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139d42ca51
Currently, the kernel couldn't boot when ARCH_IOREMAP, ARCH_WRITECOMBINE
and KASAN are enabled together. Because DMW2 is used by kernel now which
is configured as 0xa000000000000000 for WriteCombine, but KASAN has no
segment mapping for it. This patch fix this issue.
Solution: Add the relevant definitions for WriteCombine (DMW2) in KASAN.
Cc: stable@vger.kernel.org
Fixes: 8e02c3b782 ("LoongArch: Add writecombine support for DMW-based ioremap()")
Signed-off-by: Kanglong Wang <wangkanglong@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
94 lines
3.3 KiB
C
94 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_KASAN_H
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#define __ASM_KASAN_H
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#ifndef __ASSEMBLY__
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#include <linux/linkage.h>
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#include <linux/mmzone.h>
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#include <asm/addrspace.h>
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#include <asm/io.h>
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#include <asm/pgtable.h>
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#define KASAN_SHADOW_SCALE_SHIFT 3
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#define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
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#define XRANGE_SHIFT (48)
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/* Valid address length */
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#define XRANGE_SHADOW_SHIFT min(cpu_vabits, VA_BITS)
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/* Used for taking out the valid address */
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#define XRANGE_SHADOW_MASK GENMASK_ULL(XRANGE_SHADOW_SHIFT - 1, 0)
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/* One segment whole address space size */
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#define XRANGE_SIZE (XRANGE_SHADOW_MASK + 1)
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/* 64-bit segment value. */
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#define XKPRANGE_UC_SEG (0x8000)
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#define XKPRANGE_CC_SEG (0x9000)
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#define XKPRANGE_WC_SEG (0xa000)
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#define XKVRANGE_VC_SEG (0xffff)
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/* Cached */
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#define XKPRANGE_CC_START CACHE_BASE
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#define XKPRANGE_CC_SIZE XRANGE_SIZE
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#define XKPRANGE_CC_KASAN_OFFSET (0)
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#define XKPRANGE_CC_SHADOW_SIZE (XKPRANGE_CC_SIZE >> KASAN_SHADOW_SCALE_SHIFT)
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#define XKPRANGE_CC_SHADOW_END (XKPRANGE_CC_KASAN_OFFSET + XKPRANGE_CC_SHADOW_SIZE)
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/* UnCached */
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#define XKPRANGE_UC_START UNCACHE_BASE
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#define XKPRANGE_UC_SIZE XRANGE_SIZE
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#define XKPRANGE_UC_KASAN_OFFSET XKPRANGE_CC_SHADOW_END
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#define XKPRANGE_UC_SHADOW_SIZE (XKPRANGE_UC_SIZE >> KASAN_SHADOW_SCALE_SHIFT)
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#define XKPRANGE_UC_SHADOW_END (XKPRANGE_UC_KASAN_OFFSET + XKPRANGE_UC_SHADOW_SIZE)
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/* WriteCombine */
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#define XKPRANGE_WC_START WRITECOMBINE_BASE
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#define XKPRANGE_WC_SIZE XRANGE_SIZE
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#define XKPRANGE_WC_KASAN_OFFSET XKPRANGE_UC_SHADOW_END
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#define XKPRANGE_WC_SHADOW_SIZE (XKPRANGE_WC_SIZE >> KASAN_SHADOW_SCALE_SHIFT)
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#define XKPRANGE_WC_SHADOW_END (XKPRANGE_WC_KASAN_OFFSET + XKPRANGE_WC_SHADOW_SIZE)
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/* VMALLOC (Cached or UnCached) */
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#define XKVRANGE_VC_START MODULES_VADDR
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#define XKVRANGE_VC_SIZE round_up(KFENCE_AREA_END - MODULES_VADDR + 1, PGDIR_SIZE)
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#define XKVRANGE_VC_KASAN_OFFSET XKPRANGE_WC_SHADOW_END
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#define XKVRANGE_VC_SHADOW_SIZE (XKVRANGE_VC_SIZE >> KASAN_SHADOW_SCALE_SHIFT)
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#define XKVRANGE_VC_SHADOW_END (XKVRANGE_VC_KASAN_OFFSET + XKVRANGE_VC_SHADOW_SIZE)
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/* KAsan shadow memory start right after vmalloc. */
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#define KASAN_SHADOW_START round_up(KFENCE_AREA_END, PGDIR_SIZE)
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#define KASAN_SHADOW_SIZE (XKVRANGE_VC_SHADOW_END - XKPRANGE_CC_KASAN_OFFSET)
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#define KASAN_SHADOW_END (round_up(KASAN_SHADOW_START + KASAN_SHADOW_SIZE, PGDIR_SIZE) - 1)
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#define XKPRANGE_CC_SHADOW_OFFSET (KASAN_SHADOW_START + XKPRANGE_CC_KASAN_OFFSET)
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#define XKPRANGE_UC_SHADOW_OFFSET (KASAN_SHADOW_START + XKPRANGE_UC_KASAN_OFFSET)
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#define XKPRANGE_WC_SHADOW_OFFSET (KASAN_SHADOW_START + XKPRANGE_WC_KASAN_OFFSET)
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#define XKVRANGE_VC_SHADOW_OFFSET (KASAN_SHADOW_START + XKVRANGE_VC_KASAN_OFFSET)
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extern bool kasan_early_stage;
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extern unsigned char kasan_early_shadow_page[PAGE_SIZE];
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#define kasan_mem_to_shadow kasan_mem_to_shadow
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void *kasan_mem_to_shadow(const void *addr);
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#define kasan_shadow_to_mem kasan_shadow_to_mem
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const void *kasan_shadow_to_mem(const void *shadow_addr);
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#define kasan_arch_is_ready kasan_arch_is_ready
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static __always_inline bool kasan_arch_is_ready(void)
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{
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return !kasan_early_stage;
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}
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#define addr_has_metadata addr_has_metadata
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static __always_inline bool addr_has_metadata(const void *addr)
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{
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return (kasan_mem_to_shadow((void *)addr) != NULL);
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}
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void kasan_init(void);
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asmlinkage void kasan_early_init(void);
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#endif
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#endif
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