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kvm: x86: disable the narrow guest module parameter on unload

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When the kvm_intel module unloads the module parameter
'allow_smaller_maxphyaddr' is not cleared because the backing variable is
defined in the kvm module.  As a result, if the module parameter's state
was set before kvm_intel unloads, it will also be set when it reloads.
Explicitly clear the state in vmx_exit() to prevent this from happening.

Signed-off-by: Aaron Lewis <aaronlewis@google.com>
Message-Id: <20210623203426.1891402-1-aaronlewis@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
This commit is contained in:
Aaron Lewis 2021-06-23 20:34:27 +00:00 committed by Paolo Bonzini
parent 39bbcc3a4e
commit 88213da235
1 changed files with 2 additions and 0 deletions
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2
arch/x86/kvm/vmx/vmx.c
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@ -7925,6 +7925,8 @@ static void vmx_exit(void)
}
#endif
vmx_cleanup_l1d_flush();
allow_smaller_maxphyaddr = false;
}
module_exit(vmx_exit);