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| author | Peter Gonda <[email protected]> | 2022-05-02 16:58:07 +0000 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2022-05-06 17:08:04 +0000 |
| commit | 0c2c7c069285374fc8feacddc0498f8ab7627117 (patch) | |
| tree | c6ec000f4bca25b5db8ce92b2d9d97cc2fba0c96 /tools/perf/scripts/python/flamegraph.py | |
| parent | Merge branch 'kvm-amd-pmu-fixes' into HEAD (diff) | |
| download | kernel-0c2c7c069285374fc8feacddc0498f8ab7627117.tar.gz kernel-0c2c7c069285374fc8feacddc0498f8ab7627117.zip | |
KVM: SEV: Mark nested locking of vcpu->lock
svm_vm_migrate_from() uses sev_lock_vcpus_for_migration() to lock all
source and target vcpu->locks. Unfortunately there is an 8 subclass
limit, so a new subclass cannot be used for each vCPU. Instead maintain
ownership of the first vcpu's mutex.dep_map using a role specific
subclass: source vs target. Release the other vcpu's mutex.dep_maps.
Fixes: b56639318bb2b ("KVM: SEV: Add support for SEV intra host migration")
Reported-by: John Sperbeck<[email protected]>
Suggested-by: David Rientjes <[email protected]>
Suggested-by: Sean Christopherson <[email protected]>
Suggested-by: Paolo Bonzini <[email protected]>
Cc: Hillf Danton <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Peter Gonda <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/flamegraph.py')
0 files changed, 0 insertions, 0 deletions