diff options
| author | Sean Christopherson <seanjc@google.com> | 2022-11-30 23:36:50 +0000 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-01-24 10:05:22 -0800 |
| commit | a2b07fa7b93321c059af0c6d492cc9a4f1e390aa (patch) | |
| tree | ab7cb392c558816cf4f551952ff603b99723517d /arch/x86/kvm | |
| parent | d81f952aa657b76cea381384bef1fea35c5fd266 (diff) | |
x86/reboot: Disable SVM, not just VMX, when stopping CPUs
Disable SVM and more importantly force GIF=1 when halting a CPU or
rebooting the machine. Similar to VMX, SVM allows software to block
INITs via CLGI, and thus can be problematic for a crash/reboot. The
window for failure is smaller with SVM as INIT is only blocked while
GIF=0, i.e. between CLGI and STGI, but the window does exist.
Fixes: fba4f472b33a ("x86/reboot: Turn off KVM when halting a CPU")
Cc: stable@vger.kernel.org
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20221130233650.1404148-5-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch/x86/kvm')
0 files changed, 0 insertions, 0 deletions