diff options
| author | Sean Christopherson <seanjc@google.com> | 2022-11-30 23:36:49 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-11 16:31:50 +0100 |
| commit | c10d6163b78dabde922f226121ac98cf44c2de5a (patch) | |
| tree | 4ac82cc8ea01f950fe428c9bac87e6454695f0c1 /kernel | |
| parent | d17ee57fc0a40f052843ec2484ae527ebd53eda7 (diff) | |
x86/reboot: Disable virtualization in an emergency if SVM is supported
commit d81f952aa657b76cea381384bef1fea35c5fd266 upstream.
Disable SVM on all CPUs via NMI shootdown during an emergency reboot.
Like VMX, SVM can block INIT, e.g. if the emergency reboot is triggered
between CLGI and STGI, and thus can prevent bringing up other CPUs via
INIT-SIPI-SIPI.
Cc: stable@vger.kernel.org
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20221130233650.1404148-4-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions