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| author | Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> | 2013-08-26 14:18:34 +0530 |
|---|---|---|
| committer | Gleb Natapov <gleb@redhat.com> | 2013-08-26 12:47:09 +0300 |
| commit | 6aef266c6e17b798a1740cf70cd34f90664740b3 (patch) | |
| tree | 9b051ea02c2e12ec289f7465a5eefc807ca6f710 /arch/x86/kvm/cpuid.c | |
| parent | 4b0a8670852c1f577014bf2dc4f8a9d1fd908bb9 (diff) | |
| download | blackbird-obmc-linux-6aef266c6e17b798a1740cf70cd34f90664740b3.tar.gz blackbird-obmc-linux-6aef266c6e17b798a1740cf70cd34f90664740b3.zip | |
kvm hypervisor : Add a hypercall to KVM hypervisor to support pv-ticketlocks
kvm_hc_kick_cpu allows the calling vcpu to kick another vcpu out of halt state.
the presence of these hypercalls is indicated to guest via
kvm_feature_pv_unhalt.
Fold pv_unhalt flag into GET_MP_STATE ioctl to aid migration
During migration, any vcpu that got kicked but did not become runnable
(still in halted state) should be runnable after migration.
Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Signed-off-by: Suzuki Poulose <suzuki@in.ibm.com>
[Raghu: Apic related changes, folding pvunhalted into vcpu_runnable
Added flags for future use (suggested by Gleb)]
[ Raghu: fold pv_unhalt flag as suggested by Eric Northup]
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Acked-by: Gleb Natapov <gleb@redhat.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Diffstat (limited to 'arch/x86/kvm/cpuid.c')
| -rw-r--r-- | arch/x86/kvm/cpuid.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index a20ecb5b6cbf..b110fe6c03d4 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -413,7 +413,8 @@ static int do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, (1 << KVM_FEATURE_CLOCKSOURCE2) | (1 << KVM_FEATURE_ASYNC_PF) | (1 << KVM_FEATURE_PV_EOI) | - (1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT); + (1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT) | + (1 << KVM_FEATURE_PV_UNHALT); if (sched_info_on()) entry->eax |= (1 << KVM_FEATURE_STEAL_TIME); |
