From e976a2b997fc4ad70ccc53acfe62811c4aaec851 Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Tue, 25 Mar 2008 18:47:46 +0100 Subject: 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 Acked-by: Martin Schwidefsky Signed-off-by: Carsten Otte Signed-off-by: Avi Kivity --- drivers/s390/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/s390/Makefile') diff --git a/drivers/s390/Makefile b/drivers/s390/Makefile index 5a88870..4f4e7cf 100644 --- a/drivers/s390/Makefile +++ b/drivers/s390/Makefile @@ -5,7 +5,7 @@ CFLAGS_sysinfo.o += -Iinclude/math-emu -Iarch/s390/math-emu -w obj-y += s390mach.o sysinfo.o s390_rdev.o -obj-y += cio/ block/ char/ crypto/ net/ scsi/ +obj-y += cio/ block/ char/ crypto/ net/ scsi/ kvm/ drivers-y += drivers/s390/built-in.o -- cgit v1.1