diff options
| author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2018-09-10 18:29:09 +1000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-24 08:22:57 +0100 |
| commit | 67697026c0dec36e6bd09e26838724ddc8af3c0e (patch) | |
| tree | bff1c077891490a86c0d66482e0771562a5bdcf9 /arch/powerpc | |
| parent | b14bef1238754ec0ff46ac682cad26c3b04a64b7 (diff) | |
KVM: PPC: Inform the userspace about TCE update failures
[ Upstream commit f7960e299f13f069d6f3d4e157d91bfca2669677 ]
We return H_TOO_HARD from TCE update handlers when we think that
the next handler (realmode -> virtual mode -> user mode) has a chance to
handle the request; H_HARDWARE/H_CLOSED otherwise.
This changes the handlers to return H_TOO_HARD on every error giving
the userspace an opportunity to handle any request or at least log
them all.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kvm/book3s_64_vio.c | 8 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s_64_vio_hv.c | 6 |
2 files changed, 7 insertions, 7 deletions
diff --git a/arch/powerpc/kvm/book3s_64_vio.c b/arch/powerpc/kvm/book3s_64_vio.c index 2c6cce8e7cfd..5e4446296021 100644 --- a/arch/powerpc/kvm/book3s_64_vio.c +++ b/arch/powerpc/kvm/book3s_64_vio.c @@ -404,7 +404,7 @@ static long kvmppc_tce_iommu_unmap(struct kvm *kvm, long ret; if (WARN_ON_ONCE(iommu_tce_xchg(tbl, entry, &hpa, &dir))) - return H_HARDWARE; + return H_TOO_HARD; if (dir == DMA_NONE) return H_SUCCESS; @@ -434,15 +434,15 @@ long kvmppc_tce_iommu_map(struct kvm *kvm, struct iommu_table *tbl, return H_TOO_HARD; if (WARN_ON_ONCE(mm_iommu_ua_to_hpa(mem, ua, tbl->it_page_shift, &hpa))) - return H_HARDWARE; + return H_TOO_HARD; if (mm_iommu_mapped_inc(mem)) - return H_CLOSED; + return H_TOO_HARD; ret = iommu_tce_xchg(tbl, entry, &hpa, &dir); if (WARN_ON_ONCE(ret)) { mm_iommu_mapped_dec(mem); - return H_HARDWARE; + return H_TOO_HARD; } if (dir != DMA_NONE) diff --git a/arch/powerpc/kvm/book3s_64_vio_hv.c b/arch/powerpc/kvm/book3s_64_vio_hv.c index 23d6d1592f11..c75e5664fe3d 100644 --- a/arch/powerpc/kvm/book3s_64_vio_hv.c +++ b/arch/powerpc/kvm/book3s_64_vio_hv.c @@ -264,14 +264,14 @@ static long kvmppc_rm_tce_iommu_map(struct kvm *kvm, struct iommu_table *tbl, if (WARN_ON_ONCE_RM(mm_iommu_ua_to_hpa_rm(mem, ua, tbl->it_page_shift, &hpa))) - return H_HARDWARE; + return H_TOO_HARD; pua = (void *) vmalloc_to_phys(pua); if (WARN_ON_ONCE_RM(!pua)) return H_HARDWARE; if (WARN_ON_ONCE_RM(mm_iommu_mapped_inc(mem))) - return H_CLOSED; + return H_TOO_HARD; ret = iommu_tce_xchg_rm(tbl, entry, &hpa, &dir); if (ret) { @@ -448,7 +448,7 @@ long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu, rmap = (void *) vmalloc_to_phys(rmap); if (WARN_ON_ONCE_RM(!rmap)) - return H_HARDWARE; + return H_TOO_HARD; /* * Synchronize with the MMU notifier callbacks in |