From: Jake Oshins <jakeo@xxxxxxxxxxxxx>
This patch exposes the function that hv_vmbus.ko uses to make hypercalls. This
is necessary for retargeting an interrupt when it is given a new affinity.
Since we are exporting this API, rename the API as it will be visible outside
the hv.c file.
Signed-off-by: Jake Oshins <jakeo@xxxxxxxxxxxxx>
Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
---
drivers/hv/hv.c | 9 +++++----
include/linux/hyperv.h | 1 +
2 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 6341be8..a7b6c6a 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -89,9 +89,9 @@ static int query_hypervisor_info(void)
}
/*
- * do_hypercall- Invoke the specified hypercall
+ * hv_do_hypercall- Invoke the specified hypercall
*/
-static u64 do_hypercall(u64 control, void *input, void *output)
+u64 hv_do_hypercall(u64 control, void *input, void *output)
{
u64 input_address = (input) ? virt_to_phys(input) : 0;
u64 output_address = (output) ? virt_to_phys(output) : 0;
@@ -132,6 +132,7 @@ static u64 do_hypercall(u64 control, void *input, void *output)
return hv_status_lo | ((u64)hv_status_hi << 32);
#endif /* !x86_64 */
}
+EXPORT_SYMBOL_GPL(hv_do_hypercall);
#ifdef CONFIG_X86_64
static cycle_t read_hv_clock_tsc(struct clocksource *arg)
@@ -329,7 +330,7 @@ int hv_post_message(union hv_connection_id connection_id,
aligned_msg->payload_size = payload_size;
memcpy((void *)aligned_msg->payload, payload, payload_size);
- status = do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL)
+ status = hv_do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL)
& 0xFFFF;
put_cpu();
@@ -347,7 +348,7 @@ u16 hv_signal_event(void *con_id)
{
u16 status;
- status = (do_hypercall(HVCALL_SIGNAL_EVENT, con_id, NULL) & 0xFFFF);
+ status = (hv_do_hypercall(HVCALL_SIGNAL_EVENT, con_id, NULL) & 0xFFFF);
return status;
}
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index 02393b6..ea0a0e3 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -983,6 +983,7 @@ int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj,
bool fb_overlap_ok);
int vmbus_cpu_number_to_vp_number(int cpu_number);
+u64 hv_do_hypercall(u64 control, void *input, void *output);
/**
* VMBUS_DEVICE - macro used to describe a specific hyperv vmbus device
--
1.7.4.1
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