KVM: x86: WARN if a vCPU gets a valid wakeup that KVM can't yet inject

Browse source

WARN if a blocking vCPU is awakened by a valid wake event that KVM can't
inject, e.g. because KVM needs to complete a nested VM-enter, or needs to
re-inject an exception.  For the nested VM-Enter case, KVM is supposed to
clear "nested_run_pending" if L1 puts L2 into HLT, i.e. entering HLT
"completes" the nested VM-Enter.  And for already-injected exceptions, it
should be impossible for the vCPU to be in a blocking state if a VM-Exit
occurred while an exception was being vectored.

Link: https://lore.kernel.org/r/20240607172609.3205077-7-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

...

This commit is contained in:

Sean Christopherson 2024-06-07 10:26:09 -07:00

parent 321ef62b0c

commit 45405155d8

1 changed files with 4 additions and 1 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

5

arch/x86/kvm/x86.c

View file