diff options
| author | Alexander Graf <agraf@suse.de> | 2010-08-02 15:38:18 +0400 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-10-24 12:52:03 +0400 |
| commit | c22c31963b4b0c23250e8f520a76427b3986b73b (patch) | |
| tree | 5b928c047d53b3f385e7f9e736c941b00b38be0d /arch/powerpc/kvm/book3s_64_mmu_host.c | |
| parent | 8696ee431233171b3c1cc82bae0193efc4fef2ac (diff) | |
| download | linux-c22c31963b4b0c23250e8f520a76427b3986b73b.tar.xz | |
KVM: PPC: Fix sid map search after flush
After a flush the sid map contained lots of entries with 0 for their gvsid and
hvsid value. Unfortunately, 0 can be a real value the guest searches for when
looking up a vsid so it would incorrectly find the host's 0 hvsid mapping which
doesn't belong to our sid space.
So let's also check for the valid bit that indicated that the sid we're
looking at actually contains useful data.
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm/book3s_64_mmu_host.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_64_mmu_host.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/book3s_64_mmu_host.c b/arch/powerpc/kvm/book3s_64_mmu_host.c index aa516ad81de7..ebb1b5ddabfb 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_host.c +++ b/arch/powerpc/kvm/book3s_64_mmu_host.c @@ -65,14 +65,14 @@ static struct kvmppc_sid_map *find_sid_vsid(struct kvm_vcpu *vcpu, u64 gvsid) sid_map_mask = kvmppc_sid_hash(vcpu, gvsid); map = &to_book3s(vcpu)->sid_map[sid_map_mask]; - if (map->guest_vsid == gvsid) { + if (map->valid && (map->guest_vsid == gvsid)) { dprintk_slb("SLB: Searching: 0x%llx -> 0x%llx\n", gvsid, map->host_vsid); return map; } map = &to_book3s(vcpu)->sid_map[SID_MAP_MASK - sid_map_mask]; - if (map->guest_vsid == gvsid) { + if (map->valid && (map->guest_vsid == gvsid)) { dprintk_slb("SLB: Searching 0x%llx -> 0x%llx\n", gvsid, map->host_vsid); return map; |