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From: Hsin-Yi Wang <hsinyi@chromium.org>
To: linux-arm-kernel@lists.infradead.org
Cc: Rob Herring <robh+dt@kernel.org>,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	Frank Rowand <frowand.list@gmail.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Mike Rapoport <rppt@linux.ibm.com>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Miles Chen <miles.chen@mediatek.com>,
	Hsin-Yi Wang <hsinyi@chromium.org>,
	James Morse <james.morse@arm.com>,
	Andrew Murray <andrew.murray@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Chintan Pandya <cpandya@codeaurora.org>,
	Jun Yao <yaojun8558363@gmail.com>, Yu Zhao <yuzhao@google.com>,
	Robin Murphy <robin.murphy@arm.com>,
	Laura Abbott <labbott@redhat.com>,
	Stephen Boyd <swboyd@chromium.org>,
	Kees Cook <keescook@chromium.org>
Subject: [PATCH v3 1/3] include/of_fdt.h: add a weak arch hook to update fdt pgprot
Date: Thu, 16 May 2019 18:28:15 +0800	[thread overview]
Message-ID: <20190516102817.188519-1-hsinyi@chromium.org> (raw)

Does nothing as default, arch can implement their function to map
fdt to RO/RW. This is convenient if arch map fdt to RO during init
but needs to write fdt in some special cases after that.

Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
---
 drivers/of/fdt.c       | 13 +++++++++++++
 include/linux/of_fdt.h |  2 ++
 2 files changed, 15 insertions(+)

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index de893c9616a1..e84971d1e9ea 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -30,6 +30,19 @@
 
 #include "of_private.h"
 
+/*
+ * update_fdt_pgprot - Arch hook for changing fdt pgprot
+ *
+ * @prot: page protection flags for fdt
+ *
+ * Architecture can implement this function if they want to chagne
+ * fdt page protection flags before or after doing modification and
+ * fixups to fdt.
+ *
+ * Default does nothing.
+ */
+__weak void update_fdt_pgprot(pgprot_t prot) {}
+
 /*
  * of_fdt_limit_memory - limit the number of regions in the /memory node
  * @limit: maximum entries
diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
index a713e5d156d8..406c3e7b2b75 100644
--- a/include/linux/of_fdt.h
+++ b/include/linux/of_fdt.h
@@ -109,5 +109,7 @@ static inline void unflatten_device_tree(void) {}
 static inline void unflatten_and_copy_device_tree(void) {}
 #endif /* CONFIG_OF_EARLY_FLATTREE */
 
+extern void update_fdt_pgprot(pgprot_t prot);
+
 #endif /* __ASSEMBLY__ */
 #endif /* _LINUX_OF_FDT_H */
-- 
2.20.1


WARNING: multiple messages have this Message-ID (diff)
From: Hsin-Yi Wang <hsinyi@chromium.org>
To: linux-arm-kernel@lists.infradead.org
Cc: Rob Herring <robh+dt@kernel.org>,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	Frank Rowand <frowand.list@gmail.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Mike Rapoport <rppt@linux.ibm.com>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Miles Chen <miles.chen@mediatek.com>,
	Hsin-Yi Wang <hsinyi@chromium.org>,
	James Morse <james.morse@arm.com>,
	Andrew Murray <andrew.murray@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Chintan Pandya <cpandya@codeaurora.org>,
	Jun Yao <yaojun8558363@gmail.com>, Yu Zhao <yuzhao@google.com>,
	Robin Murphy <robin.murphy@arm.com>,
	Laura Abbott <labbott@redhat.com>,
	Stephen Boyd <swboyd@chromium.org>, Kees Cook <keescook@ch>
Subject: [PATCH v3 1/3] include/of_fdt.h: add a weak arch hook to update fdt pgprot
Date: Thu, 16 May 2019 18:28:15 +0800	[thread overview]
Message-ID: <20190516102817.188519-1-hsinyi@chromium.org> (raw)

Does nothing as default, arch can implement their function to map
fdt to RO/RW. This is convenient if arch map fdt to RO during init
but needs to write fdt in some special cases after that.

Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
---
 drivers/of/fdt.c       | 13 +++++++++++++
 include/linux/of_fdt.h |  2 ++
 2 files changed, 15 insertions(+)

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index de893c9616a1..e84971d1e9ea 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -30,6 +30,19 @@
 
 #include "of_private.h"
 
+/*
+ * update_fdt_pgprot - Arch hook for changing fdt pgprot
+ *
+ * @prot: page protection flags for fdt
+ *
+ * Architecture can implement this function if they want to chagne
+ * fdt page protection flags before or after doing modification and
+ * fixups to fdt.
+ *
+ * Default does nothing.
+ */
+__weak void update_fdt_pgprot(pgprot_t prot) {}
+
 /*
  * of_fdt_limit_memory - limit the number of regions in the /memory node
  * @limit: maximum entries
diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
index a713e5d156d8..406c3e7b2b75 100644
--- a/include/linux/of_fdt.h
+++ b/include/linux/of_fdt.h
@@ -109,5 +109,7 @@ static inline void unflatten_device_tree(void) {}
 static inline void unflatten_and_copy_device_tree(void) {}
 #endif /* CONFIG_OF_EARLY_FLATTREE */
 
+extern void update_fdt_pgprot(pgprot_t prot);
+
 #endif /* __ASSEMBLY__ */
 #endif /* _LINUX_OF_FDT_H */
-- 
2.20.1

