KVM: x86: Fully re-initialize supported_mce_cap on vendor module load

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Effectively reset supported_mce_cap on vendor module load to ensure that
capabilities aren't unintentionally preserved across module reload, e.g.
if kvm-intel.ko added a module param to control LMCE support, or if
someone somehow managed to load a vendor module that doesn't support LMCE
after loading and unloading kvm-intel.ko.

Practically speaking, this bug is a non-issue as kvm-intel.ko doesn't have
a module param for LMCE, and there is no system in the world that supports
both kvm-intel.ko and kvm-amd.ko.

Fixes: c45dcc71b7 ("KVM: VMX: enable guest access to LMCE related MSRs")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Message-ID: <20240423165328.2853870-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2024-04-23 09:53:27 -07:00 • committed by Paolo Bonzini

parent c43ad19045

commit 555485bd86

1 changed files with 2 additions and 3 deletions

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arch/x86/kvm/x86.c

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