search for: virtio_airq_handler

...*summary_indicators; > + > +static inline u8 *get_summary_indicator(struct airq_info *info) > +{ > + return summary_indicators + info->summary_indicator_idx; > +} > > #define CCW_CMD_SET_VQ 0x13 > #define CCW_CMD_VDEV_RESET 0x33 > @@ -225,7 +231,7 @@ static void virtio_airq_handler(struct airq_struct *airq) > break; > vring_interrupt(0, (void *)airq_iv_get_ptr(info->aiv, ai)); > } > - info->summary_indicator = 0; > + *(get_summary_indicator(info)) = 0; > smp_wmb(); > /* Walk through indicators field, summary indicator not active. *...

...*summary_indicators; > + > +static inline u8 *get_summary_indicator(struct airq_info *info) > +{ > + return summary_indicators + info->summary_indicator_idx; > +} > > #define CCW_CMD_SET_VQ 0x13 > #define CCW_CMD_VDEV_RESET 0x33 > @@ -225,7 +231,7 @@ static void virtio_airq_handler(struct airq_struct *airq) > break; > vring_interrupt(0, (void *)airq_iv_get_ptr(info->aiv, ai)); > } > - info->summary_indicator = 0; > + *(get_summary_indicator(info)) = 0; > smp_wmb(); > /* Walk through indicators field, summary indicator not active. *...

...rq_info *airq_areas[MAX_AIRQ_AREAS]; +static u8 *summary_indicators; + +static inline u8 *get_summary_indicator(struct airq_info *info) +{ + return summary_indicators + info->summary_indicator_idx; +} #define CCW_CMD_SET_VQ 0x13 #define CCW_CMD_VDEV_RESET 0x33 @@ -225,7 +231,7 @@ static void virtio_airq_handler(struct airq_struct *airq) break; vring_interrupt(0, (void *)airq_iv_get_ptr(info->aiv, ai)); } - info->summary_indicator = 0; + *(get_summary_indicator(info)) = 0; smp_wmb(); /* Walk through indicators field, summary indicator not active. */ for (ai = 0;;) { @@ -237,7 +243,8 @@...

...rq_info *airq_areas[MAX_AIRQ_AREAS]; +static u8 *summary_indicators; + +static inline u8 *get_summary_indicator(struct airq_info *info) +{ + return summary_indicators + info->summary_indicator_idx; +} #define CCW_CMD_SET_VQ 0x13 #define CCW_CMD_VDEV_RESET 0x33 @@ -225,7 +231,7 @@ static void virtio_airq_handler(struct airq_struct *airq, bool floating) break; vring_interrupt(0, (void *)airq_iv_get_ptr(info->aiv, ai)); } - info->summary_indicator = 0; + *(get_summary_indicator(info)) = 0; smp_wmb(); /* Walk through indicators field, summary indicator not active. */ for (ai = 0;;) { @@ -...

...rq_info *airq_areas[MAX_AIRQ_AREAS]; +static u8 *summary_indicators; + +static inline u8 *get_summary_indicator(struct airq_info *info) +{ + return summary_indicators + info->summary_indicator_idx; +} #define CCW_CMD_SET_VQ 0x13 #define CCW_CMD_VDEV_RESET 0x33 @@ -225,7 +231,7 @@ static void virtio_airq_handler(struct airq_struct *airq, bool floating) break; vring_interrupt(0, (void *)airq_iv_get_ptr(info->aiv, ai)); } - info->summary_indicator = 0; + *(get_summary_indicator(info)) = 0; smp_wmb(); /* Walk through indicators field, summary indicator not active. */ for (ai = 0;;) { @@ -...

...rq_info *airq_areas[MAX_AIRQ_AREAS]; +static u8 *summary_indicators; + +static inline u8 *get_summary_indicator(struct airq_info *info) +{ + return summary_indicators + info->summary_indicator_idx; +} #define CCW_CMD_SET_VQ 0x13 #define CCW_CMD_VDEV_RESET 0x33 @@ -209,7 +215,7 @@ static void virtio_airq_handler(struct airq_struct *airq, bool floating) break; vring_interrupt(0, (void *)airq_iv_get_ptr(info->aiv, ai)); } - info->summary_indicator = 0; + *(get_summary_indicator(info)) = 0; smp_wmb(); /* Walk through indicators field, summary indicator not active. */ for (ai = 0;;) { @@ -...

...rq_info *airq_areas[MAX_AIRQ_AREAS]; +static u8 *summary_indicators; + +static inline u8 *get_summary_indicator(struct airq_info *info) +{ + return summary_indicators + info->summary_indicator_idx; +} #define CCW_CMD_SET_VQ 0x13 #define CCW_CMD_VDEV_RESET 0x33 @@ -209,7 +215,7 @@ static void virtio_airq_handler(struct airq_struct *airq, bool floating) break; vring_interrupt(0, (void *)airq_iv_get_ptr(info->aiv, ai)); } - info->summary_indicator = 0; + *(get_summary_indicator(info)) = 0; smp_wmb(); /* Walk through indicators field, summary indicator not active. */ for (ai = 0;;) { @@ -...

...t; + >> +static inline u8 *get_summary_indicator(struct airq_info *info) >> +{ >> +??? return summary_indicators + info->summary_indicator_idx; >> +} >> ? #define CCW_CMD_SET_VQ 0x13 >> ? #define CCW_CMD_VDEV_RESET 0x33 >> @@ -225,7 +231,7 @@ static void virtio_airq_handler(struct airq_struct >> *airq) >> ????????????? break; >> ????????? vring_interrupt(0, (void *)airq_iv_get_ptr(info->aiv, ai)); >> ????? } >> -??? info->summary_indicator = 0; >> +??? *(get_summary_indicator(info)) = 0; >> ????? smp_wmb(); >> ???...

