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authorPaolo Bonzini <pbonzini@redhat.com>2020-02-11 18:55:16 +0100
committerPaolo Bonzini <pbonzini@redhat.com>2020-02-12 16:29:40 +0100
commit6702514814c7e7b4cbf179624539b5f38c72740b (patch)
tree876fc79afd7e4269509f4cf3686633e9892f46e3 /scripts
parent9028c75c9d08be303ccc425bfe3d3b23d8f4cac7 (diff)
target/i386: check for availability of MSR_IA32_UCODE_REV as an emulated MSR
Even though MSR_IA32_UCODE_REV has been available long before Linux 5.6, which added it to the emulated MSR list, a bug caused the microcode version to revert to 0x100000000 on INIT. As a result, processors other than the bootstrap processor would not see the host microcode revision; some Windows version complain loudly about this and crash with a fairly explicit MICROCODE REVISION MISMATCH error. [If running 5.6 prereleases, the kernel fix "KVM: x86: do not reset microcode version on INIT or RESET" should also be applied.] Reported-by: Alex Williamson <alex.williamson@redhat.com> Message-id: <20200211175516.10716-1-pbonzini@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'scripts')
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