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authorMahesh Salgaonkar <mahesh@linux.vnet.ibm.com>2014-07-29 18:40:01 +0530
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2014-08-05 16:33:48 +1000
commit0869b6fd209bda402576a9a559120ddd4f61198e (patch)
tree90c66372cfa2764d65efb377a660ab35556b9427 /arch/powerpc/kernel/entry_64.S
parent84f1966e25a2e13f02cf9689e863f57bb69cc9bd (diff)
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.S5
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;