On 03/16/21 23:59, Ankur Arora wrote:
> Use CpuPause() to allow the CPU to go into a lower power state
> state while we spin wait.
>
> Cc: Liming Gao <gaolim...@byosoft.com.cn>
> Signed-off-by: Ankur Arora <ankur.a.ar...@oracle.com>
> Reviewed-by: Michael D Kinney <michael.d.kin...@intel.com>
> ---
> MdePkg/Library/BaseLib/CpuDeadLoop.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/MdePkg/Library/BaseLib/CpuDeadLoop.c
> b/MdePkg/Library/BaseLib/CpuDeadLoop.c
> index 9e110cacbc96..3cd304351a65 100644
> --- a/MdePkg/Library/BaseLib/CpuDeadLoop.c
> +++ b/MdePkg/Library/BaseLib/CpuDeadLoop.c
> @@ -28,5 +28,7 @@ CpuDeadLoop (
> {
> volatile UINTN Index;
>
> - for (Index = 0; Index == 0;);
> + for (Index = 0; Index == 0;) {
> + CpuPause();
> + }
> }
>
Reviewed-by: Laszlo Ersek <ler...@redhat.com>
(for RISC-V and ARM64, the implementations seem to be "nop" instructions)
Thanks
Laszlo
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