- 10 6月, 2014 5 次提交
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由 Cornelia Huck 提交于
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: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 Cornelia Huck 提交于
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: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 Thomas Huth 提交于
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: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NJens Freimann <jfrei@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 Thomas Huth 提交于
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: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NJens Freimann <jfrei@linux.vnet.ibm.com> Reviewed-by: NDavid Hildenbrand <dahi@linux.vnet.ibm.com> Acked-by: NChristian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 Dominik Dingel 提交于
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: NDominik Dingel <dingel@linux.vnet.ibm.com> Acked-by: NChristian Borntraeger <borntraeger@de.ibm.com> Acked-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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- 20 5月, 2014 4 次提交
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由 David Hildenbrand 提交于
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: NDavid Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: NJens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 David Hildenbrand 提交于
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: NDavid Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: NJens Freimann <jfrei@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 David Hildenbrand 提交于
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: NDavid Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NJens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 Cornelia Huck 提交于
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: NThomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: NChristian Borntraeger <borntraeger@de.ibm.com> Acked-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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- 13 5月, 2014 2 次提交
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由 Paolo Bonzini 提交于
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: NGleb Natapov <gnatapov@redhat.com> Reviewed-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Cornelia Huck 提交于
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: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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- 30 4月, 2014 1 次提交
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由 Cornelia Huck 提交于
Make kvm_s390_enable_css_support() use new interface. Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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- 25 4月, 2014 3 次提交
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由 Christian Borntraeger 提交于
We also need to sync guest breaking event address and program parameter register for migration support. Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 Christian Borntraeger 提交于
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: NChristian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 David Hildenbrand 提交于
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: NDavid Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: NJens Freimann <jfrei@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Cc: qemu-stable@nongnu.org Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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- 05 3月, 2014 1 次提交
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由 Cornelia Huck 提交于
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: NChristian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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- 27 2月, 2014 9 次提交
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由 Frank Blaschka 提交于
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: NFrank Blaschka <blaschka@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: NChristian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Thomas Huth 提交于
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: 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
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: NChristian Borntraeger <borntraeger@de.ibm.com> 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
In the SCLP handler function, the condition code register must only be set if no exception occured. 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
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: 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 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: 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
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: 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 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: 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 Dominik Dingel 提交于
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: NDominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: NJens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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- 31 1月, 2014 1 次提交
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由 Dominik Dingel 提交于
The partial register handling (introduced with commits 420840e5 and 3474b679 ) 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: NDominik Dingel <dingel@linux.vnet.ibm.com> CC: Jason J. Herne <jjherne@us.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com> Acked-by: NAlexander Graf <agraf@suse.de>
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- 18 12月, 2013 7 次提交
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由 Thomas Huth 提交于
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: NThomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NJens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Thomas Huth 提交于
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: NThomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NJens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Thomas Huth 提交于
This patch adds the missing START order to the SIGP instruction handler. Signed-off-by: NThomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NJens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Thomas Huth 提交于
To make scripts/checkpatch.pl happy for the following patches, the coding style in handle_sigp() has to be fixed first. Signed-off-by: NThomas Huth <thuth@linux.vnet.ibm.com> Acked-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NJens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Thomas Huth 提交于
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: NThomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NJens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Thomas Huth 提交于
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: NThomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NJens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Cornelia Huck 提交于
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: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NJens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: NAlexander Graf <agraf@suse.de>
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- 14 10月, 2013 1 次提交
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由 Stefan Weil 提交于
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: NStefan Weil <sw@weilnetz.de> Reviewed-by: NMarkus Armbruster <armbru@redhat.com> Message-id: 1380481005-32399-1-git-send-email-sw@weilnetz.de Signed-off-by: NAnthony Liguori <aliguori@amazon.com>
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- 20 9月, 2013 3 次提交
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由 Thomas Huth 提交于
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: 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
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: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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由 Thomas Huth 提交于
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: NThomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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- 13 9月, 2013 2 次提交
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由 Markus Armbruster 提交于
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: NChristian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Reviewed-by: NAndreas Färber <afaerber@suse.de> Acked-by: NLaszlo Ersek <lersek@redhat.com> Acked-by: NStefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: NChristian Borntraeger <borntraeger@de.ibm.com> Message-id: 1375276272-15988-8-git-send-email-armbru@redhat.com Signed-off-by: NAnthony Liguori <anthony@codemonkey.ws>
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由 Markus Armbruster 提交于
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: NChristian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Acked-by: NLaszlo Ersek <lersek@redhat.com> Acked-by: NStefano Stabellini <stefano.stabellini@eu.citrix.com> Message-id: 1375276272-15988-5-git-send-email-armbru@redhat.com Signed-off-by: NAnthony Liguori <anthony@codemonkey.ws>
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- 30 8月, 2013 1 次提交
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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: NEugene (jno) Dvurechenski <jno@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com> Acked-by: NAlexander Graf <agraf@suse.de>
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