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KVM/PPC fixes for 5.1

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- Fix host hang in the HTM assist code for POWER9
 - Take srcu read lock around memslot lookup
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Merge tag 'kvm-ppc-fixes-5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD

KVM/PPC fixes for 5.1

- Fix host hang in the HTM assist code for POWER9
- Take srcu read lock around memslot lookup
This commit is contained in:
Paolo Bonzini 2019-04-18 18:53:12 +02:00
commit 78671ab4c9
2 changed files with 6 additions and 4 deletions
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6
arch/powerpc/kvm/book3s_64_vio.c
View file

@ -543,14 +543,14 @@ long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
if (ret != H_SUCCESS)
return ret;
idx = srcu_read_lock(&vcpu->kvm->srcu);
ret = kvmppc_tce_validate(stt, tce);
if (ret != H_SUCCESS)
return ret;
goto unlock_exit;
dir = iommu_tce_direction(tce);
idx = srcu_read_lock(&vcpu->kvm->srcu);
if ((dir != DMA_NONE) && kvmppc_tce_to_ua(vcpu->kvm, tce, &ua, NULL)) {
ret = H_PARAMETER;
goto unlock_exit;

4
arch/powerpc/kvm/book3s_hv.c
View file

@ -3423,7 +3423,9 @@ static int kvmhv_load_hv_regs_and_go(struct kvm_vcpu *vcpu, u64 time_limit,
vcpu->arch.shregs.sprg2 = mfspr(SPRN_SPRG2);
vcpu->arch.shregs.sprg3 = mfspr(SPRN_SPRG3);
mtspr(SPRN_PSSCR, host_psscr);
/* Preserve PSSCR[FAKE_SUSPEND] until we've called kvmppc_save_tm_hv */
mtspr(SPRN_PSSCR, host_psscr |
(local_paca->kvm_hstate.fake_suspend << PSSCR_FAKE_SUSPEND_LG));
mtspr(SPRN_HFSCR, host_hfscr);
mtspr(SPRN_CIABR, host_ciabr);
mtspr(SPRN_DAWR, host_dawr);