Merge branch 'kvm-updates/2.6.28' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm

* 'kvm-updates/2.6.28' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm:
  KVM: ia64: Makefile fix for forcing to re-generate asm-offsets.h
  KVM: Future-proof device assignment ABI
  KVM: ia64: Fix halt emulation logic
  KVM: Fix guest shared interrupt with in-kernel irqchip
  KVM: MMU: sync root on paravirt TLB flush

14 files changed, 138 insertions, 56 deletions

diff --git a/arch/ia64/include/asm/kvm_host.h b/arch/ia64/include/asm/kvm_host.h
index 85db124d37f..c60d324da54 100644
--- a/arch/ia64/include/asm/kvm_host.h
+++ b/arch/ia64/include/asm/kvm_host.h
@@ -365,7 +365,8 @@ struct kvm_vcpu_arch {
         long itc_offset;
         unsigned long itc_check;
         unsigned long timer_check;
-        unsigned long timer_pending;
+        unsigned int timer_pending;
+        unsigned int timer_fired;
 
         unsigned long vrr[8];
         unsigned long ibr[8];
@@ -417,6 +418,9 @@ struct kvm_arch {
         struct list_head assigned_dev_head;
         struct dmar_domain *intel_iommu_domain;
         struct hlist_head irq_ack_notifier_list;
+
+        unsigned long irq_sources_bitmap;
+        unsigned long irq_states[KVM_IOAPIC_NUM_PINS];
 };
 
 union cpuid3_t {
diff --git a/arch/ia64/kvm/Makefile b/arch/ia64/kvm/Makefile
index cf37f8f490c..3ab4d6d5070 100644
--- a/arch/ia64/kvm/Makefile
+++ b/arch/ia64/kvm/Makefile
@@ -29,13 +29,18 @@ define cmd_offsets
          echo ""; \
          echo "#endif" ) > $@
 endef
+
 # We use internal rules to avoid the "is up to date" message from make
-arch/ia64/kvm/asm-offsets.s: arch/ia64/kvm/asm-offsets.c
+arch/ia64/kvm/asm-offsets.s: arch/ia64/kvm/asm-offsets.c \
+                        $(wildcard $(srctree)/arch/ia64/include/asm/*.h)\
+                        $(wildcard $(srctree)/include/linux/*.h)
         $(call if_changed_dep,cc_s_c)
 
 $(obj)/$(offsets-file): arch/ia64/kvm/asm-offsets.s
         $(call cmd,offsets)
 
+FORCE : $(obj)/$(offsets-file)
+
 #
 # Makefile for Kernel-based Virtual Machine module
 #
@@ -53,7 +58,6 @@ endif
 kvm-objs := $(common-objs) kvm-ia64.o kvm_fw.o
 obj-$(CONFIG_KVM) += kvm.o
 
-FORCE : $(obj)/$(offsets-file)
 EXTRA_CFLAGS_vcpu.o += -mfixed-range=f2-f5,f12-f127
 kvm-intel-objs = vmm.o vmm_ivt.o trampoline.o vcpu.o optvfault.o mmio.o \
         vtlb.o process.o
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index a312c9e9b9e..3caac477de9 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -385,6 +385,7 @@ static int handle_global_purge(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
         struct kvm *kvm = vcpu->kvm;
         struct call_data call_data;
         int i;
+
         call_data.ptc_g_data = p->u.ptc_g_data;
 
         for (i = 0; i < KVM_MAX_VCPUS; i++) {
@@ -418,33 +419,41 @@ int kvm_emulate_halt(struct kvm_vcpu *vcpu)
         ktime_t kt;
         long itc_diff;
         unsigned long vcpu_now_itc;
-
         unsigned long expires;
         struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
         unsigned long cyc_per_usec = local_cpu_data->cyc_per_usec;
         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 
-        vcpu_now_itc = ia64_getreg(_IA64_REG_AR_ITC) + vcpu->arch.itc_offset;
+        if (irqchip_in_kernel(vcpu->kvm)) {
 
-        if (time_after(vcpu_now_itc, vpd->itm)) {
-                vcpu->arch.timer_check = 1;
-                return 1;
-        }
-        itc_diff = vpd->itm - vcpu_now_itc;
-        if (itc_diff < 0)
-                itc_diff = -itc_diff;
+                vcpu_now_itc = ia64_getreg(_IA64_REG_AR_ITC) + vcpu->arch.itc_offset;
 
-        expires = div64_u64(itc_diff, cyc_per_usec);
-        kt = ktime_set(0, 1000 * expires);
-        vcpu->arch.ht_active = 1;
-        hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
+                if (time_after(vcpu_now_itc, vpd->itm)) {
+                        vcpu->arch.timer_check = 1;
+                        return 1;
+                }
+                itc_diff = vpd->itm - vcpu_now_itc;
+                if (itc_diff < 0)
+                        itc_diff = -itc_diff;
+
+                expires = div64_u64(itc_diff, cyc_per_usec);
+                kt = ktime_set(0, 1000 * expires);
+
+                down_read(&vcpu->kvm->slots_lock);
+                vcpu->arch.ht_active = 1;
+                hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
 
-        if (irqchip_in_kernel(vcpu->kvm)) {
                 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
                 kvm_vcpu_block(vcpu);
                 hrtimer_cancel(p_ht);
                 vcpu->arch.ht_active = 0;
 
+                if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests))
+                        if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
+                                vcpu->arch.mp_state =
+                                        KVM_MP_STATE_RUNNABLE;
+                up_read(&vcpu->kvm->slots_lock);
+
                 if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE)
                         return -EINTR;
                 return 1;
@@ -484,10 +493,6 @@ static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu,
 static const int kvm_vti_max_exit_handlers =
                 sizeof(kvm_vti_exit_handlers)/sizeof(*kvm_vti_exit_handlers);
 
-static void kvm_prepare_guest_switch(struct kvm_vcpu *vcpu)
-{
-}
-
 static uint32_t kvm_get_exit_reason(struct kvm_vcpu *vcpu)
 {
         struct exit_ctl_data *p_exit_data;
@@ -600,8 +605,6 @@ static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 
 again:
         preempt_disable();
-
-        kvm_prepare_guest_switch(vcpu);
         local_irq_disable();
 
         if (signal_pending(current)) {
@@ -614,7 +617,7 @@ again:
 
         vcpu->guest_mode = 1;
         kvm_guest_enter();
-
+        down_read(&vcpu->kvm->slots_lock);
         r = vti_vcpu_run(vcpu, kvm_run);
         if (r < 0) {
                 local_irq_enable();
@@ -634,9 +637,8 @@ again:
          * But we need to prevent reordering, hence this barrier():
          */
         barrier();
-
         kvm_guest_exit();
-
+        up_read(&vcpu->kvm->slots_lock);
         preempt_enable();