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Date: Fri, 2 Dec 2022 16:33:56 +0800 From: Jianwen Jiang <jiangjianwen@...ontech.com> To: paul.walmsley@...ive.com, palmer@...belt.com, aou@...s.berkeley.edu, alexandre.ghiti@...onical.com, geert@...ux-m68k.org, panqinglin2020@...as.ac.cn, arnd@...db.de Cc: linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org, Jianwen Jiang <jiangjianwen@...ontech.com> Subject: [PATCH] Implement ioremap_prot support (v2) Feature ioremap_prot only needs an implementation of pte_pgprot on riscv. That macro is similar to the same one on platform loongarch, mips and sh. We just need: 1. replace _PFN_MASK with _PAGE_PFN_MASK in pte_gpprot; 2. add "select HAVE_IOREMAP_PROT" into arch/riscv/Kconfig; 3. add "depends on MMU" into drivers/fpga/Kconfig to fix the building error "undefined reference to generic_access_phys". Signed-off-by: Jianwen Jiang <jiangjianwen@...ontech.com> --- arch/riscv/Kconfig | 1 + arch/riscv/include/asm/page.h | 2 ++ drivers/fpga/Kconfig | 1 + 3 files changed, 4 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..cb08a4911d60 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 diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig index bbe0a7cabb75..0493272b8bff 100644 --- a/drivers/fpga/Kconfig +++ b/drivers/fpga/Kconfig @@ -5,6 +5,7 @@ menuconfig FPGA tristate "FPGA Configuration Framework" + depends on MMU help Say Y here if you want support for configuring FPGAs from the kernel. The FPGA framework adds an FPGA manager class and FPGA -- 2.37.3.446.gd42b38dfb5
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