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powerpc/book3s: Add basic infrastructure to handle HMI in Linux.

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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>
This commit is contained in:
Mahesh Salgaonkar
2014-07-29 18:40:01 +05:30
committed by Benjamin Herrenschmidt
parent 84f1966e25
commit 0869b6fd20
13 changed files with 139 additions and 3 deletions
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4
arch/powerpc/include/asm/machdep.h
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@@ -174,6 +174,10 @@ struct machdep_calls {
/* Exception handlers */
int (*system_reset_exception)(struct pt_regs *regs);
int (*machine_check_exception)(struct pt_regs *regs);
int (*handle_hmi_exception)(struct pt_regs *regs);
/* Early exception handlers called in realmode */
int (*hmi_exception_early)(struct pt_regs *regs);
/* Called during machine check exception to retrive fixup address. */
bool (*mce_check_early_recovery)(struct pt_regs *regs);