diff options
| author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2016-02-15 04:55:05 +0300 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2016-02-16 05:44:26 +0300 |
| commit | 366baf28ee3fc22dea504a0bddf8edd1e9bcee70 (patch) | |
| tree | 38bee7a88979d6a95093084055619d10bd17fb61 /arch/powerpc/include/asm/kvm_host.h | |
| parent | fcbb2ce672848481275c1f014ad44ccd1e43a7a2 (diff) | |
| download | linux-366baf28ee3fc22dea504a0bddf8edd1e9bcee70.tar.xz | |
KVM: PPC: Use RCU for arch.spapr_tce_tables
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>
Diffstat (limited to 'arch/powerpc/include/asm/kvm_host.h')
| -rw-r--r-- | arch/powerpc/include/asm/kvm_host.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 9d08d8cbed1a..ffdbc2dc18f9 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -183,6 +183,7 @@ struct kvmppc_spapr_tce_table { struct kvm *kvm; u64 liobn; u32 window_size; + struct rcu_head rcu; struct page *pages[0]; }; |