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| author | Nicholas Piggin <npiggin@gmail.com> | 2017-11-17 17:08:05 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-03-31 16:47:46 +0300 |
| commit | 3d4fbffdd703d2b968db443911f2147c732a4a48 (patch) | |
| tree | 4227b85de9f76cbba0c7c9979ea08be7548c4d56 | |
| parent | d40b6768e45bd9213139b2d91d30c7692b6007b1 (diff) | |
| download | linux-3d4fbffdd703d2b968db443911f2147c732a4a48.tar.xz | |
powerpc/64s/idle: POWER9 implement a separate idle stop function for hotplug
Implement a new function to invoke stop, power9_offline_stop, which is
like power9_idle_stop but used by the cpu hotplug code.
Move KVM secondary state manipulation code to the offline case.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/include/asm/processor.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/idle_book3s.S | 24 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/idle.c | 2 |
3 files changed, 20 insertions, 7 deletions
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h index bb9cb25ffb20..c4b36a494a63 100644 --- a/arch/powerpc/include/asm/processor.h +++ b/arch/powerpc/include/asm/processor.h @@ -518,6 +518,7 @@ extern int powersave_nap; /* set if nap mode can be used in idle loop */ extern unsigned long power7_idle_insn(unsigned long type); /* PNV_THREAD_NAP/etc*/ extern void power7_idle_type(unsigned long type); extern unsigned long power9_idle_stop(unsigned long psscr_val); +extern unsigned long power9_offline_stop(unsigned long psscr_val); extern void power9_idle_type(unsigned long stop_psscr_val, unsigned long stop_psscr_mask); diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S index 89157cf452e3..2896ccf3138d 100644 --- a/arch/powerpc/kernel/idle_book3s.S +++ b/arch/powerpc/kernel/idle_book3s.S @@ -325,12 +325,6 @@ enter_winkle: * r3 - PSSCR value corresponding to the requested stop state. */ power_enter_stop: -#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE - /* Tell KVM we're entering idle */ - li r4,KVM_HWTHREAD_IN_IDLE - /* DO THIS IN REAL MODE! See comment above. */ - stb r4,HSTATE_HWTHREAD_STATE(r13) -#endif /* * Check if we are executing the lite variant with ESL=EC=0 */ @@ -429,6 +423,24 @@ ALT_FTR_SECTION_END_NESTED_IFSET(CPU_FTR_ARCH_207S, 66); \ * Entered with MSR[EE]=0 and no soft-masked interrupts pending. * r3 contains desired PSSCR register value. */ +_GLOBAL(power9_offline_stop) + std r3, PACA_REQ_PSSCR(r13) + mtspr SPRN_PSSCR,r3 +#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE + /* Tell KVM we're entering idle */ + li r4,KVM_HWTHREAD_IN_IDLE + /* DO THIS IN REAL MODE! See comment above. */ + stb r4,HSTATE_HWTHREAD_STATE(r13) +#endif + LOAD_REG_ADDR(r4,power_enter_stop) + b pnv_powersave_common + /* No return */ + + +/* + * Entered with MSR[EE]=0 and no soft-masked interrupts pending. + * r3 contains desired PSSCR register value. + */ _GLOBAL(power9_idle_stop) BEGIN_FTR_SECTION lwz r5, PACA_DONT_STOP(r13) diff --git a/arch/powerpc/platforms/powernv/idle.c b/arch/powerpc/platforms/powernv/idle.c index d9e366bb23da..378fde1f85a8 100644 --- a/arch/powerpc/platforms/powernv/idle.c +++ b/arch/powerpc/platforms/powernv/idle.c @@ -511,7 +511,7 @@ unsigned long pnv_cpu_offline(unsigned int cpu) psscr = mfspr(SPRN_PSSCR); psscr = (psscr & ~pnv_deepest_stop_psscr_mask) | pnv_deepest_stop_psscr_val; - srr1 = power9_idle_stop(psscr); + srr1 = power9_offline_stop(psscr); } else if ((idle_states & OPAL_PM_WINKLE_ENABLED) && (idle_states & OPAL_PM_LOSE_FULL_CONTEXT)) { |