Commit Graph

110 Commits

Author SHA1 Message Date
David Hildenbrand
6e6ad8db11 s390x/kvm: execute sigp orders on the target vcpu thread
All sigp orders that can result in ioctls on the target vcpu should be executed
on the associated vcpu thread.

Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-09-01 09:23:02 +02:00
Jason J. Herne
85ad6230b3 s390x/kvm: synchronize guest floating point registers
Add code to kvm_arch_get_registers and kvm_arch_put_registers to
save/restore floating point registers. This missing sync was
unnoticed until migration of userspace that uses fprs.

Signed-off-by: Jason J. Herne <jjherne@us.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
[Update patch to latest upstream]
Cc: qemu-stable@nongnu.org
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-07-14 09:15:38 +02:00
Wenchao Xia
3a44969037 qapi event: convert GUEST_PANICKED
'monitor.h' is still included in target-s390x/kvm.c, since I have
no good way to verify whether other code need it on my x86 host.

Signed-off-by: Wenchao Xia <wenchaoqemu@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2014-06-23 11:12:28 -04:00
Cornelia Huck
bbd8bb8e32 s390x/kvm: inject via flic
Try to inject floating interrupts via the flic if it is available.
This allows us to inject the full range of floating interrupts.

Reviewed-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-10 09:50:27 +02:00
Cornelia Huck
de13d21614 s390x: cleanup interrupt injection
Remove the need for a cpu to inject a floating interrupt on kvm.

Acked-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-10 09:50:27 +02:00
Cornelia Huck
66ad0893f0 s390x/kvm: add alternative injection interface
Add kvm_s390_{vcpu,floating}_interrupt, which offer the possibility
to inject interrupts with larger payloads (when a kvm backend becomes
available).

Moreover, kvm_s390_floating_interrupt() does no longer have the bogus
requirement for a vcpu.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-10 09:50:27 +02:00
Cornelia Huck
79afc36d91 s390x: consolidate floating interrupts
Move the injection code for all floating interrupts to interrupt.c
and add a comment.

Also get rid of the #ifdef CONFIG_KVM for the service interrupt.

Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-10 09:50:27 +02:00
Thomas Huth
6449a41a4d s390x/kvm: Log unmanageable program interruptions
The kernel only drops to userspace if an endless program interrupt loop
has been detected. Let's print an error message in this case to inform
the user about the crash and stop the affected CPU with a panic event,
just like it is already done for the external interruption loop detection.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-10 09:50:27 +02:00
Thomas Huth
a2689242b1 s390x/kvm: Log unmanageable external interruptions
Interception code 0x14 only drops to userspace when an unmanageable
external interruption interception occured (e.g. if the External New
PSW does not disable external interruptions). Instead of bailing out
via the default handler, it is better to inform the user with a
proper error message that also includes the bad PSW, and to stop
the affected CPU with a panic event instead.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-10 09:50:27 +02:00
Dominik Dingel
4cb88c3c37 s390x/kvm: enable/reset cmma via vm attributes
Exploit the new api for userspace-controlled cmma. If supported, enable
cmma during kvm initialization and register a reset handler for cmma,
which is also called directly from the load IPL code.

The reset functionality is needed to reset the cmma state of the guest
pages, e.g. if a system reset is triggered via qemu monitor; otherwise
this could result in data corruption.

A guest triggered reboot may now lead to multiple cmma resets; this is
OK, however, as this is slowpath anyway and the simplest way to achieve
the intended effects.

Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-10 09:50:27 +02:00
David Hildenbrand
770a63792b s390x/kvm: hw debugging support via guest PER facility
This patch makes use of the hw debugging support in kvm (provided by the guest's
PER facility) on s390. It enables the following features, available using the
gdbserver:
- single-stepping
- hw breakpoints
- hw watchpoints

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-05-20 13:05:58 +02:00
David Hildenbrand
b30f4dfbda s390x/kvm: software breakpoint support
This patch allows to insert and remove sw breakpoints using the QEMU gdbserver
on s390 as well as to interrupt execution on a breakpoint hit when running
with KVM enabled.

