KVM: PPC: Book3S HV: Add NO_HASH flag to GET_SMMU_INFO ioctl result

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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>

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Paul Mackerras 2018-10-08 14:24:30 +11:00

parent aa069a9969

commit 901f8c3f6f

3 changed files with 9 additions and 0 deletions

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include/uapi/linux/kvm.h

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