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| author | Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> | 2014-07-29 18:40:01 +0530 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-08-05 16:33:48 +1000 |
| commit | 0869b6fd209bda402576a9a559120ddd4f61198e (patch) | |
| tree | 90c66372cfa2764d65efb377a660ab35556b9427 /arch/powerpc/kernel/entry_64.S | |
| parent | 84f1966e25a2e13f02cf9689e863f57bb69cc9bd (diff) | |
| download | lwn-0869b6fd209bda402576a9a559120ddd4f61198e.tar.gz lwn-0869b6fd209bda402576a9a559120ddd4f61198e.zip | |
powerpc/book3s: Add basic infrastructure to handle HMI in Linux.
Handle Hypervisor Maintenance Interrupt (HMI) in Linux. This patch implements
basic infrastructure to handle HMI in Linux host. The design is to invoke
opal handle hmi in real mode for recovery and set irq_pending when we hit HMI.
During check_irq_replay pull opal hmi event and print hmi info on console.
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/entry_64.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index d6b22e8c8ee1..5bbd1bc8c3b0 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -915,6 +915,11 @@ restore_check_irq_replay: addi r3,r1,STACK_FRAME_OVERHEAD; bl do_IRQ b ret_from_except +1: cmpwi cr0,r3,0xe60 + bne 1f + addi r3,r1,STACK_FRAME_OVERHEAD; + bl handle_hmi_exception + b ret_from_except 1: cmpwi cr0,r3,0x900 bne 1f addi r3,r1,STACK_FRAME_OVERHEAD; |