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Subject[PATCH] riscv: Implement ioremap_prot support
Date
Feature ioremap_prot only needs an implementation of pte_pgprot on riscv.
That macro is similar on platform loongarch, mips and sh.
We just need to replace _PFN_MASK with _PAGE_PFN_MASK, and select
HAVE_IOREMAP_PROT in arch/riscv/Kconfig.

Signed-off-by: Jianwen Jiang <jiangjianwen@uniontech.com>
---
arch/riscv/Kconfig | 1 +
arch/riscv/include/asm/page.h | 2 ++
2 files changed, 3 insertions(+)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index fa78595a6089..5ed2c7361040 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -95,6 +95,7 @@ config RISCV
select HAVE_FUNCTION_ERROR_INJECTION
select HAVE_GCC_PLUGINS
select HAVE_GENERIC_VDSO if MMU && 64BIT
+ select HAVE_IOREMAP_PROT
select HAVE_IRQ_TIME_ACCOUNTING
select HAVE_KPROBES if !XIP_KERNEL
select HAVE_KPROBES_ON_FTRACE if !XIP_KERNEL
diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h
index ac70b0fd9a9a..d379b4702849 100644
--- a/arch/riscv/include/asm/page.h
+++ b/arch/riscv/include/asm/page.h
@@ -84,6 +84,8 @@ typedef struct page *pgtable_t;
#define __pgd(x) ((pgd_t) { (x) })
#define __pgprot(x) ((pgprot_t) { (x) })

+#define pte_pgprot(x) __pgprot(pte_val(x) & ~_PAGE_PFN_MASK)
+
#ifdef CONFIG_64BIT
#define PTE_FMT "%016lx"
#else
--
2.37.3.446.gd42b38dfb5
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