[libvirt] [PATCH v2 6/7] qemu: Forbid MSR features with old QEMU

Ján Tomko jtomko at redhat.com
Thu Jun 20 08:23:33 UTC 2019


On Thu, Jun 20, 2019 at 12:53:41AM +0200, Jiri Denemark wrote:
>Without "unavailable-features" CPU property we cannot properly detect
>whether a specific MSR feature we asked for (either explicitly or
>implicitly via a CPU model) was disabled by QEMU for some reason.
>Because this could break migration, snapshots, and save/restore
>operaions, it's better to just forbid any use of MSR features with QEMU
>which lacks "unavailable-features" CPU property.
>
>Signed-off-by: Jiri Denemark <jdenemar at redhat.com>
>---
> src/qemu/qemu_process.c | 29 ++++++++++++++++++++++++++---
> 1 file changed, 26 insertions(+), 3 deletions(-)
>

Reviewed-by: Ján Tomko <jtomko at redhat.com>

Jano
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