From: Zhu Lingshan <lingshan.zhu@intel.com>
To: jasowang@redhat.com, mst@redhat.com, lulu@redhat.com, leonro@nvidia.com
Cc: virtualization@lists.linux-foundation.org,
netdev@vger.kernel.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org,
Zhu Lingshan <lingshan.zhu@intel.com>
Subject: [PATCH V4 6/7] vDPA/ifcvf: verify mandatory feature bits for vDPA
Date: Mon, 15 Mar 2021 15:45:00 +0800 [thread overview]
Message-ID: <20210315074501.15868-7-lingshan.zhu@intel.com> (raw)
In-Reply-To: <20210315074501.15868-1-lingshan.zhu@intel.com>
vDPA requres VIRTIO_F_ACCESS_PLATFORM as a must, this commit
examines this when set features.
Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
---
drivers/vdpa/ifcvf/ifcvf_base.c | 12 ++++++++++++
drivers/vdpa/ifcvf/ifcvf_base.h | 1 +
drivers/vdpa/ifcvf/ifcvf_main.c | 5 +++++
3 files changed, 18 insertions(+)
diff --git a/drivers/vdpa/ifcvf/ifcvf_base.c b/drivers/vdpa/ifcvf/ifcvf_base.c
index ea6a78791c9b..4f257c4b2f76 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.c
+++ b/drivers/vdpa/ifcvf/ifcvf_base.c
@@ -224,6 +224,18 @@ u64 ifcvf_get_features(struct ifcvf_hw *hw)
return hw->hw_features;
}
+int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features)
+{
+ struct ifcvf_adapter *ifcvf = vf_to_adapter(hw);
+
+ if (!(features & BIT_ULL(VIRTIO_F_ACCESS_PLATFORM)) && features) {
+ IFCVF_ERR(ifcvf->pdev, "VIRTIO_F_ACCESS_PLATFORM not negotiated\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
void ifcvf_read_net_config(struct ifcvf_hw *hw, u64 offset,
void *dst, int length)
{
diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
index dbb8c10aa3b1..f77239fc1644 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.h
+++ b/drivers/vdpa/ifcvf/ifcvf_base.h
@@ -123,6 +123,7 @@ void io_write64_twopart(u64 val, u32 *lo, u32 *hi);
void ifcvf_reset(struct ifcvf_hw *hw);
u64 ifcvf_get_features(struct ifcvf_hw *hw);
u64 ifcvf_get_hw_features(struct ifcvf_hw *hw);
+int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features);
u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid);
int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num);
struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw);
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index 25fb9dfe23f0..ea93ea7fd5df 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -179,6 +179,11 @@ static u64 ifcvf_vdpa_get_features(struct vdpa_device *vdpa_dev)
static int ifcvf_vdpa_set_features(struct vdpa_device *vdpa_dev, u64 features)
{
struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+ int ret;
+
+ ret = ifcvf_verify_min_features(vf, features);
+ if (ret)
+ return ret;
vf->req_features = features;
--
2.27.0
next prev parent reply other threads:[~2021-03-15 7:51 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-15 7:44 [PATCH V4 0/7] vDPA/ifcvf: enables Intel C5000X-PL virtio-net Zhu Lingshan
2021-03-15 7:44 ` [PATCH V4 1/7] vDPA/ifcvf: get_vendor_id returns a device specific vendor id Zhu Lingshan
2021-03-16 6:09 ` Jason Wang
2021-03-15 7:44 ` [PATCH V4 2/7] vDPA/ifcvf: enable Intel C5000X-PL virtio-net for vDPA Zhu Lingshan
2021-03-16 6:09 ` Jason Wang
2021-03-15 7:44 ` [PATCH V4 3/7] vDPA/ifcvf: rename original IFCVF dev ids to N3000 ids Zhu Lingshan
2021-03-16 6:10 ` Jason Wang
2021-03-15 7:44 ` [PATCH V4 4/7] vDPA/ifcvf: remove the version number string Zhu Lingshan
2021-03-16 6:11 ` Jason Wang
2021-03-15 7:44 ` [PATCH V4 5/7] vDPA/ifcvf: fetch device feature bits when probe Zhu Lingshan
2021-03-17 3:57 ` Jason Wang
2021-03-15 7:45 ` Zhu Lingshan [this message]
2021-03-17 3:58 ` [PATCH V4 6/7] vDPA/ifcvf: verify mandatory feature bits for vDPA Jason Wang
2021-03-15 7:45 ` [PATCH V4 7/7] vDPA/ifcvf: deduce VIRTIO device ID from pdev ids Zhu Lingshan
2021-03-17 4:07 ` Jason Wang
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