diff options
Diffstat (limited to 'arch/powerpc/kernel/idle_book3s.S')
| -rw-r--r-- | arch/powerpc/kernel/idle_book3s.S | 70 |
1 files changed, 33 insertions, 37 deletions
diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S index 1125c9be9e06..01e1c1997893 100644 --- a/arch/powerpc/kernel/idle_book3s.S +++ b/arch/powerpc/kernel/idle_book3s.S @@ -112,12 +112,14 @@ power9_save_additional_sprs: std r4, STOP_HFSCR(r13) mfspr r3, SPRN_MMCRA - mfspr r4, SPRN_MMCR1 + mfspr r4, SPRN_MMCR0 std r3, STOP_MMCRA(r13) - std r4, STOP_MMCR1(r13) + std r4, _MMCR0(r1) - mfspr r3, SPRN_MMCR2 - std r3, STOP_MMCR2(r13) + mfspr r3, SPRN_MMCR1 + mfspr r4, SPRN_MMCR2 + std r3, STOP_MMCR1(r13) + std r4, STOP_MMCR2(r13) blr power9_restore_additional_sprs: @@ -135,11 +137,14 @@ power9_restore_additional_sprs: ld r4, STOP_MMCRA(r13) mtspr SPRN_HFSCR, r3 mtspr SPRN_MMCRA, r4 - /* We have already restored PACA_MMCR0 */ - ld r3, STOP_MMCR1(r13) - ld r4, STOP_MMCR2(r13) - mtspr SPRN_MMCR1, r3 - mtspr SPRN_MMCR2, r4 + + ld r3, _MMCR0(r1) + ld r4, STOP_MMCR1(r13) + mtspr SPRN_MMCR0, r3 + mtspr SPRN_MMCR1, r4 + + ld r3, STOP_MMCR2(r13) + mtspr SPRN_MMCR2, r3 blr /* @@ -319,20 +324,13 @@ enter_winkle: /* * r3 - PSSCR value corresponding to the requested stop state. */ +power_enter_stop: #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE -power_enter_stop_kvm_rm: - /* - * This is currently unused because POWER9 KVM does not have to - * gather secondary threads into sibling mode, but the code is - * here in case that function is required. - * - * Tell KVM we're entering idle. - */ + /* 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 -power_enter_stop: /* * Check if we are executing the lite variant with ESL=EC=0 */ @@ -357,13 +355,15 @@ power_enter_stop: b pnv_wakeup_noloss .Lhandle_esl_ec_set: +BEGIN_FTR_SECTION /* - * POWER9 DD2 can incorrectly set PMAO when waking up after a - * state-loss idle. Saving and restoring MMCR0 over idle is a + * POWER9 DD2.0 or earlier can incorrectly set PMAO when waking up after + * a state-loss idle. Saving and restoring MMCR0 over idle is a * workaround. */ mfspr r4,SPRN_MMCR0 std r4,_MMCR0(r1) +END_FTR_SECTION_IFCLR(CPU_FTR_POWER9_DD2_1) /* * Check if the requested state is a deep idle state. @@ -496,18 +496,6 @@ pnv_powersave_wakeup_mce: b pnv_powersave_wakeup -#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE -kvm_start_guest_check: - li r0,KVM_HWTHREAD_IN_KERNEL - stb r0,HSTATE_HWTHREAD_STATE(r13) - /* Order setting hwthread_state vs. testing hwthread_req */ - sync - lbz r0,HSTATE_HWTHREAD_REQ(r13) - cmpwi r0,0 - beqlr - b kvm_start_guest -#endif - /* * Called from reset vector for powersave wakeups. * cr3 - set to gt if waking up with partial/complete hypervisor state loss @@ -532,9 +520,15 @@ ALT_FTR_SECTION_END_IFSET(CPU_FTR_ARCH_300) mr r3,r12 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE -BEGIN_FTR_SECTION - bl kvm_start_guest_check -END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_300) + li r0,KVM_HWTHREAD_IN_KERNEL + stb r0,HSTATE_HWTHREAD_STATE(r13) + /* Order setting hwthread_state vs. testing hwthread_req */ + sync + lbz r0,HSTATE_HWTHREAD_REQ(r13) + cmpwi r0,0 + beq 1f + b kvm_start_guest +1: #endif /* Return SRR1 from power7_nap() */ @@ -555,15 +549,17 @@ pnv_restore_hyp_resource_arch300: * then clear bit 60 in MMCRA to ensure the PMU starts running. */ blt cr3,1f +BEGIN_FTR_SECTION PPC_INVALIDATE_ERAT ld r1,PACAR1(r13) + ld r4,_MMCR0(r1) + mtspr SPRN_MMCR0,r4 +END_FTR_SECTION_IFCLR(CPU_FTR_POWER9_DD2_1) mfspr r4,SPRN_MMCRA ori r4,r4,(1 << (63-60)) mtspr SPRN_MMCRA,r4 xori r4,r4,(1 << (63-60)) mtspr SPRN_MMCRA,r4 - ld r4,_MMCR0(r1) - mtspr SPRN_MMCR0,r4 1: /* * POWER ISA 3. Use PSSCR to determine if we |