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| author |   Paul Mackerras <paulus@ozlabs.org> | 2018-10-08 14:24:30 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@ozlabs.org> | 2018-10-09 16:14:54 +1100 |
| commit | 901f8c3f6feb0225c14b3bc6237850fb921d2f2d (patch) | |
| tree | d9f4edd5ed3899d8270b329990292ba5b52079d4 /Documentation/virtual | |
| parent | KVM: PPC: Book3S HV: Add a VM capability to enable nested virtualization (diff) | |
| download | linux-dev-901f8c3f6feb0225c14b3bc6237850fb921d2f2d.tar.xz linux-dev-901f8c3f6feb0225c14b3bc6237850fb921d2f2d.zip | |
KVM: PPC: Book3S HV: Add NO_HASH flag to GET_SMMU_INFO ioctl result
This adds a KVM_PPC_NO_HASH flag to the flags field of the
kvm_ppc_smmu_info struct, and arranges for it to be set when
running as a nested hypervisor, as an unambiguous indication
to userspace that HPT guests are not supported. Reporting the
KVM_CAP_PPC_MMU_HASH_V3 capability as false could be taken as
indicating only that the new HPT features in ISA V3.0 are not
supported, leaving it ambiguous whether pre-V3.0 HPT features
are supported.
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Diffstat (limited to 'Documentation/virtual')
| -rw-r--r-- | Documentation/virtual/kvm/api.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index fde48b6708f1..df98b6304769 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -2270,6 +2270,10 @@ The supported flags are: The emulated MMU supports 1T segments in addition to the standard 256M ones. + - KVM_PPC_NO_HASH + This flag indicates that HPT guests are not supported by KVM, + thus all guests must use radix MMU mode. + The "slb_size" field indicates how many SLB entries are supported The "sps" array contains 8 entries indicating the supported base |