* Xin Li (Intel) <xin@xxxxxxxxx> wrote:
> Convert a native_wrmsr() use to native_wrmsrq() to zap meaningless type
> conversions when a u64 MSR value is splitted into two u32.
>
> Signed-off-by: Xin Li (Intel) <xin@xxxxxxxxx>
> ---
> arch/x86/coco/sev/core.c | 7 +------
> 1 file changed, 1 insertion(+), 6 deletions(-)
>
> diff --git a/arch/x86/coco/sev/core.c b/arch/x86/coco/sev/core.c
> index ff82151f7718..b3ce6fc8b62d 100644
> --- a/arch/x86/coco/sev/core.c
> +++ b/arch/x86/coco/sev/core.c
> @@ -282,12 +282,7 @@ static inline u64 sev_es_rd_ghcb_msr(void)
>
> static __always_inline void sev_es_wr_ghcb_msr(u64 val)
> {
> - u32 low, high;
> -
> - low = (u32)(val);
> - high = (u32)(val >> 32);
> -
> - native_wrmsr(MSR_AMD64_SEV_ES_GHCB, low, high);
> + native_wrmsrq(MSR_AMD64_SEV_ES_GHCB, val);
BTW., at this point we should probably just replace
sev_es_wr_ghcb_msr() calls with direct calls to:
native_wrmsrq(MSR_AMD64_SEV_ES_GHCB, ...);
as sev_es_wr_ghcb_msr() is now basically an open-coded native_wrmsrq().
Thanks,
Ingo
