- 16 5月, 2014 7 次提交
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由 David Hildenbrand 提交于
If the sigp interpretation facility is installed, most SIGP EXTERNAL CALL operations will be interpreted instead of intercepted. A partial execution interception will occurr at the sending cpu only if the target cpu is in the wait state ("W" bit in the cpuflags set). Instruction interception will only happen in error cases (e.g. cpu addr invalid). As a sending cpu might set the external call interrupt pending flags at the target cpu at every point in time, we can't handle this kind of interrupt using our kvm interrupt injection mechanism. The injection will be done automatically by the SIE when preparing the start of the target cpu. Signed-off-by: NDavid Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> CC: Thomas Huth <thuth@linux.vnet.ibm.com> [Adopt external call injection to check for sigp interpretion] Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Alexander Yarygin 提交于
The current trace definition doesn't work very well with the perf tool. Perf shows a "insn_to_mnemonic not found" message. Let's handle the decoding completely in a parseable format. Signed-off-by: NAlexander Yarygin <yarygin@linux.vnet.ibm.com> Acked-by: NChristian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Alexander Yarygin 提交于
Use the symbolic translation tables from sie.h for decoding diag, sigp and sie exit codes. Signed-off-by: NAlexander Yarygin <yarygin@linux.vnet.ibm.com> Acked-by: NChristian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Thomas Huth 提交于
Use the new helper function kvm_arch_fault_in_page() for faulting-in the guest pages and only inject addressing errors when we've really hit a bad address (and return other error codes to userspace instead). Signed-off-by: NThomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: NChristian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Thomas Huth 提交于
Rework the function kvm_arch_fault_in_sync() to become a proper helper function for faulting-in a guest page. Now it takes the guest address as a parameter and does not ignore the possible error code from gmap_fault() anymore (which could cause undetected error conditions before). Signed-off-by: NThomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: NChristian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Thomas Huth 提交于
If the new PSW for program interrupts is invalid, the VM ends up in an endless loop of specification exceptions. Since there is not much left we can do in this case, we should better drop to userspace instead so that the crash can be reported to the user. Signed-off-by: NThomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Thomas Huth 提交于
As a program status word is also invalid (and thus generates an specification exception) if the instruction address is not even, we should test this in is_valid_psw(), too. This patch also exports the function so that it becomes available for other parts of the S390 KVM code as well. Signed-off-by: NThomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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- 06 5月, 2014 3 次提交
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由 Thomas Huth 提交于
The external interrupt interception can only occur in rare cases, e.g. when the PSW of the interrupt handler has a bad value. The old handler for this interception simply ignored these events (except for increasing the exit_external_interrupt counter), but for proper operation we either have to inject the interrupts manually or we should drop to userspace in case of errors. Signed-off-by: NThomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: NDavid Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Thomas Huth 提交于
Add an interface to inject clock comparator and CPU timer interrupts into the guest. This is needed for handling the external interrupt interception. Signed-off-by: NThomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: NDavid Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Dan Carpenter 提交于
When copy_from_user() fails, this code returns the number of bytes remaining instead of a negative error code. The positive number is returned to the user but otherwise it is harmless. Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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- 29 4月, 2014 6 次提交
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由 David Hildenbrand 提交于
This patch enables the IBS facility when a single VCPU is running. The facility is dynamically turned on/off as soon as other VCPUs enter/leave the stopped state. When this facility is operating, some instructions can be executed faster for single-cpu guests. Signed-off-by: NDavid Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: NDominik Dingel <dingel@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 David Hildenbrand 提交于
This patch introduces two new functions to set/clear the CPUSTAT_STOPPED bit and makes use of it at all applicable places. These functions prepare the additional execution of code when starting/stopping a vcpu. The CPUSTAT_STOPPED bit should not be touched outside of these functions. Signed-off-by: NDavid Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Thomas Huth 提交于
TEST BLOCK is also subject to the low-address protection, so we need to check the destination address in our handler. Signed-off-by: NThomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Thomas Huth 提交于
Add a check for low-address protection to the PFMF handler and convert real-addresses to absolute if necessary, as it is defined in the Principles of Operations specification. Signed-off-by: NThomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Thomas Huth 提交于
The s390 architecture has a special protection mechanism that can be used to prevent write access to the vital data in the low-core memory area. This patch adds a new helper function that can be used to check for such write accesses and in case of protection, it also sets up the exception data accordingly. Signed-off-by: NThomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Thomas Huth 提交于
