search for: vcpu_state

From: Carsten Otte <cotte at de.ibm.com> From: Christian Borntraeger <borntraeger at de.ibm.com> This patch introduces in-kernel handling of some intercepts for privileged instructions: handle_set_prefix() sets the prefix register of the local cpu handle_store_prefix() stores the content of the prefix register to memory handle_store_cpu_address() stores the cpu number of

From: Carsten Otte <cotte at de.ibm.com> This patch contains the s390 interrupt subsystem (similar to in kernel apic) including timer interrupts (similar to in-kernel-pit) and enabled wait (similar to in kernel hlt). In order to achieve that, this patch also introduces intercept handling for instruction intercepts, and it implements load control instructions. This patch introduces an

From: Carsten Otte <cotte at de.ibm.com> From: Christian Borntraeger <borntraeger at de.ibm.com> This patch introduces in-kernel handling of _some_ sigp interprocessor signals (similar to ipi). kvm_s390_handle_sigp() decodes the sigp instruction and calls individual handlers depending on the operation requested: - sigp sense tries to retrieve information such as existence or running

From: Carsten Otte <cotte at de.ibm.com> From: Christian Borntraeger <borntraeger at de.ibm.com> This path introduces handling of sie intercepts in three flavors: Intercepts are either handled completely in-kernel by kvm_handle_sie_intercept(), or passed to userspace with corresponding data in struct kvm_run in case kvm_handle_sie_intercept() returns -ENOTSUPP. In case of partial

From: Carsten Otte <cotte at de.ibm.com> From: Christian Borntraeger <borntraeger at de.ibm.com> This path introduces handling of sie intercepts in three flavors: Intercepts are either handled completely in-kernel by kvm_handle_sie_intercept(), or passed to userspace with corresponding data in struct kvm_run in case kvm_handle_sie_intercept() returns -ENOTSUPP. In case of partial

This patch series introduces a backend for kvm to run on IBM System z machines that uses the mainframe's sie virtualization capability. This work runs 64bit guests on z800/z890/z900/z990/z9/z10 class machines with a 64bit linux host. Userspace will follow once we're done brushing it over. The patch queue consists of the following patches, which can be applied in sequence on top of kvm.git

This patch series introduces a backend for kvm to run on IBM System z machines that uses the mainframe's sie virtualization capability. This work runs 64bit guests on z800/z890/z900/z990/z9/z10 class machines with a 64bit linux host. Userspace will follow once we're done brushing it over. The patch queue consists of the following patches, which can be applied in sequence on top of kvm.git

From: Carsten Otte <cotte at de.ibm.com> From: Christian Borntraeger <borntraeger at de.ibm.com> This patch introduces interpretation of some diagnose instruction intercepts. Diagnose is our classic architected way of doing a hypercall. This patch features the following diagnose codes: - vm storage size, that tells the guest about its memory layout - time slice end, which is used by

...* + * The vcpu_hashed is a special state that is set by the new lock holder on + * the new queue head to indicate that _Q_SLOW_VAL is set and hash entry + * filled. With this state, the queue head CPU will always be kicked even + * if it is not halted to avoid potential racing condition. + */ enum vcpu_state { vcpu_running = 0, vcpu_halted, + vcpu_hashed }; struct pv_node { @@ -97,7 +104,13 @@ static inline u32 hash_align(u32 hash) return hash & ~(PV_HB_PER_LINE - 1); } -static struct qspinlock **pv_hash(struct qspinlock *lock, struct pv_node *node) +/* + * Set up an entry in the lock...

...pv_kick(cpu) -- wakes a suspended vcpu + * + * Using these we implement __pv_queue_spin_lock_slowpath() and + * __pv_queue_spin_unlock() to replace native_queue_spin_lock_slowpath() and + * native_queue_spin_unlock(). + */ + +#define _Q_SLOW_VAL (2U << _Q_LOCKED_OFFSET) + +enum vcpu_state { + vcpu_running = 0, + vcpu_halted, +}; + +struct pv_node { + struct mcs_spinlock mcs; + struct mcs_spinlock __res[3]; + + int cpu; + u8 state; +}; + +/* + * Initialize the PV part of the mcs_spinlock node. + */ +static void pv_init_node(struct mcs_spinlock *node) +{ + struct pv_node *pn = (st...

...pv_kick(cpu) -- wakes a suspended vcpu + * + * Using these we implement __pv_queue_spin_lock_slowpath() and + * __pv_queue_spin_unlock() to replace native_queue_spin_lock_slowpath() and + * native_queue_spin_unlock(). + */ + +#define _Q_SLOW_VAL (2U << _Q_LOCKED_OFFSET) + +enum vcpu_state { + vcpu_running = 0, + vcpu_halted, +}; + +struct pv_node { + struct mcs_spinlock mcs; + struct mcs_spinlock __res[3]; + + int cpu; + u8 state; +}; + +/* + * Initialize the PV part of the mcs_spinlock node. + */ +static void pv_init_node(struct mcs_spinlock *node) +{ + struct pv_node *pn = (st...

...sing these we implement __pv_queue_spin_lock_slowpath() and >> + * __pv_queue_spin_unlock() to replace native_queue_spin_lock_slowpath() and >> + * native_queue_spin_unlock(). >> + */ >> + >> +#define _Q_SLOW_VAL (3U<< _Q_LOCKED_OFFSET) >> + >> +enum vcpu_state { >> + vcpu_running = 0, >> + vcpu_halted, >> +}; >> + >> +struct pv_node { >> + struct mcs_spinlock mcs; >> + struct mcs_spinlock __res[3]; >> + >> + int cpu; >> + u8 state; >> +}; >> + >> +/* >> + * Hash table...

