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authorAlexey Kardashevskiy <aik@ozlabs.ru>2018-02-06 11:08:24 -0700
committerAlex Williamson <alex.williamson@redhat.com>2018-02-06 11:08:24 -0700
commit9ded780c4cc92d15a977dba589d64862e25a340e (patch)
tree64a081469be91b7bacadf05e97d6766885e7a44e /target/ppc/kvm.c
parent07bc681a331311e9c51d1cd8933739a80cd57af8 (diff)
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spapr/iommu: Enable in-kernel TCE acceleration via VFIO KVM device
In order to enable TCE operations support in KVM, we have to inform the KVM about VFIO groups being attached to specific LIOBNs; the necessary bits are implemented already by IOMMU MR and VFIO. This defines get_attr() for the SPAPR TCE IOMMU MR which makes VFIO call the KVM_DEV_VFIO_GROUP_SET_SPAPR_TCE ioctl and establish LIOBN-to-IOMMU link. This changes spapr_tce_set_need_vfio() to avoid TCE table reallocation if the kernel supports the TCE acceleration. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> [aw - remove unnecessary sys/ioctl.h include] Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'target/ppc/kvm.c')
-rw-r--r--target/ppc/kvm.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index 84284d5..9842b3b 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -137,7 +137,7 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
cap_spapr_tce = kvm_check_extension(s, KVM_CAP_SPAPR_TCE);
cap_spapr_tce_64 = kvm_check_extension(s, KVM_CAP_SPAPR_TCE_64);
cap_spapr_multitce = kvm_check_extension(s, KVM_CAP_SPAPR_MULTITCE);
- cap_spapr_vfio = false;
+ cap_spapr_vfio = kvm_vm_check_extension(s, KVM_CAP_SPAPR_TCE_VFIO);
cap_one_reg = kvm_check_extension(s, KVM_CAP_ONE_REG);
cap_hior = kvm_check_extension(s, KVM_CAP_PPC_HIOR);
cap_epr = kvm_check_extension(s, KVM_CAP_PPC_EPR);
@@ -2514,6 +2514,11 @@ int kvmppc_get_cap_safe_indirect_branch(void)
return cap_ppc_safe_indirect_branch;
}
+bool kvmppc_has_cap_spapr_vfio(void)
+{
+ return cap_spapr_vfio;
+}
+
PowerPCCPUClass *kvm_ppc_get_host_cpu_class(void)
{
uint32_t host_pvr = mfpvr();