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[POWERPC] Add code for removing HPTEs for parts of the linear mapping

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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>
This commit is contained in:
Badari Pulavarty
2008-01-29 09:19:24 +11:00
committed by Paul Mackerras
parent f8303dd3db
commit f8c8803bda
4 changed files with 41 additions and 0 deletions
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15
arch/powerpc/platforms/pseries/lpar.c
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@@ -520,6 +520,20 @@ static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long va,
BUG_ON(lpar_rc != H_SUCCESS);
}
static void pSeries_lpar_hpte_removebolted(unsigned long ea,
int psize, int ssize)
{
unsigned long slot, vsid, va;
vsid = get_kernel_vsid(ea, ssize);
va = hpt_va(ea, vsid, ssize);
slot = pSeries_lpar_hpte_find(va, psize, ssize);
BUG_ON(slot == -1);
pSeries_lpar_hpte_invalidate(slot, va, psize, ssize, 0);
}
/* Flag bits for H_BULK_REMOVE */
#define HBR_REQUEST 0x4000000000000000UL
#define HBR_RESPONSE 0x8000000000000000UL
@@ -597,6 +611,7 @@ void __init hpte_init_lpar(void)
ppc_md.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp;
ppc_md.hpte_insert = pSeries_lpar_hpte_insert;
ppc_md.hpte_remove = pSeries_lpar_hpte_remove;
ppc_md.hpte_removebolted = pSeries_lpar_hpte_removebolted;
ppc_md.flush_hash_range = pSeries_lpar_flush_hash_range;
ppc_md.hpte_clear_all = pSeries_lpar_hptab_clear;
}