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KVM: PPC: Book3S HV: Add function kvmhv_vcpu_is_radix() 

There exists a function kvm_is_radix() which is used to determine if a
kvm instance is using the radix mmu. However this only applies to the
first level (L1) guest. Add a function kvmhv_vcpu_is_radix() which can
be used to determine if the current execution context of the vcpu is
radix, accounting for if the vcpu is running a nested guest.

Currently all nested guests must be radix but this may change in the
future.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
Suraj Jitindar Singh 2018-12-14 16:29:04 +11:00 committed by Paul Mackerras
parent 693ac10a88
commit d232afebf9
2 changed files with 14 additions and 0 deletions
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13
arch/powerpc/include/asm/kvm_book3s_64.h
View File

@ -55,6 +55,7 @@ struct kvm_nested_guest {
cpumask_t need_tlb_flush;
cpumask_t cpu_in_guest;
short prev_cpu[NR_CPUS];
u8 radix; /* is this nested guest radix */
};
/*
@ -150,6 +151,18 @@ static inline bool kvm_is_radix(struct kvm *kvm)
return kvm->arch.radix;
}
static inline bool kvmhv_vcpu_is_radix(struct kvm_vcpu *vcpu)
{
bool radix;
if (vcpu->arch.nested)
radix = vcpu->arch.nested->radix;
else
radix = kvm_is_radix(vcpu->kvm);
return radix;
}
#define KVM_DEFAULT_HPT_ORDER 24 /* 16MB HPT by default */
#endif

1
arch/powerpc/kvm/book3s_hv_nested.c
View File

@ -480,6 +480,7 @@ struct kvm_nested_guest *kvmhv_alloc_nested(struct kvm *kvm, unsigned int lpid)
if (shadow_lpid < 0)
goto out_free2;
gp->shadow_lpid = shadow_lpid;
gp->radix = 1;
memset(gp->prev_cpu, -1, sizeof(gp->prev_cpu));