Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1532124

Re: [PATCH v3 1/3] powernv:idle: Add IDLE_STATE_ENTER_SEQ_NORET macro

Show all headers | View raw

On 10/11/16 18:54, Gautham R. Shenoy wrote:
> From: "Gautham R. Shenoy" <ego@linux.vnet.ibm.com>
> 
> Currently all the low-power idle states are expected to wake up
> at reset vector 0x100. Which is why the macro IDLE_STATE_ENTER_SEQ
> that puts the CPU to an idle state and never returns.
> 
> On ISA_300, when the ESL and EC bits in the PSSCR are zero, the
> CPU is expected to wake up at the next instruction of the idle
> instruction.
> 
> This patch adds a new macro named IDLE_STATE_ENTER_SEQ_NORET for the

I think something like IDLE_STATE_ENTER_SEQ_LOSE_CTX would be better?

> no-return variant and reuses the name IDLE_STATE_ENTER_SEQ
> for a variant that allows resuming operation at the instruction next
> to the idle-instruction.
> 
<snip>
> +
> +#define	IDLE_STATE_ENTER_SEQ_NORET(IDLE_INST)			\
> +	IDLE_STATE_ENTER_SEQ(IDLE_INST)                         \

So we start off with both as the same?

>  	b	.
>  #endif /* CONFIG_PPC_P7_NAP */
<snip>
Balbir

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

Re: [PATCH v3 1/3] powernv:idle: Add IDLE_STATE_ENTER_SEQ_NORET macro Balbir Singh <bsingharora@gmail.com> - 2016-11-29 11:50 +0100
  Re: [PATCH v3 1/3] powernv:idle: Add IDLE_STATE_ENTER_SEQ_NORET macro Gautham R Shenoy <ego@linux.vnet.ibm.com> - 2016-12-05 10:30 +0100

csiph-web