| Message ID | 20180125170608.38276-2-borntraeger@de.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 25.01.2018 18:06, Christian Borntraeger wrote: > From: Michael Mueller <mimu@linux.vnet.ibm.com> > > The patch implements routines to access the GISA to test and modify > its Interruption Pending Mask (IPM) from the host side. > > Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> > Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com> > Reviewed-by: Halil Pasic <pasic@linux.vnet.ibm.com> > Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> > Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> > --- > arch/s390/kvm/interrupt.c | 28 ++++++++++++++++++++++++++++ > 1 file changed, 28 insertions(+) > > diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c > index b7b2865..ec50d42 100644 > --- a/arch/s390/kvm/interrupt.c > +++ b/arch/s390/kvm/interrupt.c > @@ -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 | > Reviewed-by: David Hildenbrand <david@redhat.com>
On Thu, 25 Jan 2018 18:06:05 +0100 Christian Borntraeger <borntraeger@de.ibm.com> wrote: > From: Michael Mueller <mimu@linux.vnet.ibm.com> > > The patch implements routines to access the GISA to test and modify > its Interruption Pending Mask (IPM) from the host side. > > Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> > Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com> > Reviewed-by: Halil Pasic <pasic@linux.vnet.ibm.com> > Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> > Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> > --- > arch/s390/kvm/interrupt.c | 28 ++++++++++++++++++++++++++++ > 1 file changed, 28 insertions(+) Reviewed-by: Cornelia Huck <cohuck@redhat.com>
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index b7b2865..ec50d42 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -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 |