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| author | Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com> | 2016-07-08 11:50:47 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-07-15 20:18:40 +1000 |
| commit | 4eae2c9ae54a5ef3ca32370e3b28a6f83c61401f (patch) | |
| tree | 835869c4d61b7ae22f5e647be854cef44b026d95 /arch/powerpc/kernel | |
| parent | 5fa6b6bd7adf347f2989560e7a3b7f806be0187f (diff) | |
| download | blackbird-op-linux-4eae2c9ae54a5ef3ca32370e3b28a6f83c61401f.tar.gz blackbird-op-linux-4eae2c9ae54a5ef3ca32370e3b28a6f83c61401f.zip | |
powerpc/powernv: Make pnv_powersave_common more generic
pnv_powersave_common does common steps needed before entering idle
state and eventually changes MSR to MSR_IDLE and does rfid to
pnv_enter_arch207_idle_mode.
Move the updation of HSTATE_HWTHREAD_STATE to pnv_powersave_common
from pnv_enter_arch207_idle_mode and make it more generic by passing the
rfid address as a function parameter.
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/idle_book3s.S | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S index 34dbfc925707..a8397e398817 100644 --- a/arch/powerpc/kernel/idle_book3s.S +++ b/arch/powerpc/kernel/idle_book3s.S @@ -75,6 +75,8 @@ core_idle_lock_held: * To check IRQ_HAPPENED in r4 * 0 - don't check * 1 - check + * + * Address to 'rfid' to in r5 */ _GLOBAL(pnv_powersave_common) /* Use r3 to pass state nap/sleep/winkle */ @@ -127,28 +129,28 @@ _GLOBAL(pnv_powersave_common) std r9,_MSR(r1) std r1,PACAR1(r13) +#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE + /* Tell KVM we're entering idle */ + li r4,KVM_HWTHREAD_IN_NAP + stb r4,HSTATE_HWTHREAD_STATE(r13) +#endif + /* * Go to real mode to do the nap, as required by the architecture. * Also, we need to be in real mode before setting hwthread_state, * because as soon as we do that, another thread can switch * the MMU context to the guest. */ - LOAD_REG_IMMEDIATE(r5, MSR_IDLE) + LOAD_REG_IMMEDIATE(r7, MSR_IDLE) li r6, MSR_RI andc r6, r9, r6 - LOAD_REG_ADDR(r7, pnv_enter_arch207_idle_mode) mtmsrd r6, 1 /* clear RI before setting SRR0/1 */ - mtspr SPRN_SRR0, r7 - mtspr SPRN_SRR1, r5 + mtspr SPRN_SRR0, r5 + mtspr SPRN_SRR1, r7 rfid .globl pnv_enter_arch207_idle_mode pnv_enter_arch207_idle_mode: -#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE - /* Tell KVM we're napping */ - li r4,KVM_HWTHREAD_IN_NAP - stb r4,HSTATE_HWTHREAD_STATE(r13) -#endif stb r3,PACA_THREAD_IDLE_STATE(r13) cmpwi cr3,r3,PNV_THREAD_SLEEP bge cr3,2f @@ -243,18 +245,21 @@ _GLOBAL(power7_idle) _GLOBAL(power7_nap) mr r4,r3 li r3,PNV_THREAD_NAP + LOAD_REG_ADDR(r5, pnv_enter_arch207_idle_mode) b pnv_powersave_common /* No return */ _GLOBAL(power7_sleep) li r3,PNV_THREAD_SLEEP li r4,1 + LOAD_REG_ADDR(r5, pnv_enter_arch207_idle_mode) b pnv_powersave_common /* No return */ _GLOBAL(power7_winkle) li r3,PNV_THREAD_WINKLE li r4,1 + LOAD_REG_ADDR(r5, pnv_enter_arch207_idle_mode) b pnv_powersave_common /* No return */ |
