> From: Olaf Hering <olaf@xxxxxxxxx>
> Sent: Monday, September 18, 2023 9:02 AM
> [...]
> Use the hole prior shared_gpa_boundary to store the result of get_vtl.
> This reduces the size by 8 bytes.
> [...]
> --- a/include/asm-generic/mshyperv.h
> +++ b/include/asm-generic/mshyperv.h
> @@ -53,8 +53,8 @@ struct ms_hyperv_info {
> u32 reserved_b2 : 20;
> };
> };
> - u64 shared_gpa_boundary;
> u8 vtl;
> + u64 shared_gpa_boundary;
> };
> extern struct ms_hyperv_info ms_hyperv;
> extern bool hv_nested;
How about moving the 'vtl' field to an even earlier place:
--- a/include/asm-generic/mshyperv.h
+++ b/include/asm-generic/mshyperv.h
@@ -36,6 +36,9 @@ struct ms_hyperv_info {
u32 nested_features;
u32 max_vp_index;
u32 max_lp_index;
+
+ u8 vtl;
+
union {
u32 isolation_config_a;
struct {
@@ -54,7 +57,6 @@ struct ms_hyperv_info {
};
};
u64 shared_gpa_boundary;
- u8 vtl;
};
extern struct ms_hyperv_info ms_hyperv;
extern bool hv_nested;
This also reduces the size by 8 bytes, and keeps
the isolation_config_a/ isolation_config_b/ shared_gpa_boundary
together, which are related.
