Merge branch 'kvm-updates/3.4' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Avi Kivity:
 "Changes include timekeeping improvements, support for assigning host
  PCI devices that share interrupt lines, s390 user-controlled guests, a
  large ppc update, and random fixes."

This is with the sign-off's fixed, hopefully next merge window we won't
have rebased commits.

* 'kvm-updates/3.4' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (130 commits)
  KVM: Convert intx_mask_lock to spin lock
  KVM: x86: fix kvm_write_tsc() TSC matching thinko
  x86: kvmclock: abstract save/restore sched_clock_state
  KVM: nVMX: Fix erroneous exception bitmap check
  KVM: Ignore the writes to MSR_K7_HWCR(3)
  KVM: MMU: make use of ->root_level in reset_rsvds_bits_mask
  KVM: PMU: add proper support for fixed counter 2
  KVM: PMU: Fix raw event check
  KVM: PMU: warn when pin control is set in eventsel msr
  KVM: VMX: Fix delayed load of shared MSRs
  KVM: use correct tlbs dirty type in cmpxchg
  KVM: Allow host IRQ sharing for assigned PCI 2.3 devices
  KVM: Ensure all vcpus are consistent with in-kernel irqchip settings
  KVM: x86 emulator: Allow PM/VM86 switch during task switch
  KVM: SVM: Fix CPL updates
  KVM: x86 emulator: VM86 segments must have DPL 3
  KVM: x86 emulator: Fix task switch privilege checks
  arch/powerpc/kvm/book3s_hv.c: included linux/sched.h twice
  KVM: x86 emulator: correctly mask pmc index bits in RDPMC instruction emulation
  KVM: mmu_notifier: Flush TLBs before releasing mmu_lock
  ...

1 files changed, 12 insertions, 6 deletions

diff --git a/arch/powerpc/kvm/booke_interrupts.S b/arch/powerpc/kvm/booke_interrupts.S
index 42f2fb1f66e..10d8ef602e5 100644
--- a/arch/powerpc/kvm/booke_interrupts.S
+++ b/arch/powerpc/kvm/booke_interrupts.S
@@ -402,19 +402,25 @@ lightweight_exit:
 	/* Save vcpu pointer for the exception handlers. */
 	mtspr	SPRN_SPRG_WVCPU, r4
 
+	lwz	r5, VCPU_SHARED(r4)
+
 	/* Can't switch the stack pointer until after IVPR is switched,
 	 * because host interrupt handlers would get confused. */
 	lwz	r1, VCPU_GPR(r1)(r4)
 
-	/* Host interrupt handlers may have clobbered these guest-readable
-	 * SPRGs, so we need to reload them here with the guest's values. */
-	lwz	r3, VCPU_SPRG4(r4)
+	/*
+	 * Host interrupt handlers may have clobbered these
+	 * guest-readable SPRGs, or the guest kernel may have
+	 * written directly to the shared area, so we
+	 * need to reload them here with the guest's values.
+	 */
+	lwz	r3, VCPU_SHARED_SPRG4(r5)
 	mtspr	SPRN_SPRG4W, r3
-	lwz	r3, VCPU_SPRG5(r4)
+	lwz	r3, VCPU_SHARED_SPRG5(r5)
 	mtspr	SPRN_SPRG5W, r3
-	lwz	r3, VCPU_SPRG6(r4)
+	lwz	r3, VCPU_SHARED_SPRG6(r5)
 	mtspr	SPRN_SPRG6W, r3
-	lwz	r3, VCPU_SPRG7(r4)
+	lwz	r3, VCPU_SHARED_SPRG7(r5)
 	mtspr	SPRN_SPRG7W, r3
 
 #ifdef CONFIG_KVM_EXIT_TIMING