Whenever a software breakpoint is inserted, common code calls kvm ioctl
KVM_UPDATE_GUEST_DEBUG. As this method's default on s390 is to return an error
if not implement, the insertion will fail. Therefore, KVM also has to be
updated in order to make use of software breakpoints.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-05-20 13:05:58 +02:00
David Hildenbrand
8e4e86afa5 s390x: remove duplicate definitions of DIAG 501
When restoring the previously saved instruction in
kvm_arch_remove_sw_breakpoint(), we only restored one byte. Let's use
the sizeof() operator to make sure we restore the entire instruction.

While we are at it, let's remove the duplicate definitions of DIAG 501
and replace its size (used when reading/writing the instruction) with
a sizeof() operator to make the code self explaining and less error-prone.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-05-20 13:05:58 +02:00
Cornelia Huck
d426d9fba8 s390x/virtio-ccw: wire up irq routing and irqfds
Make use of the new s390 adapter irq routing support to enable real
in-kernel irqfds for virtio-ccw with adapter interrupts.

Note that s390 doesn't provide the common KVM_CAP_IRQCHIP capability, but
rather needs KVM_CAP_S390_IRQCHIP to be enabled. This is to ensure backward
compatibility.

Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-05-20 13:05:58 +02:00
Paolo Bonzini
50a2c6e55f kvm: reset state from the CPU's reset method
Now that we have a CPU object with a reset method, it is better to
keep the KVM reset close to the CPU reset.  Using qemu_register_reset
as we do now keeps them far apart.

With this patch, PPC no longer calls the kvm_arch_ function, so
it can get removed there.  Other arches call it from their CPU
reset handler, and the function gets an ARMCPU/X86CPU/S390CPU.

Note that ARM- and s390-specific functions are called kvm_arm_*
and kvm_s390_*, while x86-specific functions are called kvm_arch_*.
That follows the convention used by the different architectures.
Changing that is the topic of a separate patch.

Reviewed-by: Gleb Natapov <gnatapov@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-05-13 13:12:40 +02:00
Cornelia Huck
ada4135f84 kvm: make one_reg helpers available for everyone
s390x introduced helper functions for getting/setting one_regs with
commit 860643bc. However, nothing about these is s390-specific.

Alexey Kardashevskiy had already posted a general version, so let's
merge the two patches and massage the code a bit.

CC: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-05-13 13:11:08 +02:00
Cornelia Huck
e080f0fdff s390x: use kvm_vcpu_enable_cap()
Make kvm_s390_enable_css_support() use new interface.

Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-04-30 14:39:49 +02:00
Christian Borntraeger
44b0c0bbb5 s390x/kvm: sync gbea and pp register
We also need to sync guest breaking event address and program parameter
register for migration support.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-04-25 12:59:57 +02:00
Christian Borntraeger
860643bc5a s390x/kvm: rework KVM synchronize to tracing for some ONEREGS
Some ONE_REGS on s390 are not protected by a capability. Older kernels
might not provide those and return an error. Fortunately these registers
are only critical for the migration path. There is no need to error out
on reset and normal runtime. Furthermore, these kernels don't provide
a proper dirty bitmap anyway, so let's use tracing for those errors.

