diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index e1ac69edf08a..f3cdf51d0191 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -105,6 +105,10 @@ static bool indep_threads_mode = true; module_param(indep_threads_mode, bool, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(indep_threads_mode, "Independent-threads mode (only on POWER9)"); +static bool one_vm_per_core; +module_param(one_vm_per_core, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(one_vm_per_core, "Only run vCPUs from the same VM on a core (requires indep_threads_mode=N)"); + #ifdef CONFIG_KVM_XICS static struct kernel_param_ops module_param_ops = { .set = param_set_int, @@ -2709,6 +2713,10 @@ static bool can_dynamic_split(struct kvmppc_vcore *vc, struct core_info *cip) if (!cpu_has_feature(CPU_FTR_ARCH_207S)) return false; + /* In one_vm_per_core mode, require all vcores to be from the same vm */ + if (one_vm_per_core && vc->kvm != cip->vc[0]->kvm) + return false; + /* Some POWER9 chips require all threads to be in the same MMU mode */ if (no_mixing_hpt_and_radix && kvm_is_radix(vc->kvm) != kvm_is_radix(cip->vc[0]->kvm)) |