WARNING: multiple messages have this Message-ID (diff)
From: Hsin-Yi Wang <hsinyi@chromium.org>
To: linux-arm-kernel@lists.infradead.org
Cc: Mark Rutland <mark.rutland@arm.com>,
	devicetree@vger.kernel.org, Yu Zhao <yuzhao@google.com>,
	Kees Cook <keescook@chromium.org>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Stephen Boyd <swboyd@chromium.org>,
	Chintan Pandya <cpandya@codeaurora.org>,
	Will Deacon <will.deacon@arm.com>,
	linux-kernel@vger.kernel.org, Mike Rapoport <rppt@linux.ibm.com>,
	Jun Yao <yaojun8558363@gmail.com>,
	Miles Chen <miles.chen@mediatek.com>,
	Rob Herring <robh+dt@kernel.org>,
	James Morse <james.morse@arm.com>,
	Hsin-Yi Wang <hsinyi@chromium.org>,
	Andrew Murray <andrew.murray@arm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Laura Abbott <labbott@redhat.com>,
	Frank Rowand <frowand.list@gmail.com>,
	Robin Murphy <robin.murphy@arm.com>
Subject: [PATCH v3 1/3] include/of_fdt.h: add a weak arch hook to update fdt pgprot
Date: Thu, 16 May 2019 18:28:15 +0800	[thread overview]
Message-ID: <20190516102817.188519-1-hsinyi@chromium.org> (raw)

Does nothing as default, arch can implement their function to map
fdt to RO/RW. This is convenient if arch map fdt to RO during init
but needs to write fdt in some special cases after that.

Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
---
 drivers/of/fdt.c       | 13 +++++++++++++
 include/linux/of_fdt.h |  2 ++
 2 files changed, 15 insertions(+)

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index de893c9616a1..e84971d1e9ea 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -30,6 +30,19 @@
 
 #include "of_private.h"
 
+/*
+ * update_fdt_pgprot - Arch hook for changing fdt pgprot
+ *
+ * @prot: page protection flags for fdt
+ *
+ * Architecture can implement this function if they want to chagne
+ * fdt page protection flags before or after doing modification and
+ * fixups to fdt.
+ *
+ * Default does nothing.
+ */
+__weak void update_fdt_pgprot(pgprot_t prot) {}
+
 /*
  * of_fdt_limit_memory - limit the number of regions in the /memory node
  * @limit: maximum entries
diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
index a713e5d156d8..406c3e7b2b75 100644
--- a/include/linux/of_fdt.h
+++ b/include/linux/of_fdt.h
@@ -109,5 +109,7 @@ static inline void unflatten_device_tree(void) {}
 static inline void unflatten_and_copy_device_tree(void) {}
 #endif /* CONFIG_OF_EARLY_FLATTREE */
 
+extern void update_fdt_pgprot(pgprot_t prot);
+
 #endif /* __ASSEMBLY__ */
 #endif /* _LINUX_OF_FDT_H */
-- 
2.20.1


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             reply	other threads:[~2019-05-16 10:28 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-16 10:28 Hsin-Yi Wang [this message]
2019-05-16 10:28 ` [PATCH v3 1/3] include/of_fdt.h: add a weak arch hook to update fdt pgprot Hsin-Yi Wang
2019-05-16 10:28 ` Hsin-Yi Wang
2019-05-16 10:28 ` [PATCH v3 2/3] arm64: implement update_fdt_pgprot() Hsin-Yi Wang
2019-05-16 10:28   ` Hsin-Yi Wang
2019-05-16 10:28   ` Hsin-Yi Wang
2019-05-16 14:37   ` Rob Herring
2019-05-16 14:37     ` Rob Herring
2019-05-16 14:37     ` Rob Herring
2019-05-16 14:39     ` Ard Biesheuvel
2019-05-16 14:39       ` Ard Biesheuvel
2019-05-16 14:39       ` Ard Biesheuvel
2019-05-16 14:43     ` Mark Rutland
2019-05-16 14:43       ` Mark Rutland
2019-05-16 14:43       ` Mark Rutland
2019-05-16 15:17       ` Rob Herring
2019-05-16 15:17         ` Rob Herring
2019-05-16 15:17         ` Rob Herring
2019-05-16 14:51     ` Hsin-Yi Wang
2019-05-16 14:51       ` Hsin-Yi Wang
2019-05-16 14:51       ` Hsin-Yi Wang
2019-05-16 15:32       ` Rob Herring
2019-05-16 15:32         ` Rob Herring
2019-05-16 15:32         ` Rob Herring
2019-05-16 16:48         ` Hsin-Yi Wang
2019-05-16 16:48           ` Hsin-Yi Wang
2019-05-16 16:48           ` Hsin-Yi Wang
2019-05-16 17:34           ` James Morse
2019-05-16 17:34             ` James Morse
2019-05-16 17:34             ` James Morse
2019-05-16 17:44             ` Stephen Boyd
2019-05-16 17:44               ` Stephen Boyd
2019-05-16 17:44               ` Stephen Boyd
2019-05-16 10:28 ` [PATCH v3 3/3] fdt: add support for rng-seed Hsin-Yi Wang
2019-05-16 10:28   ` Hsin-Yi Wang
2019-05-16 10:28   ` Hsin-Yi Wang
2019-05-16 15:39   ` Randy Dunlap
2019-05-16 15:39     ` Randy Dunlap

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