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Groups > linux.kernel > #1438937
| From | "Shreyas B. Prabhu" <shreyas@linux.vnet.ibm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v7 06/11] powerpc/powernv: abstraction for saving SPRs before entering deep idle states |
| Date | 2016-07-07 22:50 +0200 |
| Message-ID | <rSopc-3tL-37@gated-at.bofh.it> (permalink) |
| References | <rSopb-3tL-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Create a function for saving SPRs before entering deep idle states. This function can be reused for POWER9 deep idle states. Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com> Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com> --- - No changes since v3 Changes in v3: ============= - Newly added in v3 arch/powerpc/kernel/idle_book3s.S | 54 +++++++++++++++++++++++---------------- 1 file changed, 32 insertions(+), 22 deletions(-) diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S index a8397e3..2f909a1 100644 --- a/arch/powerpc/kernel/idle_book3s.S +++ b/arch/powerpc/kernel/idle_book3s.S @@ -53,6 +53,36 @@ .text /* + * Used by threads before entering deep idle states. Saves SPRs + * in interrupt stack frame + */ +save_sprs_to_stack: + /* + * Note all register i.e per-core, per-subcore or per-thread is saved + * here since any thread in the core might wake up first + */ + mfspr r3,SPRN_SDR1 + std r3,_SDR1(r1) + mfspr r3,SPRN_RPR + std r3,_RPR(r1) + mfspr r3,SPRN_SPURR + std r3,_SPURR(r1) + mfspr r3,SPRN_PURR + std r3,_PURR(r1) + mfspr r3,SPRN_TSCR + std r3,_TSCR(r1) + mfspr r3,SPRN_DSCR + std r3,_DSCR(r1) + mfspr r3,SPRN_AMOR + std r3,_AMOR(r1) + mfspr r3,SPRN_WORT + std r3,_WORT(r1) + mfspr r3,SPRN_WORC + std r3,_WORC(r1) + + blr + +/* * Used by threads when the lock bit of core_idle_state is set. * Threads will spin in HMT_LOW until the lock bit is cleared. * r14 - pointer to core_idle_state @@ -209,28 +239,8 @@ fastsleep_workaround_at_entry: b common_enter enter_winkle: - /* - * Note all register i.e per-core, per-subcore or per-thread is saved - * here since any thread in the core might wake up first - */ - mfspr r3,SPRN_SDR1 - std r3,_SDR1(r1) - mfspr r3,SPRN_RPR - std r3,_RPR(r1) - mfspr r3,SPRN_SPURR - std r3,_SPURR(r1) - mfspr r3,SPRN_PURR - std r3,_PURR(r1) - mfspr r3,SPRN_TSCR - std r3,_TSCR(r1) - mfspr r3,SPRN_DSCR - std r3,_DSCR(r1) - mfspr r3,SPRN_AMOR - std r3,_AMOR(r1) - mfspr r3,SPRN_WORT - std r3,_WORT(r1) - mfspr r3,SPRN_WORC - std r3,_WORC(r1) + bl save_sprs_to_stack + IDLE_STATE_ENTER_SEQ(PPC_WINKLE) _GLOBAL(power7_idle) -- 2.4.11
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[PATCH v7 00/11] powerpc/powernv/cpuidle: Add support for POWER ISA v3 idle states "Shreyas B. Prabhu" <shreyas@linux.vnet.ibm.com> - 2016-07-07 22:50 +0200
[PATCH v7 01/11] powerpc/powernv: Use PNV_THREAD_WINKLE macro while requesting for winkle "Shreyas B. Prabhu" <shreyas@linux.vnet.ibm.com> - 2016-07-07 22:50 +0200
[PATCH v7 08/11] cpuidle/powernv: Use CPUIDLE_STATE_MAX instead of MAX_POWERNV_IDLE_STATES "Shreyas B. Prabhu" <shreyas@linux.vnet.ibm.com> - 2016-07-07 22:50 +0200
[PATCH v7 07/11] powerpc/powernv: Add platform support for stop instruction "Shreyas B. Prabhu" <shreyas@linux.vnet.ibm.com> - 2016-07-07 22:50 +0200
Re: [PATCH v7 07/11] powerpc/powernv: Add platform support for stop instruction Michael Neuling <mikey@neuling.org> - 2016-07-08 04:30 +0200
Re: [PATCH v7 07/11] powerpc/powernv: Add platform support for stop instruction Shreyas B Prabhu <shreyas@linux.vnet.ibm.com> - 2016-07-08 06:30 +0200
Re: [PATCH v7 07/11] powerpc/powernv: Add platform support for stop instruction Michael Neuling <mikey@neuling.org> - 2016-07-08 06:30 +0200
[PATCH v7 10/11] cpuidle/powernv: Add support for POWER ISA v3 idle states "Shreyas B. Prabhu" <shreyas@linux.vnet.ibm.com> - 2016-07-07 22:50 +0200
[PATCH v7 02/11] powerpc/kvm: make hypervisor state restore a function "Shreyas B. Prabhu" <shreyas@linux.vnet.ibm.com> - 2016-07-07 22:50 +0200
[PATCH v7 09/11] cpuidle/powernv: cleanup powernv_add_idle_states "Shreyas B. Prabhu" <shreyas@linux.vnet.ibm.com> - 2016-07-07 22:50 +0200
Re: [PATCH v7 09/11] cpuidle/powernv: cleanup powernv_add_idle_states Michael Neuling <mikey@neuling.org> - 2016-07-08 04:50 +0200
[PATCH v7 03/11] powerpc/powernv: Rename idle_power7.S to idle_book3s.S "Shreyas B. Prabhu" <shreyas@linux.vnet.ibm.com> - 2016-07-07 22:50 +0200
[PATCH v7 04/11] powerpc/powernv: Rename reusable idle functions to hardware agnostic names "Shreyas B. Prabhu" <shreyas@linux.vnet.ibm.com> - 2016-07-07 22:50 +0200
[PATCH v7 06/11] powerpc/powernv: abstraction for saving SPRs before entering deep idle states "Shreyas B. Prabhu" <shreyas@linux.vnet.ibm.com> - 2016-07-07 22:50 +0200
[PATCH v7 05/11] powerpc/powernv: Make pnv_powersave_common more generic "Shreyas B. Prabhu" <shreyas@linux.vnet.ibm.com> - 2016-07-07 23:00 +0200
Re: [PATCH v7 00/11] powerpc/powernv/cpuidle: Add support for POWER ISA v3 idle states Michael Neuling <mikey@neuling.org> - 2016-07-08 04:50 +0200
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