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| author |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2008-05-06 17:38:30 +0300 |
|---|---|---|
| committer |   Avi Kivity <avi@qumranet.com> | 2008-05-18 14:34:15 +0300 |
| commit | 5ca9fd54e3d75489ff9c70d7af6e0b9a390dd656 (patch) | |
| tree | 9102dbf1e9f0ba52b162c10bc3d4183a044b604a /drivers/s390/kvm/kvm_virtio.c | |
| parent | KVM: x86 emulator: fix writes to registers with modrm encodings (diff) | |
| download | linux-dev-5ca9fd54e3d75489ff9c70d7af6e0b9a390dd656.tar.xz linux-dev-5ca9fd54e3d75489ff9c70d7af6e0b9a390dd656.zip | |
s390: KVM guest: fix compile error
Fix kvm compile error:
Commit c45a6816c19dee67b8f725e6646d428901a6dc24
(virtio: explicit advertisement of driver features)
and commit e976a2b997fc4ad70ccc53acfe62811c4aaec851
(s390: KVM guest: virtio device support, and kvm hypercalls)
don't like each other:
CC drivers/s390/kvm/kvm_virtio.o
drivers/s390/kvm/kvm_virtio.c:224: error: unknown field 'feature' specified in initializer
drivers/s390/kvm/kvm_virtio.c:224: warning: initialization from incompatible pointer type
make[3]: *** [drivers/s390/kvm/kvm_virtio.o] Error 1
Cc: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/s390/kvm/kvm_virtio.c')
| -rw-r--r-- | drivers/s390/kvm/kvm_virtio.c | 40 |
1 files changed, 23 insertions, 17 deletions
diff --git a/drivers/s390/kvm/kvm_virtio.c b/drivers/s390/kvm/kvm_virtio.c index 47a7e6200b26..9f55ce6f3c78 100644 --- a/drivers/s390/kvm/kvm_virtio.c +++ b/drivers/s390/kvm/kvm_virtio.c @@ -78,27 +78,32 @@ static unsigned desc_size(const struct kvm_device_desc *desc) + desc->config_len; } -/* - * This tests (and acknowleges) a feature bit. - */ -static bool kvm_feature(struct virtio_device *vdev, unsigned fbit) +/* This gets the device's feature bits. */ +static u32 kvm_get_features(struct virtio_device *vdev) { + unsigned int i; + u32 features = 0; struct kvm_device_desc *desc = to_kvmdev(vdev)->desc; - u8 *features; + u8 *in_features = kvm_vq_features(desc); - if (fbit / 8 > desc->feature_len) - return false; + for (i = 0; i < min(desc->feature_len * 8, 32); i++) + if (in_features[i / 8] & (1 << (i % 8))) + features |= (1 << i); + return features; +} - features = kvm_vq_features(desc); - if (!(features[fbit / 8] & (1 << (fbit % 8)))) - return false; +static void kvm_set_features(struct virtio_device *vdev, u32 features) +{ + unsigned int i; + struct kvm_device_desc *desc = to_kvmdev(vdev)->desc; + /* Second half of bitmap is features we accept. */ + u8 *out_features = kvm_vq_features(desc) + desc->feature_len; - /* - * We set the matching bit in the other half of the bitmap to tell the - * Host we want to use this feature. - */ - features[desc->feature_len + fbit / 8] |= (1 << (fbit % 8)); - return true; + memset(out_features, 0, desc->feature_len); + for (i = 0; i < min(desc->feature_len * 8, 32); i++) { + if (features & (1 << i)) + out_features[i / 8] |= (1 << (i % 8)); + } } /* @@ -221,7 +226,8 @@ static void kvm_del_vq(struct virtqueue *vq) * The config ops structure as defined by virtio config */ static struct virtio_config_ops kvm_vq_configspace_ops = { - .feature = kvm_feature, + .get_features = kvm_get_features, + .set_features = kvm_set_features, .get = kvm_get, .set = kvm_set, .get_status = kvm_get_status, |