diff options
author | Vitaly Kuznetsov | 2021-03-16 15:37:35 +0100 |
---|---|---|
committer | Paolo Bonzini | 2021-03-18 08:02:46 -0400 |
commit | cc9cfddb0433961107bb156fa769fdd7eb6718de (patch) | |
tree | 94155bc1737da39f522c5b59848fc451c5cb03c1 /sound/ac97_bus.c | |
parent | e880c6ea55b9805294ecc100ee95e0c9860ae90e (diff) |
KVM: x86: hyper-v: Track Hyper-V TSC page status
Create an infrastructure for tracking Hyper-V TSC page status, i.e. if it
was updated from guest/host side or if we've failed to set it up (because
e.g. guest wrote some garbage to HV_X64_MSR_REFERENCE_TSC) and there's no
need to retry.
Also, in a hypothetical situation when we are in 'always catchup' mode for
TSC we can now avoid contending 'hv->hv_lock' on every guest enter by
setting the state to HV_TSC_PAGE_BROKEN after compute_tsc_page_parameters()
returns false.
Check for HV_TSC_PAGE_SET state instead of '!hv->tsc_ref.tsc_sequence' in
get_time_ref_counter() to properly handle the situation when we failed to
write the updated TSC page values to the guest.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210316143736.964151-4-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'sound/ac97_bus.c')
0 files changed, 0 insertions, 0 deletions