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: Liu Yu <yu.liu@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
[bharat.bhushan@freescale.com: reworked patch]
Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
[agraf: adjust to new request framework]
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index 4a5ec8f..51b0ccd 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -471,6 +471,8 @@
ulong fault_esr;
ulong queued_dear;
ulong queued_esr;
+ spinlock_t wdt_lock;
+ struct timer_list wdt_timer;
u32 tlbcfg[4];
u32 mmucfg;
u32 epr;
@@ -486,6 +488,7 @@
u8 osi_needed;
u8 osi_enabled;
u8 papr_enabled;
+ u8 watchdog_enabled;
u8 sane;
u8 cpu_type;
u8 hcall_needed;