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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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6435f773d8
This patch implements CONFIG_DEBUG_VIRTUAL to do additional checks on virt_to_phys and __pa_symbol calls. virt_to_phys used for linear mapping check, and __pa_symbol used for kernel symbol check. In current RISC-V, kernel image maps to linear mapping area. If CONFIG_DEBUG_VIRTUAL is disable, these two functions calculate the offset on the address feded directly without any checks. The result of test_debug_virtual as follows: [ 0.358456] ------------[ cut here ]------------ [ 0.358738] virt_to_phys used for non-linear address: (____ptrval____) (0xffffffd000000000) [ 0.359174] WARNING: CPU: 0 PID: 1 at arch/riscv/mm/physaddr.c:16 __virt_to_phys+0x3c/0x50 [ 0.359409] Modules linked in: [ 0.359630] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.5.0-rc3-00002-g5133c5c0ca13 #57 [ 0.359861] epc: ffffffe000253d1a ra : ffffffe000253d1a sp : ffffffe03aa87da0 [ 0.360019] gp : ffffffe000ae03b0 tp : ffffffe03aa88000 t0 : ffffffe000af2660 [ 0.360175] t1 : 0000000000000064 t2 : 00000000000000b7 s0 : ffffffe03aa87dc0 [ 0.360330] s1 : ffffffd000000000 a0 : 000000000000004f a1 : 0000000000000000 [ 0.360492] a2 : 0000000000000000 a3 : 0000000000000000 a4 : ffffffe000a84358 [ 0.360672] a5 : 0000000000000000 a6 : 0000000000000000 a7 : 0000000000000000 [ 0.360876] s2 : ffffffe000ae0600 s3 : ffffffe00000fc7c s4 : ffffffe0000224b0 [ 0.361067] s5 : ffffffe000030890 s6 : ffffffe000022470 s7 : 0000000000000008 [ 0.361267] s8 : ffffffe0000002c4 s9 : ffffffe000ae0640 s10: ffffffe000ae0630 [ 0.361453] s11: 0000000000000000 t3 : 0000000000000000 t4 : 000000000001e6d0 [ 0.361636] t5 : ffffffe000ae0a18 t6 : ffffffe000aee54e [ 0.361806] status: 0000000000000120 badaddr: 0000000000000000 cause: 0000000000000003 [ 0.362056] ---[ end trace aec0bf78d4978122 ]--- [ 0.362404] PA: 0xfffffff080200000 for VA: 0xffffffd000000000 [ 0.362607] PA: 0x00000000baddd2d0 for VA: 0xffffffe03abdd2d0 Signed-off-by: Zong Li <zong.li@sifive.com> Reviewed-by: Paul Walmsley <paul.walmsley@sifive.com> Tested-by: Paul Walmsley <paul.walmsley@sifive.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
147 lines
4.1 KiB
C
147 lines
4.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com>
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* Copyright (C) 2012 Regents of the University of California
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* Copyright (C) 2017 SiFive
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* Copyright (C) 2017 XiaojingZhu <zhuxiaoj@ict.ac.cn>
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*/
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#ifndef _ASM_RISCV_PAGE_H
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#define _ASM_RISCV_PAGE_H
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#include <linux/pfn.h>
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#include <linux/const.h>
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#define PAGE_SHIFT (12)
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#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
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#define PAGE_MASK (~(PAGE_SIZE - 1))
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#ifdef CONFIG_64BIT
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#define HUGE_MAX_HSTATE 2
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#else
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#define HUGE_MAX_HSTATE 1
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#endif
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#define HPAGE_SHIFT PMD_SHIFT
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#define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT)
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#define HPAGE_MASK (~(HPAGE_SIZE - 1))
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#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
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/*
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* PAGE_OFFSET -- the first address of the first page of memory.
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* When not using MMU this corresponds to the first free page in
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* physical memory (aligned on a page boundary).
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*/
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#define PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL)
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#define KERN_VIRT_SIZE (-PAGE_OFFSET)
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#ifndef __ASSEMBLY__
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#define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
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#define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1)))
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/* align addr on a size boundary - adjust address up/down if needed */
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#define _ALIGN_UP(addr, size) (((addr)+((size)-1))&(~((size)-1)))
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#define _ALIGN_DOWN(addr, size) ((addr)&(~((size)-1)))
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/* align addr on a size boundary - adjust address up if needed */
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#define _ALIGN(addr, size) _ALIGN_UP(addr, size)
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#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
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#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
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#define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
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#define copy_user_page(vto, vfrom, vaddr, topg) \
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memcpy((vto), (vfrom), PAGE_SIZE)
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/*
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* Use struct definitions to apply C type checking
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*/
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/* Page Global Directory entry */
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typedef struct {
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unsigned long pgd;
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} pgd_t;
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/* Page Table entry */
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typedef struct {
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unsigned long pte;
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} pte_t;
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typedef struct {
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unsigned long pgprot;
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} pgprot_t;
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typedef struct page *pgtable_t;
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#define pte_val(x) ((x).pte)
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#define pgd_val(x) ((x).pgd)
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#define pgprot_val(x) ((x).pgprot)
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#define __pte(x) ((pte_t) { (x) })
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#define __pgd(x) ((pgd_t) { (x) })
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#define __pgprot(x) ((pgprot_t) { (x) })
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#ifdef CONFIG_64BIT
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#define PTE_FMT "%016lx"
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#else
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#define PTE_FMT "%08lx"
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#endif
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#ifdef CONFIG_MMU
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extern unsigned long va_pa_offset;
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extern unsigned long pfn_base;
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#define ARCH_PFN_OFFSET (pfn_base)
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#else
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#define va_pa_offset 0
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#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
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#endif /* CONFIG_MMU */
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extern unsigned long max_low_pfn;
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extern unsigned long min_low_pfn;
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#define __pa_to_va_nodebug(x) ((void *)((unsigned long) (x) + va_pa_offset))
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#define __va_to_pa_nodebug(x) ((unsigned long)(x) - va_pa_offset)
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#ifdef CONFIG_DEBUG_VIRTUAL
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extern phys_addr_t __virt_to_phys(unsigned long x);
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extern phys_addr_t __phys_addr_symbol(unsigned long x);
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#else
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#define __virt_to_phys(x) __va_to_pa_nodebug(x)
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#define __phys_addr_symbol(x) __va_to_pa_nodebug(x)
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#endif /* CONFIG_DEBUG_VIRTUAL */
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#define __pa_symbol(x) __phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0))
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#define __pa(x) __virt_to_phys((unsigned long)(x))
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#define __va(x) ((void *)__pa_to_va_nodebug((phys_addr_t)(x)))
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#define phys_to_pfn(phys) (PFN_DOWN(phys))
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#define pfn_to_phys(pfn) (PFN_PHYS(pfn))
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#define virt_to_pfn(vaddr) (phys_to_pfn(__pa(vaddr)))
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#define pfn_to_virt(pfn) (__va(pfn_to_phys(pfn)))
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#define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
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#define page_to_virt(page) (pfn_to_virt(page_to_pfn(page)))
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#define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
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#define page_to_bus(page) (page_to_phys(page))
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#define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr)))
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#ifdef CONFIG_FLATMEM
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#define pfn_valid(pfn) \
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(((pfn) >= ARCH_PFN_OFFSET) && (((pfn) - ARCH_PFN_OFFSET) < max_mapnr))
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#endif
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#endif /* __ASSEMBLY__ */
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#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr)))
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#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
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VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
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#include <asm-generic/memory_model.h>
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#include <asm-generic/getorder.h>
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#endif /* _ASM_RISCV_PAGE_H */
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