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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/kvm/book3s_hv_rmhandlers.S | |
| parent | powerpc/iommu: Fix comments with it_page_shift (diff) | |
| download | linux-dev-0869b6fd209bda402576a9a559120ddd4f61198e.tar.xz linux-dev-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/kvm/book3s_hv_rmhandlers.S')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_rmhandlers.S | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index 868347ef09fd..0de9309b9a55 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -159,6 +159,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) cmpwi r12, BOOK3S_INTERRUPT_EXTERNAL BEGIN_FTR_SECTION beq 11f + cmpwi cr2, r12, BOOK3S_INTERRUPT_HMI + beq cr2, 14f /* HMI check */ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) /* RFI into the highmem handler, or branch to interrupt handler */ @@ -179,6 +181,10 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) 13: b machine_check_fwnmi +14: mtspr SPRN_HSRR0, r8 + mtspr SPRN_HSRR1, r7 + b hmi_exception_after_realmode + kvmppc_primary_no_guest: /* We handle this much like a ceded vcpu */ /* set our bit in napping_threads */ |