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| author | Paul Mackerras | 2017-11-09 04:30:24 +0100 |
|---|---|---|
| committer | Paul Mackerras | 2017-11-09 04:30:24 +0100 |
| commit | 072df8130c6b602c8ee219f7b06394680cafad2f (patch) | |
| tree | ad7cbc2342be72236851b19a5d9e8a0908dbbdf7 /arch/powerpc/kvm/book3s_64_mmu_hv.c | |
| parent | KVM: PPC: Book3S HV: Run HPT guests on POWER9 radix hosts (diff) | |
| parent | KVM: PPC: Book3S HV: Fix exclusion between HPT resizing and other HPT updates (diff) | |
| download | kernel-qcow2-linux-072df8130c6b602c8ee219f7b06394680cafad2f.tar.gz kernel-qcow2-linux-072df8130c6b602c8ee219f7b06394680cafad2f.tar.xz kernel-qcow2-linux-072df8130c6b602c8ee219f7b06394680cafad2f.zip | |
Merge branch 'kvm-ppc-fixes' into kvm-ppc-next
This merges in a couple of fixes from the kvm-ppc-fixes branch that
modify the same areas of code as some commits from the kvm-ppc-next
branch, in order to resolve the conflicts.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Diffstat (limited to 'arch/powerpc/kvm/book3s_64_mmu_hv.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_64_mmu_hv.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c index 6aec8a22aeff..235319c2574e 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_hv.c +++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c @@ -651,6 +651,16 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, hnow_v = hpte_new_to_old_v(hnow_v, hnow_r); hnow_r = hpte_new_to_old_r(hnow_r); } + + /* + * If the HPT is being resized, don't update the HPTE, + * instead let the guest retry after the resize operation is complete. + * The synchronization for mmu_ready test vs. set is provided + * by the HPTE lock. + */ + if (!kvm->arch.mmu_ready) + goto out_unlock; + if ((hnow_v & ~HPTE_V_HVLOCK) != hpte[0] || hnow_r != hpte[1] || rev->guest_rpte != hpte[2]) /* HPTE has been changed under us; let the guest retry */ |