Merge branch kvm-arm64/burn-the-flags into kvmarm-master/next

* kvm-arm64/burn-the-flags:
  : .
  : Rework the per-vcpu flags to make them more manageable,
  : splitting them in different sets that have specific
  : uses:
  :
  : - configuration flags
  : - input to the world-switch
  : - state bookkeeping for the kernel itself
  :
  : The FP tracking is also simplified and tracked outside
  : of the flags as a separate state.
  : .
  KVM: arm64: Move the handling of !FP outside of the fast path
  KVM: arm64: Document why pause cannot be turned into a flag
  KVM: arm64: Reduce the size of the vcpu flag members
  KVM: arm64: Add build-time sanity checks for flags
  KVM: arm64: Warn when PENDING_EXCEPTION and INCREMENT_PC are set together
  KVM: arm64: Convert vcpu sysregs_loaded_on_cpu to a state flag
  KVM: arm64: Kill unused vcpu flags field
  KVM: arm64: Move vcpu WFIT flag to the state flag set
  KVM: arm64: Move vcpu ON_UNSUPPORTED_CPU flag to the state flag set
  KVM: arm64: Move vcpu SVE/SME flags to the state flag set
  KVM: arm64: Move vcpu debug/SPE/TRBE flags to the input flag set
  KVM: arm64: Move vcpu PC/Exception flags to the input flag set
  KVM: arm64: Move vcpu configuration flags into their own set
  KVM: arm64: Add three sets of flags to the vcpu state
  KVM: arm64: Add helpers to manipulate vcpu flags among a set
  KVM: arm64: Move FP state ownership from flag to a tristate
  KVM: arm64: Drop FP_FOREIGN_STATE from the hypervisor code

Signed-off-by: Marc Zyngier <[email protected]>

1 files changed, 9 insertions, 3 deletions

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index a0188144a122..8522eb7f5bc8 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -330,6 +330,12 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
 
 	vcpu->arch.mmu_page_cache.gfp_zero = __GFP_ZERO;
 
+	/*
+	 * Default value for the FP state, will be overloaded at load
+	 * time if we support FP (pretty likely)
+	 */
+	vcpu->arch.fp_state = FP_STATE_FREE;
+
 	/* Set up the timer */
 	kvm_timer_vcpu_init(vcpu);
 
@@ -659,7 +665,7 @@ void kvm_vcpu_wfi(struct kvm_vcpu *vcpu)
 	preempt_enable();
 
 	kvm_vcpu_halt(vcpu);
-	vcpu->arch.flags &= ~KVM_ARM64_WFIT;
+	vcpu_clear_flag(vcpu, IN_WFIT);
 	kvm_clear_request(KVM_REQ_UNHALT, vcpu);
 
 	preempt_disable();
@@ -1015,8 +1021,8 @@ out:
 	 * the vcpu state. Note that this relies on __kvm_adjust_pc()
 	 * being preempt-safe on VHE.
 	 */
-	if (unlikely(vcpu->arch.flags & (KVM_ARM64_PENDING_EXCEPTION |
-					 KVM_ARM64_INCREMENT_PC)))
+	if (unlikely(vcpu_get_flag(vcpu, PENDING_EXCEPTION) ||
+		     vcpu_get_flag(vcpu, INCREMENT_PC)))
 		kvm_call_hyp(__kvm_adjust_pc, vcpu);
 
 	vcpu_put(vcpu);