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Update README with virtio config and bridge setup instructions #90

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CharleneChar wants to merge 2 commits into from
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Update README with virtio config and bridge setup instructions #90

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b7b4bcb
Update README with virtio config and bridge setup instructions
CharleneChar Mar 28, 2026
42769bb
Fix build for kernel 6.17 tx power API change
CharleneChar Apr 1, 2026
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10 changes: 9 additions & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -652,7 +652,10 @@ Enter the top directory of the Linux kernel source and use the following command
```shell
$ make menuconfig
```
The default kernel configuration will work for our testing environment, so just click `save` and we get `.config` on the top directory.
To allow virtio device to be bound to vwifi driver, please ensure the virtio network driver is disabled before you click `save`. By excluding the virtio network driver, you should spot `CONFIG_VIRTIO_NET=n` in the `.config` file on the top directory.
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@jserv jserv Mar 30, 2026

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Explain the rationale.

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@CharleneChar CharleneChar Apr 2, 2026

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Thanks for pointing this out. I’ve created PR #92 to address this issue, and I’ll follow up and resolve it in that PR.

```
Device Drivers ---> Network device support ---> Virtio network driver ---> no
```

Before building the kernel, please ensure that all the needed packages or libraries have been installed in your machine.

Expand Down Expand Up @@ -750,6 +753,11 @@ $ sudo ip link set tap1 master br0
$ sudo ip link set tap2 master br0
```

Start `bridge` device:
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@jserv jserv Mar 30, 2026

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Avoid necessary backticks.

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@CharleneChar CharleneChar Apr 2, 2026

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Thanks for pointing this out. I’ve created PR #92 to address this issue, and I’ll follow up and resolve it in that PR.

```shell
$ sudo ip link set br0 up
```

### Start VM with Qemu
Once we have our kernel image and rootfs, we can start running `Qemu`:

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6 changes: 6 additions & 0 deletions vwifi.c
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Expand Up @@ -2019,6 +2019,9 @@ static int vwifi_delete_interface(struct vwifi_vif *vif)
/* Set transmit power for the virtual interface */
static int vwifi_set_tx_power(struct wiphy *wiphy,
struct wireless_dev *wdev,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 17, 0)
int radio_idx,
#endif
enum nl80211_tx_power_setting type,
int mbm)
{
Expand Down Expand Up @@ -2064,6 +2067,9 @@ static int vwifi_set_tx_power(struct wiphy *wiphy,
/* Get transmit power from the virtual interface */
static int vwifi_get_tx_power(struct wiphy *wiphy,
struct wireless_dev *wdev,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 17, 0)
int radio_idx,
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 14, 0)
unsigned int link_id,
#endif
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