From 3d4fbffdd703d2b968db443911f2147c732a4a48 Mon Sep 17 00:00:00 2001 From: Nicholas Piggin Date: Sat, 18 Nov 2017 00:08:05 +1000 Subject: 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 Reviewed-by: Vaidyanathan Srinivasan Signed-off-by: Michael Ellerman --- arch/powerpc/kernel/idle_book3s.S | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) (limited to 'arch/powerpc/kernel/idle_book3s.S') 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 */ @@ -425,6 +419,24 @@ ALT_FTR_SECTION_END_NESTED_IFSET(CPU_FTR_ARCH_207S, 66); \ ld r3,ORIG_GPR3(r1); /* Restore original r3 */ \ 20: nop; +/* + * 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. -- cgit