|
 |
26ba25 |
#! /bin/bash
|
|
|
26ba25 |
|
|
|
26ba25 |
kvm_setup_powerpc () {
|
|
|
26ba25 |
if grep '^platform[[:space:]]*:[[:space:]]*PowerNV' /proc/cpuinfo > /dev/null; then
|
|
|
26ba25 |
# PowerNV platform, which is KVM HV capable
|
|
|
26ba25 |
|
|
|
26ba25 |
if [ -z "$SUBCORES" ]; then
|
|
|
26ba25 |
SUBCORES=1
|
|
|
26ba25 |
fi
|
|
|
26ba25 |
|
|
|
26ba25 |
# Step 1. Load the KVM HVmodule
|
|
|
26ba25 |
if ! modprobe -b kvm_hv; then
|
|
|
26ba25 |
return
|
|
|
26ba25 |
fi
|
|
|
26ba25 |
|
|
|
26ba25 |
# On POWER8 a host core can only run threads of a single
|
|
|
26ba25 |
# guest, meaning that SMT must be disabled on the host in
|
|
|
26ba25 |
# order to run KVM guests. (Also applieds to POWER7, but we
|
|
|
26ba25 |
# don't support that).
|
|
|
26ba25 |
#
|
|
|
26ba25 |
# POWER9 doesn't have this limitation (though it will for hash
|
|
|
26ba25 |
# guests on radix host when that's implemented). So, only set
|
|
|
26ba25 |
# up subcores and disable SMT for POWER*.
|
|
|
26ba25 |
if grep '^cpu[[:space:]]*:[[:space:]]*POWER8' /proc/cpuinfo > /dev/null; then
|
|
|
26ba25 |
# Step 2. Configure subcore mode
|
|
|
26ba25 |
/usr/sbin/ppc64_cpu --subcores-per-core=$SUBCORES
|
|
|
26ba25 |
|
|
|
26ba25 |
# Step 3. Disable SMT (multithreading)
|
|
|
26ba25 |
/usr/sbin/ppc64_cpu --smt=off
|
|
|
26ba25 |
fi
|
|
|
26ba25 |
fi
|
|
|
26ba25 |
}
|
|
|
26ba25 |
|
|
|
26ba25 |
case $(uname -m) in
|
|
|
26ba25 |
ppc64|ppc64le)
|
|
|
26ba25 |
kvm_setup_powerpc
|
|
|
26ba25 |
;;
|
|
|
26ba25 |
esac
|
|
|
26ba25 |
|
|
|
26ba25 |
exit 0
|