[POWERPC] Add code for removing HPTEs for parts of the linear mapping
For memory remove, we need to clean up htab mappings for the section of the memory we are removing. This implements support for removing htab bolted mappings for pSeries logical partitions. Other sub-archs may need to implement similar functionality for hotplug memory remove to work on them. Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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Paul Mackerras
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f8303dd3db
commit
f8c8803bda
@ -192,6 +192,24 @@ int htab_bolt_mapping(unsigned long vstart, unsigned long vend,
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return ret < 0 ? ret : 0;
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}
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static void htab_remove_mapping(unsigned long vstart, unsigned long vend,
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int psize, int ssize)
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{
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unsigned long vaddr;
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unsigned int step, shift;
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shift = mmu_psize_defs[psize].shift;
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step = 1 << shift;
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if (!ppc_md.hpte_removebolted) {
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printk("Sub-arch doesn't implement hpte_removebolted\n");
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return;
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}
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for (vaddr = vstart; vaddr < vend; vaddr += step)
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ppc_md.hpte_removebolted(vaddr, psize, ssize);
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}
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static int __init htab_dt_scan_seg_sizes(unsigned long node,
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const char *uname, int depth,
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void *data)
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@ -430,6 +448,11 @@ void create_section_mapping(unsigned long start, unsigned long end)
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_PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_COHERENT | PP_RWXX,
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mmu_linear_psize, mmu_kernel_ssize));
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}
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void remove_section_mapping(unsigned long start, unsigned long end)
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{
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htab_remove_mapping(start, end, mmu_linear_psize, mmu_kernel_ssize);
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}
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#endif /* CONFIG_MEMORY_HOTPLUG */
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static inline void make_bl(unsigned int *insn_addr, void *func)
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