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net/ifc: add LM mode parameter

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This patch series enables a new method for live migration, i.e. software
assisted live migration. This patch provides a device argument for user
to choose the methold.

When "sw-live-migration=1", driver/device will do live migration with a
relay thread dealing with dirty page logging. Without this parameter,
device will do dirty page logging and there's no relay thread consuming
CPU resource.

Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
This commit is contained in:
Xiao Wang 2018-12-18 16:02:04 +08:00 committed by Ferruh Yigit
parent 40ef35f4a5
commit 4c3f55cc23
1 changed files with 13 additions and 0 deletions
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13
drivers/net/ifc/ifcvf_vdpa.c
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@ -8,6 +8,7 @@
#include <sys/ioctl.h>
#include <sys/epoll.h>
#include <linux/virtio_net.h>
#include <stdbool.h>
#include <rte_malloc.h>
#include <rte_memory.h>
@ -31,9 +32,11 @@
#endif
#define IFCVF_VDPA_MODE "vdpa"
#define IFCVF_SW_FALLBACK_LM "sw-live-migration"
static const char * const ifcvf_valid_arguments[] = {
IFCVF_VDPA_MODE,
IFCVF_SW_FALLBACK_LM,
NULL
};
@ -56,6 +59,7 @@ struct ifcvf_internal {
rte_atomic32_t dev_attached;
rte_atomic32_t running;
rte_spinlock_t lock;
bool sw_lm;
};
struct internal_list {
@ -767,6 +771,7 @@ ifcvf_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
struct ifcvf_internal *internal = NULL;
struct internal_list *list = NULL;
int vdpa_mode = 0;
int sw_fallback_lm = 0;
struct rte_kvargs *kvlist = NULL;
int ret = 0;
@ -826,6 +831,14 @@ ifcvf_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
internal->dev_addr.type = PCI_ADDR;
list->internal = internal;
if (rte_kvargs_count(kvlist, IFCVF_SW_FALLBACK_LM)) {
ret = rte_kvargs_process(kvlist, IFCVF_SW_FALLBACK_LM,
&open_int, &sw_fallback_lm);
if (ret < 0)
goto error;
}
internal->sw_lm = sw_fallback_lm;
internal->did = rte_vdpa_register_device(&internal->dev_addr,
&ifcvf_ops);
if (internal->did < 0) {