Also provide generic one reg helper to simplify the code.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-04-25 12:59:57 +02:00
David Hildenbrand
8c0124490b s390x: empty function stubs in preparation for __KVM_HAVE_GUEST_DEBUG
This patch creates empty function stubs (used by the gdbserver) in preparation
for the hw debugging support by kvm on s390, which will enable the
__KVM_HAVE_GUEST_DEBUG define in the linux headers and require these methods on
the qemu side.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-04-25 11:07:02 +02:00
Cornelia Huck
7e7494627f s390x/virtio-ccw: Adapter interrupt support.
Handle the new CCW_CMD_SET_IND_ADAPTER command enabling adapter interrupts
on guest request. When active, host->guest notifications will be handled
via global_indicator -> queue indicators instead of queue indicators +
subchannel I/O interrupt. Indicators for virtqueues may be present at an
offset.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-03-05 09:42:05 +01:00
Frank Blaschka
1eecf41b3e s390x/kvm: Rework priv instruction handlers
The current implementation uses the second byte of the instruction
to identify the instruction handler. This is not sufficient to
support instructions not starting with 0xb2. This patch
adds separate handlers for 0xb2, 0xb9 and 0xeb to be able to
support the full instruction set.

Signed-off-by: Frank Blaschka <blaschka@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-02-27 09:51:26 +01:00
Thomas Huth
04c2b5168e s390x/kvm: Add missing SIGP CPU RESET order
The SIGP order CPU RESET was still missing in the list of our
supported handler. This patch now adds a simple implementation,
by using the cpu_reset() function that is already available in
target-s390x/cpu.c.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-02-27 09:51:26 +01:00
Thomas Huth
f7d3e46676 s390x/kvm: Rework SIGP INITIAL CPU RESET handler
The s390_cpu_initial_reset() function had two deficiencies: First, it
used an ioctl for the destination CPU, and this ioctl could block
nearly forever, as long as the destination CPU was running in the SIE
loop. Second, it also cleared the general purpose registers - something
it should not do according to the Principles of Operations.
Since we've already got another function for the initial CPU reset in
cpu.c, we can also use that function instead. And by using run_on_cpu()
for executing this code, we make sure that the destination CPU is
correctly kicked out of kernel mode now.

Suggested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-02-27 09:51:26 +01:00
Thomas Huth
e8803d93df s390x/sclp: Fixed setting of condition code register
In the SCLP handler function, the condition code register must
only be set if no exception occured.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-02-27 09:51:25 +01:00
Thomas Huth
6e25280216 s390x/sclp: Add missing checks to SCLP handler
If the 51 most significant bits of the SCCB address are zero or equal to
the prefix, we should throw an specification exception, too.
Also moved the check for privileged mode to sclp_service_call() to have
all program checks in one place now.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-02-27 09:51:25 +01:00
Thomas Huth
a0fa2cb8cc s390x/sclp: Fixed the size of sccb and code parameter
The pointer to the SCCB should not be limited to 32 bits only.
In contrast to this, the command word parameter is only 32 bits
(the upper 32 bits should be ignored).

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-02-27 09:51:25 +01:00
Thomas Huth
77319f2263 s390x/virtio-hcall: Specification exception for illegal subcodes
So far, the DIAG 500 hypervisor call was only setting -EINVAL in
R2 when a guest tried to call this function with an illegal subcode.
This patch now changes the behavior so that a specification exception
is thrown instead, since this is the common behavior of other DIAG
functions (and other CPU instructions) when being called with illegal
parameters.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-02-27 09:51:25 +01:00
Thomas Huth
0788082a4b s390x/kvm: Fixed bad SIGP SET-ARCHITECTURE handler
The SET-ARCHITECTURE handler in QEMU caused a program interruption.
This is wrong according to the "Principles of Operations" specification
(since SIGP should never cause a program interrupt) and was likely only
introduced for debugging purposes. Since we handle SET-ARCHITECTURE in
the kernel already and only dropped to user space in case of bad mode
parameters, we should just report INVALID PARAMETER in QEMU instead.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-02-27 09:51:25 +01:00
Dominik Dingel
819bd3091e s390x/async_pf: Check for apf extension and enable pfault
S390 can also use async page faults, to enhance guest scheduling.
In case of live migration we want to disable the feature and let
all pending request finish.

Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-02-27 09:51:25 +01:00
Dominik Dingel
44c68de044 s390x/kvm: cleanup partial register handling
The partial register handling (introduced with commits
420840e58b and
3474b67948 ) aimed to improve intercept
handling performance.

