diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2020-02-11 18:55:16 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-02-12 16:29:40 +0100 |
| commit | 6702514814c7e7b4cbf179624539b5f38c72740b (patch) | |
| tree | 876fc79afd7e4269509f4cf3686633e9892f46e3 /include | |
| parent | 9028c75c9d08be303ccc425bfe3d3b23d8f4cac7 (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 'include')
0 files changed, 0 insertions, 0 deletions