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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2019-05-17 16:19:24 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-06-21 02:29:39 +0200 |
| commit | 128531d9e10908a08761ed1ce10e607985d172d7 (patch) | |
| tree | 8221bb01bfe2372edbdd2f801d7bc6ca8c6f91d3 /docs/hyperv.txt | |
| parent | 8caba36db5d70beb5353b5b5d28421b67275bcf0 (diff) | |
| download | qemu-128531d9e10908a08761ed1ce10e607985d172d7.zip qemu-128531d9e10908a08761ed1ce10e607985d172d7.tar.gz qemu-128531d9e10908a08761ed1ce10e607985d172d7.tar.bz2 | |
i386/kvm: add support for Direct Mode for Hyper-V synthetic timers
Hyper-V on KVM can only use Synthetic timers with Direct Mode (opting for
an interrupt instead of VMBus message). This new capability is only
announced in KVM_GET_SUPPORTED_HV_CPUID.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20190517141924.19024-10-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'docs/hyperv.txt')
| -rw-r--r-- | docs/hyperv.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/docs/hyperv.txt b/docs/hyperv.txt index beadb2d..8fdf25c 100644 --- a/docs/hyperv.txt +++ b/docs/hyperv.txt @@ -174,6 +174,16 @@ without the feature to find out if enabling it is beneficial. Requires: hv-vapic +3.17. hv-stimer-direct +======================= +Hyper-V specification allows synthetic timer operation in two modes: "classic", +when expiration event is delivered as SynIC message and "direct", when the event +is delivered via normal interrupt. It is known that nested Hyper-V can only +use synthetic timers in direct mode and thus 'hv-stimer-direct' needs to be +enabled. + +Requires: hv-vpindex, hv-synic, hv-time, hv-stimer + 4. Development features ======================== |