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| author | Paolo Bonzini | 2018-07-26 13:01:52 +0200 |
|---|---|---|
| committer | Paolo Bonzini | 2018-08-06 17:32:01 +0200 |
| commit | 44883f01fe6ae436a8604c47d8435276fef369b0 (patch) | |
| tree | d2339b15742e5f66afb5ea7bf1e825710ac175dd /tools | |
| parent | KVM: vmx: remove save/restore of host BNDCGFS MSR (diff) | |
| download | kernel-qcow2-linux-44883f01fe6ae436a8604c47d8435276fef369b0.tar.gz kernel-qcow2-linux-44883f01fe6ae436a8604c47d8435276fef369b0.tar.xz kernel-qcow2-linux-44883f01fe6ae436a8604c47d8435276fef369b0.zip | |
KVM: x86: ensure all MSRs can always be KVM_GET/SET_MSR'd
Some of the MSRs returned by GET_MSR_INDEX_LIST currently cannot be sent back
to KVM_GET_MSR and/or KVM_SET_MSR; either they can never be sent back, or you
they are only accepted under special conditions. This makes the API a pain to
use.
To avoid this pain, this patch makes it so that the result of the get-list
ioctl can always be used for host-initiated get and set. Since we don't have
a separate way to check for read-only MSRs, this means some Hyper-V MSRs are
ignored when written. Arguably they should not even be in the result of
GET_MSR_INDEX_LIST, but I am leaving there in case userspace is using the
outcome of GET_MSR_INDEX_LIST to derive the support for the corresponding
Hyper-V feature.
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions