diff options
| author | Sean Christopherson <seanjc@google.com> | 2020-12-30 16:26:55 -0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-02-04 05:27:31 -0500 |
| commit | ed72736183c45a413a8d6974dd04be90f514cb6b (patch) | |
| tree | 384fa77cb24ef0cfc9264946e83d459d59249de5 /arch/x86/include | |
| parent | aec511ad153556640fb1de38bfe00c69464f997f (diff) | |
| download | linux-ed72736183c45a413a8d6974dd04be90f514cb6b.tar.gz linux-ed72736183c45a413a8d6974dd04be90f514cb6b.tar.bz2 linux-ed72736183c45a413a8d6974dd04be90f514cb6b.zip | |
x86/reboot: Force all cpus to exit VMX root if VMX is supported
Force all CPUs to do VMXOFF (via NMI shootdown) during an emergency
reboot if VMX is _supported_, as VMX being off on the current CPU does
not prevent other CPUs from being in VMX root (post-VMXON). This fixes
a bug where a crash/panic reboot could leave other CPUs in VMX root and
prevent them from being woken via INIT-SIPI-SIPI in the new kernel.
Fixes: d176720d34c7 ("x86: disable VMX on all CPUs on reboot")
Cc: stable@vger.kernel.org
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: David P. Reed <dpreed@deepplum.com>
[sean: reworked changelog and further tweaked comment]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20201231002702.2223707-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include')
0 files changed, 0 insertions, 0 deletions