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From: steve.capper@arm.com (Steve Capper)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH V2 3/4] arm64: mm: Define arch_get_mmap_end, arch_get_mmap_base
Date: Wed, 17 Oct 2018 17:34:58 +0100	[thread overview]
Message-ID: <20181017163459.20175-4-steve.capper@arm.com> (raw)
In-Reply-To: <20181017163459.20175-1-steve.capper@arm.com>

Now that we have DEFAULT_MAP_WINDOW defined, we can arch_get_mmap_end
and arch_get_mmap_base helpers to allow for high addresses in mmap.

Signed-off-by: Steve Capper <steve.capper@arm.com>
---
 arch/arm64/include/asm/processor.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h
index 46c9d9ff028c..5afc0c5eb1cb 100644
--- a/arch/arm64/include/asm/processor.h
+++ b/arch/arm64/include/asm/processor.h
@@ -78,6 +78,13 @@
 #define STACK_TOP		STACK_TOP_MAX
 #endif /* CONFIG_COMPAT */
 
+#define arch_get_mmap_end(addr) ((addr > DEFAULT_MAP_WINDOW) ? TASK_SIZE :\
+				DEFAULT_MAP_WINDOW)
+
+#define arch_get_mmap_base(addr, base) ((addr > DEFAULT_MAP_WINDOW) ? \
+					base + TASK_SIZE - DEFAULT_MAP_WINDOW :\
+					base)
+
 extern phys_addr_t arm64_dma_phys_limit;
 #define ARCH_LOW_ADDRESS_LIMIT	(arm64_dma_phys_limit - 1)
 
-- 
2.11.0

WARNING: multiple messages have this Message-ID (diff)
From: Steve Capper <steve.capper@arm.com>
To: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org
Cc: catalin.marinas@arm.com, will.deacon@arm.com,
	ard.biesheuvel@linaro.org, jcm@redhat.com,
	Steve Capper <steve.capper@arm.com>
Subject: [PATCH V2 3/4] arm64: mm: Define arch_get_mmap_end, arch_get_mmap_base
Date: Wed, 17 Oct 2018 17:34:58 +0100	[thread overview]
Message-ID: <20181017163459.20175-4-steve.capper@arm.com> (raw)
In-Reply-To: <20181017163459.20175-1-steve.capper@arm.com>

Now that we have DEFAULT_MAP_WINDOW defined, we can arch_get_mmap_end
and arch_get_mmap_base helpers to allow for high addresses in mmap.

Signed-off-by: Steve Capper <steve.capper@arm.com>
---
 arch/arm64/include/asm/processor.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h
index 46c9d9ff028c..5afc0c5eb1cb 100644
--- a/arch/arm64/include/asm/processor.h
+++ b/arch/arm64/include/asm/processor.h
@@ -78,6 +78,13 @@
 #define STACK_TOP		STACK_TOP_MAX
 #endif /* CONFIG_COMPAT */
 
+#define arch_get_mmap_end(addr) ((addr > DEFAULT_MAP_WINDOW) ? TASK_SIZE :\
+				DEFAULT_MAP_WINDOW)
+
+#define arch_get_mmap_base(addr, base) ((addr > DEFAULT_MAP_WINDOW) ? \
+					base + TASK_SIZE - DEFAULT_MAP_WINDOW :\
+					base)
+
 extern phys_addr_t arm64_dma_phys_limit;
 #define ARCH_LOW_ADDRESS_LIMIT	(arm64_dma_phys_limit - 1)
 
-- 
2.11.0

  parent reply	other threads:[~2018-10-17 16:34 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-17 16:34 [PATCH V2 0/4] 52-bit userspace VAs Steve Capper
2018-10-17 16:34 ` Steve Capper
2018-10-17 16:34 ` [PATCH V2 1/4] mm: mmap: Allow for "high" userspace addresses Steve Capper
2018-10-17 16:34   ` Steve Capper
2018-10-17 16:48   ` Matthew Wilcox
2018-10-17 16:48     ` Matthew Wilcox
2018-10-18 10:35     ` Steve Capper
2018-10-18 10:35       ` Steve Capper
2018-10-17 16:34 ` [PATCH V2 2/4] arm64: mm: Introduce DEFAULT_MAP_WINDOW Steve Capper
2018-10-17 16:34   ` Steve Capper
2018-10-18  1:50   ` kbuild test robot
2018-10-18  1:50     ` kbuild test robot
2018-10-18  2:09   ` kbuild test robot
2018-10-18  2:09     ` kbuild test robot
2018-10-18 10:47   ` Steve Capper
2018-10-18 10:47     ` Steve Capper
2018-10-17 16:34 ` Steve Capper [this message]
2018-10-17 16:34   ` [PATCH V2 3/4] arm64: mm: Define arch_get_mmap_end, arch_get_mmap_base Steve Capper
2018-10-18  2:28   ` kbuild test robot
2018-10-18  2:28     ` kbuild test robot
2018-10-17 16:34 ` [PATCH V2 4/4] arm64: mm: introduce 52-bit userspace support Steve Capper
2018-10-17 16:34   ` Steve Capper
2018-10-18  2:44   ` kbuild test robot
2018-10-18  2:44     ` kbuild test robot

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