Re: [kvm-unit-tests PATCH 4/5] lib: s390x: uv: Add offset comments to uv_query and extend it

[Cornelia Huck <cohuck@redhat.com>]

On Tue, Jun 29 2021, Janosch Frank <frankja@linux.ibm.com> wrote:

> The struct is getting longer, let's add offset comments so we know
> where we change things when we add struct members.
>
> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
> ---
>  lib/s390x/asm/uv.h | 33 +++++++++++++++++----------------
>  1 file changed, 17 insertions(+), 16 deletions(-)
>
> diff --git a/lib/s390x/asm/uv.h b/lib/s390x/asm/uv.h
> index 96a2a7e..5ff98b8 100644
> --- a/lib/s390x/asm/uv.h
> +++ b/lib/s390x/asm/uv.h
> @@ -86,22 +86,23 @@ struct uv_cb_init {
>  } __attribute__((packed))  __attribute__((aligned(8)));
>  
>  struct uv_cb_qui {
> -	struct uv_cb_header header;
> -	uint64_t reserved08;
> -	uint64_t inst_calls_list[4];
> -	uint64_t reserved30[2];
> -	uint64_t uv_base_stor_len;
> -	uint64_t reserved48;
> -	uint64_t conf_base_phys_stor_len;
> -	uint64_t conf_base_virt_stor_len;
> -	uint64_t conf_virt_var_stor_len;
> -	uint64_t cpu_stor_len;
> -	uint32_t reserved70[3];
> -	uint32_t max_num_sec_conf;
> -	uint64_t max_guest_stor_addr;
> -	uint8_t  reserved88[158 - 136];
> -	uint16_t max_guest_cpus;
> -	uint8_t  reserveda0[200 - 160];
> +	struct uv_cb_header header;		/* 0x0000 */
> +	uint64_t reserved08;			/* 0x0008 */
> +	uint64_t inst_calls_list[4];		/* 0x0010 */
> +	uint64_t reserved30[2];			/* 0x0030 */
> +	uint64_t uv_base_stor_len;		/* 0x0040 */
> +	uint64_t reserved48;			/* 0x0048 */
> +	uint64_t conf_base_phys_stor_len;	/* 0x0050 */
> +	uint64_t conf_base_virt_stor_len;	/* 0x0058 */
> +	uint64_t conf_virt_var_stor_len;	/* 0x0060 */
> +	uint64_t cpu_stor_len;			/* 0x0068 */
> +	uint32_t reserved70[3];			/* 0x0070 */
> +	uint32_t max_num_sec_conf;		/* 0x007c */
> +	uint64_t max_guest_stor_addr;		/* 0x0080 */
> +	uint8_t  reserved88[158 - 136];		/* 0x0088 */
> +	uint16_t max_guest_cpus;		/* 0x009e */
> +	uint64_t uv_feature_indications;	/* 0x00a0 */
> +	uint8_t  reserveda0[200 - 168];		/* 0x00a8 */

Should this rather be reserveda8? The other reserveds encode their
position properly.