- 22 Apr, 2014 40 commits
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David Hildenbrand authored
Whenever a program interrupt is intercepted, some parameters are stored in the sie control block. These parameters have to be extracted in order to be reinjected correctly. This patch also takes care of intercepted PER events which can occurr in addition to any program interrupt. Signed-off-by:
David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by:
Christian Borntraeger <borntraeger@de.ibm.com>
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Jens Freimann authored
This patch adds fields which are currently missing but needed for the correct injection of interrupts. This is based on a patch by David Hildenbrand Signed-off-by:
Jens Freimann <jfrei@linux.vnet.ibm.com> Acked-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
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Jens Freimann authored
per_perc_atmid is currently a two-byte field that combines two fields, the PER code and the PER Addressing-and-Translation-Mode Identification (ATMID) Let's make them accessible indepently and also rename per_cause to per_code. Signed-off-by:
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Jens Freimann authored
According to the Principles of Operation, at offset 0xA3 in the lowcore we have the "Architectural-Mode identification", not an "access identification". Signed-off-by:
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Heiko Carstens authored
Add kerneldoc comment to kvm_s390_real_to_abs() and change the code so it matches the coding style of the rest of gaccess.h. Signed-off-by:
Thomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by:
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Heiko Carstens authored
Signed-off-by:
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Heiko Carstens authored
Convert handle_stsi() to new guest access functions. Signed-off-by:
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Heiko Carstens authored
Convert handle lctl[g]() to new guest access functions. Signed-off-by:
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Heiko Carstens authored
Convert handle_stidp() to new guest access functions. Signed-off-by:
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Heiko Carstens authored
Convert handle_lpsw[e]() to new guest access functions. Signed-off-by:
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Cornelia Huck authored
The tpi instruction should be suppressed on addressing and protection exceptions, so we need to re-inject the dequeued io interrupt in that case. Signed-off-by:
Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
Convert handle_tpi() to new guest access functions. The code now sets up a structure which is copied with a single call to guest space instead of issuing several separate guest access calls. This is necessary since the to be copied data may cross a page boundary. If a protection exception happens while accessing any of the pages, the instruction is suppressed and may not have modified any memory contents. Signed-off-by:
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Heiko Carstens authored
Convert handle_test_block() to new guest access functions. Signed-off-by:
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Heiko Carstens authored
Convert handle_store_cpu_address() to new guest access functions. Signed-off-by:
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Heiko Carstens authored
Convert handle_store_prefix() to new guest access functions. Signed-off-by:
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Heiko Carstens authored
Convert handle_set_clock() to new guest access functions. Signed-off-by:
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Heiko Carstens authored
Convert __sigp_set_prefix() and handle_set_prefix() to new guest access functions. Signed-off-by:
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Heiko Carstens authored
Convert kvm_s390_store_status_unloaded() to new guest access functions. Signed-off-by:
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Heiko Carstens authored
Convert handle_prog() to new guest access functions. Also make the code a bit more readable and look at the return code of write_guest_lc() which was missing before. Signed-off-by:
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Heiko Carstens authored
Convert pfault code to new guest access functions. Signed-off-by:
Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by:
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Heiko Carstens authored
Convert handle_stfl() to new guest access functions. Signed-off-by:
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Jens Freimann authored
Convert local irqs in __do_deliver_interrupt() to new guest access functions. Signed-off-by:
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Heiko Carstens authored
Convert __do_deliver_interrupt() to new guest access functions. Signed-off-by:
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Heiko Carstens authored
Signed-off-by:
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Heiko Carstens authored
Check if siif is available before setting. Signed-off-by:
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Heiko Carstens authored
The new guest memory access function write_guest() and read_guest() can be used to access guest memory in an architecture compliant way. These functions will look at the vcpu's PSW and select the correct address space for memory access and also perform correct address wrap around. In case DAT is turned on, page tables will be walked otherwise access will happen to real or absolute memory. Any access exception will be recognized and exception data will be stored in the vcpu's kvm_vcpu_arch.pgm member. Subsequently an exception can be injected if necessary. Missing are: - key protection checks - access register mode support - program event recording support This patch also adds write_guest_real(), read_guest_real(), write_guest_absolute() and read_guest_absolute() guest functions which can be used to access real and absolute storage. These functions currently do not perform any access checks, since there is no use case (yet?). Signed-off-by:
