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Commit 2496c8e7 authored by Michael Mueller's avatar Michael Mueller Committed by Christian Borntraeger
Browse files

KVM: s390: abstract adapter interruption word generation from ISC 



The function isc_to_int_word() allows the generation of interruption
words for adapter interrupts.

Signed-off-by: default avatarMichael Mueller <mimu@linux.vnet.ibm.com>
Reviewed-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: default avatarCornelia Huck <cohuck@redhat.com>
Reviewed-by: default avatarDavid Hildenbrand <david@redhat.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent d7c5cb01

arch/s390/kvm/interrupt.c

+7 −2
Original line number Diff line number Diff line
@@ -198,6 +198,11 @@ static uint64_t isc_to_isc_bits(int isc) 
	return (0x80 >> isc) << 24;

}



static inline u32 isc_to_int_word(u8 isc)

{

	return ((u32)isc << 27) | 0x80000000;

}



static inline u8 int_word_to_isc(u32 int_word)

{

	return (int_word & 0x38000000) >> 27;
@@ -992,7 +997,7 @@ static int __must_check __deliver_io(struct kvm_vcpu *vcpu, 
		 */

		VCPU_EVENT(vcpu, 4, "%s isc %u", "deliver: I/O (AI/gisa)", isc);

		memset(&io, 0, sizeof(io));

		io.io_int_word = (isc << 27) | 0x80000000;

		io.io_int_word = isc_to_int_word(isc);

		vcpu->stat.deliver_io_int++;

		trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,

			KVM_S390_INT_IO(1, 0, 0, 0),
@@ -2299,7 +2304,7 @@ static int kvm_s390_inject_airq(struct kvm *kvm, 
	struct kvm_s390_interrupt s390int = {

		.type = KVM_S390_INT_IO(1, 0, 0, 0),

		.parm = 0,

		.parm64 = (adapter->isc << 27) | 0x80000000,

		.parm64 = isc_to_int_word(adapter->isc),

	};

	int ret = 0;