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kvm: Implement "host features" for virtio blk device

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Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Pekka Enberg
2015-06-01 16:39:40 +01:00
committed by Will Deacon
parent fc0a744716
commit c435b91de1
1 changed files with 10 additions and 2 deletions
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blk-virtio.c
+10 -2
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@@ -1,5 +1,6 @@
#include "kvm/blk-virtio.h"
#include "kvm/virtio_blk.h"
#include "kvm/virtio_pci.h"
#include "kvm/ioport.h"
#include "kvm/kvm.h"
@@ -8,12 +9,19 @@
#define VIRTIO_BLK_IRQ 14
struct device {
uint32_t host_features;
uint32_t guest_features;
uint8_t status;
};
static struct device device;
static struct device device = {
.host_features = (1UL << VIRTIO_BLK_F_SEG_MAX)
| (1UL << VIRTIO_BLK_F_GEOMETRY)
| (1UL << VIRTIO_BLK_F_TOPOLOGY)
| (1UL << VIRTIO_BLK_F_BLK_SIZE),
};
#include <stdio.h>
static bool blk_virtio_in(struct kvm *self, uint16_t port, void *data, int size, uint32_t count)
{
unsigned long offset;
@@ -26,7 +34,7 @@ static bool blk_virtio_in(struct kvm *self, uint16_t port, void *data, int size,
switch (offset) {
case VIRTIO_PCI_HOST_FEATURES:
ioport__write32(data, 0x00);
ioport__write32(data, device.host_features);
break;
case VIRTIO_PCI_GUEST_FEATURES:
return false;