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From: Christian Borntraeger <borntraeger at de.ibm.com> The address 0x11b8 is used by z/VM for pfault and diag 250 I/O to provide a 64 bit extint parameter. virtio uses the same address, so its time to update the lowcore structure. Acked-by: Martin Schwidefsky <schwidefsky at de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger at de.ibm.com> Signed-off-by: Carsten Otte <cotte at de.ibm.com> --- include/asm-s390/lowcore.h | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 dele...

...e trivial intercept reasons are handled in this patch: handle_noop() just does nothing for intercepts that don't require our support at all handle_stop() is called when a cpu enters stopped state, and it drops out to userland after updating our vcpu state handle_validity() faults in the cpu lowcore if needed, or passes the request to userland Acked-by: Martin Schwidefsky <schwidefsky at de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger at de.ibm.com> Signed-off-by: Carsten Otte <cotte at de.ibm.com> --- arch/s390/kvm/Makefile | 2 - arch/s390/kvm/int...

...e trivial intercept reasons are handled in this patch: handle_noop() just does nothing for intercepts that don't require our support at all handle_stop() is called when a cpu enters stopped state, and it drops out to userland after updating our vcpu state handle_validity() faults in the cpu lowcore if needed, or passes the request to userland Acked-by: Martin Schwidefsky <schwidefsky at de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger at de.ibm.com> Signed-off-by: Carsten Otte <cotte at de.ibm.com> --- arch/s390/kvm/Makefile | 2 - arch/s390/kvm/int...

...ing the balloon. So in the qemu monitor using lets say "balloon 1000" will hang the guest. Seems to be a deadlock in the virtio-ccw code. We seem to call the config code in the interrupt handler. crash> bt PID: 0 TASK: d9a400 CPU: 0 COMMAND: "swapper/0" LOWCORE INFO: -psw : 0x0404c00180000000 0x0000000000116472 -function : smp_yield_cpu at 116472 -prefix : 0x7fffc000 -cpu timer: 0x7fffffcc8c0af5be -clock cmp: 0x720a4e4002831000 -general registers: 000000000000000000 000000000000000000 0x000000000000009c 0x0000000000fac2b0...

...requested: - sigp sense tries to retrieve information such as existence or running state of the remote cpu - sigp emergency sends an external interrupt to the remove cpu - sigp stop stops a remove cpu - sigp stop store status stops a remote cpu, and stores its entire internal state to the cpus lowcore - sigp set arch sets the architecture mode of the remote cpu. setting to ESAME (s390x 64bit) is accepted, setting to ESA/S390 (s390, 31 or 24 bit) is denied, all others are passed to userland - sigp set prefix sets the prefix register of a remote cpu For implementation of this, the stop inter...

...long +see also: include/linux/kvm.h +This ioctl stores the state of the cpu at the guest real address given as +argument, unless one of the following values defined in include/linux/kvm.h +is given as arguement: +KVM_S390_STORE_STATUS_NOADDR - the CPU stores its status to the save area in +absolute lowcore as defined by the principles of operation +KVM_S390_STORE_STATUS_PREFIXED - the CPU stores its status to the save area in +its prefix page just like the dump tool that comes with zipl. This is useful +to create a system dump for use with lkcdutils or crash. + +ioctl: KVM_S390_SET_INITIAL_PSW +arg...

...long +see also: include/linux/kvm.h +This ioctl stores the state of the cpu at the guest real address given as +argument, unless one of the following values defined in include/linux/kvm.h +is given as arguement: +KVM_S390_STORE_STATUS_NOADDR - the CPU stores its status to the save area in +absolute lowcore as defined by the principles of operation +KVM_S390_STORE_STATUS_PREFIXED - the CPU stores its status to the save area in +its prefix page just like the dump tool that comes with zipl. This is useful +to create a system dump for use with lkcdutils or crash. + +ioctl: KVM_S390_SET_INITIAL_PSW +arg...

...preparation: provide hook to enable pgstes in user pagetable [RFC/PATCH 02/15] preparation: host memory management changes for s390 kvm [RFC/PATCH 03/15] preparation: address of the 64bit extint parm in lowcore [RFC/PATCH 04/15] preparation: split sysinfo defintions for kvm use [RFC/PATCH 05/15] kvm-s390: s390 arch backend for the kvm kernel module [RFC/PATCH 06/15] kvm-s390: sie intercept handling [RFC/PATCH 07/15] kvm-s390: interrupt subsystem, cpu timer, waitpsw [RFC/PATCH 08/15] kvm-s390: intercepts...

...preparation: provide hook to enable pgstes in user pagetable [RFC/PATCH 02/15] preparation: host memory management changes for s390 kvm [RFC/PATCH 03/15] preparation: address of the 64bit extint parm in lowcore [RFC/PATCH 04/15] preparation: split sysinfo defintions for kvm use [RFC/PATCH 05/15] kvm-s390: s390 arch backend for the kvm kernel module [RFC/PATCH 06/15] kvm-s390: sie intercept handling [RFC/PATCH 07/15] kvm-s390: interrupt subsystem, cpu timer, waitpsw [RFC/PATCH 08/15] kvm-s390: intercepts...

...Corp. 2008 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License (version 2 only) + * as published by the Free Software Foundation. + * + * Author(s): Carsten Otte <cotte at de.ibm.com> + */ + +#include <asm/lowcore.h> +#include <asm/uaccess.h> +#include <linux/kvm_host.h> +#include "kvm-s390.h" +#include "gaccess.h" + +static int psw_extint_disabled(struct kvm_vcpu *vcpu) +{ + return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT); +} + +static int psw_interrupt...

Some vqs don't need to be allocated when the related feature bits are disabled. Callers notice the vq allocation layer by setting the related names[i] to be NULL. This patch series fixes the find_vqs implementations to handle this case. Wei Wang (2): virtio_pci: use queue idx instead of array idx to set up the vq virtio: don't allocate vqs when names[i] = NULL

Some vqs don't need to be allocated when the related feature bits are disabled. Callers notice the vq allocation layer by setting the related names[i] to be NULL. This patch series fixes the find_vqs implementations to handle this case. Wei Wang (2): virtio_pci: use queue idx instead of array idx to set up the vq virtio: don't allocate vqs when names[i] = NULL

.../s390/ drivers-$(CONFIG_MATHEMU) += arch/s390/math-emu/ Index: kvm/arch/s390/kernel/vtime.c =================================================================== --- kvm.orig/arch/s390/kernel/vtime.c +++ kvm/arch/s390/kernel/vtime.c @@ -110,6 +110,7 @@ void account_system_vtime(struct task_st S390_lowcore.steal_clock -= cputime << 12; account_system_time(tsk, 0, cputime); } +EXPORT_SYMBOL_GPL(account_system_vtime); static inline void set_vtimer(__u64 expires) { Index: kvm/arch/s390/kvm/Makefile =================================================================== --- /dev/null +++ kvm/ar...

.../s390/ drivers-$(CONFIG_MATHEMU) += arch/s390/math-emu/ Index: kvm/arch/s390/kernel/vtime.c =================================================================== --- kvm.orig/arch/s390/kernel/vtime.c +++ kvm/arch/s390/kernel/vtime.c @@ -110,6 +110,7 @@ void account_system_vtime(struct task_st S390_lowcore.steal_clock -= cputime << 12; account_system_time(tsk, 0, cputime); } +EXPORT_SYMBOL_GPL(account_system_vtime); static inline void set_vtimer(__u64 expires) { Index: kvm/arch/s390/kvm/Makefile =================================================================== --- /dev/null +++ kvm/ar...