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author | Paolo Bonzini <pbonzini@redhat.com> | 2016-07-06 13:23:51 +0200 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-07-11 09:49:29 +0200 |
commit | 9314006db8b781715658cd6a28994d84ccce5dee (patch) | |
tree | 697266208e6f5de2b2518a5cf47af15feb4d7bb3 /samples/bpf | |
parent | 55123e3c862d98dc4fbcade38d158c32c022afd8 (diff) | |
download | linux-9314006db8b781715658cd6a28994d84ccce5dee.tar.bz2 |
KVM: nVMX: keep preemption timer enabled during L2 execution
Because the vmcs12 preemption timer is emulated through a separate hrtimer,
we can keep on using the preemption timer in the vmcs02 to emulare L1's
TSC deadline timer.
However, the corresponding bit in the pin-based execution control field
must be kept consistent between vmcs01 and vmcs02. On vmentry we copy
it into the vmcs02; on vmexit the preemption timer must be disabled in
the vmcs01 if a preemption timer vmexit happened while in guest mode.
The preemption timer value in the vmcs02 is set by vmx_vcpu_run, so it
need not be considered in prepare_vmcs02.
Cc: Yunhong Jiang <yunhong.jiang@intel.com>
Cc: Haozhong Zhang <haozhong.zhang@intel.com>
Tested-by: Wanpeng Li <kernellwp@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'samples/bpf')
0 files changed, 0 insertions, 0 deletions