From c9ddbac9c89110f77cb0fa07e634aaf1194899aa Mon Sep 17 00:00:00 2001 From: "Michael S. Tsirkin" Date: Tue, 14 Jul 2015 18:27:46 -0500 Subject: PCI: Restore PCI_MSIX_FLAGS_BIRMASK definition 09a2c73ddfc7 ("PCI: Remove unused PCI_MSIX_FLAGS_BIRMASK definition") removed PCI_MSIX_FLAGS_BIRMASK from an exported header because it was unused in the kernel. But that breaks user programs that were using it (QEMU in particular). Restore the PCI_MSIX_FLAGS_BIRMASK definition. [bhelgaas: changelog] Signed-off-by: Michael S. Tsirkin Signed-off-by: Bjorn Helgaas CC: stable@vger.kernel.org # v3.13+ --- include/uapi/linux/pci_regs.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/uapi/linux') diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h index efe3443572ba..413417f3707b 100644 --- a/include/uapi/linux/pci_regs.h +++ b/include/uapi/linux/pci_regs.h @@ -319,6 +319,7 @@ #define PCI_MSIX_PBA 8 /* Pending Bit Array offset */ #define PCI_MSIX_PBA_BIR 0x00000007 /* BAR index */ #define PCI_MSIX_PBA_OFFSET 0xfffffff8 /* Offset into specified BAR */ +#define PCI_MSIX_FLAGS_BIRMASK PCI_MSIX_PBA_BIR /* deprecated */ #define PCI_CAP_MSIX_SIZEOF 12 /* size of MSIX registers */ /* MSI-X Table entry format */ -- cgit v1.2.3 From 2ce7918990641b07e70e1b25752d666369e2016e Mon Sep 17 00:00:00 2001 From: Andrey Smetanin Date: Fri, 3 Jul 2015 15:01:41 +0300 Subject: kvm/x86: add sending hyper-v crash notification to user space Sending of notification is done by exiting vcpu to user space if KVM_REQ_HV_CRASH is enabled for vcpu. At exit to user space the kvm_run structure contains system_event with type KVM_SYSTEM_EVENT_CRASH to notify about guest crash occurred. Signed-off-by: Andrey Smetanin Signed-off-by: Denis V. Lunev Reviewed-by: Peter Hornyack CC: Paolo Bonzini CC: Gleb Natapov Signed-off-by: Paolo Bonzini --- Documentation/virtual/kvm/api.txt | 5 +++++ arch/x86/kvm/x86.c | 6 ++++++ include/linux/kvm_host.h | 1 + include/uapi/linux/kvm.h | 1 + 4 files changed, 13 insertions(+) (limited to 'include/uapi/linux') diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index a7926a90156f..a4ebcb712375 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -3277,6 +3277,7 @@ should put the acknowledged interrupt vector into the 'epr' field. struct { #define KVM_SYSTEM_EVENT_SHUTDOWN 1 #define KVM_SYSTEM_EVENT_RESET 2 +#define KVM_SYSTEM_EVENT_CRASH 3 __u32 type; __u64 flags; } system_event; @@ -3296,6 +3297,10 @@ Valid values for 'type' are: KVM_SYSTEM_EVENT_RESET -- the guest has requested a reset of the VM. As with SHUTDOWN, userspace can choose to ignore the request, or to schedule the reset to occur in the future and may call KVM_RUN again. + KVM_SYSTEM_EVENT_CRASH -- the guest crash occurred and the guest + has requested a crash condition maintenance. Userspace can choose + to ignore the request, or to gather VM memory core dump and/or + reset/shutdown of the VM. /* Fix the size of the union. */ char padding[256]; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index cfa3e5a7d6be..28076c266a9a 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -6263,6 +6263,12 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu) vcpu_scan_ioapic(vcpu); if (kvm_check_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu)) kvm_vcpu_reload_apic_access_page(vcpu); + if (kvm_check_request(KVM_REQ_HV_CRASH, vcpu)) { + vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT; + vcpu->run->system_event.type = KVM_SYSTEM_EVENT_CRASH; + r = 0; + goto out; + } } if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 1d917d9b7f12..51103f0feb7e 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -139,6 +139,7 @@ static inline bool is_error_page(struct page *page) #define KVM_REQ_DISABLE_IBS 24 #define KVM_REQ_APIC_PAGE_RELOAD 25 #define KVM_REQ_SMI 26 +#define KVM_REQ_HV_CRASH 27 #define KVM_USERSPACE_IRQ_SOURCE_ID 0 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1 diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 716ad4ae4d4b..9ef19ebd9df4 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -317,6 +317,7 @@ struct kvm_run { struct { #define KVM_SYSTEM_EVENT_SHUTDOWN 1 #define KVM_SYSTEM_EVENT_RESET 2 +#define KVM_SYSTEM_EVENT_CRASH 3 __u32 type; __u64 flags; } system_event; -- cgit v1.2.3 From 45c6df4471edf5404463756df1014fe7e36db3d3 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 23 Jun 2015 19:09:59 +0200 Subject: tty: linux/gsmmux.h needs linux/types.h We use __u8 in linux/gsmmux.h, so include linux/types.h to have that defined. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- include/uapi/linux/gsmmux.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/uapi/linux') diff --git a/include/uapi/linux/gsmmux.h b/include/uapi/linux/gsmmux.h index c06742d52856..ab055d8cddef 100644 --- a/include/uapi/linux/gsmmux.h +++ b/include/uapi/linux/gsmmux.h @@ -3,6 +3,7 @@ #include #include +#include struct gsm_config { -- cgit v1.2.3 From 45ac1403f564f411c6a383a2448688ba8dd705a4 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Tue, 21 Jul 2015 12:44:02 +0300 Subject: perf: Add PERF_RECORD_SWITCH to indicate context switches There are already two events for context switches, namely the tracepoint sched:sched_switch and the software event context_switches. Unfortunately neither are suitable for use by non-privileged users for the purpose of synchronizing hardware trace data (e.g. Intel PT) to the context switch. Tracepoints are no good at all for non-privileged users because they need either CAP_SYS_ADMIN or /proc/sys/kernel/perf_event_paranoid <= -1. On the other hand, kernel software events need either CAP_SYS_ADMIN or /proc/sys/kernel/perf_event_paranoid <= 1. Now many distributions do default perf_event_paranoid to 1 making context_switches a contender, except it has another problem (which is also shared with sched:sched_switch) which is that it happens before perf schedules events out instead of after perf schedules events in. Whereas a privileged user can see all the events anyway, a non-privileged user only sees events for their own processes, in other words they see when their process was scheduled out not when it was scheduled in. That presents two problems to use the event: 1. the information comes too late, so tools have to look ahead in the event stream to find out what the current state is 2. if they are unlucky tracing might have stopped before the context-switches event is recorded. This new PERF_RECORD_SWITCH event does not have those problems and it also has a couple of other small advantages. It is easier to use because it is an auxiliary event (like mmap, comm and task events) which can be enabled by setting a single bit. It is smaller than sched:sched_switch and easier to parse. To make the event useful for privileged users also, if the context is cpu-wide then the event record will be PERF_RECORD_SWITCH_CPU_WIDE which is the same as PERF_RECORD_SWITCH except it