KVM: PPC: booke: Add watchdog emulation
This patch adds the watchdog emulation in KVM. The watchdog emulation is enabled by KVM_ENABLE_CAP(KVM_CAP_PPC_BOOKE_WATCHDOG) ioctl. The kernel timer are used for watchdog emulation and emulates h/w watchdog state machine. On watchdog timer expiry, it exit to QEMU if TCR.WRC is non ZERO. QEMU can reset/shutdown etc depending upon how it is configured. Signed-off-by: NLiu Yu <yu.liu@freescale.com> Signed-off-by: NScott Wood <scottwood@freescale.com> [bharat.bhushan@freescale.com: reworked patch] Signed-off-by: NBharat Bhushan <bharat.bhushan@freescale.com> [agraf: adjust to new request framework] Signed-off-by: NAlexander Graf <agraf@suse.de>
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