...ded vcpu > + * > + * Using these we implement __pv_queue_spin_lock_slowpath() and > + * __pv_queue_spin_unlock() to replace native_queue_spin_lock_slowpath() and > + * native_queue_spin_unlock(). > + */ > + > +#define _Q_SLOW_VAL (3U << _Q_LOCKED_OFFSET) > + > +enum vcpu_state { > + vcpu_running = 0, > + vcpu_halted, > +}; > + > +struct pv_node { > + struct mcs_spinlock mcs; > + struct mcs_spinlock __res[3]; > + > + int cpu; > + u8 state; > +}; > + > +/* > + * Hash table using open addressing with an LFSR probe sequence. >...

...ded vcpu > + * > + * Using these we implement __pv_queue_spin_lock_slowpath() and > + * __pv_queue_spin_unlock() to replace native_queue_spin_lock_slowpath() and > + * native_queue_spin_unlock(). > + */ > + > +#define _Q_SLOW_VAL (3U << _Q_LOCKED_OFFSET) > + > +enum vcpu_state { > + vcpu_running = 0, > + vcpu_halted, > +}; > + > +struct pv_node { > + struct mcs_spinlock mcs; > + struct mcs_spinlock __res[3]; > + > + int cpu; > + u8 state; > +}; > + > +/* > + * Hash table using open addressing with an LFSR probe sequence. >...

...pv_kick(cpu) -- wakes a suspended vcpu + * + * Using these we implement __pv_queue_spin_lock_slowpath() and + * __pv_queue_spin_unlock() to replace native_queue_spin_lock_slowpath() and + * native_queue_spin_unlock(). + */ + +#define _Q_SLOW_VAL (3U << _Q_LOCKED_OFFSET) + +enum vcpu_state { + vcpu_running = 0, + vcpu_halted, +}; + +struct pv_node { + struct mcs_spinlock mcs; + struct mcs_spinlock __res[3]; + + int cpu; + u8 state; +}; + +/* + * Hash table using open addressing with an LFSR probe sequence. + * + * Since we should not be holding locks from NMI context (very rare i...

...pv_kick(cpu) -- wakes a suspended vcpu + * + * Using these we implement __pv_queue_spin_lock_slowpath() and + * __pv_queue_spin_unlock() to replace native_queue_spin_lock_slowpath() and + * native_queue_spin_unlock(). + */ + +#define _Q_SLOW_VAL (3U << _Q_LOCKED_OFFSET) + +enum vcpu_state { + vcpu_running = 0, + vcpu_halted, +}; + +struct pv_node { + struct mcs_spinlock mcs; + struct mcs_spinlock __res[3]; + + int cpu; + u8 state; +}; + +/* + * Lock and MCS node addresses hash table for fast lookup + * + * Hashing is done on a per-cacheline basis to minimize the need to access +...

From: Carsten Otte <cotte at de.ibm.com> From: Christian Borntraeger <borntraeger at de.ibm.com> From: Heiko Carstens <heiko.carstens at de.ibm.com> This patch contains the port of Qumranet's kvm kernel module to IBM zSeries (aka s390x, mainframe) architecture. It uses the mainframe's virtualization instruction SIE to run virtual machines with up to 64 virtual CPUs

From: Carsten Otte <cotte at de.ibm.com> From: Christian Borntraeger <borntraeger at de.ibm.com> From: Heiko Carstens <heiko.carstens at de.ibm.com> This patch contains the port of Qumranet's kvm kernel module to IBM zSeries (aka s390x, mainframe) architecture. It uses the mainframe's virtualization instruction SIE to run virtual machines with up to 64 virtual CPUs

...t8_t test_write_pattern; static int page_size; +struct vcpu_reply { + struct kvmi_msg_hdr hdr; + struct kvmi_vcpu_hdr vcpu_hdr; + struct kvmi_event_reply reply; +}; + struct vcpu_worker_data { struct kvm_vm *vm; int vcpu_id; @@ -550,7 +556,7 @@ static void *vcpu_worker(void *data) run = vcpu_state(ctx->vm, ctx->vcpu_id); - while (!ctx->stop) { + while (!READ_ONCE(ctx->stop)) { struct ucall uc; vcpu_run(ctx->vm, ctx->vcpu_id); @@ -589,7 +595,7 @@ static void wait_vcpu_worker(pthread_t vcpu_thread) static void stop_vcpu_worker(pthread_t vcpu_thread, struct...

...pv_kick(cpu) -- wakes a suspended vcpu + * + * Using these we implement __pv_queue_spin_lock_slowpath() and + * __pv_queue_spin_unlock() to replace native_queue_spin_lock_slowpath() and + * native_queue_spin_unlock(). + */ + +#define _Q_SLOW_VAL (3U << _Q_LOCKED_OFFSET) + +enum vcpu_state { + vcpu_running = 0, + vcpu_halted, +}; + +struct pv_node { + struct mcs_spinlock mcs; + struct mcs_spinlock __res[3]; + + int cpu; + u8 state; +}; + +/* + * Lock and MCS node addresses hash table for fast lookup + * + * Hashing is done on a per-cacheline basis to minimize the need to access +...