also provides the next or previous pid/tid. Signed-off-by: Adrian Hunter Acked-by: Peter Zijlstra (Intel) Tested-by: Jiri Olsa Cc: Andi Kleen Cc: Mathieu Poirier Cc: Pawel Moll Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1437471846-26995-2-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- include/uapi/linux/perf_event.h | 31 +++++++++++- kernel/events/core.c | 103 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 133 insertions(+), 1 deletion(-) (limited to 'include/uapi/linux') diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h index d97f84c080da..022d0acf7df0 100644 --- a/include/uapi/linux/perf_event.h +++ b/include/uapi/linux/perf_event.h @@ -330,7 +330,8 @@ struct perf_event_attr { mmap2 : 1, /* include mmap with inode data */ comm_exec : 1, /* flag comm events that are due to an exec */ use_clockid : 1, /* use @clockid for time fields */ - __reserved_1 : 38; + context_switch : 1, /* context switch data */ + __reserved_1 : 37; union { __u32 wakeup_events; /* wakeup every n events */ @@ -572,9 +573,11 @@ struct perf_event_mmap_page { /* * PERF_RECORD_MISC_MMAP_DATA and PERF_RECORD_MISC_COMM_EXEC are used on * different events so can reuse the same bit position. + * Ditto PERF_RECORD_MISC_SWITCH_OUT. */ #define PERF_RECORD_MISC_MMAP_DATA (1 << 13) #define PERF_RECORD_MISC_COMM_EXEC (1 << 13) +#define PERF_RECORD_MISC_SWITCH_OUT (1 << 13) /* * Indicates that the content of PERF_SAMPLE_IP points to * the actual instruction that triggered the event. See also @@ -818,6 +821,32 @@ enum perf_event_type { */ PERF_RECORD_LOST_SAMPLES = 13, + /* + * Records a context switch in or out (flagged by + * PERF_RECORD_MISC_SWITCH_OUT). See also + * PERF_RECORD_SWITCH_CPU_WIDE. + * + * struct { + * struct perf_event_header header; + * struct sample_id sample_id; + * }; + */ + PERF_RECORD_SWITCH = 14, + + /* + * CPU-wide version of PERF_RECORD_SWITCH with next_prev_pid and + * next_prev_tid that are the next (switching out) or previous + * (switching in) pid/tid. + * + * struct { + * struct perf_event_header header; + * u32 next_prev_pid; + * u32 next_prev_tid; + * struct sample_id sample_id; + * }; + */ + PERF_RECORD_SWITCH_CPU_WIDE = 15, + PERF_RECORD_MAX, /* non-ABI */ }; diff --git a/kernel/events/core.c b/kernel/events/core.c index d3dae3419b99..ce21143c0d9e 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -163,6 +163,7 @@ static atomic_t nr_mmap_events __read_mostly; static atomic_t nr_comm_events __read_mostly; static atomic_t nr_task_events __read_mostly; static atomic_t nr_freq_events __read_mostly; +static atomic_t nr_switch_events __read_mostly; static LIST_HEAD(pmus); static DEFINE_MUTEX(pmus_lock); @@ -2619,6 +2620,9 @@ static void perf_pmu_sched_task(struct task_struct *prev, local_irq_restore(flags); } +static void perf_event_switch(struct task_struct *task, + struct task_struct *next_prev, bool sched_in); + #define for_each_task_context_nr(ctxn) \ for ((ctxn) = 0; (ctxn) < perf_nr_task_contexts; (ctxn)++) @@ -2641,6 +2645,9 @@ void __perf_event_task_sched_out(struct task_struct *task, if (__this_cpu_read(perf_sched_cb_usages)) perf_pmu_sched_task(task, next, false); + if (atomic_read(&nr_switch_events)) + perf_event_switch(task, next, false); + for_each_task_context_nr(ctxn) perf_event_context_sched_out(task, ctxn, next); @@ -2831,6 +2838,9 @@ void __perf_event_task_sched_in(struct task_struct *prev, if (atomic_read(this_cpu_ptr(&perf_cgroup_events))) perf_cgroup_sched_in(prev, task); + if (atomic_read(&nr_switch_events)) + perf_event_switch(task, prev, true); + if (__this_cpu_read(perf_sched_cb_usages)) perf_pmu_sched_task(prev, task, true); } @@ -3454,6 +3464,10 @@ static void unaccount_event(struct perf_event *event) atomic_dec(&nr_task_events); if (event->attr.freq) atomic_dec(&nr_freq_events); + if (event->attr.context_switch) { + static_key_slow_dec_deferred(&perf_sched_events); + atomic_dec(&nr_switch_events); + } if (is_cgroup_event(event)) static_key_slow_dec_deferred(&perf_sched_events); if (has_branch_stack(event)) @@ -5981,6 +5995,91 @@ void perf_log_lost_samples(struct perf_event *event, u64 lost) perf_output_end(&handle); } +/* + * context_switch tracking + */ + +struct perf_switch_event { + struct task_struct *task; + struct task_struct *next_prev; + + struct { + struct perf_event_header header; + u32 next_prev_pid; + u32 next_prev_tid; + } event_id; +}; + +static int perf_event_switch_match(struct perf_event *event) +{ + return event->attr.context_switch; +} + +static void perf_event_switch_output(struct perf_event *event, void *data) +{ + struct perf_switch_event *se = data; + struct perf_output_handle handle; + struct perf_sample_data sample; + int ret; + + if (!perf_event_switch_match(event)) + return; + + /* Only CPU-wide events are allowed to see next/prev pid/tid */ + if (event->ctx->task) { + se->event_id.header.type = PERF_RECORD_SWITCH; + se->event_id.header.size = sizeof(se->event_id.header); + } else { + se->event_id.header.type = PERF_RECORD_SWITCH_CPU_WIDE; + se->event_id.header.size = sizeof(se->event_id); + se->event_id.next_prev_pid = + perf_event_pid(event, se->next_prev); + se->event_id.next_prev_tid = + perf_event_tid(event, se->next_prev); + } + + perf_event_header__init_id(&se->event_id.header, &sample, event); + + ret = perf_output_begin(&handle, event, se->event_id.header.size); + if (ret) + return; + + if (event->ctx->task) + perf_output_put(&handle, se->event_id.header); + else + perf_output_put(&handle, se->event_id); + + perf_event__output_id_sample(event, &handle, &sample); + + perf_output_end(&handle); +} + +static void perf_event_switch(struct task_struct *task, + struct task_struct *next_prev, bool sched_in) +{ + struct perf_switch_event switch_event; + + /* N.B. caller checks nr_switch_events != 0 */ + + switch_event = (struct perf_switch_event){ + .task = task, + .next_prev = next_prev, + .event_id = { + .header = { + /* .type */ + .misc = sched_in ? 0 : PERF_RECORD_MISC_SWITCH_OUT, + /* .size */ + }, + /* .next_prev_pid */ + /* .next_prev_tid */ + }, + }; + + perf_event_aux(perf_event_switch_output, + &switch_event, + NULL); +} + /* * IRQ throttle logging */ @@ -7479,6 +7578,10 @@ static void account_event(struct perf_event *event) if (atomic_inc_return(&nr_freq_events) == 1) tick_nohz_full_kick_all(); } + if (event->attr.context_switch) { + atomic_inc(&nr_switch_events); + static_key_slow_inc(&perf_sched_events.key); + } if (has_branch_stack(event)) static_key_slow_inc(&perf_sched_events.key); if (is_cgroup_event(event)) -- cgit v1.2.3 From a37281b63681015b12c3b7322e6bd681c0ea1ef4 Mon Sep 17 00:00:00 2001 From: David Hildenbrand Date: Fri, 21 Nov 2014 13:45:08 +0100 Subject: KVM: s390: more irq names for trace events This patch adds names for missing irq types to the trace events. In order to identify adapter irqs, the define is moved from interrupt.c to the other basic irq defines in