diff options
Diffstat (limited to 'arch/powerpc/kernel/idle_book3s.S')
| -rw-r--r-- | arch/powerpc/kernel/idle_book3s.S | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S index dd8ca7fdf55a..4e5a4fed86c5 100644 --- a/arch/powerpc/kernel/idle_book3s.S +++ b/arch/powerpc/kernel/idle_book3s.S @@ -416,6 +416,31 @@ power9_dd1_recover_paca: blr /* + * Called from machine check handler for powersave wakeups. + * Low level machine check processing has already been done. Now just + * go through the wake up path to get everything in order. + * + * r3 - The original SRR1 value. + * Original SRR[01] have been clobbered. + * MSR_RI is clear. + */ +.global pnv_powersave_wakeup_mce +pnv_powersave_wakeup_mce: + /* Set cr3 for pnv_powersave_wakeup */ + rlwinm r11,r3,47-31,30,31 + cmpwi cr3,r11,2 + + /* + * Now put the original SRR1 with SRR1_WAKEMCE_RESVD as the wake + * reason into SRR1, which allows reuse of the system reset wakeup + * code without being mistaken for another type of wakeup. + */ + oris r3,r3,SRR1_WAKEMCE_RESVD@h + mtspr SPRN_SRR1,r3 + + b pnv_powersave_wakeup + +/* * Called from reset vector for powersave wakeups. * cr3 - set to gt if waking up with partial/complete hypervisor state loss */ |