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| author | Igor Mammedov <imammedo@redhat.com> | 2020-09-23 05:46:42 -0400 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-09-29 02:15:24 -0400 |
| commit | b48ad7c02ba77c151bb8b10db6418615fa4ff458 (patch) | |
| tree | 5584208ca749f4acef97ac59e89db1e20db3e95b /include/standard-headers/linux/input-event-codes.h | |
| parent | c5be7517d658ae787de6d0ccc8e93db01fdf60a1 (diff) | |
| download | focaccia-qemu-b48ad7c02ba77c151bb8b10db6418615fa4ff458.tar.gz focaccia-qemu-b48ad7c02ba77c151bb8b10db6418615fa4ff458.zip | |
x86: cpuhp: refuse cpu hot-unplug request earlier if not supported
CPU hot-unplug with SMM requires firmware participation to prevent guest crash (i.e. CPU can be removed only after OS _and_ firmware were prepared for the action). Previous patches introduced ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT feature bit, which is advertised by firmware when it has support for CPU hot-unplug. Use it to check if guest is able to handle unplug and make device_del fail gracefully if hot-unplug feature hasn't been negotiated. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Tested-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Message-Id: <20200923094650.1301166-4-imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/standard-headers/linux/input-event-codes.h')
0 files changed, 0 insertions, 0 deletions