From 90fea5a800c3dd80fb8ad9a02929bcef5fde42b8 Mon Sep 17 00:00:00 2001 From: Jason Wang Date: Tue, 27 Sep 2022 15:48:08 +0800 Subject: vdpa: device feature provisioning This patch allows the device features to be provisioned through netlink. A new attribute is introduced to allow the userspace to pass a 64bit device features during device adding. This provides several advantages: - Allow to provision a subset of the features to ease the cross vendor live migration. - Better debug-ability for vDPA framework and parent. Reviewed-by: Eli Cohen Signed-off-by: Jason Wang Message-Id: <20220927074810.28627-2-jasowang@redhat.com> Signed-off-by: Michael S. Tsirkin --- drivers/vdpa/vdpa.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/vdpa') diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c index c06c02704461..278e26bfa492 100644 --- a/drivers/vdpa/vdpa.c +++ b/drivers/vdpa/vdpa.c @@ -600,6 +600,11 @@ static int vdpa_nl_cmd_dev_add_set_doit(struct sk_buff *skb, struct genl_info *i } config.mask |= BIT_ULL(VDPA_ATTR_DEV_NET_CFG_MAX_VQP); } + if (nl_attrs[VDPA_ATTR_DEV_FEATURES]) { + config.device_features = + nla_get_u64(nl_attrs[VDPA_ATTR_DEV_FEATURES]); + config.mask |= BIT_ULL(VDPA_ATTR_DEV_FEATURES); + } /* Skip checking capability if user didn't prefer to configure any * device networking attributes. It is likely that user might have used -- cgit v1.2.3