uapi/linux/kvm.h. Acked-by: Cornelia Huck Signed-off-by: David Hildenbrand Signed-off-by: Christian Borntraeger --- arch/s390/kvm/interrupt.c | 3 +-- arch/s390/kvm/trace-s390.h | 22 ++++++++++++++++------ include/uapi/linux/kvm.h | 1 + 3 files changed, 18 insertions(+), 8 deletions(-) (limited to 'include/uapi/linux') diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index 6c98fb61d154..a5781404b83f 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -30,7 +30,6 @@ #define IOINT_SCHID_MASK 0x0000ffff #define IOINT_SSID_MASK 0x00030000 #define IOINT_CSSID_MASK 0x03fc0000 -#define IOINT_AI_MASK 0x04000000 #define PFAULT_INIT 0x0600 #define PFAULT_DONE 0x0680 #define VIRTIO_PARAM 0x0d00 @@ -1447,7 +1446,7 @@ int kvm_s390_inject_vm(struct kvm *kvm, inti->mchk.mcic = s390int->parm64; break; case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: - if (inti->type & IOINT_AI_MASK) + if (inti->type & KVM_S390_INT_IO_AI_MASK) VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)"); else VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x", diff --git a/arch/s390/kvm/trace-s390.h b/arch/s390/kvm/trace-s390.h index 4f373c50c264..cc1d6c68356f 100644 --- a/arch/s390/kvm/trace-s390.h +++ b/arch/s390/kvm/trace-s390.h @@ -105,11 +105,22 @@ TRACE_EVENT(kvm_s390_vcpu_start_stop, {KVM_S390_PROGRAM_INT, "program interrupt"}, \ {KVM_S390_SIGP_SET_PREFIX, "sigp set prefix"}, \ {KVM_S390_RESTART, "sigp restart"}, \ + {KVM_S390_INT_PFAULT_INIT, "pfault init"}, \ + {KVM_S390_INT_PFAULT_DONE, "pfault done"}, \ + {KVM_S390_MCHK, "machine check"}, \ + {KVM_S390_INT_CLOCK_COMP, "clock comparator"}, \ + {KVM_S390_INT_CPU_TIMER, "cpu timer"}, \ {KVM_S390_INT_VIRTIO, "virtio interrupt"}, \ {KVM_S390_INT_SERVICE, "sclp interrupt"}, \ {KVM_S390_INT_EMERGENCY, "sigp emergency"}, \ {KVM_S390_INT_EXTERNAL_CALL, "sigp ext call"} +#define get_irq_name(__type) \ + (__type > KVM_S390_INT_IO_MAX ? \ + __print_symbolic(__type, kvm_s390_int_type) : \ + (__type & KVM_S390_INT_IO_AI_MASK ? \ + "adapter I/O interrupt" : "subchannel I/O interrupt")) + TRACE_EVENT(kvm_s390_inject_vm, TP_PROTO(__u64 type, __u32 parm, __u64 parm64, int who), TP_ARGS(type, parm, parm64, who), @@ -131,8 +142,7 @@ TRACE_EVENT(kvm_s390_inject_vm, TP_printk("inject%s: type:%x (%s) parm:%x parm64:%llx", (__entry->who == 1) ? " (from kernel)" : (__entry->who == 2) ? " (from user)" : "", - __entry->inttype, - __print_symbolic(__entry->inttype, kvm_s390_int_type), + __entry->inttype, get_irq_name(__entry->inttype), __entry->parm, __entry->parm64) ); @@ -156,8 +166,8 @@ TRACE_EVENT(kvm_s390_inject_vcpu, TP_printk("inject (vcpu %d): type:%x (%s) parm:%x parm64:%llx", __entry->id, __entry->inttype, - __print_symbolic(__entry->inttype, kvm_s390_int_type), - __entry->parm, __entry->parm64) + get_irq_name(__entry->inttype), __entry->parm, + __entry->parm64) ); /* @@ -184,8 +194,8 @@ TRACE_EVENT(kvm_s390_deliver_interrupt, TP_printk("deliver interrupt (vcpu %d): type:%x (%s) " \ "data:%08llx %016llx", __entry->id, __entry->inttype, - __print_symbolic(__entry->inttype, kvm_s390_int_type), - __entry->data0, __entry->data1) + get_irq_name(__entry->inttype), __entry->data0, + __entry->data1) ); /* diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 9ef19ebd9df4..0d831f94f8a8 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -482,6 +482,7 @@ struct kvm_s390_psw { ((ai) << 26)) #define KVM_S390_INT_IO_MIN 0x00000000u #define KVM_S390_INT_IO_MAX 0xfffdffffu +#define KVM_S390_INT_IO_AI_MASK 0x04000000u struct kvm_s390_interrupt { -- cgit v1.2.3 From 8486a0bba6fc13ae60a8e402cf77c60a7d4e7a04 Mon Sep 17 00:00:00 2001 From: Macpaul Lin Date: Thu, 9 Jul 2015 15:18:38 +0800 Subject: usb: add usb_otg20_descriptor for OTG 2.0 and above OTG 2.0 introduces bcdOTG in otg descriptor to identify the OTG and EH supplement release number with which the OTG device is compliant, this patch adds structure usb_otg20_descriptor for OTG 2.0 and above. Signed-off-by: Macpaul Lin Signed-off-by: Li Jun Reviewed-by: Roger Quadros Signed-off-by: Felipe Balbi --- include/uapi/linux/usb/ch9.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include/uapi/linux') diff --git a/include/uapi/linux/usb/ch9.h b/include/uapi/linux/usb/ch9.h index aa33fd1b2d4f..aec689941c18 100644 --- a/include/uapi/linux/usb/ch9.h +++ b/include/uapi/linux/usb/ch9.h @@ -674,6 +674,17 @@ struct usb_otg_descriptor { __u8 bmAttributes; /* support for HNP, SRP, etc */ } __attribute__ ((packed)); +/* USB_DT_OTG (from OTG 2.0 supplement) */ +struct usb_otg20_descriptor { + __u8 bLength; + __u8 bDescriptorType; + + __u8 bmAttributes; /* support for HNP, SRP and ADP, etc */ + __le16 bcdOTG; /* OTG and EH supplement release number + * in binary-coded decimal(i.e. 2.0 is 0200H) + */ +} __attribute__ ((packed)); + /* from usb_otg_descriptor.bmAttributes */ #define USB_OTG_SRP (1 << 0) #define USB_OTG_HNP (1 << 1) /* swap host/device roles */ -- cgit v1.2.3 From 5d701cef9b40188c11c39be3a401bc4feeb154b8 Mon Sep 17 00:00:00 2001 From: Macpaul Lin Date: Thu, 9 Jul 2015 15:18:39 +0800 Subject: usb: add USB_OTG_ADP definition Add USB_OTG_ADP definition for usb_otg_descriptor.bmAttributes. Signed-off-by: Macpaul Lin Signed-off-by: Li Jun Acked-by: Peter Chen Signed-off-by: Felipe Balbi --- include/uapi/linux/usb/ch9.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/uapi/linux') diff --git a/include/uapi/linux/usb/ch9.h b/include/uapi/linux/usb/ch9.h index aec689941c18..f7adc6e01f9e 100644 --- a/include/uapi/linux/usb/ch9.h +++ b/include/uapi/linux/usb/ch9.h @@ -688,6 +688,7 @@ struct usb_otg20_descriptor { /* from usb_otg_descriptor.bmAttributes */ #define USB_OTG_SRP (1 << 0) #define USB_OTG_HNP (1 << 1) /* swap host/device roles */ +#define USB_OTG_ADP (1 << 2) /* support ADP */ /*-------------------------------------------------------------------------*/ -- cgit v1.2.3 From 3c7c8468e5d993dfe377a67e41cbb23cda93af9e Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Sun, 26 Jul 2015 09:54:20 +0300 Subject: mei: add async event notification ioctls Add ioctl IOCTL_MEI_NOTIFY_SET for enabling and disabling async event notification. Add ioctl IOCTL_MEI_NOTIFY_GET for receiving and acking an event notification. Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Signed-off-by: Greg Kroah-Hartman --- Documentation/ioctl/ioctl-number.txt | 2 + Documentation/misc-devices/mei/mei.txt | 45 ++++++++++++++++++++++- drivers/misc/mei/main.c | 67 ++++++++++++++++++++++++++++++++++ include/uapi/linux/mei.h | 19 ++++++++++ 4 files changed, 132 insertions(+), 1 deletion(-) (limited to 'include/uapi/linux') diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt index 611c52267d24..141f847c7648 100644 --- a/Documentation/ioctl/ioctl-number.txt +++ b/Documentation/ioctl/ioctl-number.txt @@ -124,6 +124,8 @@ Code Seq#(hex) Include File Comments 'H' 00-7F linux/hiddev.h conflict! 'H' 00-0F linux/hidraw.h conflict! 