From: Stephen Boyd <swboyd@chromium.org>
To: Dan Williams <dan.j.williams@intel.com>
Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
Evan Green <evgreen@chromium.org>,
Rob Herring <robh+dt@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Andy Gross <agross@kernel.org>, Will Deacon <will.deacon@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>
Subject: [PATCH v2 4/5] arm64: Add support for arch_memremap_ro()
Date: Fri, 14 Jun 2019 13:37:16 -0700 [thread overview]
Message-ID: <20190614203717.75479-5-swboyd@chromium.org> (raw)
In-Reply-To: <20190614203717.75479-1-swboyd@chromium.org>
Pass in PAGE_KERNEL_RO to the underlying IO mapping mechanism to get a
read-only mapping for the MEMREMAP_RO type of memory mappings that
memremap() supports.
Cc: Evan Green <evgreen@chromium.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Andy Gross <agross@kernel.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
---
arch/arm64/include/asm/io.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index b807cb9b517d..cc33f4c8647b 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -183,6 +183,7 @@ extern void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size);
#define ioremap_nocache(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE))
#define ioremap_wc(addr, size) __ioremap((addr), (size), __pgprot(PROT_NORMAL_NC))
#define ioremap_wt(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE))
+#define arch_memremap_ro(addr, size) __ioremap((addr), (size), PAGE_KERNEL_RO)
#define iounmap __iounmap
/*
--
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next prev parent reply other threads:[~2019-06-14 20:37 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-14 20:37 [PATCH v2 0/5] Read-only memremap() Stephen Boyd
2019-06-14 20:37 ` [PATCH v2 1/5] reserved_mem: Add a devm_memremap_reserved_mem() API Stephen Boyd
2019-06-14 20:37 ` [PATCH v2 2/5] soc: qcom: cmd-db: Migrate to devm_memremap_reserved_mem() Stephen Boyd
2019-06-14 20:37 ` [PATCH v2 3/5] memremap: Add support for read-only memory mappings Stephen Boyd
2019-07-10 14:14 ` Will Deacon
2019-07-18 18:00 ` Stephen Boyd
2019-06-14 20:37 ` Stephen Boyd [this message]
2019-06-14 20:37 ` [PATCH v2 5/5] soc: qcom: cmd-db: Map with read-only mappings Stephen Boyd
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