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KVM: PPC: booke: Add watchdog emulation

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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>
This commit is contained in:
Bharat Bhushan
2012-08-08 20:38:19 +00:00
committed by Alexander Graf
parent 7c973a2ebb
commit f61c94bb99
9 changed files with 199 additions and 2 deletions
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3
arch/powerpc/include/asm/kvm_host.h
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@@ -471,6 +471,8 @@ struct kvm_vcpu_arch {
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 @@ struct kvm_vcpu_arch {
u8 osi_needed;
u8 osi_enabled;
u8 papr_enabled;
u8 watchdog_enabled;
u8 sane;
u8 cpu_type;
u8 hcall_needed;