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Merge branch 'riscv-wx-mappings' into for-next

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This contains both the short-term fix for the W+X boot mappings and the
larger cleanup.

* riscv-wx-mappings:
  riscv: Map the kernel with correct permissions the first time
  riscv: Introduce set_kernel_memory helper
  riscv: Simplify xip and !xip kernel address conversion macros
  riscv: Remove CONFIG_PHYS_RAM_BASE_FIXED
  riscv: mm: Fix W+X mappings at boot
This commit is contained in:
Palmer Dabbelt
2021-06-30 21:50:32 -07:00
parent 47513f243b e5c35fa040
commit 01112e5e20
7 changed files with 102 additions and 94 deletions
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27
arch/riscv/include/asm/page.h
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@@ -83,55 +83,58 @@ extern unsigned long va_pa_offset;
#ifdef CONFIG_64BIT
extern unsigned long va_kernel_pa_offset;
#endif
#ifdef CONFIG_XIP_KERNEL
extern unsigned long va_kernel_xip_pa_offset;
#endif
extern unsigned long pfn_base;
extern uintptr_t load_sz;
#define ARCH_PFN_OFFSET (pfn_base)
#else
#define va_pa_offset 0
#ifdef CONFIG_64BIT
#define va_kernel_pa_offset 0
#endif
#define va_kernel_xip_pa_offset 0
#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
#endif /* CONFIG_MMU */
extern unsigned long kernel_virt_addr;
#ifdef CONFIG_64BIT
#define is_kernel_mapping(x) \
((x) >= kernel_virt_addr && (x) < (kernel_virt_addr + load_sz))
#define is_linear_mapping(x) \
((x) >= PAGE_OFFSET && (x) < kernel_virt_addr)
#define linear_mapping_pa_to_va(x) ((void *)((unsigned long)(x) + va_pa_offset))
#ifdef CONFIG_XIP_KERNEL
#define kernel_mapping_pa_to_va(y) ({ \
unsigned long _y = y; \
(_y >= CONFIG_PHYS_RAM_BASE) ? \
(void *)((unsigned long)(_y) + va_kernel_pa_offset + XIP_OFFSET) : \
(void *)((unsigned long)(_y) + va_kernel_xip_pa_offset); \
})
#else
#define kernel_mapping_pa_to_va(x) ((void *)((unsigned long)(x) + va_kernel_pa_offset))
#endif
#define __pa_to_va_nodebug(x) linear_mapping_pa_to_va(x)
#define linear_mapping_va_to_pa(x) ((unsigned long)(x) - va_pa_offset)
#ifdef CONFIG_XIP_KERNEL
#define kernel_mapping_va_to_pa(y) ({ \
unsigned long _y = y; \
(_y < kernel_virt_addr + XIP_OFFSET) ? \
((unsigned long)(_y) - va_kernel_xip_pa_offset) : \
((unsigned long)(_y) - va_kernel_pa_offset - XIP_OFFSET); \
})
#else
#define kernel_mapping_va_to_pa(x) ((unsigned long)(x) - va_kernel_pa_offset)
#endif
#define __va_to_pa_nodebug(x) ({ \
unsigned long _x = x; \
(_x < kernel_virt_addr) ? \
is_linear_mapping(_x) ? \
linear_mapping_va_to_pa(_x) : kernel_mapping_va_to_pa(_x); \
})
#else
#define is_kernel_mapping(x) \
((x) >= kernel_virt_addr && (x) < (kernel_virt_addr + load_sz))
#define is_linear_mapping(x) \
((x) >= PAGE_OFFSET)
#define __pa_to_va_nodebug(x) ((void *)((unsigned long) (x) + va_pa_offset))
#define __va_to_pa_nodebug(x) ((unsigned long)(x) - va_pa_offset)
#endif
#endif /* CONFIG_64BIT */
#ifdef CONFIG_DEBUG_VIRTUAL
extern phys_addr_t __virt_to_phys(unsigned long x);