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Heiko Carstens authored
put_guest_lc, read_guest_lc and write_guest_lc are guest access functions which shall only be used to access the lowcore of a vcpu. These functions should be used for e.g. interrupt handlers where no guest memory access protection facilities, like key or low address protection, are applicable. At a later point guest vcpu lowcore access should happen via pinned prefix pages, so that these pages can be accessed directly via the kernel mapping. All of these *_lc functions can be removed then. Signed-off-by:
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Heiko Carstens authored
Add a 'struct kvm_s390_pgm_info pgm' member to kvm_vcpu_arch. This structure will be used if during instruction emulation in the context of a vcpu exception data needs to be stored somewhere. Also add a helper function kvm_s390_inject_prog_cond() which can inject vcpu's last exception if needed. Signed-off-by:
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Heiko Carstens authored
Add kvm_s390_logical_to_effective() helper which converts a guest vcpu's logical storage address to a guest vcpu effective address by applying the rules of the vcpu's addressing mode defined by PSW bits 31 and 32 (extendended and basic addressing mode). Depending on the vcpu's addressing mode the upper 40 bits (24 bit addressing mode), 33 bits (31 bit addressing mode) or no bits (64 bit addressing mode) will be zeroed and the remaining bits will be returned. Signed-off-by:
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Heiko Carstens authored
Add 'union ctlreg0_bits' to easily allow setting and testing bits of control register 0 bits. This patch only adds the bits needed for the new guest access functions. Other bits and control registers can be added when needed. Signed-off-by:
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Heiko Carstens authored
Introduce a 'struct psw' which makes it easier to decode and test if certain bits in a psw are set or are not set. In addition also add a 'psw_bits()' helper define which allows to directly modify and test a psw_t structure. E.g. psw_t psw; psw_bits(psw).t = 1; /* set dat bit */ Signed-off-by:
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Heiko Carstens authored
Make test_vfacility() available for other files. This is needed for the new guest access functions, which test if certain facilities are available for a guest. Signed-off-by:
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Heiko Carstens authored
It's quite common (in the s390 guest access code) to test if a guest physical address points to a valid guest memory area or not. So add a simple helper function in common code, since this might be of interest for other architectures as well. Signed-off-by:
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Jens Freimann authored
Add a new data structure and function that allows to inject all kinds of interrupt as defined in the PoP Signed-off-by:
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Dominik Dingel authored
To enable CMMA and to reset its state we use the vm kvm_device ioctls, encapsulating attributes within the KVM_S390_VM_MEM_CTRL group. Signed-off-by:
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Dominik Dingel authored
When userspace reset the guest without notifying kvm, the CMMA state of the pages might be unused, resulting in guest data corruption. To avoid this, CMMA must be enabled only if userspace understands the implications. CMMA must be enabled before vCPU creation. It can't be switched off once enabled. All subsequently created vCPUs will be enabled for CMMA according to the CMMA state of the VM. Signed-off-by:
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Dominik Dingel authored
We sometimes need to get/set attributes specific to a virtual machine and so need something else than ONE_REG. Let's copy the KVM_DEVICE approach, and define the respective ioctls for the vm file descriptor. Signed-off-by:
Alexander Graf <agraf@suse.de> Signed-off-by:
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Jason J. Herne authored
Replace the kvm_s390_sync_dirty_log() stub with code to construct the KVM dirty_bitmap from S390 memory change bits. Also add code to properly clear the dirty_bitmap size when clearing the bitmap. Signed-off-by:
Jason J. Herne <jjherne@us.ibm.com> CC: Dominik Dingel <dingel@linux.vnet.ibm.com> [Dominik Dingel: use gmap_test_and_clear_dirty, locking fixes] Signed-off-by:
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Dominik Dingel authored
For live migration kvm needs to test and clear the dirty bit of guest pages. That for is ptep_test_and_clear_user_dirty, to be sure we are not racing with other code, we protect the pte. This needs to be done within the architecture memory management code. Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
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Martin Schwidefsky authored
Switch the user dirty bit detection used for migration from the hardware provided host change-bit in the pgste to a fault based detection method. This reduced the dependency of the host from the storage key to a point where it becomes possible to enable the RCP bypass for KVM guests. The fault based dirty detection will only indicate changes caused by accesses via the guest address space. The hardware based method can detect all changes, even those caused by I/O or accesses via the kernel page table. The KVM/qemu code needs to take this into account. Signed-off-by:
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