leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

KVM: s390: abstract adapter interruption word generation from ISC

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

Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Michael Mueller 2017-08-31 11:10:28 +02:00 committed by Christian Borntraeger
parent d7c5cb0105
commit 2496c8e7fe
1 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
arch/s390/kvm/interrupt.c
View File

@ -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;