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| author | Dominik Dingel <dingel@linux.vnet.ibm.com> | 2013-06-17 16:25:18 +0200 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2014-01-30 12:50:39 +0100 |
| commit | 24eb3a824c4f3ccfaa2305dc1d9d9e2a708828c5 (patch) | |
| tree | a889cb48f43502fb8db57d40ef6f342382d638b6 /arch/s390/include | |
| parent | a91b8ebe8671980151e0a19ee9fec6b0e1ae1d58 (diff) | |
| download | op-kernel-dev-24eb3a824c4f3ccfaa2305dc1d9d9e2a708828c5.zip op-kernel-dev-24eb3a824c4f3ccfaa2305dc1d9d9e2a708828c5.tar.gz | |
KVM: s390: Add FAULT_FLAG_RETRY_NOWAIT for guest fault
In the case of a fault, we will retry to exit sie64 but with gmap fault
indication for this thread set. This makes it possible to handle async
page faults.
Based on a patch from Martin Schwidefsky.
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/pgtable.h | 2 | ||||
| -rw-r--r-- | arch/s390/include/asm/processor.h | 1 |
2 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 2204400..66101f6 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -767,6 +767,7 @@ static inline void pgste_set_pte(pte_t *ptep, pte_t entry) * @table: pointer to the page directory * @asce: address space control element for gmap page table * @crst_list: list of all crst tables used in the guest address space + * @pfault_enabled: defines if pfaults are applicable for the guest */ struct gmap { struct list_head list; @@ -775,6 +776,7 @@ struct gmap { unsigned long asce; void *private; struct list_head crst_list; + bool pfault_enabled; }; /** diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 0a876bc..dc5fc4f 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -79,6 +79,7 @@ struct thread_struct { unsigned long ksp; /* kernel stack pointer */ mm_segment_t mm_segment; unsigned long gmap_addr; /* address of last gmap fault. */ + unsigned int gmap_pfault; /* signal of a pending guest pfault */ struct per_regs per_user; /* User specified PER registers */ struct per_event per_event; /* Cause of the last PER trap */ unsigned long per_flags; /* Flags to control debug behavior */ |