...(at least for protected virtualization > guests). > > Signed-off-by: Halil Pasic <pasic at linux.ibm.com> > --- > drivers/s390/virtio/virtio_ccw.c | 24 +++++++++++++++++------- > 1 file changed, 17 insertions(+), 7 deletions(-) (...) > @@ -237,7 +243,8 @@ static void virtio_airq_handler(struct airq_struct *airq) > read_unlock(&info->lock); > } > > -static struct airq_info *new_airq_info(void) > +/* call with airq_areas_lock held */ Hm, where is airq_areas_lock defined? If it was introduced in one of the previous patches, I have missed it. > +static...

...(at least for protected virtualization > guests). > > Signed-off-by: Halil Pasic <pasic at linux.ibm.com> > --- > drivers/s390/virtio/virtio_ccw.c | 24 +++++++++++++++++------- > 1 file changed, 17 insertions(+), 7 deletions(-) (...) > @@ -237,7 +243,8 @@ static void virtio_airq_handler(struct airq_struct *airq) > read_unlock(&info->lock); > } > > -static struct airq_info *new_airq_info(void) > +/* call with airq_areas_lock held */ Hm, where is airq_areas_lock defined? If it was introduced in one of the previous patches, I have missed it. > +static...

...ff-by: Halil Pasic <pasic at linux.ibm.com> > >> --- > >> drivers/s390/virtio/virtio_ccw.c | 24 +++++++++++++++++------- > >> 1 file changed, 17 insertions(+), 7 deletions(-) > > > > (...) > > > >> @@ -237,7 +243,8 @@ static void virtio_airq_handler(struct airq_struct *airq) > >> read_unlock(&info->lock); > >> } > >> > >> -static struct airq_info *new_airq_info(void) > >> +/* call with drivers/s390/virtio/virtio_ccw.cheld */ > > > > Hm, where is airq_areas_lock defined?...

...gt; guests). >> >> Signed-off-by: Halil Pasic <pasic at linux.ibm.com> >> --- >> drivers/s390/virtio/virtio_ccw.c | 24 +++++++++++++++++------- >> 1 file changed, 17 insertions(+), 7 deletions(-) > > (...) > >> @@ -237,7 +243,8 @@ static void virtio_airq_handler(struct airq_struct *airq) >> read_unlock(&info->lock); >> } >> >> -static struct airq_info *new_airq_info(void) >> +/* call with drivers/s390/virtio/virtio_ccw.cheld */ > > Hm, where is airq_areas_lock defined? If it was introduced in one of >...

Hi, here's the guest driver support for adapter interrupts in virtio-ccw. We use one summary indicator per page of indicators. For each device, we try to find a space in an indicator where all of its virtqueues fit. Locking probably needs some more love, but it seems to work fine so far. Cornelia Huck (2): KVM: s390: virtio-ccw: Handle command rejects. KVM: s390: virtio-ccw adapter

Hi, here's the guest driver support for adapter interrupts in virtio-ccw. We use one summary indicator per page of indicators. For each device, we try to find a space in an indicator where all of its virtqueues fit. Locking probably needs some more love, but it seems to work fine so far. Cornelia Huck (2): KVM: s390: virtio-ccw: Handle command rejects. KVM: s390: virtio-ccw adapter

Hi, next version of the guest exploitation of virtio-ccw adapter interrupts. Changes from the last version: - adapt to latest kvm-next - changed housekeeping for indicator locations: we now use cacheline-sized and aligned areas - minor tweaks Cornelia Huck (2): KVM: s390: virtio-ccw: Handle command rejects. KVM: s390: virtio-ccw adapter interrupt support. arch/s390/include/asm/irq.h

Hi, next version of the guest exploitation of virtio-ccw adapter interrupts. Changes from the last version: - adapt to latest kvm-next - changed housekeeping for indicator locations: we now use cacheline-sized and aligned areas - minor tweaks Cornelia Huck (2): KVM: s390: virtio-ccw: Handle command rejects. KVM: s390: virtio-ccw adapter interrupt support. arch/s390/include/asm/irq.h

Enhanced virtualization protection technology may require the use of bounce buffers for I/O. While support for this was built into the virtio core, virtio-ccw wasn't changed accordingly. Some background on technology (not part of this series) and the terminology used. * Protected Virtualization (PV): Protected Virtualization guarantees, that non-shared memory of a guest that operates in PV

Enhanced virtualization protection technology may require the use of bounce buffers for I/O. While support for this was built into the virtio core, virtio-ccw wasn't changed accordingly. Some background on technology (not part of this series) and the terminology used. * Protected Virtualization (PV): Protected Virtualization guarantees, that non-shared memory of a guest that operates in PV

Enhanced virtualization protection technology may require the use of bounce buffers for I/O. While support for this was built into the virtio core, virtio-ccw wasn't changed accordingly. Some background on technology (not part of this series) and the terminology used. * Protected Virtualization (PV): Protected Virtualization guarantees, that non-shared memory of a guest that operates in PV

Enhanced virtualization protection technology may require the use of bounce buffers for I/O. While support for this was built into the virtio core, virtio-ccw wasn't changed accordingly. Some background on technology (not part of this series) and the terminology used. * Protected Virtualization (PV): Protected Virtualization guarantees, that non-shared memory of a guest that operates in PV