'H' 01 linux/mei.h conflict! +'H' 02 linux/mei.h conflict! +'H' 03 linux/mei.h conflict! 'H' 00-0F sound/asound.h conflict! 'H' 20-40 sound/asound_fm.h conflict! 'H' 80-8F sound/sfnt_info.h conflict! diff --git a/Documentation/misc-devices/mei/mei.txt b/Documentation/misc-devices/mei/mei.txt index 8d47501bba0a..91c1fa34f48b 100644 --- a/Documentation/misc-devices/mei/mei.txt +++ b/Documentation/misc-devices/mei/mei.txt @@ -96,7 +96,7 @@ A code snippet for an application communicating with Intel AMTHI client: IOCTL ===== -The Intel MEI Driver supports the following IOCTL command: +The Intel MEI Driver supports the following IOCTL commands: IOCTL_MEI_CONNECT_CLIENT Connect to firmware Feature (client). usage: @@ -125,6 +125,49 @@ The Intel MEI Driver supports the following IOCTL command: data that can be sent or received. (e.g. if MTU=2K, can send requests up to bytes 2k and received responses up to 2k bytes). + IOCTL_MEI_NOTIFY_SET: enable or disable event notifications + + Usage: + uint32_t enable; + ioctl(fd, IOCTL_MEI_NOTIFY_SET, &enable); + + Inputs: + uint32_t enable = 1; + or + uint32_t enable[disable] = 0; + + Error returns: + EINVAL Wrong IOCTL Number + ENODEV Device is not initialized or the client not connected + ENOMEM Unable to allocate memory to client internal data. + EFAULT Fatal Error (e.g. Unable to access user input data) + EOPNOTSUPP if the device doesn't support the feature + + Notes: + The client must be connected in order to enable notification events + + + IOCTL_MEI_NOTIFY_GET : retrieve event + + Usage: + uint32_t event; + ioctl(fd, IOCTL_MEI_NOTIFY_GET, &event); + + Outputs: + 1 - if an event is pending + 0 - if there is no even pending + + Error returns: + EINVAL Wrong IOCTL Number + ENODEV Device is not initialized or the client not connected + ENOMEM Unable to allocate memory to client internal data. + EFAULT Fatal Error (e.g. Unable to access user input data) + EOPNOTSUPP if the device doesn't support the feature + + Notes: + The client must be connected and event notification has to be enabled + in order to receive an event + Intel ME Applications ===================== diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index e9513d651cd3..ffa70035af29 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -445,6 +445,45 @@ end: return rets; } +/** + * mei_ioctl_client_notify_request - + * propagate event notification request to client + * + * @file: pointer to file structure + * @request: 0 - disable, 1 - enable + * + * Return: 0 on success , <0 on error + */ +static int mei_ioctl_client_notify_request(struct file *file, u32 request) +{ + struct mei_cl *cl = file->private_data; + + return mei_cl_notify_request(cl, file, request); +} + +/** + * mei_ioctl_client_notify_get - wait for notification request + * + * @file: pointer to file structure + * @notify_get: 0 - disable, 1 - enable + * + * Return: 0 on success , <0 on error + */ +static int mei_ioctl_client_notify_get(struct file *file, u32 *notify_get) +{ + struct mei_cl *cl = file->private_data; + bool notify_ev; + bool block = (file->f_flags & O_NONBLOCK) == 0; + int rets; + + rets = mei_cl_notify_get(cl, block, ¬ify_ev); + if (rets) + return rets; + + *notify_get = notify_ev ? 1 : 0; + return 0; +} + /** * mei_ioctl - the IOCTL function * @@ -459,6 +498,7 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data) struct mei_device *dev; struct mei_cl *cl = file->private_data; struct mei_connect_client_data connect_data; + u32 notify_get, notify_req; int rets; @@ -499,6 +539,33 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data) break; + case IOCTL_MEI_NOTIFY_SET: + dev_dbg(dev->dev, ": IOCTL_MEI_NOTIFY_SET.\n"); + if (copy_from_user(¬ify_req, + (char __user *)data, sizeof(notify_req))) { + dev_dbg(dev->dev, "failed to copy data from userland\n"); + rets = -EFAULT; + goto out; + } + rets = mei_ioctl_client_notify_request(file, notify_req); + break; + + case IOCTL_MEI_NOTIFY_GET: + dev_dbg(dev->dev, ": IOCTL_MEI_NOTIFY_GET.\n"); + rets = mei_ioctl_client_notify_get(file, ¬ify_get); + if (rets) + goto out; + + dev_dbg(dev->dev, "copy connect data to user\n"); + if (copy_to_user((char __user *)data, + ¬ify_get, sizeof(notify_get))) { + dev_dbg(dev->dev, "failed to copy data to userland\n"); + rets = -EFAULT; + goto out; + + } + break; + default: dev_err(dev->dev, ": unsupported ioctl %d.\n", cmd); rets = -ENOIOCTLCMD; diff --git a/include/uapi/linux/mei.h b/include/uapi/linux/mei.h index bc0d8b69c49e..7c3b64f6a215 100644 --- a/include/uapi/linux/mei.h +++ b/include/uapi/linux/mei.h @@ -107,4 +107,23 @@ struct mei_connect_client_data { }; }; +/** + * DOC: set and unset event notification for a connected client + * + * The IOCTL argument is 1 for enabling event notification and 0 for + * disabling the service + * Return: -EOPNOTSUPP if the devices doesn't support the feature + */ +#define IOCTL_MEI_NOTIFY_SET _IOW('H', 0x02, __u32) + +/** + * DOC: retrieve notification + * + * The IOCTL output argument is 1 if an event was is pending and 0 otherwise + * the ioctl has to be called in order to acknowledge pending event + * + * Return: -EOPNOTSUPP if the devices doesn't support the feature + */ +#define IOCTL_MEI_NOTIFY_GET _IOR('H', 0x03, __u32) + #endif /* _LINUX_MEI_H */ -- cgit v1.2.3 From 71ef3c6b9d4665ee7afbbe4c208a98917dcfc32f Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Sun, 10 May 2015 12:22:42 -0700 Subject: perf: Add cycles to branch_info Intel Skylake supports reporting the time in cycles a branch in the LBR took, to give a rough indication of the basic block performance. Export the cycle information in the branch_info structure. This can be done by just reusing some currently zero padding. This is just the generic header change. The architecture still needs to fill it in. There's no attempt to convert to real time, as we really want cycles here. Signed-off-by: Andi Kleen Signed-off-by: Peter Zijlstra (Intel) Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: eranian@google.com Link: http://lkml.kernel.org/r/1431285767-27027-5-git-send-email-andi@firstfloor.org Signed-off-by: Ingo Molnar --- include/uapi/linux/perf_event.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'include/uapi/linux') diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h index 022d0acf7df0..2881145cda86 100644 --- a/include/uapi/linux/perf_event.h +++ b/include/uapi/linux/perf_event.h @@ -951,6 +951,7 @@ union perf_mem_data_src { * * in_tx: running in a hardware transaction * abort: aborting a hardware transaction + * cycles: cycles from last branch (or 0 if not supported) */ struct perf_branch_entry { __u64 from; @@ -959,7 +960,8 @@ struct perf_branch_entry { predicted:1,/* target predicted */ in_tx:1, /* in transaction */ abort:1, /* transaction abort */ - reserved:60; + cycles:16, /* cycle count to last branch */ + reserved:44; }; #endif /* _UAPI_LINUX_PERF_EVENT_H */ -- cgit v1.2.3