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| author | Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com> | 2013-08-26 10:48:36 +0200 |
|---|---|---|
| committer | Gleb Natapov <gleb@redhat.com> | 2013-08-26 11:47:49 +0200 |
| commit | 9bc6cbebfe006bcf0f83b10221cd4b893a130d10 (patch) | |
| tree | 957ba8780239c78fdea13ceb78327c3652a9303f /Documentation/virtual/kvm/cpuid.txt | |
| parent | kvm hypervisor: Simplify kvm_for_each_vcpu with kvm_irq_delivery_to_apic (diff) | |
| download | linux-9bc6cbebfe006bcf0f83b10221cd4b893a130d10.tar.xz linux-9bc6cbebfe006bcf0f83b10221cd4b893a130d10.zip | |
Documentation/kvm : Add documentation on Hypercalls and features used for PV spinlock
KVM_HC_KICK_CPU hypercall added to wakeup halted vcpu in paravirtual spinlock
enabled guest.
KVM_FEATURE_PV_UNHALT enables guest to check whether pv spinlock can be enabled
in guest.
Thanks Vatsa for rewriting KVM_HC_KICK_CPU
Cc: Rob Landley <rob@landley.net>
Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
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 'Documentation/virtual/kvm/cpuid.txt')
| -rw-r--r-- | Documentation/virtual/kvm/cpuid.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/cpuid.txt b/Documentation/virtual/kvm/cpuid.txt index 83afe65d4966..22ff659bc0fb 100644 --- a/Documentation/virtual/kvm/cpuid.txt +++ b/Documentation/virtual/kvm/cpuid.txt @@ -43,6 +43,10 @@ KVM_FEATURE_CLOCKSOURCE2 || 3 || kvmclock available at msrs KVM_FEATURE_ASYNC_PF || 4 || async pf can be enabled by || || writing to msr 0x4b564d02 ------------------------------------------------------------------------------ +KVM_FEATURE_PV_UNHALT || 7 || guest checks this feature bit + || || before enabling paravirtualized + || || spinlock support. +------------------------------------------------------------------------------ KVM_FEATURE_CLOCKSOURCE_STABLE_BIT || 24 || host will warn if no guest-side || || per-cpu warps are expected in || || kvmclock. |