When the guest executes the MVPG instruction with DAT disabled, and the source or destination page is not mapped in the host, the so-called partial execution interception occurs. We need to handle this event by setting up a mapping for the corresponding user pages. Signed-off-by: NThomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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- 22 4月, 2014 24 次提交
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由 Michael Mueller 提交于
Factor out the new function handle_itdb(), which copies the ITDB into guest lowcore to fully handle a TX abort. Signed-off-by: NMichael Mueller <mimu@linux.vnet.ibm.com> Acked-by: NChristian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Michael Mueller 提交于
The generically assembled low core labels already contain the address for the TDB. Signed-off-by: NMichael Mueller <mimu@linux.vnet.ibm.com> Acked-by: NChristian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Christian Borntraeger 提交于
On hard exits (abort, sigkill) we have have some kvm_s390_interrupt_info structures hanging around. Delete those on exit to avoid memory leaks. Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com> CC: stable@vger.kernel.org Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com>
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由 David Hildenbrand 提交于
When a guest is single-stepped, we want to disable timer interrupts. Otherwise, the guest will continuously execute the external interrupt handler and make debugging of code where timer interrupts are enabled almost impossible. The delivery of timer interrupts can be enforced in such sections by setting a breakpoint and continuing execution. In order to disable timer interrupts, they are disabled in the control register of the guest just before SIE entry and are suppressed in the interrupt check/delivery methods. Signed-off-by: NDavid Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 David Hildenbrand 提交于
This patch moves the checks for enabled timer (clock-comparator) interrupts and pending timer interrupts into own functions, making the code better readable and easier to maintain. The method kvm_cpu_has_pending_timer is filled with life. Signed-off-by: NDavid Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 David Hildenbrand 提交于
This patch adds support to debug the guest using the PER facility on s390. Single-stepping, hardware breakpoints and hardware watchpoints are supported. In order to use the PER facility of the guest without it noticing it, the control registers of the guest have to be patched and access to them has to be intercepted(stctl, stctg, lctl, lctlg). All PER program interrupts have to be intercepted and only the relevant PER interrupts for the guest have to be given back. Special care has to be taken about repeated exits on the same hardware breakpoint. The intervention of the host in the guests PER configuration is not fully transparent. PER instruction nullification can not be used by the guest and too many storage alteration events may be reported to the guest (if it is activated for special address ranges only) when the host concurrently debugging it. Signed-off-by: NDavid Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 David Hildenbrand 提交于
Introduce the methods to emulate the stctl and stctg instruction. Added tracing code. Signed-off-by: NDavid Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 David Hildenbrand 提交于
When a program interrupt was to be delivered until now, no program interrupt parameters were stored in the low-core of the target vcpu. This patch enables the delivery of those program interrupt parameters, takes care of concurrent PER events which can be injected in addition to any program interrupt and uses the correct instruction length code (depending on the interception code) for the injection of program interrupts. Signed-off-by: NDavid Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 David Hildenbrand 提交于
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: NDavid Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Heiko Carstens 提交于
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: NHeiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Heiko Carstens 提交于
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Heiko Carstens 提交于
Convert handle_stsi() to new guest access functions. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Heiko Carstens 提交于
Convert handle lctl[g]() to new guest access functions. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Heiko Carstens 提交于
Convert handle_stidp() to new guest access functions. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Heiko Carstens 提交于
Convert handle_lpsw[e]() to new guest access functions. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Cornelia Huck 提交于
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: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Heiko Carstens 提交于
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: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Heiko Carstens 提交于
Convert handle_test_block() to new guest access functions. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Heiko Carstens 提交于
Convert handle_store_cpu_address() to new guest access functions. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Heiko Carstens 提交于
Convert handle_store_prefix() to new guest access functions. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Heiko Carstens 提交于
Convert handle_set_clock() to new guest access functions. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Heiko Carstens 提交于
Convert __sigp_set_prefix() and handle_set_prefix() to new guest access functions. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Heiko Carstens 提交于
Convert kvm_s390_store_status_unloaded() to new guest access functions. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Heiko Carstens 提交于
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: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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