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| author | Alexey Kardashevskiy | 2014-05-27 07:36:30 +0200 |
|---|---|---|
| committer | Alexander Graf | 2014-06-16 13:24:39 +0200 |
| commit | da95324ebe462b14a3507af02eb4a689c8a1619f (patch) | |
| tree | 246278f453437fa1e744a1c02869710006554c74 /hw/ppc/spapr.c | |
| parent | spapr: Enable dynamic change of the supported hypercalls list (diff) | |
| download | qemu-da95324ebe462b14a3507af02eb4a689c8a1619f.tar.gz qemu-da95324ebe462b14a3507af02eb4a689c8a1619f.tar.xz qemu-da95324ebe462b14a3507af02eb4a689c8a1619f.zip | |
spapr_iommu: Enable multiple TCE requests
Currently only single TCE entry per request is supported (H_PUT_TCE).
However PAPR+ specification allows multiple entry requests such as
H_PUT_TCE_INDIRECT and H_STUFF_TCE. Having less transitions to the host
kernel via ioctls, support of these calls can accelerate IOMMU operations.
This implements H_STUFF_TCE and H_PUT_TCE_INDIRECT.
This advertises "multi-tce" capability to the guest if the host kernel
supports it (KVM_CAP_SPAPR_MULTITCE) or guest is running in TCG mode.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'hw/ppc/spapr.c')
| -rw-r--r-- | hw/ppc/spapr.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 39f196304d..8f612c9347 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -537,6 +537,9 @@ static void *spapr_create_fdt_skel(hwaddr initrd_base, /* RTAS */ _FDT((fdt_begin_node(fdt, "rtas"))); + if (!kvm_enabled() || kvmppc_spapr_use_multitce()) { + add_str(hypertas, "hcall-multi-tce"); + } _FDT((fdt_property(fdt, "ibm,hypertas-functions", hypertas->str, hypertas->len))); g_string_free(hypertas, TRUE); |