diff options
| author | Matt Evans <matt@ozlabs.org> | 2011-12-07 17:55:57 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2012-03-05 13:52:38 +0100 |
| commit | b5434032fcfd7490c6453feb397fb781762b6f09 (patch) | |
| tree | a0fade79c7b73169c1af134459392f489b025c56 /arch/powerpc/kvm/powerpc.c | |
| parent | KVM: PPC: Fix vcpu_create dereference before validity check. (diff) | |
| download | linux-b5434032fcfd7490c6453feb397fb781762b6f09.tar.xz linux-b5434032fcfd7490c6453feb397fb781762b6f09.zip | |
KVM: PPC: Add KVM_CAP_NR_VCPUS and KVM_CAP_MAX_VCPUS
PPC KVM lacks these two capabilities, and as such a userland system must assume
a max of 4 VCPUs (following api.txt). With these, a userland can determine
a more realistic limit.
Signed-off-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/powerpc/kvm/powerpc.c')
| -rw-r--r-- | arch/powerpc/kvm/powerpc.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 25171037a36c..f4380cb264e0 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -249,6 +249,22 @@ int kvm_dev_ioctl_check_extension(long ext) r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0; break; #endif + case KVM_CAP_NR_VCPUS: + /* + * Recommending a number of CPUs is somewhat arbitrary; we + * return the number of present CPUs for -HV (since a host + * will have secondary threads "offline"), and for other KVM + * implementations just count online CPUs. + */ +#ifdef CONFIG_KVM_BOOK3S_64_HV + r = num_present_cpus(); +#else + r = num_online_cpus(); +#endif + break; + case KVM_CAP_MAX_VCPUS: + r = KVM_MAX_VCPUS; + break; default: r = 0; break; |