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| author |   Anton Romanov <romanton@google.com> | 2022-02-16 18:26:54 +0000 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2022-02-17 09:52:50 -0500 |
| commit | 3a55f729240a686aa8af00af436306c0cd532522 (patch) | |
| tree | f56b89a48e29f69dcb97e64a97e2eca3a1b2beed /lib/test_overflow.c | |
| parent | KVM: Fix lockdep false negative during host resume (diff) | |
| download | wireguard-linux-3a55f729240a686aa8af00af436306c0cd532522.tar.xz wireguard-linux-3a55f729240a686aa8af00af436306c0cd532522.zip | |
kvm: x86: Disable KVM_HC_CLOCK_PAIRING if tsc is in always catchup mode
If vcpu has tsc_always_catchup set each request updates pvclock data.
KVM_HC_CLOCK_PAIRING consumers such as ptp_kvm_x86 rely on tsc read on
host's side and do hypercall inside pvclock_read_retry loop leading to
infinite loop in such situation.
v3:
Removed warn
Changed return code to KVM_EFAULT
v2:
Added warn
Signed-off-by: Anton Romanov <romanton@google.com>
Message-Id: <20220216182653.506850-1-romanton@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'lib/test_overflow.c')
0 files changed, 0 insertions, 0 deletions