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authorBharat Bhushan <r65777@freescale.com>2012-08-08 20:38:19 +0000
committerAlexander Graf <agraf@suse.de>2012-10-05 23:38:47 +0200
commitf61c94bb99ca4253ac5dd57750e1af209a4beb7a (patch)
tree348d15c584a683cd805ed71ed5c8a81848d24e70 /arch/powerpc/kvm/powerpc.c
parent7c973a2ebb8fb9c8ee2ae9647f9ad7b0ad58a3e6 (diff)
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>
Diffstat (limited to 'arch/powerpc/kvm/powerpc.c')
-rw-r--r--arch/powerpc/kvm/powerpc.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 54b12af577d..0ffd7d17adc 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -300,6 +300,7 @@ int kvm_dev_ioctl_check_extension(long ext)
switch (ext) {
#ifdef CONFIG_BOOKE
case KVM_CAP_PPC_BOOKE_SREGS:
+ case KVM_CAP_PPC_BOOKE_WATCHDOG:
#else
case KVM_CAP_PPC_SEGSTATE:
case KVM_CAP_PPC_HIOR:
@@ -476,6 +477,8 @@ enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
+ int ret;
+
hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
@@ -484,13 +487,14 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
#ifdef CONFIG_KVM_EXIT_TIMING
mutex_init(&vcpu->arch.exit_timing_lock);
#endif
-
- return 0;
+ ret = kvmppc_subarch_vcpu_init(vcpu);
+ return ret;
}
void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
{
kvmppc_mmu_destroy(vcpu);
+ kvmppc_subarch_vcpu_uninit(vcpu);
}
void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
@@ -735,6 +739,12 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
r = 0;
vcpu->arch.papr_enabled = true;
break;
+#ifdef CONFIG_BOOKE
+ case KVM_CAP_PPC_BOOKE_WATCHDOG:
+ r = 0;
+ vcpu->arch.watchdog_enabled = true;
+ break;
+#endif
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
case KVM_CAP_SW_TLB: {
struct kvm_config_tlb cfg;