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| author | Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> | 2014-07-29 13:10:01 (GMT) |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-08-05 06:33:48 (GMT) |
| commit | 0869b6fd209bda402576a9a559120ddd4f61198e (patch) | |
| tree | 90c66372cfa2764d65efb377a660ab35556b9427 /arch/powerpc/kernel/traps.c | |
| parent | 84f1966e25a2e13f02cf9689e863f57bb69cc9bd (diff) | |
| download | linux-0869b6fd209bda402576a9a559120ddd4f61198e.tar.xz | |
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/traps.c')
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index cb9cfe4..0dc43f9 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -302,6 +302,16 @@ long machine_check_early(struct pt_regs *regs) return handled; } +long hmi_exception_realmode(struct pt_regs *regs) +{ + __get_cpu_var(irq_stat).hmi_exceptions++; + + if (ppc_md.hmi_exception_early) + ppc_md.hmi_exception_early(regs); + + return 0; +} + #endif /* @@ -738,6 +748,20 @@ void SMIException(struct pt_regs *regs) die("System Management Interrupt", regs, SIGABRT); } +void handle_hmi_exception(struct pt_regs *regs) +{ + struct pt_regs *old_regs; + + old_regs = set_irq_regs(regs); + irq_enter(); + + if (ppc_md.handle_hmi_exception) + ppc_md.handle_hmi_exception(regs); + + irq_exit(); + set_irq_regs(old_regs); +} + void unknown_exception(struct pt_regs *regs) { enum ctx_state prev_state = exception_enter(); |