On 13/05/2022 21.14, Matthew Rosato wrote:
When doing device passthrough where interrupts are being forwarded from host to guest, we wish to use a pinned section of guest memory as the vector (the same memory used by the guest as the vector). To accomplish this, add a new parameter for airq_iv_create which allows passing an existing vector to be used instead of allocating a new one. The caller is responsible for ensuring the vector is pinned in memory as well as for unpinning the memory when the vector is no longer needed. A subsequent patch will use this new parameter for zPCI interpretation. Reviewed-by: Pierre Morel <pmorel@xxxxxxxxxxxxx> Reviewed-by: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx> Acked-by: Cornelia Huck <cohuck@xxxxxxxxxx> Signed-off-by: Matthew Rosato <mjrosato@xxxxxxxxxxxxx> --- arch/s390/include/asm/airq.h | 4 +++- arch/s390/pci/pci_irq.c | 8 ++++---- drivers/s390/cio/airq.c | 10 +++++++--- drivers/s390/virtio/virtio_ccw.c | 2 +- 4 files changed, 15 insertions(+), 9 deletions(-)
Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx>
