path: root/drivers/s390/kvm/Makefile
diff options
authorChristian Borntraeger <borntraeger@de.ibm.com>2008-03-25 18:47:46 +0100
committerAvi Kivity <avi@qumranet.com>2008-04-27 12:00:51 +0300
commite976a2b997fc4ad70ccc53acfe62811c4aaec851 (patch)
tree55994dda8046c9220c345a69b11d849323309703 /drivers/s390/kvm/Makefile
parents390: KVM guest: detect when running on kvm (diff)
s390: KVM guest: virtio device support, and kvm hypercalls
This patch implements kvm guest kernel support for paravirtualized devices and contains two parts: o a basic virtio stub using virtio_ring and external interrupts and hypercalls o full hypercall implementation in kvm_para.h Currently we dont have PCI on s390. Making virtio_pci usable for s390 seems more complicated that providing an own stub. This virtio stub is similar to the lguest one, the memory for the descriptors and the device detection is made via additional mapped memory on top of the guest storage. We use an external interrupt with extint code 0x2603 for host->guest notification. The hypercall definition uses the diag instruction for issuing a hypercall. The parameters are written in R2-R7, the hypercall number is written in R1. This is similar to the system call ABI (svc) which can use R1 for the number and R2-R6 for the parameters. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/s390/kvm/Makefile')
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/s390/kvm/Makefile b/drivers/s390/kvm/Makefile
new file mode 100644
index 000000000000..4a5ec39f9ca6
--- /dev/null
+++ b/drivers/s390/kvm/Makefile
@@ -0,0 +1,9 @@
+# Makefile for kvm guest drivers on s390
+# Copyright IBM Corp. 2008
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License (version 2 only)
+# as published by the Free Software Foundation.
+obj-$(CONFIG_VIRTIO) += kvm_virtio.o