KVM: PPC: Use RCU for arch.spapr_tce_tables

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At the moment only spapr_tce_tables updates are protected against races
but not lookups. This fixes missing protection by using RCU for the list.
As lookups also happen in real mode, this uses
list_for_each_entry_lockless() (which is expected not to access any
vmalloc'd memory).

This converts release_spapr_tce_table() to a RCU scheduled handler.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

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This commit is contained in:

Alexey Kardashevskiy 2016-02-15 12:55:05 +11:00 • committed by Paul Mackerras

parent fcbb2ce672

commit 366baf28ee

4 changed files with 14 additions and 11 deletions

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1

arch/powerpc/include/asm/kvm_host.h

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arch/powerpc/kvm/book3s.c

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20

arch/powerpc/kvm/book3s_64_vio.c

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2

arch/powerpc/kvm/book3s_64_vio_hv.c

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