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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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bffbc94a4d
This was the cause of various boot failures on V480, V880, etc. systems. Kernel image memory was being overwritten because the vmemmap[] array was being sized to small. So if you had physical memory addresses past a certain point, the early bootup would spam all over variables in the kernel data section. The vmemmap mappings map page structs, not page struct pointers. And that was the key thinko in the macro definition. This was fixable thanks to the help, reports, and tireless patience of Hermann Lauer. Reported-by: Hermann Lauer <Hermann.Lauer@iwr.uni-heidelberg.de> Signed-off-by: David S. Miller <davem@davemloft.net>
53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
#ifndef _SPARC64_MM_INIT_H
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#define _SPARC64_MM_INIT_H
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/* Most of the symbols in this file are defined in init.c and
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* marked non-static so that assembler code can get at them.
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*/
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#define MAX_PHYS_ADDRESS (1UL << 41UL)
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#define KPTE_BITMAP_CHUNK_SZ (256UL * 1024UL * 1024UL)
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#define KPTE_BITMAP_BYTES \
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((MAX_PHYS_ADDRESS / KPTE_BITMAP_CHUNK_SZ) / 8)
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#define VALID_ADDR_BITMAP_CHUNK_SZ (4UL * 1024UL * 1024UL)
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#define VALID_ADDR_BITMAP_BYTES \
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((MAX_PHYS_ADDRESS / VALID_ADDR_BITMAP_CHUNK_SZ) / 8)
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extern unsigned long kern_linear_pte_xor[2];
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extern unsigned long kpte_linear_bitmap[KPTE_BITMAP_BYTES / sizeof(unsigned long)];
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extern unsigned int sparc64_highest_unlocked_tlb_ent;
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extern unsigned long sparc64_kern_pri_context;
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extern unsigned long sparc64_kern_pri_nuc_bits;
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extern unsigned long sparc64_kern_sec_context;
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extern void mmu_info(struct seq_file *m);
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struct linux_prom_translation {
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unsigned long virt;
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unsigned long size;
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unsigned long data;
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};
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/* Exported for kernel TLB miss handling in ktlb.S */
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extern struct linux_prom_translation prom_trans[512];
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extern unsigned int prom_trans_ents;
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/* Exported for SMP bootup purposes. */
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extern unsigned long kern_locked_tte_data;
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extern void prom_world(int enter);
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extern void free_initmem(void);
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#ifdef CONFIG_SPARSEMEM_VMEMMAP
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#define VMEMMAP_CHUNK_SHIFT 22
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#define VMEMMAP_CHUNK (1UL << VMEMMAP_CHUNK_SHIFT)
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#define VMEMMAP_CHUNK_MASK ~(VMEMMAP_CHUNK - 1UL)
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#define VMEMMAP_ALIGN(x) (((x)+VMEMMAP_CHUNK-1UL)&VMEMMAP_CHUNK_MASK)
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#define VMEMMAP_SIZE ((((1UL << MAX_PHYSADDR_BITS) >> PAGE_SHIFT) * \
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sizeof(struct page)) >> VMEMMAP_CHUNK_SHIFT)
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extern unsigned long vmemmap_table[VMEMMAP_SIZE];
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#endif
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#endif /* _SPARC64_MM_INIT_H */
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