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hyperv/vmbus: add a new method to get vcpu_id

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vcpu_id is host's representation of guest CPU.
We get the mapping between vcpu_id and FreeBSD kernel's cpu id when VMBus
driver is loaded. Later, when a driver, like the coming pcib driver, talks
to the host and needs to refer to a guest CPU, the driver must use the
vcpu_id.

Reviewed by:	jhb, sephe
Approved by:	sephe (mentor)
MFC after:	1 week
Sponsored by:	Microsoft
Differential Revision:	https://reviews.freebsd.org/D8410
This commit is contained in:
Dexuan Cui 2016-11-16 09:02:17 +00:00
parent b2f831c009
commit c8b32f717d
2 changed files with 17 additions and 0 deletions
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11
sys/dev/hyperv/vmbus/vmbus.c
View File

@ -77,6 +77,8 @@ static int vmbus_child_pnpinfo_str(device_t, device_t,
static uint32_t vmbus_get_version_method(device_t, device_t);
static int vmbus_probe_guid_method(device_t, device_t,
const struct hyperv_guid *);
static uint32_t vmbus_get_vcpu_id_method(device_t bus,
device_t dev, int cpu);
static int vmbus_init(struct vmbus_softc *);
static int vmbus_connect(struct vmbus_softc *, uint32_t);
@ -135,6 +137,7 @@ static device_method_t vmbus_methods[] = {
/* Vmbus interface */
DEVMETHOD(vmbus_get_version, vmbus_get_version_method),
DEVMETHOD(vmbus_probe_guid, vmbus_probe_guid_method),
DEVMETHOD(vmbus_get_vcpu_id, vmbus_get_vcpu_id_method),
DEVMETHOD_END
};
@ -991,6 +994,14 @@ vmbus_probe_guid_method(device_t bus, device_t dev,
return ENXIO;
}
static uint32_t
vmbus_get_vcpu_id_method(device_t bus, device_t dev, int cpu)
{
const struct vmbus_softc *sc = device_get_softc(bus);
return (VMBUS_PCPU_GET(sc, vcpuid, cpu));
}
static int
vmbus_probe(device_t dev)
{

6
sys/dev/hyperv/vmbus/vmbus_if.m
View File

@ -45,3 +45,9 @@ METHOD int probe_guid {
device_t dev;
const struct hyperv_guid *guid;
};
METHOD uint32_t get_vcpu_id {
device_t bus;
device_t dev;
int cpu;
};