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ppc/spapr_caps: Add SPAPR_CAP_NESTED_KVM_HV

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Add the spapr cap SPAPR_CAP_NESTED_KVM_HV to be used to control the
availability of nested kvm-hv to the level 1 (L1) guest.

Assuming a hypervisor with support enabled an L1 guest can be allowed to
use the kvm-hv module (and thus run it's own kvm-hv guests) by setting:
-machine pseries,cap-nested-hv=true
or disabled with:
-machine pseries,cap-nested-hv=false

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Suraj Jitindar Singh 2018-10-08 14:25:39 +11:00 • committed by David Gibson
parent 56de52cad9
commit b9a477b725
5 changed files with 62 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

12
target/ppc/kvm.c
View file

@ -91,6 +91,7 @@ static int cap_ppc_pvr_compat;
static int cap_ppc_safe_cache;
static int cap_ppc_safe_bounds_check;
static int cap_ppc_safe_indirect_branch;
static int cap_ppc_nested_kvm_hv;
static uint32_t debug_inst_opcode;
@ -150,6 +151,7 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
cap_mmu_hash_v3 = kvm_vm_check_extension(s, KVM_CAP_PPC_MMU_HASH_V3);
cap_resize_hpt = kvm_vm_check_extension(s, KVM_CAP_SPAPR_RESIZE_HPT);
kvmppc_get_cpu_characteristics(s);
cap_ppc_nested_kvm_hv = kvm_vm_check_extension(s, KVM_CAP_PPC_NESTED_HV);
/*
* Note: setting it to false because there is not such capability
* in KVM at this moment.
@ -2422,6 +2424,16 @@ int kvmppc_get_cap_safe_indirect_branch(void)
return cap_ppc_safe_indirect_branch;
}
bool kvmppc_has_cap_nested_kvm_hv(void)
{
return !!cap_ppc_nested_kvm_hv;
}
int kvmppc_set_cap_nested_kvm_hv(int enable)
{
return kvm_vm_enable_cap(kvm_state, KVM_CAP_PPC_NESTED_HV, 0, enable);
}
bool kvmppc_has_cap_spapr_vfio(void)
{
return cap_spapr_vfio;