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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2008-06-20 15:24:18 +0200 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-07-25 12:06:07 +1000 |
| commit | faeba830b086bc9e58748869054e994cb09693cd (patch) | |
| tree | 5d2f2beb6b3ae012c7eedaa48bc1845cb156945f /drivers/s390/kvm | |
| parent | 7721c494a28e06543a3d6aa412957aa783a4a531 (diff) | |
| download | lwn-faeba830b086bc9e58748869054e994cb09693cd.tar.gz lwn-faeba830b086bc9e58748869054e994cb09693cd.zip | |
s390: use virtio_console for KVM on s390
This patch enables virtio_console as the default console on kvm for
s390. We currently use the same notify hack as lguest for early
console output. I will try to address this for lguest and s390 later.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'drivers/s390/kvm')
| -rw-r--r-- | drivers/s390/kvm/kvm_virtio.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/s390/kvm/kvm_virtio.c b/drivers/s390/kvm/kvm_virtio.c index 5ab34340919b..d41f234bb2c2 100644 --- a/drivers/s390/kvm/kvm_virtio.c +++ b/drivers/s390/kvm/kvm_virtio.c @@ -15,6 +15,7 @@ #include <linux/err.h> #include <linux/virtio.h> #include <linux/virtio_config.h> +#include <linux/virtio_console.h> #include <linux/interrupt.h> #include <linux/virtio_ring.h> #include <linux/pfn.h> @@ -333,6 +334,25 @@ static int __init kvm_devices_init(void) return 0; } +/* code for early console output with virtio_console */ +static __init int early_put_chars(u32 vtermno, const char *buf, int count) +{ + char scratch[17]; + unsigned int len = count; + + if (len > sizeof(scratch) - 1) + len = sizeof(scratch) - 1; + scratch[len] = '\0'; + memcpy(scratch, buf, len); + kvm_hypercall1(KVM_S390_VIRTIO_NOTIFY, __pa(scratch)); + return len; +} + +void s390_virtio_console_init(void) +{ + virtio_cons_early_init(early_put_chars); +} + /* * We do this after core stuff, but before the drivers. */ |