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| author |   Tom Lendacky <thomas.lendacky@amd.com> | 2021-05-06 15:14:41 -0500 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2021-05-07 06:06:23 -0400 |
| commit | ce7ea0cfdc2e9ff31d12da31c3226deddb9644f5 (patch) | |
| tree | 921b38c2bc256a037a897cdb62889aeab8f3fd4f /tools/testing/selftests | |
| parent | KVM: SVM: Invert user pointer casting in SEV {en,de}crypt helpers (diff) | |
| download | wireguard-linux-ce7ea0cfdc2e9ff31d12da31c3226deddb9644f5.tar.xz wireguard-linux-ce7ea0cfdc2e9ff31d12da31c3226deddb9644f5.zip | |
KVM: SVM: Move GHCB unmapping to fix RCU warning
When an SEV-ES guest is running, the GHCB is unmapped as part of the
vCPU run support. However, kvm_vcpu_unmap() triggers an RCU dereference
warning with CONFIG_PROVE_LOCKING=y because the SRCU lock is released
before invoking the vCPU run support.
Move the GHCB unmapping into the prepare_guest_switch callback, which is
invoked while still holding the SRCU lock, eliminating the RCU dereference
warning.
Fixes: 291bd20d5d88 ("KVM: SVM: Add initial support for a VMGEXIT VMEXIT")
Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Message-Id: <b2f9b79d15166f2c3e4375c0d9bc3268b7696455.1620332081.git.thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/testing/selftests')
0 files changed, 0 insertions, 0 deletions