It made the code more complicated though. During development for life
migration/init/reset etc it turned out that this might cause several
hard to debug programming errors. With the introduction of ioeventfd
(and future irqfd patches) the qemu intercept handlers are no longer
hot-path. And therefore the partial register handling can be
removed to simplify the code.

Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
CC: Jason J. Herne <jjherne@us.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Alexander Graf <agraf@suse.de>
2014-01-31 09:43:44 +01:00
Thomas Huth
3796f0e1cd s390x/kvm: Fixed condition code for unknown SIGP orders
If SIGP is called with an unknown order code, it has to return CC1
instead of CC3 and set the "invalid order" bit in the return status.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2013-12-18 14:24:10 +01:00
Thomas Huth
b8031adba7 s390x/kvm: Simplified the calculation of the SIGP order code
We've already got a helper function for calculating the
base/displacement of RS formatted instructions, so we can
get rid of the manual calculation of the SIGP order code.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2013-12-18 14:24:10 +01:00
Thomas Huth
b20a461fcd s390x/kvm: Implemented SIGP START
This patch adds the missing START order to the SIGP instruction handler.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2013-12-18 14:24:10 +01:00
Thomas Huth
0b9972a248 s390x/kvm: Fix coding style in handle_sigp()
To make scripts/checkpatch.pl happy for the following patches,
the coding style in handle_sigp() has to be fixed first.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2013-12-18 14:24:10 +01:00
Thomas Huth
cd7a0f4cf9 s390x/kvm: Removed s390_store_status stub
The SIGP order STORE STATUS AT ADDRESS will be handled in
kernel space, so we do not need the stub in QEMU anymore.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2013-12-18 14:24:10 +01:00
Thomas Huth
4f91e0b5d8 s390x/kvm: Removed duplicated SIGP defines
The SIGP order defines are also available in cpu.h,
so there is no need to re-define them in kvm.c.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2013-12-18 14:24:10 +01:00
Cornelia Huck
638129ff47 s390x/kvm: Fix diagnose handling.
The instruction intercept handler for diagnose used only the displacement
when trying to calculate the function code. This is only correct for base
0, however; we need to perform a complete base/displacement address
calculation and use bits 48-63 as the function code.

Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2013-12-18 14:24:10 +01:00
Stefan Weil
575ddeb459 exec: Fix prototype of phys_mem_set_alloc and related functions
phys_mem_alloc and its assigned values qemu_anon_ram_alloc and
legacy_s390_alloc must have identical argument lists.

legacy_s390_alloc uses the size parameter to call mmap, so size_t is
good enough for all of them.

This patch fixes compiler errors on i686 Linux hosts:

  CC    alpha-softmmu/exec.o
exec.c:752:51: error:
 initialization from incompatible pointer type [-Werror]
exec.c: In function 'qemu_ram_alloc_from_ptr':
exec.c:1139:32: error:
 comparison of distinct pointer types lacks a cast [-Werror]
exec.c: In function 'qemu_ram_remap':
exec.c:1283:21: error:
 comparison of distinct pointer types lacks a cast [-Werror]

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-id: 1380481005-32399-1-git-send-email-sw@weilnetz.de
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
2013-10-14 08:50:34 -07:00
Thomas Huth
5d9bf1c07c s390/ioinst: Moved the CC setting to the IO instruction handlers
The IO instruction handlers now take care of setting the CC value on
their own, so that the confusing return code magic in kvm_handle_css_inst()
is not needed anymore.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2013-09-20 12:46:53 +02:00
Thomas Huth
3d0a615fe9 s390/cpu: Make setcc() function available to other files
Moved the setcc() function to cpu.h so that it can be used by other
files, too. It now also does not modify the kvm state anymore since
this gets updated during kvm_arch_put_registers() anyway.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2013-09-20 12:46:53 +02:00
Thomas Huth
3ac85fb666 s390/kvm: Add check for priviledged SCLP handler
The SCLP instruction is priviledged, so we should make sure that
we generate an exception when it is called from the problem state.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2013-09-20 12:46:52 +02:00
Markus Armbruster
39228250ce exec: Don't abort when we can't allocate guest memory
We abort() on memory allocation failure.  abort() is appropriate for
programming errors.  Maybe most memory allocation failures are
programming errors, maybe not.  But guest memory allocation failure
isn't, and aborting when the user asks for more memory than we can
provide is not nice.  exit(1) instead, and do it in just one place, so
the error message is consistent.

Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-id: 1375276272-15988-8-git-send-email-armbru@redhat.com
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
2013-09-12 11:45:32 -05:00
Markus Armbruster
91138037cb exec: Simplify the guest physical memory allocation hook
Make it a generic hook rather than a KVM hook.  Less code and
ifdeffery.

Since the only user of the hook is old S390 KVM, there's hope we can
get rid of it some day.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Message-id: 1375276272-15988-5-git-send-email-armbru@redhat.com
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
2013-09-12 11:45:31 -05:00
Eugene (jno) Dvurechenski
7f7f975295 s390: wire up nmi command to raise a RESTART interrupt on S390
There is the 'nmi' command that is used to trigger a guest dump via kdump feature on x86.
s390 uses RESTART interrupt to trigger kdump.
So, this patch provides a mean to use 'nmi' command on s390 to raise RESTART interrupt.

The CPU to receive the RESTART interrupt is the "default" one.

There is an infrastructure to select the "default" CPU using 'cpu' command.
The 'info cpus' command can be used to see which one is the "default".

In order to wire up the RESTART to 'nmi' command we had to:
1. implement the kvm_s390_cpu_restart function by exporting the existing code
2. implement s390_cpu_restart function as kvm-aware wrapper
3. modify the qmp_inject_nmi function to enable (for s390) the scan for
   "default" CPU and call s390_cpu_restart for it;
3. fix some messages.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Alexander Graf <agraf@suse.de>
2013-08-30 14:16:48 +02:00
Eugene (jno) Dvurechenski
268846ba93 s390/kvm: basic implementation of diagnose 308 subcode 6
Linux uses a check for subcode 6 to decide if other subcodes are
available. Provide a minimal implementation for subcode 6, as well
as for subcode 5.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
[Move code from kvm.c into misc_helper.c]
2013-08-30 12:48:25 +02:00
Christian Borntraeger
39fbc5c62c s390x/kvm: Fix switch/case indentation for handle_diag
This alignes case statements to switch statements in the handle_diag
function as mandated by coding style.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2013-08-30 11:09:13 +02:00
Thomas Huth
d2ee774616 s390x/kvm: Remove redundant return code
Removed the redundant return code statement from handle_instruction() - it
always returned 0 and never reports any errors to its caller, since errors
from the sub-functions are already reported via program exceptions instead.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2013-07-30 16:12:25 +02:00
Thomas Huth
c1e8dfb5e8 s390x/kvm: Reworked/fixed handling of cc3 in kvm_handle_css_inst()
Consolidated the setting of the condition code in kvm_handle_css_inst().
For the (unhandled) instructions EQBS and SQBS, we have to return
an operation exception instead of cc3. Also removed the is_ioinst()
function to avoid decoding the opcode twice.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2013-07-30 16:12:23 +02:00
Peter Maydell
e67137c6c5 s390x: Rename 'dprintf' to 'DPRINTF'
'dprintf' is the name of a POSIX standard function so we should not be
stealing it for our debug macro. Rename to 'DPRINTF' (in line with
a number of other source files.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>
Acked-by: Richard Henderson <rth@twiddle.net>
Acked-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 1375100199-13934-3-git-send-email-peter.maydell@linaro.org
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-29 19:33:54 -05:00