khandual
2022-04-14 6:21 ` [PATCH V7 6/7] mm/mmap: Drop arch_filter_pgprot() Anshuman Khandual
2022-04-14 6:21 ` [PATCH V7 7/7] mm/mmap: Drop arch_vm_get_page_pgprot() Anshuman Khandual
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