From: Adrian Moreno <amorenoz@redhat.com>
To: dev@dpdk.org
Cc: zhihong.wang@intel.com, chenbo.xia@intel.com,
maxime.coquelin@redhat.com, Adrian Moreno <amorenoz@redhat.com>
Subject: [dpdk-dev] [PATCH v2 4/4] net/virtio: enable feature checking on virtio-user
Date: Tue, 4 Aug 2020 09:24:31 +0200 [thread overview]
Message-ID: <20200804072431.86441-5-amorenoz@redhat.com> (raw)
In-Reply-To: <20200804072431.86441-1-amorenoz@redhat.com>
virtio 1.0 introduced a mechanism for the driver to verify that the
feature bits it sets are accepted by the device. This mechanism consists
in setting the VIRTIO_STATUS_FEATURE_OK status bit and re-reading it,
whitch gives a chance for the device to clear it if the the features
were not accepted.
This is currently being done only in modern virtio-pci devices but since
the appropriate vhost-user messages have been added, it can also be done
in virtio-user (vhost-user only).
This patch activates this mechanism on virtio-user.
Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
---
drivers/net/virtio/virtio_ethdev.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index dc0093bdf..9063bfeb2 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -1355,12 +1355,13 @@ virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
hw->guest_features);
- if (hw->modern) {
- if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
- PMD_INIT_LOG(ERR,
- "VIRTIO_F_VERSION_1 features is not enabled.");
- return -1;
- }
+ if (hw->modern && !vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
+ PMD_INIT_LOG(ERR,
+ "VIRTIO_F_VERSION_1 features is not enabled.");
+ return -1;
+ }
+
+ if (hw->modern || hw->virtio_user_dev) {
vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
PMD_INIT_LOG(ERR,
--
2.26.2
next prev parent reply other threads:[~2020-08-04 7:25 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-04 7:24 [dpdk-dev] [PATCH v2 0/4] Add support for GET/SET_STATUS on virtio-user pmd Adrian Moreno
2020-08-04 7:24 ` [dpdk-dev] [PATCH v2 1/4] net/virtio: add DEVICE_NEEDS_RESET status bit Adrian Moreno
2020-08-05 10:52 ` Xia, Chenbo
2020-08-05 14:07 ` Adrian Moreno
2020-08-04 7:24 ` [dpdk-dev] [PATCH v2 2/4] net/virtio: add VIRTIO_SET_STATUS support to Virtio-user Adrian Moreno
2020-08-05 10:53 ` Xia, Chenbo
2020-08-04 7:24 ` [dpdk-dev] [PATCH v2 3/4] net/virtio: add GET_STATUS support to virtio-user Adrian Moreno
2020-08-05 10:55 ` Xia, Chenbo
2020-08-05 14:06 ` Adrian Moreno
2020-08-04 7:24 ` Adrian Moreno [this message]
2020-08-05 10:57 ` [dpdk-dev] [PATCH v2 4/4] net/virtio: enable feature checking on virtio-user Xia, Chenbo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200804072431.86441-5-amorenoz@redhat.com \
--to=amorenoz@redhat.com \
--cc=chenbo.xia@intel.com \
--cc=dev@dpdk.org \
--cc=maxime.coquelin@redhat.com \
--cc=zhihong.wang@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).