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| author | Sean Christopherson <seanjc@google.com> | 2022-07-08 15:48:10 -0700 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2022-07-08 15:58:16 -0700 |
| commit | f83894b24c2a96fcecdff4858755aa79eb756465 (patch) | |
| tree | 32da1e5dc0c630afb77a239d695eb52966c67f3a /tools/perf/scripts/python | |
| parent | KVM: x86: Initialize number of APIC LVT entries during APIC creation (diff) | |
| download | linux-f83894b24c2a96fcecdff4858755aa79eb756465.tar.gz linux-f83894b24c2a96fcecdff4858755aa79eb756465.zip | |
KVM: x86: Fix handling of APIC LVT updates when userspace changes MCG_CAP
Add a helper to update KVM's in-kernel local APIC in response to MCG_CAP
being changed by userspace to fix multiple bugs. First and foremost,
KVM needs to check that there's an in-kernel APIC prior to dereferencing
vcpu->arch.apic. Beyond that, any "new" LVT entries need to be masked,
and the APIC version register needs to be updated as it reports out the
number of LVT entries.
Fixes: 4b903561ec49 ("KVM: x86: Add Corrected Machine Check Interrupt (CMCI) emulation to lapic.")
Reported-by: syzbot+8cdad6430c24f396f158@syzkaller.appspotmail.com
Cc: Siddh Raman Pant <code@siddh.me>
Cc: Jue Wang <juew@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions