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| author | Michael Ellerman <mpe@ellerman.id.au> | 2017-08-29 21:26:30 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-08-29 21:26:30 +1000 |
| commit | 82b7fcc0055dcc1aa9a7b51c7fbc31ad8d89fffa (patch) | |
| tree | 6cd2ec76b67a1c252538b1dd42e948b45fb058bc /arch/powerpc/kernel/idle_book3s.S | |
| parent | 12c15a7e706772293694e63482a99a8f7259e164 (diff) | |
| parent | 94a04bc25a2c6296bd0c5e82c10e8231c2b11f77 (diff) | |
| download | linux-82b7fcc0055dcc1aa9a7b51c7fbc31ad8d89fffa.tar.gz | |
Merge branch 'topic/ppc-kvm' into next
Merge Nicks commit to rework the KVM thread management, shared with the
KVM tree via the ppc-kvm topic branch.
Diffstat (limited to 'arch/powerpc/kernel/idle_book3s.S')
| -rw-r--r-- | arch/powerpc/kernel/idle_book3s.S | 35 |
1 files changed, 24 insertions, 11 deletions
diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S index bfbf0976fc09..4924647d964d 100644 --- a/arch/powerpc/kernel/idle_book3s.S +++ b/arch/powerpc/kernel/idle_book3s.S @@ -296,13 +296,20 @@ 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 */ +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. + */ 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 */ @@ -465,6 +472,18 @@ 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 @@ -489,15 +508,9 @@ ALT_FTR_SECTION_END_IFSET(CPU_FTR_ARCH_300) mr r3,r12 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE - 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: +BEGIN_FTR_SECTION + bl kvm_start_guest_check +END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_300) #endif /* Return SRR1 from power7_nap() */ |