Re: [PATCH v5 08/13] migration/multifd: Add new migration option for multifd DSA offloading.

[Yichen Wang <yichen.wang@bytedance.com>]

On Thu, Jul 11, 2024 at 2:53 PM Yichen Wang <yichen.wang@bytedance.com> wrote:

> diff --git a/migration/options.c b/migration/options.c
> index 645f55003d..f839493016 100644
> --- a/migration/options.c
> +++ b/migration/options.c
> @@ -29,6 +29,7 @@
>  #include "ram.h"
>  #include "options.h"
>  #include "sysemu/kvm.h"
> +#include <cpuid.h>
>
>  /* Maximum migrate downtime set to 2000 seconds */
>  #define MAX_MIGRATE_DOWNTIME_SECONDS 2000
> @@ -162,6 +163,10 @@ Property migration_properties[] = {
>      DEFINE_PROP_ZERO_PAGE_DETECTION("zero-page-detection", MigrationState,
>                         parameters.zero_page_detection,
>                         ZERO_PAGE_DETECTION_MULTIFD),
> +    /* DEFINE_PROP_ARRAY("dsa-accel-path", MigrationState, x, */
> +    /*                    parameters.dsa_accel_path, qdev_prop_string, char *), */
> +    /* DEFINE_PROP_STRING("dsa-accel-path", MigrationState, */
> +    /*                    parameters.dsa_accel_path), */
>
>      /* Migration capabilities */
>      DEFINE_PROP_MIG_CAP("x-xbzrle", MIGRATION_CAPABILITY_XBZRLE),

I changed the dsa-accel-path to be a ['str'], i.e. strList* in C.
However, I am having a hard time about how to define the proper
properties here. I don't know what MARCO to use and I can't find good
examples... Need some guidance about how to proceed. Basically I will
need this to pass something like '-global
migration.dsa-accel-path="/dev/dsa/wq0.0"' in cmdline, or
"migrate_set_parameter dsa-accel-path" in QEMU CLI. Don't know how to
pass strList there.

Thanks very much!