diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/idle_book3s.S | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S index 81defb6a9b74..e5cb3eedb564 100644 --- a/arch/powerpc/kernel/idle_book3s.S +++ b/arch/powerpc/kernel/idle_book3s.S @@ -422,25 +422,24 @@ 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. + * + * Offline (CPU unplug) case also must notify KVM that the CPU is + * idle. */ _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 */ + /* + * Tell KVM we're entering idle. + * This does not have to be done in real mode because the P9 MMU + * is independent per-thread. Some steppings share radix/hash mode + * between threads, but in that case KVM has a barrier sync in real + * mode before and after switching between radix and hash. + */ 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 */ + /* fall through */ - -/* - * Entered with MSR[EE]=0 and no soft-masked interrupts pending. - * r3 contains desired PSSCR register value. - */ _GLOBAL(power9_idle_stop) std r3, PACA_REQ_PSSCR(r13) #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE |