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authorYi Min Zhao <zyimin@linux.vnet.ibm.com>2017-02-17 15:00:59 +0800
committerChristian Borntraeger <borntraeger@de.ibm.com>2017-07-14 12:29:47 +0200
commit1622ffd5151ad09c47785a380531ef1ebfc95be8 (patch)
tree03ec6c19ce9e9d272a4785acf44b811e7bed4d01 /hw
parent6c1dd652a606f4446cdb8883ac68d6fb54b02e5c (diff)
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s390x/flic: introduce inject_airq callback
Let's introduce a specialized way to inject adapter interrupts that, unlike the common interrupt injection method, allows to take the characteristics of the adapter into account. For adapters subject to AIS facility: - for non-kvm case, we handle the suppression for a given ISC in QEMU. - for kvm case, we pass adapter id to kvm to do airq injection. Add add tracepoint for suppressed airq and suppressing airq. Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com> Signed-off-by: Fei Li <sherrylf@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'hw')
-rw-r--r--hw/intc/s390_flic.c27
-rw-r--r--hw/intc/s390_flic_kvm.c18
-rw-r--r--hw/intc/trace-events4
3 files changed, 49 insertions, 0 deletions
diff --git a/hw/intc/s390_flic.c b/hw/intc/s390_flic.c
index ce7f355..efcb1dd 100644
--- a/hw/intc/s390_flic.c
+++ b/hw/intc/s390_flic.c
@@ -13,8 +13,11 @@
#include "qemu/osdep.h"
#include "qemu/error-report.h"
#include "hw/sysbus.h"
+#include "hw/s390x/ioinst.h"
#include "hw/s390x/s390_flic.h"
+#include "hw/s390x/css.h"
#include "trace.h"
+#include "cpu.h"
#include "hw/qdev.h"
#include "qapi/error.h"
#include "hw/s390x/s390-virtio-ccw.h"
@@ -100,6 +103,29 @@ static int qemu_s390_modify_ais_mode(S390FLICState *fs, uint8_t isc,
return 0;
}
+static int qemu_s390_inject_airq(S390FLICState *fs, uint8_t type,
+ uint8_t isc, uint8_t flags)
+{
+ QEMUS390FLICState *flic = QEMU_S390_FLIC(fs);
+ bool flag = flags & S390_ADAPTER_SUPPRESSIBLE;
+ uint32_t io_int_word = (isc << 27) | IO_INT_WORD_AI;
+
+ if (flag && (flic->nimm & AIS_MODE_MASK(isc))) {
+ trace_qemu_s390_airq_suppressed(type, isc);
+ return 0;
+ }
+
+ s390_io_interrupt(0, 0, 0, io_int_word);
+
+ if (flag && (flic->simm & AIS_MODE_MASK(isc))) {
+ flic->nimm |= AIS_MODE_MASK(isc);
+ trace_qemu_s390_suppress_airq(isc, "Single-Interruption Mode",
+ "NO-Interruptions Mode");
+ }
+
+ return 0;
+}
+
static void qemu_s390_flic_reset(DeviceState *dev)
{
QEMUS390FLICState *flic = QEMU_S390_FLIC(dev);
@@ -120,6 +146,7 @@ static void qemu_s390_flic_class_init(ObjectClass *oc, void *data)
fsc->release_adapter_routes = qemu_s390_release_adapter_routes;
fsc->clear_io_irq = qemu_s390_clear_io_flic;
fsc->modify_ais_mode = qemu_s390_modify_ais_mode;
+ fsc->inject_airq = qemu_s390_inject_airq;
}
static Property s390_flic_common_properties[] = {
diff --git a/hw/intc/s390_flic_kvm.c b/hw/intc/s390_flic_kvm.c
index 55aa35f..a587ace 100644
--- a/hw/intc/s390_flic_kvm.c
+++ b/hw/intc/s390_flic_kvm.c
@@ -170,6 +170,23 @@ static int kvm_s390_modify_ais_mode(S390FLICState *fs, uint8_t isc,
return ioctl(flic->fd, KVM_SET_DEVICE_ATTR, &attr) ? -errno : 0;
}
+static int kvm_s390_inject_airq(S390FLICState *fs, uint8_t type,
+ uint8_t isc, uint8_t flags)
+{
+ KVMS390FLICState *flic = KVM_S390_FLIC(fs);
+ uint32_t id = css_get_adapter_id(type, isc);
+ struct kvm_device_attr attr = {
+ .group = KVM_DEV_FLIC_AIRQ_INJECT,
+ .attr = id,
+ };
+
+ if (!fs->ais_supported) {
+ return -ENOSYS;
+ }
+
+ return ioctl(flic->fd, KVM_SET_DEVICE_ATTR, &attr) ? -errno : 0;
+}
+
/**
* __get_all_irqs - store all pending irqs in buffer
* @flic: pointer to flic device state
@@ -515,6 +532,7 @@ static void kvm_s390_flic_class_init(ObjectClass *oc, void *data)
fsc->release_adapter_routes = kvm_s390_release_adapter_routes;
fsc->clear_io_irq = kvm_s390_clear_io_flic;
fsc->modify_ais_mode = kvm_s390_modify_ais_mode;
+ fsc->inject_airq = kvm_s390_inject_airq;
}
static const TypeInfo kvm_s390_flic_info = {
diff --git a/hw/intc/trace-events b/hw/intc/trace-events
index 729c128..c586714 100644
--- a/hw/intc/trace-events
+++ b/hw/intc/trace-events
@@ -73,6 +73,10 @@ flic_create_device(int err) "flic: create device failed %d"
flic_no_device_api(int err) "flic: no Device Contral API support %d"
flic_reset_failed(int err) "flic: reset failed %d"
+# hw/intc/s390_flic.c
+qemu_s390_airq_suppressed(uint8_t type, uint8_t isc) "flic: adapter I/O interrupt suppressed (type %x isc %x)"
+qemu_s390_suppress_airq(uint8_t isc, const char *from, const char *to) "flic: for isc %x, suppress airq by modifying ais mode from %s to %s"
+
# hw/intc/aspeed_vic.c
aspeed_vic_set_irq(int irq, int level) "Enabling IRQ %d: %d"
aspeed_vic_update_fiq(int flags) "Raising FIQ: %d"