KVM: s390: implement GISA IPM related primitives (d77e6414) · Commits · 戴 / test

arch/s390/kvm/interrupt.c

+28 −0

Original line number	Diff line number	Diff line
		@@ -203,6 +203,34 @@ static inline u8 int_word_to_isc(u32 int_word)
		return (int_word & 0x38000000) >> 27;
		}

		/*
		* To use atomic bitmap functions, we have to provide a bitmap address
		* that is u64 aligned. However, the ipm might be u32 aligned.
		* Therefore, we logically start the bitmap at the very beginning of the
		* struct and fixup the bit number.
		*/
		#define IPM_BIT_OFFSET (offsetof(struct kvm_s390_gisa, ipm) * BITS_PER_BYTE)

		static inline void kvm_s390_gisa_set_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
		{
		set_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
		}

		static inline u8 kvm_s390_gisa_get_ipm(struct kvm_s390_gisa *gisa)
		{
		return READ_ONCE(gisa->ipm);
		}

		static inline void kvm_s390_gisa_clear_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
		{
		clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
		}

		static inline int kvm_s390_gisa_tac_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
		{
		return test_and_clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
		}

		static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu)
		{
		return vcpu->kvm->arch.float_int.pending_irqs \|